2
#include "exec/gdbstub.h"
4
#include "qemu/host-utils.h"
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#include "sysemu/arch_init.h"
6
#include "sysemu/sysemu.h"
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#include "qemu/bitops.h"
9
#ifndef CONFIG_USER_ONLY
10
static inline int get_phys_addr(CPUARMState *env, uint32_t address,
11
int access_type, int is_user,
12
hwaddr *phys_ptr, int *prot,
13
target_ulong *page_size);
16
static int vfp_gdb_get_reg(CPUARMState *env, uint8_t *buf, int reg)
20
/* VFP data registers are always little-endian. */
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nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
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stfq_le_p(buf, env->vfp.regs[reg]);
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if (arm_feature(env, ARM_FEATURE_NEON)) {
27
/* Aliases for Q regs. */
30
stfq_le_p(buf, env->vfp.regs[(reg - 32) * 2]);
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stfq_le_p(buf + 8, env->vfp.regs[(reg - 32) * 2 + 1]);
35
switch (reg - nregs) {
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case 0: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSID]); return 4;
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case 1: stl_p(buf, env->vfp.xregs[ARM_VFP_FPSCR]); return 4;
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case 2: stl_p(buf, env->vfp.xregs[ARM_VFP_FPEXC]); return 4;
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static int vfp_gdb_set_reg(CPUARMState *env, uint8_t *buf, int reg)
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nregs = arm_feature(env, ARM_FEATURE_VFP3) ? 32 : 16;
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env->vfp.regs[reg] = ldfq_le_p(buf);
52
if (arm_feature(env, ARM_FEATURE_NEON)) {
55
env->vfp.regs[(reg - 32) * 2] = ldfq_le_p(buf);
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env->vfp.regs[(reg - 32) * 2 + 1] = ldfq_le_p(buf + 8);
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switch (reg - nregs) {
61
case 0: env->vfp.xregs[ARM_VFP_FPSID] = ldl_p(buf); return 4;
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case 1: env->vfp.xregs[ARM_VFP_FPSCR] = ldl_p(buf); return 4;
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case 2: env->vfp.xregs[ARM_VFP_FPEXC] = ldl_p(buf) & (1 << 30); return 4;
68
static int raw_read(CPUARMState *env, const ARMCPRegInfo *ri,
71
if (ri->type & ARM_CP_64BIT) {
72
*value = CPREG_FIELD64(env, ri);
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*value = CPREG_FIELD32(env, ri);
79
static int raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
82
if (ri->type & ARM_CP_64BIT) {
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CPREG_FIELD64(env, ri) = value;
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CPREG_FIELD32(env, ri) = value;
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static bool read_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
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/* Raw read of a coprocessor register (as needed for migration, etc)
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* return true on success, false if the read is impossible for some reason.
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if (ri->type & ARM_CP_CONST) {
98
} else if (ri->raw_readfn) {
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return (ri->raw_readfn(env, ri, v) == 0);
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} else if (ri->readfn) {
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return (ri->readfn(env, ri, v) == 0);
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if (ri->type & ARM_CP_64BIT) {
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*v = CPREG_FIELD64(env, ri);
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*v = CPREG_FIELD32(env, ri);
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static bool write_raw_cp_reg(CPUARMState *env, const ARMCPRegInfo *ri,
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/* Raw write of a coprocessor register (as needed for migration, etc).
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* Return true on success, false if the write is impossible for some reason.
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* Note that constant registers are treated as write-ignored; the
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* caller should check for success by whether a readback gives the
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if (ri->type & ARM_CP_CONST) {
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} else if (ri->raw_writefn) {
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return (ri->raw_writefn(env, ri, v) == 0);
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} else if (ri->writefn) {
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return (ri->writefn(env, ri, v) == 0);
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if (ri->type & ARM_CP_64BIT) {
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CPREG_FIELD64(env, ri) = v;
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CPREG_FIELD32(env, ri) = v;
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bool write_cpustate_to_list(ARMCPU *cpu)
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/* Write the coprocessor state from cpu->env to the (index,value) list. */
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for (i = 0; i < cpu->cpreg_array_len; i++) {
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uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
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const ARMCPRegInfo *ri;
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ri = get_arm_cp_reginfo(cpu, regidx);
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if (ri->type & ARM_CP_NO_MIGRATE) {
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if (!read_raw_cp_reg(&cpu->env, ri, &v)) {
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cpu->cpreg_values[i] = v;
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bool write_list_to_cpustate(ARMCPU *cpu)
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for (i = 0; i < cpu->cpreg_array_len; i++) {
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uint32_t regidx = kvm_to_cpreg_id(cpu->cpreg_indexes[i]);
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uint64_t v = cpu->cpreg_values[i];
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const ARMCPRegInfo *ri;
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ri = get_arm_cp_reginfo(cpu, regidx);
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if (ri->type & ARM_CP_NO_MIGRATE) {
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/* Write value and confirm it reads back as written
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* (to catch read-only registers and partially read-only
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* registers where the incoming migration value doesn't match)
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if (!write_raw_cp_reg(&cpu->env, ri, v) ||
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!read_raw_cp_reg(&cpu->env, ri, &readback) ||
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static void add_cpreg_to_list(gpointer key, gpointer opaque)
198
ARMCPU *cpu = opaque;
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const ARMCPRegInfo *ri;
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regidx = *(uint32_t *)key;
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ri = get_arm_cp_reginfo(cpu, regidx);
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if (!(ri->type & ARM_CP_NO_MIGRATE)) {
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cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
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/* The value array need not be initialized at this point */
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cpu->cpreg_array_len++;
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static void count_cpreg(gpointer key, gpointer opaque)
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ARMCPU *cpu = opaque;
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const ARMCPRegInfo *ri;
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regidx = *(uint32_t *)key;
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ri = get_arm_cp_reginfo(cpu, regidx);
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if (!(ri->type & ARM_CP_NO_MIGRATE)) {
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cpu->cpreg_array_len++;
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static gint cpreg_key_compare(gconstpointer a, gconstpointer b)
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uint64_t aidx = cpreg_to_kvm_id(*(uint32_t *)a);
229
uint64_t bidx = cpreg_to_kvm_id(*(uint32_t *)b);
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static void cpreg_make_keylist(gpointer key, gpointer value, gpointer udata)
242
GList **plist = udata;
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*plist = g_list_prepend(*plist, key);
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void init_cpreg_list(ARMCPU *cpu)
249
/* Initialise the cpreg_tuples[] array based on the cp_regs hash.
250
* Note that we require cpreg_tuples[] to be sorted by key ID.
255
g_hash_table_foreach(cpu->cp_regs, cpreg_make_keylist, &keys);
257
keys = g_list_sort(keys, cpreg_key_compare);
259
cpu->cpreg_array_len = 0;
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g_list_foreach(keys, count_cpreg, cpu);
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arraylen = cpu->cpreg_array_len;
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cpu->cpreg_indexes = g_new(uint64_t, arraylen);
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cpu->cpreg_values = g_new(uint64_t, arraylen);
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cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
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cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
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cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
269
cpu->cpreg_array_len = 0;
271
g_list_foreach(keys, add_cpreg_to_list, cpu);
273
assert(cpu->cpreg_array_len == arraylen);
278
static int dacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
280
env->cp15.c3 = value;
281
tlb_flush(env, 1); /* Flush TLB as domain not tracked in TLB */
285
static int fcse_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
287
if (env->cp15.c13_fcse != value) {
288
/* Unlike real hardware the qemu TLB uses virtual addresses,
289
* not modified virtual addresses, so this causes a TLB flush.
292
env->cp15.c13_fcse = value;
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static int contextidr_write(CPUARMState *env, const ARMCPRegInfo *ri,
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if (env->cp15.c13_context != value && !arm_feature(env, ARM_FEATURE_MPU)) {
300
/* For VMSA (when not using the LPAE long descriptor page table
301
* format) this register includes the ASID, so do a TLB flush.
302
* For PMSA it is purely a process ID and no action is needed.
306
env->cp15.c13_context = value;
310
static int tlbiall_write(CPUARMState *env, const ARMCPRegInfo *ri,
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/* Invalidate all (TLBIALL) */
318
static int tlbimva_write(CPUARMState *env, const ARMCPRegInfo *ri,
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/* Invalidate single TLB entry by MVA and ASID (TLBIMVA) */
322
tlb_flush_page(env, value & TARGET_PAGE_MASK);
326
static int tlbiasid_write(CPUARMState *env, const ARMCPRegInfo *ri,
329
/* Invalidate by ASID (TLBIASID) */
330
tlb_flush(env, value == 0);
334
static int tlbimvaa_write(CPUARMState *env, const ARMCPRegInfo *ri,
337
/* Invalidate single entry by MVA, all ASIDs (TLBIMVAA) */
338
tlb_flush_page(env, value & TARGET_PAGE_MASK);
342
static const ARMCPRegInfo cp_reginfo[] = {
343
/* DBGDIDR: just RAZ. In particular this means the "debug architecture
344
* version" bits will read as a reserved value, which should cause
345
* Linux to not try to use the debug hardware.
347
{ .name = "DBGDIDR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 0,
348
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
349
/* MMU Domain access control / MPU write buffer control */
350
{ .name = "DACR", .cp = 15,
351
.crn = 3, .crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c3),
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.resetvalue = 0, .writefn = dacr_write, .raw_writefn = raw_write, },
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{ .name = "FCSEIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 0,
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
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.resetvalue = 0, .writefn = fcse_write, .raw_writefn = raw_write, },
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{ .name = "CONTEXTIDR", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 1,
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.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c13_fcse),
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.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
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/* ??? This covers not just the impdef TLB lockdown registers but also
361
* some v7VMSA registers relating to TEX remap, so it is overly broad.
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{ .name = "TLB_LOCKDOWN", .cp = 15, .crn = 10, .crm = CP_ANY,
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.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_NOP },
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/* MMU TLB control. Note that the wildcarding means we cover not just
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* the unified TLB ops but also the dside/iside/inner-shareable variants.
368
{ .name = "TLBIALL", .cp = 15, .crn = 8, .crm = CP_ANY,
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.opc1 = CP_ANY, .opc2 = 0, .access = PL1_W, .writefn = tlbiall_write,
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.type = ARM_CP_NO_MIGRATE },
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{ .name = "TLBIMVA", .cp = 15, .crn = 8, .crm = CP_ANY,
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.opc1 = CP_ANY, .opc2 = 1, .access = PL1_W, .writefn = tlbimva_write,
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.type = ARM_CP_NO_MIGRATE },
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{ .name = "TLBIASID", .cp = 15, .crn = 8, .crm = CP_ANY,
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.opc1 = CP_ANY, .opc2 = 2, .access = PL1_W, .writefn = tlbiasid_write,
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.type = ARM_CP_NO_MIGRATE },
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{ .name = "TLBIMVAA", .cp = 15, .crn = 8, .crm = CP_ANY,
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.opc1 = CP_ANY, .opc2 = 3, .access = PL1_W, .writefn = tlbimvaa_write,
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.type = ARM_CP_NO_MIGRATE },
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/* Cache maintenance ops; some of this space may be overridden later. */
381
{ .name = "CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
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.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
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.type = ARM_CP_NOP | ARM_CP_OVERRIDE },
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static const ARMCPRegInfo not_v6_cp_reginfo[] = {
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/* Not all pre-v6 cores implemented this WFI, so this is slightly
391
{ .name = "WFI_v5", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = 2,
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.access = PL1_W, .type = ARM_CP_WFI },
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static const ARMCPRegInfo not_v7_cp_reginfo[] = {
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/* Standard v6 WFI (also used in some pre-v6 cores); not in v7 (which
398
* is UNPREDICTABLE; we choose to NOP as most implementations do).
400
{ .name = "WFI_v6", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
401
.access = PL1_W, .type = ARM_CP_WFI },
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/* L1 cache lockdown. Not architectural in v6 and earlier but in practice
403
* implemented in 926, 946, 1026, 1136, 1176 and 11MPCore. StrongARM and
404
* OMAPCP will override this space.
406
{ .name = "DLOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 0,
407
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_data),
409
{ .name = "ILOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 0, .opc2 = 1,
410
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_insn),
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/* v6 doesn't have the cache ID registers but Linux reads them anyway */
413
{ .name = "DUMMY", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = CP_ANY,
414
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
419
static int cpacr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
421
if (env->cp15.c1_coproc != value) {
422
env->cp15.c1_coproc = value;
423
/* ??? Is this safe when called from within a TB? */
429
static const ARMCPRegInfo v6_cp_reginfo[] = {
430
/* prefetch by MVA in v6, NOP in v7 */
431
{ .name = "MVA_prefetch",
432
.cp = 15, .crn = 7, .crm = 13, .opc1 = 0, .opc2 = 1,
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.access = PL1_W, .type = ARM_CP_NOP },
434
{ .name = "ISB", .cp = 15, .crn = 7, .crm = 5, .opc1 = 0, .opc2 = 4,
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.access = PL0_W, .type = ARM_CP_NOP },
436
{ .name = "DSB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 4,
437
.access = PL0_W, .type = ARM_CP_NOP },
438
{ .name = "DMB", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 5,
439
.access = PL0_W, .type = ARM_CP_NOP },
440
{ .name = "IFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 2,
441
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_insn),
443
/* Watchpoint Fault Address Register : should actually only be present
444
* for 1136, 1176, 11MPCore.
446
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
447
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
448
{ .name = "CPACR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2,
449
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_coproc),
450
.resetvalue = 0, .writefn = cpacr_write },
455
static int pmreg_read(CPUARMState *env, const ARMCPRegInfo *ri,
458
/* Generic performance monitor register read function for where
459
* user access may be allowed by PMUSERENR.
461
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
464
*value = CPREG_FIELD32(env, ri);
468
static int pmcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
471
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
474
/* only the DP, X, D and E bits are writable */
475
env->cp15.c9_pmcr &= ~0x39;
476
env->cp15.c9_pmcr |= (value & 0x39);
480
static int pmcntenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
483
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
487
env->cp15.c9_pmcnten |= value;
491
static int pmcntenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
494
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
498
env->cp15.c9_pmcnten &= ~value;
502
static int pmovsr_write(CPUARMState *env, const ARMCPRegInfo *ri,
505
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
508
env->cp15.c9_pmovsr &= ~value;
512
static int pmxevtyper_write(CPUARMState *env, const ARMCPRegInfo *ri,
515
if (arm_current_pl(env) == 0 && !env->cp15.c9_pmuserenr) {
518
env->cp15.c9_pmxevtyper = value & 0xff;
522
static int pmuserenr_write(CPUARMState *env, const ARMCPRegInfo *ri,
525
env->cp15.c9_pmuserenr = value & 1;
529
static int pmintenset_write(CPUARMState *env, const ARMCPRegInfo *ri,
532
/* We have no event counters so only the C bit can be changed */
534
env->cp15.c9_pminten |= value;
538
static int pmintenclr_write(CPUARMState *env, const ARMCPRegInfo *ri,
542
env->cp15.c9_pminten &= ~value;
546
static int vbar_write(CPUARMState *env, const ARMCPRegInfo *ri,
549
env->cp15.c12_vbar = value & ~0x1Ful;
553
static int ccsidr_read(CPUARMState *env, const ARMCPRegInfo *ri,
556
ARMCPU *cpu = arm_env_get_cpu(env);
557
*value = cpu->ccsidr[env->cp15.c0_cssel];
561
static int csselr_write(CPUARMState *env, const ARMCPRegInfo *ri,
564
env->cp15.c0_cssel = value & 0xf;
568
static const ARMCPRegInfo v7_cp_reginfo[] = {
569
/* DBGDRAR, DBGDSAR: always RAZ since we don't implement memory mapped
572
{ .name = "DBGDRAR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
573
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
574
{ .name = "DBGDSAR", .cp = 14, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
575
.access = PL0_R, .type = ARM_CP_CONST, .resetvalue = 0 },
576
/* the old v6 WFI, UNPREDICTABLE in v7 but we choose to NOP */
577
{ .name = "NOP", .cp = 15, .crn = 7, .crm = 0, .opc1 = 0, .opc2 = 4,
578
.access = PL1_W, .type = ARM_CP_NOP },
579
/* Performance monitors are implementation defined in v7,
580
* but with an ARM recommended set of registers, which we
581
* follow (although we don't actually implement any counters)
583
* Performance registers fall into three categories:
584
* (a) always UNDEF in PL0, RW in PL1 (PMINTENSET, PMINTENCLR)
585
* (b) RO in PL0 (ie UNDEF on write), RW in PL1 (PMUSERENR)
586
* (c) UNDEF in PL0 if PMUSERENR.EN==0, otherwise accessible (all others)
587
* For the cases controlled by PMUSERENR we must set .access to PL0_RW
588
* or PL0_RO as appropriate and then check PMUSERENR in the helper fn.
590
{ .name = "PMCNTENSET", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 1,
591
.access = PL0_RW, .resetvalue = 0,
592
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
593
.readfn = pmreg_read, .writefn = pmcntenset_write,
594
.raw_readfn = raw_read, .raw_writefn = raw_write },
595
{ .name = "PMCNTENCLR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 2,
596
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmcnten),
597
.readfn = pmreg_read, .writefn = pmcntenclr_write,
598
.type = ARM_CP_NO_MIGRATE },
599
{ .name = "PMOVSR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 3,
600
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, cp15.c9_pmovsr),
601
.readfn = pmreg_read, .writefn = pmovsr_write,
602
.raw_readfn = raw_read, .raw_writefn = raw_write },
603
/* Unimplemented so WI. Strictly speaking write accesses in PL0 should
606
{ .name = "PMSWINC", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 4,
607
.access = PL0_W, .type = ARM_CP_NOP },
608
/* Since we don't implement any events, writing to PMSELR is UNPREDICTABLE.
609
* We choose to RAZ/WI. XXX should respect PMUSERENR.
611
{ .name = "PMSELR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 5,
612
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
613
/* Unimplemented, RAZ/WI. XXX PMUSERENR */
614
{ .name = "PMCCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 0,
615
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
616
{ .name = "PMXEVTYPER", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 1,
618
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmxevtyper),
619
.readfn = pmreg_read, .writefn = pmxevtyper_write,
620
.raw_readfn = raw_read, .raw_writefn = raw_write },
621
/* Unimplemented, RAZ/WI. XXX PMUSERENR */
622
{ .name = "PMXEVCNTR", .cp = 15, .crn = 9, .crm = 13, .opc1 = 0, .opc2 = 2,
623
.access = PL0_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
624
{ .name = "PMUSERENR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 0,
625
.access = PL0_R | PL1_RW,
626
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmuserenr),
628
.writefn = pmuserenr_write, .raw_writefn = raw_write },
629
{ .name = "PMINTENSET", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 1,
631
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
633
.writefn = pmintenset_write, .raw_writefn = raw_write },
634
{ .name = "PMINTENCLR", .cp = 15, .crn = 9, .crm = 14, .opc1 = 0, .opc2 = 2,
635
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
636
.fieldoffset = offsetof(CPUARMState, cp15.c9_pminten),
637
.resetvalue = 0, .writefn = pmintenclr_write, },
638
{ .name = "CCSIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
639
.access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
640
{ .name = "CSSELR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
641
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel),
642
.writefn = csselr_write, .resetvalue = 0 },
643
/* Auxiliary ID register: this actually has an IMPDEF value but for now
644
* just RAZ for all cores:
646
{ .name = "AIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 7,
647
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
651
static int teecr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
658
static int teehbr_read(CPUARMState *env, const ARMCPRegInfo *ri,
661
/* This is a helper function because the user access rights
662
* depend on the value of the TEECR.
664
if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
667
*value = env->teehbr;
671
static int teehbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
674
if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
681
static const ARMCPRegInfo t2ee_cp_reginfo[] = {
682
{ .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
683
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr),
685
.writefn = teecr_write },
686
{ .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
687
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
688
.resetvalue = 0, .raw_readfn = raw_read, .raw_writefn = raw_write,
689
.readfn = teehbr_read, .writefn = teehbr_write },
693
static const ARMCPRegInfo v6k_cp_reginfo[] = {
694
{ .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
696
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls1),
698
{ .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
699
.access = PL0_R|PL1_W,
700
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls2),
702
{ .name = "TPIDRPRW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 4,
704
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls3),
709
#ifndef CONFIG_USER_ONLY
711
static uint64_t gt_get_countervalue(CPUARMState *env)
713
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
716
static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
718
ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx];
721
/* Timer enabled: calculate and set current ISTATUS, irq, and
722
* reset timer to when ISTATUS next has to change
724
uint64_t count = gt_get_countervalue(&cpu->env);
725
/* Note that this must be unsigned 64 bit arithmetic: */
726
int istatus = count >= gt->cval;
729
gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
730
qemu_set_irq(cpu->gt_timer_outputs[timeridx],
731
(istatus && !(gt->ctl & 2)));
733
/* Next transition is when count rolls back over to zero */
734
nexttick = UINT64_MAX;
736
/* Next transition is when we hit cval */
739
/* Note that the desired next expiry time might be beyond the
740
* signed-64-bit range of a QEMUTimer -- in this case we just
741
* set the timer for as far in the future as possible. When the
742
* timer expires we will reset the timer for any remaining period.
744
if (nexttick > INT64_MAX / GTIMER_SCALE) {
745
nexttick = INT64_MAX / GTIMER_SCALE;
747
timer_mod(cpu->gt_timer[timeridx], nexttick);
749
/* Timer disabled: ISTATUS and timer output always clear */
751
qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
752
timer_del(cpu->gt_timer[timeridx]);
756
static int gt_cntfrq_read(CPUARMState *env, const ARMCPRegInfo *ri,
759
/* Not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */
760
if (arm_current_pl(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) {
763
*value = env->cp15.c14_cntfrq;
767
static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri)
769
ARMCPU *cpu = arm_env_get_cpu(env);
770
int timeridx = ri->opc1 & 1;
772
timer_del(cpu->gt_timer[timeridx]);
775
static int gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri,
778
int timeridx = ri->opc1 & 1;
780
if (arm_current_pl(env) == 0 &&
781
!extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
784
*value = gt_get_countervalue(env);
788
static int gt_cval_read(CPUARMState *env, const ARMCPRegInfo *ri,
791
int timeridx = ri->opc1 & 1;
793
if (arm_current_pl(env) == 0 &&
794
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
797
*value = env->cp15.c14_timer[timeridx].cval;
801
static int gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
804
int timeridx = ri->opc1 & 1;
806
env->cp15.c14_timer[timeridx].cval = value;
807
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
810
static int gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri,
813
int timeridx = ri->crm & 1;
815
if (arm_current_pl(env) == 0 &&
816
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
819
*value = (uint32_t)(env->cp15.c14_timer[timeridx].cval -
820
gt_get_countervalue(env));
824
static int gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
827
int timeridx = ri->crm & 1;
829
env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) +
830
+ sextract64(value, 0, 32);
831
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
835
static int gt_ctl_read(CPUARMState *env, const ARMCPRegInfo *ri,
838
int timeridx = ri->crm & 1;
840
if (arm_current_pl(env) == 0 &&
841
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
844
*value = env->cp15.c14_timer[timeridx].ctl;
848
static int gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
851
ARMCPU *cpu = arm_env_get_cpu(env);
852
int timeridx = ri->crm & 1;
853
uint32_t oldval = env->cp15.c14_timer[timeridx].ctl;
855
env->cp15.c14_timer[timeridx].ctl = value & 3;
856
if ((oldval ^ value) & 1) {
858
gt_recalc_timer(cpu, timeridx);
859
} else if ((oldval & value) & 2) {
860
/* IMASK toggled: don't need to recalculate,
861
* just set the interrupt line based on ISTATUS
863
qemu_set_irq(cpu->gt_timer_outputs[timeridx],
864
(oldval & 4) && (value & 2));
869
void arm_gt_ptimer_cb(void *opaque)
871
ARMCPU *cpu = opaque;
873
gt_recalc_timer(cpu, GTIMER_PHYS);
876
void arm_gt_vtimer_cb(void *opaque)
878
ARMCPU *cpu = opaque;
880
gt_recalc_timer(cpu, GTIMER_VIRT);
883
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
884
/* Note that CNTFRQ is purely reads-as-written for the benefit
885
* of software; writing it doesn't actually change the timer frequency.
886
* Our reset value matches the fixed frequency we implement the timer at.
888
{ .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
889
.access = PL1_RW | PL0_R,
890
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq),
891
.resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE,
892
.readfn = gt_cntfrq_read, .raw_readfn = raw_read,
894
/* overall control: mostly access permissions */
895
{ .name = "CNTKCTL", .cp = 15, .crn = 14, .crm = 1, .opc1 = 0, .opc2 = 0,
897
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
900
/* per-timer control */
901
{ .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
902
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
903
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl),
905
.readfn = gt_ctl_read, .writefn = gt_ctl_write,
906
.raw_readfn = raw_read, .raw_writefn = raw_write,
908
{ .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
909
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
910
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl),
912
.readfn = gt_ctl_read, .writefn = gt_ctl_write,
913
.raw_readfn = raw_read, .raw_writefn = raw_write,
915
/* TimerValue views: a 32 bit downcounting view of the underlying state */
916
{ .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
917
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
918
.readfn = gt_tval_read, .writefn = gt_tval_write,
920
{ .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
921
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
922
.readfn = gt_tval_read, .writefn = gt_tval_write,
924
/* The counter itself */
925
{ .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
926
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
927
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
929
{ .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
930
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
931
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
933
/* Comparison value, indicating when the timer goes off */
934
{ .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
935
.access = PL1_RW | PL0_R,
936
.type = ARM_CP_64BIT | ARM_CP_IO,
937
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
939
.readfn = gt_cval_read, .writefn = gt_cval_write,
940
.raw_readfn = raw_read, .raw_writefn = raw_write,
942
{ .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
943
.access = PL1_RW | PL0_R,
944
.type = ARM_CP_64BIT | ARM_CP_IO,
945
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
947
.readfn = gt_cval_read, .writefn = gt_cval_write,
948
.raw_readfn = raw_read, .raw_writefn = raw_write,
954
/* In user-mode none of the generic timer registers are accessible,
955
* and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
956
* so instead just don't register any of them.
958
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
964
static int par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
966
if (arm_feature(env, ARM_FEATURE_LPAE)) {
967
env->cp15.c7_par = value;
968
} else if (arm_feature(env, ARM_FEATURE_V7)) {
969
env->cp15.c7_par = value & 0xfffff6ff;
971
env->cp15.c7_par = value & 0xfffff1ff;
976
#ifndef CONFIG_USER_ONLY
977
/* get_phys_addr() isn't present for user-mode-only targets */
979
/* Return true if extended addresses are enabled, ie this is an
980
* LPAE implementation and we are using the long-descriptor translation
981
* table format because the TTBCR EAE bit is set.
983
static inline bool extended_addresses_enabled(CPUARMState *env)
985
return arm_feature(env, ARM_FEATURE_LPAE)
986
&& (env->cp15.c2_control & (1U << 31));
989
static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
992
target_ulong page_size;
994
int ret, is_user = ri->opc2 & 2;
995
int access_type = ri->opc2 & 1;
998
/* Other states are only available with TrustZone */
1001
ret = get_phys_addr(env, value, access_type, is_user,
1002
&phys_addr, &prot, &page_size);
1003
if (extended_addresses_enabled(env)) {
1004
/* ret is a DFSR/IFSR value for the long descriptor
1005
* translation table format, but with WnR always clear.
1006
* Convert it to a 64-bit PAR.
1008
uint64_t par64 = (1 << 11); /* LPAE bit always set */
1010
par64 |= phys_addr & ~0xfffULL;
1011
/* We don't set the ATTR or SH fields in the PAR. */
1014
par64 |= (ret & 0x3f) << 1; /* FS */
1015
/* Note that S2WLK and FSTAGE are always zero, because we don't
1016
* implement virtualization and therefore there can't be a stage 2
1020
env->cp15.c7_par = par64;
1021
env->cp15.c7_par_hi = par64 >> 32;
1023
/* ret is a DFSR/IFSR value for the short descriptor
1024
* translation table format (with WnR always clear).
1025
* Convert it to a 32-bit PAR.
1028
/* We do not set any attribute bits in the PAR */
1029
if (page_size == (1 << 24)
1030
&& arm_feature(env, ARM_FEATURE_V7)) {
1031
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
1033
env->cp15.c7_par = phys_addr & 0xfffff000;
1036
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) |
1037
((ret & (12 << 1)) >> 6) |
1038
((ret & 0xf) << 1) | 1;
1040
env->cp15.c7_par_hi = 0;
1046
static const ARMCPRegInfo vapa_cp_reginfo[] = {
1047
{ .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
1048
.access = PL1_RW, .resetvalue = 0,
1049
.fieldoffset = offsetof(CPUARMState, cp15.c7_par),
1050
.writefn = par_write },
1051
#ifndef CONFIG_USER_ONLY
1052
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
1053
.access = PL1_W, .writefn = ats_write, .type = ARM_CP_NO_MIGRATE },
1058
/* Return basic MPU access permission bits. */
1059
static uint32_t simple_mpu_ap_bits(uint32_t val)
1066
for (i = 0; i < 16; i += 2) {
1067
ret |= (val >> i) & mask;
1073
/* Pad basic MPU access permission bits to extended format. */
1074
static uint32_t extended_mpu_ap_bits(uint32_t val)
1081
for (i = 0; i < 16; i += 2) {
1082
ret |= (val & mask) << i;
1088
static int pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1091
env->cp15.c5_data = extended_mpu_ap_bits(value);
1095
static int pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri,
1098
*value = simple_mpu_ap_bits(env->cp15.c5_data);
1102
static int pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1105
env->cp15.c5_insn = extended_mpu_ap_bits(value);
1109
static int pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri,
1112
*value = simple_mpu_ap_bits(env->cp15.c5_insn);
1116
static int arm946_prbs_read(CPUARMState *env, const ARMCPRegInfo *ri,
1122
*value = env->cp15.c6_region[ri->crm];
1126
static int arm946_prbs_write(CPUARMState *env, const ARMCPRegInfo *ri,
1132
env->cp15.c6_region[ri->crm] = value;
1136
static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
1137
{ .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1138
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1139
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0,
1140
.readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
1141
{ .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1142
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1143
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0,
1144
.readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
1145
{ .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
1147
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1148
{ .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
1150
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1151
{ .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1153
.fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
1154
{ .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1156
.fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
1157
/* Protection region base and size registers */
1158
{ .name = "946_PRBS", .cp = 15, .crn = 6, .crm = CP_ANY, .opc1 = 0,
1159
.opc2 = CP_ANY, .access = PL1_RW,
1160
.readfn = arm946_prbs_read, .writefn = arm946_prbs_write, },
1164
static int vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1167
int maskshift = extract32(value, 0, 3);
1169
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1170
value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
1174
/* Note that we always calculate c2_mask and c2_base_mask, but
1175
* they are only used for short-descriptor tables (ie if EAE is 0);
1176
* for long-descriptor tables the TTBCR fields are used differently
1177
* and the c2_mask and c2_base_mask values are meaningless.
1179
env->cp15.c2_control = value;
1180
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> maskshift);
1181
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
1185
static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1188
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1189
/* With LPAE the TTBCR could result in a change of ASID
1190
* via the TTBCR.A1 bit, so do a TLB flush.
1194
return vmsa_ttbcr_raw_write(env, ri, value);
1197
static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1199
env->cp15.c2_base_mask = 0xffffc000u;
1200
env->cp15.c2_control = 0;
1201
env->cp15.c2_mask = 0;
1204
static const ARMCPRegInfo vmsa_cp_reginfo[] = {
1205
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1207
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1208
{ .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1210
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1211
{ .name = "TTBR0", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1213
.fieldoffset = offsetof(CPUARMState, cp15.c2_base0), .resetvalue = 0, },
1214
{ .name = "TTBR1", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1216
.fieldoffset = offsetof(CPUARMState, cp15.c2_base1), .resetvalue = 0, },
1217
{ .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1218
.access = PL1_RW, .writefn = vmsa_ttbcr_write,
1219
.resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_ttbcr_raw_write,
1220
.fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
1221
{ .name = "DFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
1222
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_data),
1227
static int omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri,
1230
env->cp15.c15_ticonfig = value & 0xe7;
1231
/* The OS_TYPE bit in this register changes the reported CPUID! */
1232
env->cp15.c0_cpuid = (value & (1 << 5)) ?
1233
ARM_CPUID_TI915T : ARM_CPUID_TI925T;
1237
static int omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1240
env->cp15.c15_threadid = value & 0xffff;
1244
static int omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri,
1247
/* Wait-for-interrupt (deprecated) */
1248
cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT);
1252
static int omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri,
1255
/* On OMAP there are registers indicating the max/min index of dcache lines
1256
* containing a dirty line; cache flush operations have to reset these.
1258
env->cp15.c15_i_max = 0x000;
1259
env->cp15.c15_i_min = 0xff0;
1263
static const ARMCPRegInfo omap_cp_reginfo[] = {
1264
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
1265
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE,
1266
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1267
{ .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
1268
.access = PL1_RW, .type = ARM_CP_NOP },
1269
{ .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
1271
.fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
1272
.writefn = omap_ticonfig_write },
1273
{ .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
1275
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
1276
{ .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
1277
.access = PL1_RW, .resetvalue = 0xff0,
1278
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) },
1279
{ .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
1281
.fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
1282
.writefn = omap_threadid_write },
1283
{ .name = "TI925T_STATUS", .cp = 15, .crn = 15,
1284
.crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1285
.type = ARM_CP_NO_MIGRATE,
1286
.readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
1287
/* TODO: Peripheral port remap register:
1288
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
1289
* base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
1292
{ .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
1293
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
1294
.type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE,
1295
.writefn = omap_cachemaint_write },
1296
{ .name = "C9", .cp = 15, .crn = 9,
1297
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
1298
.type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
1302
static int xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri,
1306
if (env->cp15.c15_cpar != value) {
1307
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
1309
env->cp15.c15_cpar = value;
1314
static const ARMCPRegInfo xscale_cp_reginfo[] = {
1315
{ .name = "XSCALE_CPAR",
1316
.cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1317
.fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
1318
.writefn = xscale_cpar_write, },
1319
{ .name = "XSCALE_AUXCR",
1320
.cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW,
1321
.fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr),
1326
static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
1327
/* RAZ/WI the whole crn=15 space, when we don't have a more specific
1328
* implementation of this implementation-defined space.
1329
* Ideally this should eventually disappear in favour of actually
1330
* implementing the correct behaviour for all cores.
1332
{ .name = "C15_IMPDEF", .cp = 15, .crn = 15,
1333
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1334
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1339
static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
1340
/* Cache status: RAZ because we have no cache so it's always clean */
1341
{ .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
1342
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1347
static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
1348
/* We never have a a block transfer operation in progress */
1349
{ .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
1350
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1352
/* The cache ops themselves: these all NOP for QEMU */
1353
{ .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
1354
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1355
{ .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
1356
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1357
{ .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
1358
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1359
{ .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
1360
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1361
{ .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
1362
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1363
{ .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
1364
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1368
static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
1369
/* The cache test-and-clean instructions always return (1 << 30)
1370
* to indicate that there are no dirty cache lines.
1372
{ .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
1373
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1374
.resetvalue = (1 << 30) },
1375
{ .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
1376
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1377
.resetvalue = (1 << 30) },
1381
static const ARMCPRegInfo strongarm_cp_reginfo[] = {
1382
/* Ignore ReadBuffer accesses */
1383
{ .name = "C9_READBUFFER", .cp = 15, .crn = 9,
1384
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1385
.access = PL1_RW, .resetvalue = 0,
1386
.type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE },
1390
static int mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri,
1393
CPUState *cs = CPU(arm_env_get_cpu(env));
1394
uint32_t mpidr = cs->cpu_index;
1395
/* We don't support setting cluster ID ([8..11])
1396
* so these bits always RAZ.
1398
if (arm_feature(env, ARM_FEATURE_V7MP)) {
1399
mpidr |= (1U << 31);
1400
/* Cores which are uniprocessor (non-coherent)
1401
* but still implement the MP extensions set
1402
* bit 30. (For instance, A9UP.) However we do
1403
* not currently model any of those cores.
1410
static const ARMCPRegInfo mpidr_cp_reginfo[] = {
1411
{ .name = "MPIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
1412
.access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE },
1416
static int par64_read(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value)
1418
*value = ((uint64_t)env->cp15.c7_par_hi << 32) | env->cp15.c7_par;
1422
static int par64_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1424
env->cp15.c7_par_hi = value >> 32;
1425
env->cp15.c7_par = value;
1429
static void par64_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1431
env->cp15.c7_par_hi = 0;
1432
env->cp15.c7_par = 0;
1435
static int ttbr064_read(CPUARMState *env, const ARMCPRegInfo *ri,
1438
*value = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
1442
static int ttbr064_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1445
env->cp15.c2_base0_hi = value >> 32;
1446
env->cp15.c2_base0 = value;
1450
static int ttbr064_write(CPUARMState *env, const ARMCPRegInfo *ri,
1453
/* Writes to the 64 bit format TTBRs may change the ASID */
1455
return ttbr064_raw_write(env, ri, value);
1458
static void ttbr064_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1460
env->cp15.c2_base0_hi = 0;
1461
env->cp15.c2_base0 = 0;
1464
static int ttbr164_read(CPUARMState *env, const ARMCPRegInfo *ri,
1467
*value = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
1471
static int ttbr164_write(CPUARMState *env, const ARMCPRegInfo *ri,
1474
env->cp15.c2_base1_hi = value >> 32;
1475
env->cp15.c2_base1 = value;
1479
static void ttbr164_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1481
env->cp15.c2_base1_hi = 0;
1482
env->cp15.c2_base1 = 0;
1485
static const ARMCPRegInfo lpae_cp_reginfo[] = {
1486
/* NOP AMAIR0/1: the override is because these clash with the rather
1487
* broadly specified TLB_LOCKDOWN entry in the generic cp_reginfo.
1489
{ .name = "AMAIR0", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
1490
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1492
{ .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
1493
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1495
/* 64 bit access versions of the (dummy) debug registers */
1496
{ .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
1497
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1498
{ .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
1499
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1500
{ .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
1501
.access = PL1_RW, .type = ARM_CP_64BIT,
1502
.readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset },
1503
{ .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
1504
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr064_read,
1505
.writefn = ttbr064_write, .raw_writefn = ttbr064_raw_write,
1506
.resetfn = ttbr064_reset },
1507
{ .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
1508
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr164_read,
1509
.writefn = ttbr164_write, .resetfn = ttbr164_reset },
1513
static const ARMCPRegInfo trustzone_cp_reginfo[] = {
1514
/* Dummy implementations of registers; we don't enforce the
1515
* 'secure mode only' access checks. TODO: revisit as part of
1516
* proper fake-trustzone support.
1518
{ .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
1519
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
1521
{ .name = "SDER", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 1,
1522
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sedbg),
1524
{ .name = "NSACR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 2,
1525
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_nseac),
1527
{ .name = "VBAR", .cp = 15, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
1528
.access = PL1_RW, .writefn = vbar_write,
1529
.fieldoffset = offsetof(CPUARMState, cp15.c12_vbar),
1531
{ .name = "MVBAR", .cp = 15, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 1,
1532
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
1536
static int sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1538
env->cp15.c1_sys = value;
1539
/* ??? Lots of these bits are not implemented. */
1540
/* This may enable/disable the MMU, so do a TLB flush. */
1545
void register_cp_regs_for_features(ARMCPU *cpu)
1547
/* Register all the coprocessor registers based on feature bits */
1548
CPUARMState *env = &cpu->env;
1549
if (arm_feature(env, ARM_FEATURE_M)) {
1550
/* M profile has no coprocessor registers */
1554
define_arm_cp_regs(cpu, cp_reginfo);
1555
if (arm_feature(env, ARM_FEATURE_V6)) {
1556
/* The ID registers all have impdef reset values */
1557
ARMCPRegInfo v6_idregs[] = {
1558
{ .name = "ID_PFR0", .cp = 15, .crn = 0, .crm = 1,
1559
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1560
.resetvalue = cpu->id_pfr0 },
1561
{ .name = "ID_PFR1", .cp = 15, .crn = 0, .crm = 1,
1562
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1563
.resetvalue = cpu->id_pfr1 },
1564
{ .name = "ID_DFR0", .cp = 15, .crn = 0, .crm = 1,
1565
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1566
.resetvalue = cpu->id_dfr0 },
1567
{ .name = "ID_AFR0", .cp = 15, .crn = 0, .crm = 1,
1568
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1569
.resetvalue = cpu->id_afr0 },
1570
{ .name = "ID_MMFR0", .cp = 15, .crn = 0, .crm = 1,
1571
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1572
.resetvalue = cpu->id_mmfr0 },
1573
{ .name = "ID_MMFR1", .cp = 15, .crn = 0, .crm = 1,
1574
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1575
.resetvalue = cpu->id_mmfr1 },
1576
{ .name = "ID_MMFR2", .cp = 15, .crn = 0, .crm = 1,
1577
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1578
.resetvalue = cpu->id_mmfr2 },
1579
{ .name = "ID_MMFR3", .cp = 15, .crn = 0, .crm = 1,
1580
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1581
.resetvalue = cpu->id_mmfr3 },
1582
{ .name = "ID_ISAR0", .cp = 15, .crn = 0, .crm = 2,
1583
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1584
.resetvalue = cpu->id_isar0 },
1585
{ .name = "ID_ISAR1", .cp = 15, .crn = 0, .crm = 2,
1586
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1587
.resetvalue = cpu->id_isar1 },
1588
{ .name = "ID_ISAR2", .cp = 15, .crn = 0, .crm = 2,
1589
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1590
.resetvalue = cpu->id_isar2 },
1591
{ .name = "ID_ISAR3", .cp = 15, .crn = 0, .crm = 2,
1592
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1593
.resetvalue = cpu->id_isar3 },
1594
{ .name = "ID_ISAR4", .cp = 15, .crn = 0, .crm = 2,
1595
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1596
.resetvalue = cpu->id_isar4 },
1597
{ .name = "ID_ISAR5", .cp = 15, .crn = 0, .crm = 2,
1598
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1599
.resetvalue = cpu->id_isar5 },
1600
/* 6..7 are as yet unallocated and must RAZ */
1601
{ .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2,
1602
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1604
{ .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2,
1605
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1609
define_arm_cp_regs(cpu, v6_idregs);
1610
define_arm_cp_regs(cpu, v6_cp_reginfo);
1612
define_arm_cp_regs(cpu, not_v6_cp_reginfo);
1614
if (arm_feature(env, ARM_FEATURE_V6K)) {
1615
define_arm_cp_regs(cpu, v6k_cp_reginfo);
1617
if (arm_feature(env, ARM_FEATURE_V7)) {
1618
/* v7 performance monitor control register: same implementor
1619
* field as main ID register, and we implement no event counters.
1621
ARMCPRegInfo pmcr = {
1622
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
1623
.access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
1624
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
1625
.readfn = pmreg_read, .writefn = pmcr_write,
1626
.raw_readfn = raw_read, .raw_writefn = raw_write,
1628
ARMCPRegInfo clidr = {
1629
.name = "CLIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
1630
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr
1632
define_one_arm_cp_reg(cpu, &pmcr);
1633
define_one_arm_cp_reg(cpu, &clidr);
1634
define_arm_cp_regs(cpu, v7_cp_reginfo);
1636
define_arm_cp_regs(cpu, not_v7_cp_reginfo);
1638
if (arm_feature(env, ARM_FEATURE_MPU)) {
1639
/* These are the MPU registers prior to PMSAv6. Any new
1640
* PMSA core later than the ARM946 will require that we
1641
* implement the PMSAv6 or PMSAv7 registers, which are
1642
* completely different.
1644
assert(!arm_feature(env, ARM_FEATURE_V6));
1645
define_arm_cp_regs(cpu, pmsav5_cp_reginfo);
1647
define_arm_cp_regs(cpu, vmsa_cp_reginfo);
1649
if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
1650
define_arm_cp_regs(cpu, t2ee_cp_reginfo);
1652
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
1653
define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
1655
if (arm_feature(env, ARM_FEATURE_VAPA)) {
1656
define_arm_cp_regs(cpu, vapa_cp_reginfo);
1658
if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
1659
define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo);
1661
if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
1662
define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo);
1664
if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
1665
define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo);
1667
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
1668
define_arm_cp_regs(cpu, omap_cp_reginfo);
1670
if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
1671
define_arm_cp_regs(cpu, strongarm_cp_reginfo);
1673
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1674
define_arm_cp_regs(cpu, xscale_cp_reginfo);
1676
if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
1677
define_arm_cp_regs(cpu, dummy_c15_cp_reginfo);
1679
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1680
define_arm_cp_regs(cpu, lpae_cp_reginfo);
1682
if (arm_feature(env, ARM_FEATURE_TRUSTZONE)) {
1683
define_arm_cp_regs(cpu, trustzone_cp_reginfo);
1685
/* Slightly awkwardly, the OMAP and StrongARM cores need all of
1686
* cp15 crn=0 to be writes-ignored, whereas for other cores they should
1687
* be read-only (ie write causes UNDEF exception).
1690
ARMCPRegInfo id_cp_reginfo[] = {
1691
/* Note that the MIDR isn't a simple constant register because
1692
* of the TI925 behaviour where writes to another register can
1693
* cause the MIDR value to change.
1695
* Unimplemented registers in the c15 0 0 0 space default to
1696
* MIDR. Define MIDR first as this entire space, then CTR, TCMTR
1697
* and friends override accordingly.
1700
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
1701
.access = PL1_R, .resetvalue = cpu->midr,
1702
.writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
1703
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
1704
.type = ARM_CP_OVERRIDE },
1706
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
1707
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
1709
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2,
1710
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1712
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3,
1713
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1714
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
1716
.cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY,
1717
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1719
.cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY,
1720
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1722
.cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY,
1723
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1725
.cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY,
1726
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1728
.cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY,
1729
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1732
ARMCPRegInfo crn0_wi_reginfo = {
1733
.name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY,
1734
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W,
1735
.type = ARM_CP_NOP | ARM_CP_OVERRIDE
1737
if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
1738
arm_feature(env, ARM_FEATURE_STRONGARM)) {
1740
/* Register the blanket "writes ignored" value first to cover the
1741
* whole space. Then update the specific ID registers to allow write
1742
* access, so that they ignore writes rather than causing them to
1745
define_one_arm_cp_reg(cpu, &crn0_wi_reginfo);
1746
for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
1750
define_arm_cp_regs(cpu, id_cp_reginfo);
1753
if (arm_feature(env, ARM_FEATURE_MPIDR)) {
1754
define_arm_cp_regs(cpu, mpidr_cp_reginfo);
1757
if (arm_feature(env, ARM_FEATURE_AUXCR)) {
1758
ARMCPRegInfo auxcr = {
1759
.name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1,
1760
.access = PL1_RW, .type = ARM_CP_CONST,
1761
.resetvalue = cpu->reset_auxcr
1763
define_one_arm_cp_reg(cpu, &auxcr);
1766
/* Generic registers whose values depend on the implementation */
1768
ARMCPRegInfo sctlr = {
1769
.name = "SCTLR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
1770
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys),
1771
.writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
1772
.raw_writefn = raw_write,
1774
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1775
/* Normally we would always end the TB on an SCTLR write, but Linux
1776
* arch/arm/mach-pxa/sleep.S expects two instructions following
1777
* an MMU enable to execute from cache. Imitate this behaviour.
1779
sctlr.type |= ARM_CP_SUPPRESS_TB_END;
1781
define_one_arm_cp_reg(cpu, &sctlr);
1785
ARMCPU *cpu_arm_init(const char *cpu_model)
1790
oc = cpu_class_by_name(TYPE_ARM_CPU, cpu_model);
1794
cpu = ARM_CPU(object_new(object_class_get_name(oc)));
1796
/* TODO this should be set centrally, once possible */
1797
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
1802
void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
1804
CPUState *cs = CPU(cpu);
1805
CPUARMState *env = &cpu->env;
1807
if (arm_feature(env, ARM_FEATURE_NEON)) {
1808
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1809
51, "arm-neon.xml", 0);
1810
} else if (arm_feature(env, ARM_FEATURE_VFP3)) {
1811
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1812
35, "arm-vfp3.xml", 0);
1813
} else if (arm_feature(env, ARM_FEATURE_VFP)) {
1814
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1815
19, "arm-vfp.xml", 0);
1819
/* Sort alphabetically by type name, except for "any". */
1820
static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
1822
ObjectClass *class_a = (ObjectClass *)a;
1823
ObjectClass *class_b = (ObjectClass *)b;
1824
const char *name_a, *name_b;
1826
name_a = object_class_get_name(class_a);
1827
name_b = object_class_get_name(class_b);
1828
if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) {
1830
} else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) {
1833
return strcmp(name_a, name_b);
1837
static void arm_cpu_list_entry(gpointer data, gpointer user_data)
1839
ObjectClass *oc = data;
1840
CPUListState *s = user_data;
1841
const char *typename;
1844
typename = object_class_get_name(oc);
1845
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
1846
(*s->cpu_fprintf)(s->file, " %s\n",
1851
void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
1855
.cpu_fprintf = cpu_fprintf,
1859
list = object_class_get_list(TYPE_ARM_CPU, false);
1860
list = g_slist_sort(list, arm_cpu_list_compare);
1861
(*cpu_fprintf)(f, "Available CPUs:\n");
1862
g_slist_foreach(list, arm_cpu_list_entry, &s);
1866
static void arm_cpu_add_definition(gpointer data, gpointer user_data)
1868
ObjectClass *oc = data;
1869
CpuDefinitionInfoList **cpu_list = user_data;
1870
CpuDefinitionInfoList *entry;
1871
CpuDefinitionInfo *info;
1872
const char *typename;
1874
typename = object_class_get_name(oc);
1875
info = g_malloc0(sizeof(*info));
1876
info->name = g_strndup(typename,
1877
strlen(typename) - strlen("-" TYPE_ARM_CPU));
1879
entry = g_malloc0(sizeof(*entry));
1880
entry->value = info;
1881
entry->next = *cpu_list;
1885
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
1887
CpuDefinitionInfoList *cpu_list = NULL;
1890
list = object_class_get_list(TYPE_ARM_CPU, false);
1891
g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
1897
void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
1898
const ARMCPRegInfo *r, void *opaque)
1900
/* Define implementations of coprocessor registers.
1901
* We store these in a hashtable because typically
1902
* there are less than 150 registers in a space which
1903
* is 16*16*16*8*8 = 262144 in size.
1904
* Wildcarding is supported for the crm, opc1 and opc2 fields.
1905
* If a register is defined twice then the second definition is
1906
* used, so this can be used to define some generic registers and
1907
* then override them with implementation specific variations.
1908
* At least one of the original and the second definition should
1909
* include ARM_CP_OVERRIDE in its type bits -- this is just a guard
1910
* against accidental use.
1912
int crm, opc1, opc2;
1913
int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
1914
int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
1915
int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
1916
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
1917
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
1918
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
1919
/* 64 bit registers have only CRm and Opc1 fields */
1920
assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
1921
/* Check that the register definition has enough info to handle
1922
* reads and writes if they are permitted.
1924
if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
1925
if (r->access & PL3_R) {
1926
assert(r->fieldoffset || r->readfn);
1928
if (r->access & PL3_W) {
1929
assert(r->fieldoffset || r->writefn);
1932
/* Bad type field probably means missing sentinel at end of reg list */
1933
assert(cptype_valid(r->type));
1934
for (crm = crmmin; crm <= crmmax; crm++) {
1935
for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
1936
for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
1937
uint32_t *key = g_new(uint32_t, 1);
1938
ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
1939
int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0;
1940
*key = ENCODE_CP_REG(r->cp, is64, r->crn, crm, opc1, opc2);
1942
r2->opaque = opaque;
1944
/* Make sure reginfo passed to helpers for wildcarded regs
1945
* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
1950
/* By convention, for wildcarded registers only the first
1951
* entry is used for migration; the others are marked as
1952
* NO_MIGRATE so we don't try to transfer the register
1953
* multiple times. Special registers (ie NOP/WFI) are
1956
if ((r->type & ARM_CP_SPECIAL) ||
1957
((r->crm == CP_ANY) && crm != 0) ||
1958
((r->opc1 == CP_ANY) && opc1 != 0) ||
1959
((r->opc2 == CP_ANY) && opc2 != 0)) {
1960
r2->type |= ARM_CP_NO_MIGRATE;
1963
/* Overriding of an existing definition must be explicitly
1966
if (!(r->type & ARM_CP_OVERRIDE)) {
1967
ARMCPRegInfo *oldreg;
1968
oldreg = g_hash_table_lookup(cpu->cp_regs, key);
1969
if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
1970
fprintf(stderr, "Register redefined: cp=%d %d bit "
1971
"crn=%d crm=%d opc1=%d opc2=%d, "
1972
"was %s, now %s\n", r2->cp, 32 + 32 * is64,
1973
r2->crn, r2->crm, r2->opc1, r2->opc2,
1974
oldreg->name, r2->name);
1975
g_assert_not_reached();
1978
g_hash_table_insert(cpu->cp_regs, key, r2);
1984
void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
1985
const ARMCPRegInfo *regs, void *opaque)
1987
/* Define a whole list of registers */
1988
const ARMCPRegInfo *r;
1989
for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
1990
define_one_arm_cp_reg_with_opaque(cpu, r, opaque);
1994
const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp)
1996
return g_hash_table_lookup(cpu->cp_regs, &encoded_cp);
1999
int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
2002
/* Helper coprocessor write function for write-ignore registers */
2006
int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value)
2008
/* Helper coprocessor write function for read-as-zero registers */
2013
static int bad_mode_switch(CPUARMState *env, int mode)
2015
/* Return true if it is not valid for us to switch to
2016
* this CPU mode (ie all the UNPREDICTABLE cases in
2017
* the ARM ARM CPSRWriteByInstr pseudocode).
2020
case ARM_CPU_MODE_USR:
2021
case ARM_CPU_MODE_SYS:
2022
case ARM_CPU_MODE_SVC:
2023
case ARM_CPU_MODE_ABT:
2024
case ARM_CPU_MODE_UND:
2025
case ARM_CPU_MODE_IRQ:
2026
case ARM_CPU_MODE_FIQ:
2033
uint32_t cpsr_read(CPUARMState *env)
2036
ZF = (env->ZF == 0);
2037
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
2038
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
2039
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
2040
| ((env->condexec_bits & 0xfc) << 8)
2044
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
2046
if (mask & CPSR_NZCV) {
2047
env->ZF = (~val) & CPSR_Z;
2049
env->CF = (val >> 29) & 1;
2050
env->VF = (val << 3) & 0x80000000;
2053
env->QF = ((val & CPSR_Q) != 0);
2055
env->thumb = ((val & CPSR_T) != 0);
2056
if (mask & CPSR_IT_0_1) {
2057
env->condexec_bits &= ~3;
2058
env->condexec_bits |= (val >> 25) & 3;
2060
if (mask & CPSR_IT_2_7) {
2061
env->condexec_bits &= 3;
2062
env->condexec_bits |= (val >> 8) & 0xfc;
2064
if (mask & CPSR_GE) {
2065
env->GE = (val >> 16) & 0xf;
2068
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
2069
if (bad_mode_switch(env, val & CPSR_M)) {
2070
/* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
2071
* We choose to ignore the attempt and leave the CPSR M field
2076
switch_mode(env, val & CPSR_M);
2079
mask &= ~CACHED_CPSR_BITS;
2080
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
2083
/* Sign/zero extend */
2084
uint32_t HELPER(sxtb16)(uint32_t x)
2087
res = (uint16_t)(int8_t)x;
2088
res |= (uint32_t)(int8_t)(x >> 16) << 16;
2092
uint32_t HELPER(uxtb16)(uint32_t x)
2095
res = (uint16_t)(uint8_t)x;
2096
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
2100
uint32_t HELPER(clz)(uint32_t x)
2105
int32_t HELPER(sdiv)(int32_t num, int32_t den)
2109
if (num == INT_MIN && den == -1)
2114
uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
2121
uint32_t HELPER(rbit)(uint32_t x)
2123
x = ((x & 0xff000000) >> 24)
2124
| ((x & 0x00ff0000) >> 8)
2125
| ((x & 0x0000ff00) << 8)
2126
| ((x & 0x000000ff) << 24);
2127
x = ((x & 0xf0f0f0f0) >> 4)
2128
| ((x & 0x0f0f0f0f) << 4);
2129
x = ((x & 0x88888888) >> 3)
2130
| ((x & 0x44444444) >> 1)
2131
| ((x & 0x22222222) << 1)
2132
| ((x & 0x11111111) << 3);
2136
#if defined(CONFIG_USER_ONLY)
2138
void arm_cpu_do_interrupt(CPUState *cs)
2140
ARMCPU *cpu = ARM_CPU(cs);
2141
CPUARMState *env = &cpu->env;
2143
env->exception_index = -1;
2146
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw,
2150
env->exception_index = EXCP_PREFETCH_ABORT;
2151
env->cp15.c6_insn = address;
2153
env->exception_index = EXCP_DATA_ABORT;
2154
env->cp15.c6_data = address;
2159
/* These should probably raise undefined insn exceptions. */
2160
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
2162
cpu_abort(env, "v7m_mrs %d\n", reg);
2165
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
2167
cpu_abort(env, "v7m_mrs %d\n", reg);
2171
void switch_mode(CPUARMState *env, int mode)
2173
if (mode != ARM_CPU_MODE_USR)
2174
cpu_abort(env, "Tried to switch out of user mode\n");
2177
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
2179
cpu_abort(env, "banked r13 write\n");
2182
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
2184
cpu_abort(env, "banked r13 read\n");
2190
/* Map CPU modes onto saved register banks. */
2191
int bank_number(int mode)
2194
case ARM_CPU_MODE_USR:
2195
case ARM_CPU_MODE_SYS:
2197
case ARM_CPU_MODE_SVC:
2199
case ARM_CPU_MODE_ABT:
2201
case ARM_CPU_MODE_UND:
2203
case ARM_CPU_MODE_IRQ:
2205
case ARM_CPU_MODE_FIQ:
2208
hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
2211
void switch_mode(CPUARMState *env, int mode)
2216
old_mode = env->uncached_cpsr & CPSR_M;
2217
if (mode == old_mode)
2220
if (old_mode == ARM_CPU_MODE_FIQ) {
2221
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
2222
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
2223
} else if (mode == ARM_CPU_MODE_FIQ) {
2224
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
2225
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
2228
i = bank_number(old_mode);
2229
env->banked_r13[i] = env->regs[13];
2230
env->banked_r14[i] = env->regs[14];
2231
env->banked_spsr[i] = env->spsr;
2233
i = bank_number(mode);
2234
env->regs[13] = env->banked_r13[i];
2235
env->regs[14] = env->banked_r14[i];
2236
env->spsr = env->banked_spsr[i];
2239
static void v7m_push(CPUARMState *env, uint32_t val)
2242
stl_phys(env->regs[13], val);
2245
static uint32_t v7m_pop(CPUARMState *env)
2248
val = ldl_phys(env->regs[13]);
2253
/* Switch to V7M main or process stack pointer. */
2254
static void switch_v7m_sp(CPUARMState *env, int process)
2257
if (env->v7m.current_sp != process) {
2258
tmp = env->v7m.other_sp;
2259
env->v7m.other_sp = env->regs[13];
2260
env->regs[13] = tmp;
2261
env->v7m.current_sp = process;
2265
static void do_v7m_exception_exit(CPUARMState *env)
2270
type = env->regs[15];
2271
if (env->v7m.exception != 0)
2272
armv7m_nvic_complete_irq(env->nvic, env->v7m.exception);
2274
/* Switch to the target stack. */
2275
switch_v7m_sp(env, (type & 4) != 0);
2276
/* Pop registers. */
2277
env->regs[0] = v7m_pop(env);
2278
env->regs[1] = v7m_pop(env);
2279
env->regs[2] = v7m_pop(env);
2280
env->regs[3] = v7m_pop(env);
2281
env->regs[12] = v7m_pop(env);
2282
env->regs[14] = v7m_pop(env);
2283
env->regs[15] = v7m_pop(env);
2284
xpsr = v7m_pop(env);
2285
xpsr_write(env, xpsr, 0xfffffdff);
2286
/* Undo stack alignment. */
2289
/* ??? The exception return type specifies Thread/Handler mode. However
2290
this is also implied by the xPSR value. Not sure what to do
2291
if there is a mismatch. */
2292
/* ??? Likewise for mismatches between the CONTROL register and the stack
2296
/* Exception names for debug logging; note that not all of these
2297
* precisely correspond to architectural exceptions.
2299
static const char * const excnames[] = {
2300
[EXCP_UDEF] = "Undefined Instruction",
2302
[EXCP_PREFETCH_ABORT] = "Prefetch Abort",
2303
[EXCP_DATA_ABORT] = "Data Abort",
2306
[EXCP_BKPT] = "Breakpoint",
2307
[EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
2308
[EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
2309
[EXCP_STREX] = "QEMU intercept of STREX",
2312
static inline void arm_log_exception(int idx)
2314
if (qemu_loglevel_mask(CPU_LOG_INT)) {
2315
const char *exc = NULL;
2317
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
2318
exc = excnames[idx];
2323
qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
2327
void arm_v7m_cpu_do_interrupt(CPUState *cs)
2329
ARMCPU *cpu = ARM_CPU(cs);
2330
CPUARMState *env = &cpu->env;
2331
uint32_t xpsr = xpsr_read(env);
2335
arm_log_exception(env->exception_index);
2338
if (env->v7m.current_sp)
2340
if (env->v7m.exception == 0)
2343
/* For exceptions we just mark as pending on the NVIC, and let that
2345
/* TODO: Need to escalate if the current priority is higher than the
2346
one we're raising. */
2347
switch (env->exception_index) {
2349
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
2352
/* The PC already points to the next instruction. */
2353
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC);
2355
case EXCP_PREFETCH_ABORT:
2356
case EXCP_DATA_ABORT:
2357
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
2360
if (semihosting_enabled) {
2362
nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
2365
env->regs[0] = do_arm_semihosting(env);
2366
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2370
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG);
2373
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic);
2375
case EXCP_EXCEPTION_EXIT:
2376
do_v7m_exception_exit(env);
2379
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
2380
return; /* Never happens. Keep compiler happy. */
2383
/* Align stack pointer. */
2384
/* ??? Should only do this if Configuration Control Register
2385
STACKALIGN bit is set. */
2386
if (env->regs[13] & 4) {
2390
/* Switch to the handler mode. */
2391
v7m_push(env, xpsr);
2392
v7m_push(env, env->regs[15]);
2393
v7m_push(env, env->regs[14]);
2394
v7m_push(env, env->regs[12]);
2395
v7m_push(env, env->regs[3]);
2396
v7m_push(env, env->regs[2]);
2397
v7m_push(env, env->regs[1]);
2398
v7m_push(env, env->regs[0]);
2399
switch_v7m_sp(env, 0);
2401
env->condexec_bits = 0;
2403
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
2404
env->regs[15] = addr & 0xfffffffe;
2405
env->thumb = addr & 1;
2408
/* Handle a CPU exception. */
2409
void arm_cpu_do_interrupt(CPUState *cs)
2411
ARMCPU *cpu = ARM_CPU(cs);
2412
CPUARMState *env = &cpu->env;
2420
arm_log_exception(env->exception_index);
2422
/* TODO: Vectored interrupt controller. */
2423
switch (env->exception_index) {
2425
new_mode = ARM_CPU_MODE_UND;
2434
if (semihosting_enabled) {
2435
/* Check for semihosting interrupt. */
2437
mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code)
2440
mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code)
2443
/* Only intercept calls from privileged modes, to provide some
2444
semblance of security. */
2445
if (((mask == 0x123456 && !env->thumb)
2446
|| (mask == 0xab && env->thumb))
2447
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
2448
env->regs[0] = do_arm_semihosting(env);
2449
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2453
new_mode = ARM_CPU_MODE_SVC;
2456
/* The PC already points to the next instruction. */
2460
/* See if this is a semihosting syscall. */
2461
if (env->thumb && semihosting_enabled) {
2462
mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
2464
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
2466
env->regs[0] = do_arm_semihosting(env);
2467
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2471
env->cp15.c5_insn = 2;
2472
/* Fall through to prefetch abort. */
2473
case EXCP_PREFETCH_ABORT:
2474
qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
2475
env->cp15.c5_insn, env->cp15.c6_insn);
2476
new_mode = ARM_CPU_MODE_ABT;
2478
mask = CPSR_A | CPSR_I;
2481
case EXCP_DATA_ABORT:
2482
qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
2483
env->cp15.c5_data, env->cp15.c6_data);
2484
new_mode = ARM_CPU_MODE_ABT;
2486
mask = CPSR_A | CPSR_I;
2490
new_mode = ARM_CPU_MODE_IRQ;
2492
/* Disable IRQ and imprecise data aborts. */
2493
mask = CPSR_A | CPSR_I;
2497
new_mode = ARM_CPU_MODE_FIQ;
2499
/* Disable FIQ, IRQ and imprecise data aborts. */
2500
mask = CPSR_A | CPSR_I | CPSR_F;
2504
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
2505
return; /* Never happens. Keep compiler happy. */
2508
if (env->cp15.c1_sys & (1 << 13)) {
2509
/* when enabled, base address cannot be remapped. */
2512
/* ARM v7 architectures provide a vector base address register to remap
2513
* the interrupt vector table.
2514
* This register is only followed in non-monitor mode, and has a secure
2515
* and un-secure copy. Since the cpu is always in a un-secure operation
2516
* and is never in monitor mode this feature is always active.
2517
* Note: only bits 31:5 are valid.
2519
addr += env->cp15.c12_vbar;
2521
switch_mode (env, new_mode);
2522
env->spsr = cpsr_read(env);
2523
/* Clear IT bits. */
2524
env->condexec_bits = 0;
2525
/* Switch to the new mode, and to the correct instruction set. */
2526
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
2527
env->uncached_cpsr |= mask;
2528
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
2529
* and we should just guard the thumb mode on V4 */
2530
if (arm_feature(env, ARM_FEATURE_V4T)) {
2531
env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0;
2533
env->regs[14] = env->regs[15] + offset;
2534
env->regs[15] = addr;
2535
cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
2538
/* Check section/page access permissions.
2539
Returns the page protection flags, or zero if the access is not
2541
static inline int check_ap(CPUARMState *env, int ap, int domain_prot,
2542
int access_type, int is_user)
2546
if (domain_prot == 3) {
2547
return PAGE_READ | PAGE_WRITE;
2550
if (access_type == 1)
2553
prot_ro = PAGE_READ;
2557
if (access_type == 1)
2559
switch ((env->cp15.c1_sys >> 8) & 3) {
2561
return is_user ? 0 : PAGE_READ;
2568
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
2573
return PAGE_READ | PAGE_WRITE;
2575
return PAGE_READ | PAGE_WRITE;
2576
case 4: /* Reserved. */
2579
return is_user ? 0 : prot_ro;
2583
if (!arm_feature (env, ARM_FEATURE_V6K))
2591
static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
2595
if (address & env->cp15.c2_mask)
2596
table = env->cp15.c2_base1 & 0xffffc000;
2598
table = env->cp15.c2_base0 & env->cp15.c2_base_mask;
2600
table |= (address >> 18) & 0x3ffc;
2604
static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type,
2605
int is_user, hwaddr *phys_ptr,
2606
int *prot, target_ulong *page_size)
2617
/* Pagetable walk. */
2618
/* Lookup l1 descriptor. */
2619
table = get_level1_table_address(env, address);
2620
desc = ldl_phys(table);
2622
domain = (desc >> 5) & 0x0f;
2623
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
2625
/* Section translation fault. */
2629
if (domain_prot == 0 || domain_prot == 2) {
2631
code = 9; /* Section domain fault. */
2633
code = 11; /* Page domain fault. */
2638
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
2639
ap = (desc >> 10) & 3;
2641
*page_size = 1024 * 1024;
2643
/* Lookup l2 entry. */
2645
/* Coarse pagetable. */
2646
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
2648
/* Fine pagetable. */
2649
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
2651
desc = ldl_phys(table);
2653
case 0: /* Page translation fault. */
2656
case 1: /* 64k page. */
2657
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
2658
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
2659
*page_size = 0x10000;
2661
case 2: /* 4k page. */
2662
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2663
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
2664
*page_size = 0x1000;
2666
case 3: /* 1k page. */
2668
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2669
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2671
/* Page translation fault. */
2676
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
2678
ap = (desc >> 4) & 3;
2682
/* Never happens, but compiler isn't smart enough to tell. */
2687
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
2689
/* Access permission fault. */
2693
*phys_ptr = phys_addr;
2696
return code | (domain << 4);
2699
static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type,
2700
int is_user, hwaddr *phys_ptr,
2701
int *prot, target_ulong *page_size)
2714
/* Pagetable walk. */
2715
/* Lookup l1 descriptor. */
2716
table = get_level1_table_address(env, address);
2717
desc = ldl_phys(table);
2719
if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) {
2720
/* Section translation fault, or attempt to use the encoding
2721
* which is Reserved on implementations without PXN.
2726
if ((type == 1) || !(desc & (1 << 18))) {
2727
/* Page or Section. */
2728
domain = (desc >> 5) & 0x0f;
2730
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
2731
if (domain_prot == 0 || domain_prot == 2) {
2733
code = 9; /* Section domain fault. */
2735
code = 11; /* Page domain fault. */
2740
if (desc & (1 << 18)) {
2742
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
2743
*page_size = 0x1000000;
2746
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
2747
*page_size = 0x100000;
2749
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
2750
xn = desc & (1 << 4);
2754
if (arm_feature(env, ARM_FEATURE_PXN)) {
2755
pxn = (desc >> 2) & 1;
2757
/* Lookup l2 entry. */
2758
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
2759
desc = ldl_phys(table);
2760
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
2762
case 0: /* Page translation fault. */
2765
case 1: /* 64k page. */
2766
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
2767
xn = desc & (1 << 15);
2768
*page_size = 0x10000;
2770
case 2: case 3: /* 4k page. */
2771
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2773
*page_size = 0x1000;
2776
/* Never happens, but compiler isn't smart enough to tell. */
2781
if (domain_prot == 3) {
2782
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
2784
if (pxn && !is_user) {
2787
if (xn && access_type == 2)
2790
/* The simplified model uses AP[0] as an access control bit. */
2791
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) {
2792
/* Access flag fault. */
2793
code = (code == 15) ? 6 : 3;
2796
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
2798
/* Access permission fault. */
2805
*phys_ptr = phys_addr;
2808
return code | (domain << 4);
2811
/* Fault type for long-descriptor MMU fault reporting; this corresponds
2812
* to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
2815
translation_fault = 1,
2817
permission_fault = 3,
2820
static int get_phys_addr_lpae(CPUARMState *env, uint32_t address,
2821
int access_type, int is_user,
2822
hwaddr *phys_ptr, int *prot,
2823
target_ulong *page_size_ptr)
2825
/* Read an LPAE long-descriptor translation table. */
2826
MMUFaultType fault_type = translation_fault;
2834
uint32_t tableattrs;
2835
target_ulong page_size;
2838
/* Determine whether this address is in the region controlled by
2839
* TTBR0 or TTBR1 (or if it is in neither region and should fault).
2840
* This is a Non-secure PL0/1 stage 1 translation, so controlled by
2841
* TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
2843
uint32_t t0sz = extract32(env->cp15.c2_control, 0, 3);
2844
uint32_t t1sz = extract32(env->cp15.c2_control, 16, 3);
2845
if (t0sz && !extract32(address, 32 - t0sz, t0sz)) {
2846
/* there is a ttbr0 region and we are in it (high bits all zero) */
2848
} else if (t1sz && !extract32(~address, 32 - t1sz, t1sz)) {
2849
/* there is a ttbr1 region and we are in it (high bits all one) */
2852
/* ttbr0 region is "everything not in the ttbr1 region" */
2855
/* ttbr1 region is "everything not in the ttbr0 region" */
2858
/* in the gap between the two regions, this is a Translation fault */
2859
fault_type = translation_fault;
2863
/* Note that QEMU ignores shareability and cacheability attributes,
2864
* so we don't need to do anything with the SH, ORGN, IRGN fields
2865
* in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
2866
* ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
2867
* implement any ASID-like capability so we can ignore it (instead
2868
* we will always flush the TLB any time the ASID is changed).
2870
if (ttbr_select == 0) {
2871
ttbr = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
2872
epd = extract32(env->cp15.c2_control, 7, 1);
2875
ttbr = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
2876
epd = extract32(env->cp15.c2_control, 23, 1);
2881
/* Translation table walk disabled => Translation fault on TLB miss */
2885
/* If the region is small enough we will skip straight to a 2nd level
2886
* lookup. This affects the number of bits of the address used in
2887
* combination with the TTBR to find the first descriptor. ('n' here
2888
* matches the usage in the ARM ARM sB3.6.6, where bits [39..n] are
2889
* from the TTBR, [n-1..3] from the vaddr, and [2..0] always zero).
2898
/* Clear the vaddr bits which aren't part of the within-region address,
2899
* so that we don't have to special case things when calculating the
2900
* first descriptor address.
2902
address &= (0xffffffffU >> tsz);
2904
/* Now we can extract the actual base address from the TTBR */
2905
descaddr = extract64(ttbr, 0, 40);
2906
descaddr &= ~((1ULL << n) - 1);
2910
uint64_t descriptor;
2912
descaddr |= ((address >> (9 * (4 - level))) & 0xff8);
2913
descriptor = ldq_phys(descaddr);
2914
if (!(descriptor & 1) ||
2915
(!(descriptor & 2) && (level == 3))) {
2916
/* Invalid, or the Reserved level 3 encoding */
2919
descaddr = descriptor & 0xfffffff000ULL;
2921
if ((descriptor & 2) && (level < 3)) {
2922
/* Table entry. The top five bits are attributes which may
2923
* propagate down through lower levels of the table (and
2924
* which are all arranged so that 0 means "no effect", so
2925
* we can gather them up by ORing in the bits at each level).
2927
tableattrs |= extract64(descriptor, 59, 5);
2931
/* Block entry at level 1 or 2, or page entry at level 3.
2932
* These are basically the same thing, although the number
2933
* of bits we pull in from the vaddr varies.
2935
page_size = (1 << (39 - (9 * level)));
2936
descaddr |= (address & (page_size - 1));
2937
/* Extract attributes from the descriptor and merge with table attrs */
2938
attrs = extract64(descriptor, 2, 10)
2939
| (extract64(descriptor, 52, 12) << 10);
2940
attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */
2941
attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */
2942
/* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
2943
* means "force PL1 access only", which means forcing AP[1] to 0.
2945
if (extract32(tableattrs, 2, 1)) {
2948
/* Since we're always in the Non-secure state, NSTable is ignored. */
2951
/* Here descaddr is the final physical address, and attributes
2954
fault_type = access_fault;
2955
if ((attrs & (1 << 8)) == 0) {
2959
fault_type = permission_fault;
2960
if (is_user && !(attrs & (1 << 4))) {
2961
/* Unprivileged access not enabled */
2964
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
2965
if (attrs & (1 << 12) || (!is_user && (attrs & (1 << 11)))) {
2967
if (access_type == 2) {
2970
*prot &= ~PAGE_EXEC;
2972
if (attrs & (1 << 5)) {
2973
/* Write access forbidden */
2974
if (access_type == 1) {
2977
*prot &= ~PAGE_WRITE;
2980
*phys_ptr = descaddr;
2981
*page_size_ptr = page_size;
2985
/* Long-descriptor format IFSR/DFSR value */
2986
return (1 << 9) | (fault_type << 2) | level;
2989
static int get_phys_addr_mpu(CPUARMState *env, uint32_t address,
2990
int access_type, int is_user,
2991
hwaddr *phys_ptr, int *prot)
2997
*phys_ptr = address;
2998
for (n = 7; n >= 0; n--) {
2999
base = env->cp15.c6_region[n];
3000
if ((base & 1) == 0)
3002
mask = 1 << ((base >> 1) & 0x1f);
3003
/* Keep this shift separate from the above to avoid an
3004
(undefined) << 32. */
3005
mask = (mask << 1) - 1;
3006
if (((base ^ address) & ~mask) == 0)
3012
if (access_type == 2) {
3013
mask = env->cp15.c5_insn;
3015
mask = env->cp15.c5_data;
3017
mask = (mask >> (n * 4)) & 0xf;
3024
*prot = PAGE_READ | PAGE_WRITE;
3029
*prot |= PAGE_WRITE;
3032
*prot = PAGE_READ | PAGE_WRITE;
3043
/* Bad permission. */
3050
/* get_phys_addr - get the physical address for this virtual address
3052
* Find the physical address corresponding to the given virtual address,
3053
* by doing a translation table walk on MMU based systems or using the
3054
* MPU state on MPU based systems.
3056
* Returns 0 if the translation was successful. Otherwise, phys_ptr,
3057
* prot and page_size are not filled in, and the return value provides
3058
* information on why the translation aborted, in the format of a
3059
* DFSR/IFSR fault register, with the following caveats:
3060
* * we honour the short vs long DFSR format differences.
3061
* * the WnR bit is never set (the caller must do this).
3062
* * for MPU based systems we don't bother to return a full FSR format
3066
* @address: virtual address to get physical address for
3067
* @access_type: 0 for read, 1 for write, 2 for execute
3068
* @is_user: 0 for privileged access, 1 for user
3069
* @phys_ptr: set to the physical address corresponding to the virtual address
3070
* @prot: set to the permissions for the page containing phys_ptr
3071
* @page_size: set to the size of the page containing phys_ptr
3073
static inline int get_phys_addr(CPUARMState *env, uint32_t address,
3074
int access_type, int is_user,
3075
hwaddr *phys_ptr, int *prot,
3076
target_ulong *page_size)
3078
/* Fast Context Switch Extension. */
3079
if (address < 0x02000000)
3080
address += env->cp15.c13_fcse;
3082
if ((env->cp15.c1_sys & 1) == 0) {
3083
/* MMU/MPU disabled. */
3084
*phys_ptr = address;
3085
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3086
*page_size = TARGET_PAGE_SIZE;
3088
} else if (arm_feature(env, ARM_FEATURE_MPU)) {
3089
*page_size = TARGET_PAGE_SIZE;
3090
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
3092
} else if (extended_addresses_enabled(env)) {
3093
return get_phys_addr_lpae(env, address, access_type, is_user, phys_ptr,
3095
} else if (env->cp15.c1_sys & (1 << 23)) {
3096
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
3099
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
3104
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address,
3105
int access_type, int mmu_idx)
3108
target_ulong page_size;
3112
is_user = mmu_idx == MMU_USER_IDX;
3113
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
3116
/* Map a single [sub]page. */
3117
phys_addr &= ~(hwaddr)0x3ff;
3118
address &= ~(uint32_t)0x3ff;
3119
tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size);
3123
if (access_type == 2) {
3124
env->cp15.c5_insn = ret;
3125
env->cp15.c6_insn = address;
3126
env->exception_index = EXCP_PREFETCH_ABORT;
3128
env->cp15.c5_data = ret;
3129
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6))
3130
env->cp15.c5_data |= (1 << 11);
3131
env->cp15.c6_data = address;
3132
env->exception_index = EXCP_DATA_ABORT;
3137
hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
3139
ARMCPU *cpu = ARM_CPU(cs);
3141
target_ulong page_size;
3145
ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size);
3154
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
3156
if ((env->uncached_cpsr & CPSR_M) == mode) {
3157
env->regs[13] = val;
3159
env->banked_r13[bank_number(mode)] = val;
3163
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
3165
if ((env->uncached_cpsr & CPSR_M) == mode) {
3166
return env->regs[13];
3168
return env->banked_r13[bank_number(mode)];
3172
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
3176
return xpsr_read(env) & 0xf8000000;
3178
return xpsr_read(env) & 0xf80001ff;
3180
return xpsr_read(env) & 0xff00fc00;
3182
return xpsr_read(env) & 0xff00fdff;
3184
return xpsr_read(env) & 0x000001ff;
3186
return xpsr_read(env) & 0x0700fc00;
3188
return xpsr_read(env) & 0x0700edff;
3190
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
3192
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
3193
case 16: /* PRIMASK */
3194
return (env->uncached_cpsr & CPSR_I) != 0;
3195
case 17: /* BASEPRI */
3196
case 18: /* BASEPRI_MAX */
3197
return env->v7m.basepri;
3198
case 19: /* FAULTMASK */
3199
return (env->uncached_cpsr & CPSR_F) != 0;
3200
case 20: /* CONTROL */
3201
return env->v7m.control;
3203
/* ??? For debugging only. */
3204
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
3209
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
3213
xpsr_write(env, val, 0xf8000000);
3216
xpsr_write(env, val, 0xf8000000);
3219
xpsr_write(env, val, 0xfe00fc00);
3222
xpsr_write(env, val, 0xfe00fc00);
3225
/* IPSR bits are readonly. */
3228
xpsr_write(env, val, 0x0600fc00);
3231
xpsr_write(env, val, 0x0600fc00);
3234
if (env->v7m.current_sp)
3235
env->v7m.other_sp = val;
3237
env->regs[13] = val;
3240
if (env->v7m.current_sp)
3241
env->regs[13] = val;
3243
env->v7m.other_sp = val;
3245
case 16: /* PRIMASK */
3247
env->uncached_cpsr |= CPSR_I;
3249
env->uncached_cpsr &= ~CPSR_I;
3251
case 17: /* BASEPRI */
3252
env->v7m.basepri = val & 0xff;
3254
case 18: /* BASEPRI_MAX */
3256
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
3257
env->v7m.basepri = val;
3259
case 19: /* FAULTMASK */
3261
env->uncached_cpsr |= CPSR_F;
3263
env->uncached_cpsr &= ~CPSR_F;
3265
case 20: /* CONTROL */
3266
env->v7m.control = val & 3;
3267
switch_v7m_sp(env, (val & 2) != 0);
3270
/* ??? For debugging only. */
3271
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
3278
/* Note that signed overflow is undefined in C. The following routines are
3279
careful to use unsigned types where modulo arithmetic is required.
3280
Failure to do so _will_ break on newer gcc. */
3282
/* Signed saturating arithmetic. */
3284
/* Perform 16-bit signed saturating addition. */
3285
static inline uint16_t add16_sat(uint16_t a, uint16_t b)
3290
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
3299
/* Perform 8-bit signed saturating addition. */
3300
static inline uint8_t add8_sat(uint8_t a, uint8_t b)
3305
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
3314
/* Perform 16-bit signed saturating subtraction. */
3315
static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
3320
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
3329
/* Perform 8-bit signed saturating subtraction. */
3330
static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
3335
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
3344
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
3345
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
3346
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
3347
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
3350
#include "op_addsub.h"
3352
/* Unsigned saturating arithmetic. */
3353
static inline uint16_t add16_usat(uint16_t a, uint16_t b)
3362
static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
3370
static inline uint8_t add8_usat(uint8_t a, uint8_t b)
3379
static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
3387
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
3388
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
3389
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
3390
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
3393
#include "op_addsub.h"
3395
/* Signed modulo arithmetic. */
3396
#define SARITH16(a, b, n, op) do { \
3398
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
3399
RESULT(sum, n, 16); \
3401
ge |= 3 << (n * 2); \
3404
#define SARITH8(a, b, n, op) do { \
3406
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
3407
RESULT(sum, n, 8); \
3413
#define ADD16(a, b, n) SARITH16(a, b, n, +)
3414
#define SUB16(a, b, n) SARITH16(a, b, n, -)
3415
#define ADD8(a, b, n) SARITH8(a, b, n, +)
3416
#define SUB8(a, b, n) SARITH8(a, b, n, -)
3420
#include "op_addsub.h"
3422
/* Unsigned modulo arithmetic. */
3423
#define ADD16(a, b, n) do { \
3425
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
3426
RESULT(sum, n, 16); \
3427
if ((sum >> 16) == 1) \
3428
ge |= 3 << (n * 2); \
3431
#define ADD8(a, b, n) do { \
3433
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
3434
RESULT(sum, n, 8); \
3435
if ((sum >> 8) == 1) \
3439
#define SUB16(a, b, n) do { \
3441
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
3442
RESULT(sum, n, 16); \
3443
if ((sum >> 16) == 0) \
3444
ge |= 3 << (n * 2); \
3447
#define SUB8(a, b, n) do { \
3449
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
3450
RESULT(sum, n, 8); \
3451
if ((sum >> 8) == 0) \
3458
#include "op_addsub.h"
3460
/* Halved signed arithmetic. */
3461
#define ADD16(a, b, n) \
3462
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
3463
#define SUB16(a, b, n) \
3464
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
3465
#define ADD8(a, b, n) \
3466
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
3467
#define SUB8(a, b, n) \
3468
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
3471
#include "op_addsub.h"
3473
/* Halved unsigned arithmetic. */
3474
#define ADD16(a, b, n) \
3475
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
3476
#define SUB16(a, b, n) \
3477
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
3478
#define ADD8(a, b, n) \
3479
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
3480
#define SUB8(a, b, n) \
3481
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
3484
#include "op_addsub.h"
3486
static inline uint8_t do_usad(uint8_t a, uint8_t b)
3494
/* Unsigned sum of absolute byte differences. */
3495
uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
3498
sum = do_usad(a, b);
3499
sum += do_usad(a >> 8, b >> 8);
3500
sum += do_usad(a >> 16, b >>16);
3501
sum += do_usad(a >> 24, b >> 24);
3505
/* For ARMv6 SEL instruction. */
3506
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
3519
return (a & mask) | (b & ~mask);
3522
/* VFP support. We follow the convention used for VFP instructions:
3523
Single precision routines have a "s" suffix, double precision a
3526
/* Convert host exception flags to vfp form. */
3527
static inline int vfp_exceptbits_from_host(int host_bits)
3529
int target_bits = 0;
3531
if (host_bits & float_flag_invalid)
3533
if (host_bits & float_flag_divbyzero)
3535
if (host_bits & float_flag_overflow)
3537
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
3539
if (host_bits & float_flag_inexact)
3540
target_bits |= 0x10;
3541
if (host_bits & float_flag_input_denormal)
3542
target_bits |= 0x80;
3546
uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
3551
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
3552
| (env->vfp.vec_len << 16)
3553
| (env->vfp.vec_stride << 20);
3554
i = get_float_exception_flags(&env->vfp.fp_status);
3555
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
3556
fpscr |= vfp_exceptbits_from_host(i);
3560
uint32_t vfp_get_fpscr(CPUARMState *env)
3562
return HELPER(vfp_get_fpscr)(env);
3565
/* Convert vfp exception flags to target form. */
3566
static inline int vfp_exceptbits_to_host(int target_bits)
3570
if (target_bits & 1)
3571
host_bits |= float_flag_invalid;
3572
if (target_bits & 2)
3573
host_bits |= float_flag_divbyzero;
3574
if (target_bits & 4)
3575
host_bits |= float_flag_overflow;
3576
if (target_bits & 8)
3577
host_bits |= float_flag_underflow;
3578
if (target_bits & 0x10)
3579
host_bits |= float_flag_inexact;
3580
if (target_bits & 0x80)
3581
host_bits |= float_flag_input_denormal;
3585
void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
3590
changed = env->vfp.xregs[ARM_VFP_FPSCR];
3591
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
3592
env->vfp.vec_len = (val >> 16) & 7;
3593
env->vfp.vec_stride = (val >> 20) & 3;
3596
if (changed & (3 << 22)) {
3597
i = (val >> 22) & 3;
3600
i = float_round_nearest_even;
3606
i = float_round_down;
3609
i = float_round_to_zero;
3612
set_float_rounding_mode(i, &env->vfp.fp_status);
3614
if (changed & (1 << 24)) {
3615
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
3616
set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
3618
if (changed & (1 << 25))
3619
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
3621
i = vfp_exceptbits_to_host(val);
3622
set_float_exception_flags(i, &env->vfp.fp_status);
3623
set_float_exception_flags(0, &env->vfp.standard_fp_status);
3626
void vfp_set_fpscr(CPUARMState *env, uint32_t val)
3628
HELPER(vfp_set_fpscr)(env, val);
3631
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
3633
#define VFP_BINOP(name) \
3634
float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
3636
float_status *fpst = fpstp; \
3637
return float32_ ## name(a, b, fpst); \
3639
float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
3641
float_status *fpst = fpstp; \
3642
return float64_ ## name(a, b, fpst); \
3650
float32 VFP_HELPER(neg, s)(float32 a)
3652
return float32_chs(a);
3655
float64 VFP_HELPER(neg, d)(float64 a)
3657
return float64_chs(a);
3660
float32 VFP_HELPER(abs, s)(float32 a)
3662
return float32_abs(a);
3665
float64 VFP_HELPER(abs, d)(float64 a)
3667
return float64_abs(a);
3670
float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env)
3672
return float32_sqrt(a, &env->vfp.fp_status);
3675
float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env)
3677
return float64_sqrt(a, &env->vfp.fp_status);
3680
/* XXX: check quiet/signaling case */
3681
#define DO_VFP_cmp(p, type) \
3682
void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
3685
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
3686
case 0: flags = 0x6; break; \
3687
case -1: flags = 0x8; break; \
3688
case 1: flags = 0x2; break; \
3689
default: case 2: flags = 0x3; break; \
3691
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
3692
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
3694
void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
3697
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
3698
case 0: flags = 0x6; break; \
3699
case -1: flags = 0x8; break; \
3700
case 1: flags = 0x2; break; \
3701
default: case 2: flags = 0x3; break; \
3703
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
3704
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
3706
DO_VFP_cmp(s, float32)
3707
DO_VFP_cmp(d, float64)
3710
/* Integer to float and float to integer conversions */
3712
#define CONV_ITOF(name, fsz, sign) \
3713
float##fsz HELPER(name)(uint32_t x, void *fpstp) \
3715
float_status *fpst = fpstp; \
3716
return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
3719
#define CONV_FTOI(name, fsz, sign, round) \
3720
uint32_t HELPER(name)(float##fsz x, void *fpstp) \
3722
float_status *fpst = fpstp; \
3723
if (float##fsz##_is_any_nan(x)) { \
3724
float_raise(float_flag_invalid, fpst); \
3727
return float##fsz##_to_##sign##int32##round(x, fpst); \
3730
#define FLOAT_CONVS(name, p, fsz, sign) \
3731
CONV_ITOF(vfp_##name##to##p, fsz, sign) \
3732
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
3733
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
3735
FLOAT_CONVS(si, s, 32, )
3736
FLOAT_CONVS(si, d, 64, )
3737
FLOAT_CONVS(ui, s, 32, u)
3738
FLOAT_CONVS(ui, d, 64, u)
3744
/* floating point conversion */
3745
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env)
3747
float64 r = float32_to_float64(x, &env->vfp.fp_status);
3748
/* ARM requires that S<->D conversion of any kind of NaN generates
3749
* a quiet NaN by forcing the most significant frac bit to 1.
3751
return float64_maybe_silence_nan(r);
3754
float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
3756
float32 r = float64_to_float32(x, &env->vfp.fp_status);
3757
/* ARM requires that S<->D conversion of any kind of NaN generates
3758
* a quiet NaN by forcing the most significant frac bit to 1.
3760
return float32_maybe_silence_nan(r);
3763
/* VFP3 fixed point conversion. */
3764
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
3765
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \
3768
float_status *fpst = fpstp; \
3770
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \
3771
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
3773
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
3776
float_status *fpst = fpstp; \
3778
if (float##fsz##_is_any_nan(x)) { \
3779
float_raise(float_flag_invalid, fpst); \
3782
tmp = float##fsz##_scalbn(x, shift, fpst); \
3783
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \
3786
VFP_CONV_FIX(sh, d, 64, int16, )
3787
VFP_CONV_FIX(sl, d, 64, int32, )
3788
VFP_CONV_FIX(uh, d, 64, uint16, u)
3789
VFP_CONV_FIX(ul, d, 64, uint32, u)
3790
VFP_CONV_FIX(sh, s, 32, int16, )
3791
VFP_CONV_FIX(sl, s, 32, int32, )
3792
VFP_CONV_FIX(uh, s, 32, uint16, u)
3793
VFP_CONV_FIX(ul, s, 32, uint32, u)
3796
/* Half precision conversions. */
3797
static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
3799
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
3800
float32 r = float16_to_float32(make_float16(a), ieee, s);
3802
return float32_maybe_silence_nan(r);
3807
static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
3809
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
3810
float16 r = float32_to_float16(a, ieee, s);
3812
r = float16_maybe_silence_nan(r);
3814
return float16_val(r);
3817
float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
3819
return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
3822
uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
3824
return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
3827
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
3829
return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
3832
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
3834
return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
3837
#define float32_two make_float32(0x40000000)
3838
#define float32_three make_float32(0x40400000)
3839
#define float32_one_point_five make_float32(0x3fc00000)
3841
float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env)
3843
float_status *s = &env->vfp.standard_fp_status;
3844
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
3845
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
3846
if (!(float32_is_zero(a) || float32_is_zero(b))) {
3847
float_raise(float_flag_input_denormal, s);
3851
return float32_sub(float32_two, float32_mul(a, b, s), s);
3854
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
3856
float_status *s = &env->vfp.standard_fp_status;
3858
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
3859
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
3860
if (!(float32_is_zero(a) || float32_is_zero(b))) {
3861
float_raise(float_flag_input_denormal, s);
3863
return float32_one_point_five;
3865
product = float32_mul(a, b, s);
3866
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
3871
/* Constants 256 and 512 are used in some helpers; we avoid relying on
3872
* int->float conversions at run-time. */
3873
#define float64_256 make_float64(0x4070000000000000LL)
3874
#define float64_512 make_float64(0x4080000000000000LL)
3876
/* The algorithm that must be used to calculate the estimate
3877
* is specified by the ARM ARM.
3879
static float64 recip_estimate(float64 a, CPUARMState *env)
3881
/* These calculations mustn't set any fp exception flags,
3882
* so we use a local copy of the fp_status.
3884
float_status dummy_status = env->vfp.standard_fp_status;
3885
float_status *s = &dummy_status;
3886
/* q = (int)(a * 512.0) */
3887
float64 q = float64_mul(float64_512, a, s);
3888
int64_t q_int = float64_to_int64_round_to_zero(q, s);
3890
/* r = 1.0 / (((double)q + 0.5) / 512.0) */
3891
q = int64_to_float64(q_int, s);
3892
q = float64_add(q, float64_half, s);
3893
q = float64_div(q, float64_512, s);
3894
q = float64_div(float64_one, q, s);
3896
/* s = (int)(256.0 * r + 0.5) */
3897
q = float64_mul(q, float64_256, s);
3898
q = float64_add(q, float64_half, s);
3899
q_int = float64_to_int64_round_to_zero(q, s);
3901
/* return (double)s / 256.0 */
3902
return float64_div(int64_to_float64(q_int, s), float64_256, s);
3905
float32 HELPER(recpe_f32)(float32 a, CPUARMState *env)
3907
float_status *s = &env->vfp.standard_fp_status;
3909
uint32_t val32 = float32_val(a);
3912
int a_exp = (val32 & 0x7f800000) >> 23;
3913
int sign = val32 & 0x80000000;
3915
if (float32_is_any_nan(a)) {
3916
if (float32_is_signaling_nan(a)) {
3917
float_raise(float_flag_invalid, s);
3919
return float32_default_nan;
3920
} else if (float32_is_infinity(a)) {
3921
return float32_set_sign(float32_zero, float32_is_neg(a));
3922
} else if (float32_is_zero_or_denormal(a)) {
3923
if (!float32_is_zero(a)) {
3924
float_raise(float_flag_input_denormal, s);
3926
float_raise(float_flag_divbyzero, s);
3927
return float32_set_sign(float32_infinity, float32_is_neg(a));
3928
} else if (a_exp >= 253) {
3929
float_raise(float_flag_underflow, s);
3930
return float32_set_sign(float32_zero, float32_is_neg(a));
3933
f64 = make_float64((0x3feULL << 52)
3934
| ((int64_t)(val32 & 0x7fffff) << 29));
3936
result_exp = 253 - a_exp;
3938
f64 = recip_estimate(f64, env);
3941
| ((result_exp & 0xff) << 23)
3942
| ((float64_val(f64) >> 29) & 0x7fffff);
3943
return make_float32(val32);
3946
/* The algorithm that must be used to calculate the estimate
3947
* is specified by the ARM ARM.
3949
static float64 recip_sqrt_estimate(float64 a, CPUARMState *env)
3951
/* These calculations mustn't set any fp exception flags,
3952
* so we use a local copy of the fp_status.
3954
float_status dummy_status = env->vfp.standard_fp_status;
3955
float_status *s = &dummy_status;
3959
if (float64_lt(a, float64_half, s)) {
3960
/* range 0.25 <= a < 0.5 */
3962
/* a in units of 1/512 rounded down */
3963
/* q0 = (int)(a * 512.0); */
3964
q = float64_mul(float64_512, a, s);
3965
q_int = float64_to_int64_round_to_zero(q, s);
3967
/* reciprocal root r */
3968
/* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
3969
q = int64_to_float64(q_int, s);
3970
q = float64_add(q, float64_half, s);
3971
q = float64_div(q, float64_512, s);
3972
q = float64_sqrt(q, s);
3973
q = float64_div(float64_one, q, s);
3975
/* range 0.5 <= a < 1.0 */
3977
/* a in units of 1/256 rounded down */
3978
/* q1 = (int)(a * 256.0); */
3979
q = float64_mul(float64_256, a, s);
3980
int64_t q_int = float64_to_int64_round_to_zero(q, s);
3982
/* reciprocal root r */
3983
/* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
3984
q = int64_to_float64(q_int, s);
3985
q = float64_add(q, float64_half, s);
3986
q = float64_div(q, float64_256, s);
3987
q = float64_sqrt(q, s);
3988
q = float64_div(float64_one, q, s);
3990
/* r in units of 1/256 rounded to nearest */
3991
/* s = (int)(256.0 * r + 0.5); */
3993
q = float64_mul(q, float64_256,s );
3994
q = float64_add(q, float64_half, s);
3995
q_int = float64_to_int64_round_to_zero(q, s);
3997
/* return (double)s / 256.0;*/
3998
return float64_div(int64_to_float64(q_int, s), float64_256, s);
4001
float32 HELPER(rsqrte_f32)(float32 a, CPUARMState *env)
4003
float_status *s = &env->vfp.standard_fp_status;
4009
val = float32_val(a);
4011
if (float32_is_any_nan(a)) {
4012
if (float32_is_signaling_nan(a)) {
4013
float_raise(float_flag_invalid, s);
4015
return float32_default_nan;
4016
} else if (float32_is_zero_or_denormal(a)) {
4017
if (!float32_is_zero(a)) {
4018
float_raise(float_flag_input_denormal, s);
4020
float_raise(float_flag_divbyzero, s);
4021
return float32_set_sign(float32_infinity, float32_is_neg(a));
4022
} else if (float32_is_neg(a)) {
4023
float_raise(float_flag_invalid, s);
4024
return float32_default_nan;
4025
} else if (float32_is_infinity(a)) {
4026
return float32_zero;
4029
/* Normalize to a double-precision value between 0.25 and 1.0,
4030
* preserving the parity of the exponent. */
4031
if ((val & 0x800000) == 0) {
4032
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
4034
| ((uint64_t)(val & 0x7fffff) << 29));
4036
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
4038
| ((uint64_t)(val & 0x7fffff) << 29));
4041
result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2;
4043
f64 = recip_sqrt_estimate(f64, env);
4045
val64 = float64_val(f64);
4047
val = ((result_exp & 0xff) << 23)
4048
| ((val64 >> 29) & 0x7fffff);
4049
return make_float32(val);
4052
uint32_t HELPER(recpe_u32)(uint32_t a, CPUARMState *env)
4056
if ((a & 0x80000000) == 0) {
4060
f64 = make_float64((0x3feULL << 52)
4061
| ((int64_t)(a & 0x7fffffff) << 21));
4063
f64 = recip_estimate (f64, env);
4065
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
4068
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUARMState *env)
4072
if ((a & 0xc0000000) == 0) {
4076
if (a & 0x80000000) {
4077
f64 = make_float64((0x3feULL << 52)
4078
| ((uint64_t)(a & 0x7fffffff) << 21));
4079
} else { /* bits 31-30 == '01' */
4080
f64 = make_float64((0x3fdULL << 52)
4081
| ((uint64_t)(a & 0x3fffffff) << 22));
4084
f64 = recip_sqrt_estimate(f64, env);
4086
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
4089
/* VFPv4 fused multiply-accumulate */
4090
float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
4092
float_status *fpst = fpstp;
4093
return float32_muladd(a, b, c, 0, fpst);
4096
float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
4098
float_status *fpst = fpstp;
4099
return float64_muladd(a, b, c, 0, fpst);