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 = "VBAR", .cp = 15, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
639
.access = PL1_RW, .writefn = vbar_write,
640
.fieldoffset = offsetof(CPUARMState, cp15.c12_vbar),
642
{ .name = "SCR", .cp = 15, .crn = 1, .crm = 1, .opc1 = 0, .opc2 = 0,
643
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_scr),
645
{ .name = "CCSIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 0,
646
.access = PL1_R, .readfn = ccsidr_read, .type = ARM_CP_NO_MIGRATE },
647
{ .name = "CSSELR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 2, .opc2 = 0,
648
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c0_cssel),
649
.writefn = csselr_write, .resetvalue = 0 },
650
/* Auxiliary ID register: this actually has an IMPDEF value but for now
651
* just RAZ for all cores:
653
{ .name = "AIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 7,
654
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
658
static int teecr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
665
static int teehbr_read(CPUARMState *env, const ARMCPRegInfo *ri,
668
/* This is a helper function because the user access rights
669
* depend on the value of the TEECR.
671
if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
674
*value = env->teehbr;
678
static int teehbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
681
if (arm_current_pl(env) == 0 && (env->teecr & 1)) {
688
static const ARMCPRegInfo t2ee_cp_reginfo[] = {
689
{ .name = "TEECR", .cp = 14, .crn = 0, .crm = 0, .opc1 = 6, .opc2 = 0,
690
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, teecr),
692
.writefn = teecr_write },
693
{ .name = "TEEHBR", .cp = 14, .crn = 1, .crm = 0, .opc1 = 6, .opc2 = 0,
694
.access = PL0_RW, .fieldoffset = offsetof(CPUARMState, teehbr),
695
.resetvalue = 0, .raw_readfn = raw_read, .raw_writefn = raw_write,
696
.readfn = teehbr_read, .writefn = teehbr_write },
700
static const ARMCPRegInfo v6k_cp_reginfo[] = {
701
{ .name = "TPIDRURW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 2,
703
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls1),
705
{ .name = "TPIDRURO", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 3,
706
.access = PL0_R|PL1_W,
707
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls2),
709
{ .name = "TPIDRPRW", .cp = 15, .crn = 13, .crm = 0, .opc1 = 0, .opc2 = 4,
711
.fieldoffset = offsetof(CPUARMState, cp15.c13_tls3),
716
#ifndef CONFIG_USER_ONLY
718
static uint64_t gt_get_countervalue(CPUARMState *env)
720
return qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) / GTIMER_SCALE;
723
static void gt_recalc_timer(ARMCPU *cpu, int timeridx)
725
ARMGenericTimer *gt = &cpu->env.cp15.c14_timer[timeridx];
728
/* Timer enabled: calculate and set current ISTATUS, irq, and
729
* reset timer to when ISTATUS next has to change
731
uint64_t count = gt_get_countervalue(&cpu->env);
732
/* Note that this must be unsigned 64 bit arithmetic: */
733
int istatus = count >= gt->cval;
736
gt->ctl = deposit32(gt->ctl, 2, 1, istatus);
737
qemu_set_irq(cpu->gt_timer_outputs[timeridx],
738
(istatus && !(gt->ctl & 2)));
740
/* Next transition is when count rolls back over to zero */
741
nexttick = UINT64_MAX;
743
/* Next transition is when we hit cval */
746
/* Note that the desired next expiry time might be beyond the
747
* signed-64-bit range of a QEMUTimer -- in this case we just
748
* set the timer for as far in the future as possible. When the
749
* timer expires we will reset the timer for any remaining period.
751
if (nexttick > INT64_MAX / GTIMER_SCALE) {
752
nexttick = INT64_MAX / GTIMER_SCALE;
754
timer_mod(cpu->gt_timer[timeridx], nexttick);
756
/* Timer disabled: ISTATUS and timer output always clear */
758
qemu_set_irq(cpu->gt_timer_outputs[timeridx], 0);
759
timer_del(cpu->gt_timer[timeridx]);
763
static int gt_cntfrq_read(CPUARMState *env, const ARMCPRegInfo *ri,
766
/* Not visible from PL0 if both PL0PCTEN and PL0VCTEN are zero */
767
if (arm_current_pl(env) == 0 && !extract32(env->cp15.c14_cntkctl, 0, 2)) {
770
*value = env->cp15.c14_cntfrq;
774
static void gt_cnt_reset(CPUARMState *env, const ARMCPRegInfo *ri)
776
ARMCPU *cpu = arm_env_get_cpu(env);
777
int timeridx = ri->opc1 & 1;
779
timer_del(cpu->gt_timer[timeridx]);
782
static int gt_cnt_read(CPUARMState *env, const ARMCPRegInfo *ri,
785
int timeridx = ri->opc1 & 1;
787
if (arm_current_pl(env) == 0 &&
788
!extract32(env->cp15.c14_cntkctl, timeridx, 1)) {
791
*value = gt_get_countervalue(env);
795
static int gt_cval_read(CPUARMState *env, const ARMCPRegInfo *ri,
798
int timeridx = ri->opc1 & 1;
800
if (arm_current_pl(env) == 0 &&
801
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
804
*value = env->cp15.c14_timer[timeridx].cval;
808
static int gt_cval_write(CPUARMState *env, const ARMCPRegInfo *ri,
811
int timeridx = ri->opc1 & 1;
813
env->cp15.c14_timer[timeridx].cval = value;
814
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
817
static int gt_tval_read(CPUARMState *env, const ARMCPRegInfo *ri,
820
int timeridx = ri->crm & 1;
822
if (arm_current_pl(env) == 0 &&
823
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
826
*value = (uint32_t)(env->cp15.c14_timer[timeridx].cval -
827
gt_get_countervalue(env));
831
static int gt_tval_write(CPUARMState *env, const ARMCPRegInfo *ri,
834
int timeridx = ri->crm & 1;
836
env->cp15.c14_timer[timeridx].cval = gt_get_countervalue(env) +
837
+ sextract64(value, 0, 32);
838
gt_recalc_timer(arm_env_get_cpu(env), timeridx);
842
static int gt_ctl_read(CPUARMState *env, const ARMCPRegInfo *ri,
845
int timeridx = ri->crm & 1;
847
if (arm_current_pl(env) == 0 &&
848
!extract32(env->cp15.c14_cntkctl, 9 - timeridx, 1)) {
851
*value = env->cp15.c14_timer[timeridx].ctl;
855
static int gt_ctl_write(CPUARMState *env, const ARMCPRegInfo *ri,
858
ARMCPU *cpu = arm_env_get_cpu(env);
859
int timeridx = ri->crm & 1;
860
uint32_t oldval = env->cp15.c14_timer[timeridx].ctl;
862
env->cp15.c14_timer[timeridx].ctl = value & 3;
863
if ((oldval ^ value) & 1) {
865
gt_recalc_timer(cpu, timeridx);
866
} else if ((oldval & value) & 2) {
867
/* IMASK toggled: don't need to recalculate,
868
* just set the interrupt line based on ISTATUS
870
qemu_set_irq(cpu->gt_timer_outputs[timeridx],
871
(oldval & 4) && (value & 2));
876
void arm_gt_ptimer_cb(void *opaque)
878
ARMCPU *cpu = opaque;
880
gt_recalc_timer(cpu, GTIMER_PHYS);
883
void arm_gt_vtimer_cb(void *opaque)
885
ARMCPU *cpu = opaque;
887
gt_recalc_timer(cpu, GTIMER_VIRT);
890
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
891
/* Note that CNTFRQ is purely reads-as-written for the benefit
892
* of software; writing it doesn't actually change the timer frequency.
893
* Our reset value matches the fixed frequency we implement the timer at.
895
{ .name = "CNTFRQ", .cp = 15, .crn = 14, .crm = 0, .opc1 = 0, .opc2 = 0,
896
.access = PL1_RW | PL0_R,
897
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntfrq),
898
.resetvalue = (1000 * 1000 * 1000) / GTIMER_SCALE,
899
.readfn = gt_cntfrq_read, .raw_readfn = raw_read,
901
/* overall control: mostly access permissions */
902
{ .name = "CNTKCTL", .cp = 15, .crn = 14, .crm = 1, .opc1 = 0, .opc2 = 0,
904
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
907
/* per-timer control */
908
{ .name = "CNTP_CTL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 1,
909
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
910
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].ctl),
912
.readfn = gt_ctl_read, .writefn = gt_ctl_write,
913
.raw_readfn = raw_read, .raw_writefn = raw_write,
915
{ .name = "CNTV_CTL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 1,
916
.type = ARM_CP_IO, .access = PL1_RW | PL0_R,
917
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].ctl),
919
.readfn = gt_ctl_read, .writefn = gt_ctl_write,
920
.raw_readfn = raw_read, .raw_writefn = raw_write,
922
/* TimerValue views: a 32 bit downcounting view of the underlying state */
923
{ .name = "CNTP_TVAL", .cp = 15, .crn = 14, .crm = 2, .opc1 = 0, .opc2 = 0,
924
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
925
.readfn = gt_tval_read, .writefn = gt_tval_write,
927
{ .name = "CNTV_TVAL", .cp = 15, .crn = 14, .crm = 3, .opc1 = 0, .opc2 = 0,
928
.type = ARM_CP_NO_MIGRATE | ARM_CP_IO, .access = PL1_RW | PL0_R,
929
.readfn = gt_tval_read, .writefn = gt_tval_write,
931
/* The counter itself */
932
{ .name = "CNTPCT", .cp = 15, .crm = 14, .opc1 = 0,
933
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
934
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
936
{ .name = "CNTVCT", .cp = 15, .crm = 14, .opc1 = 1,
937
.access = PL0_R, .type = ARM_CP_64BIT | ARM_CP_NO_MIGRATE | ARM_CP_IO,
938
.readfn = gt_cnt_read, .resetfn = gt_cnt_reset,
940
/* Comparison value, indicating when the timer goes off */
941
{ .name = "CNTP_CVAL", .cp = 15, .crm = 14, .opc1 = 2,
942
.access = PL1_RW | PL0_R,
943
.type = ARM_CP_64BIT | ARM_CP_IO,
944
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_PHYS].cval),
946
.readfn = gt_cval_read, .writefn = gt_cval_write,
947
.raw_readfn = raw_read, .raw_writefn = raw_write,
949
{ .name = "CNTV_CVAL", .cp = 15, .crm = 14, .opc1 = 3,
950
.access = PL1_RW | PL0_R,
951
.type = ARM_CP_64BIT | ARM_CP_IO,
952
.fieldoffset = offsetof(CPUARMState, cp15.c14_timer[GTIMER_VIRT].cval),
954
.readfn = gt_cval_read, .writefn = gt_cval_write,
955
.raw_readfn = raw_read, .raw_writefn = raw_write,
961
/* In user-mode none of the generic timer registers are accessible,
962
* and their implementation depends on QEMU_CLOCK_VIRTUAL and qdev gpio outputs,
963
* so instead just don't register any of them.
965
static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
971
static int par_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
973
if (arm_feature(env, ARM_FEATURE_LPAE)) {
974
env->cp15.c7_par = value;
975
} else if (arm_feature(env, ARM_FEATURE_V7)) {
976
env->cp15.c7_par = value & 0xfffff6ff;
978
env->cp15.c7_par = value & 0xfffff1ff;
983
#ifndef CONFIG_USER_ONLY
984
/* get_phys_addr() isn't present for user-mode-only targets */
986
/* Return true if extended addresses are enabled, ie this is an
987
* LPAE implementation and we are using the long-descriptor translation
988
* table format because the TTBCR EAE bit is set.
990
static inline bool extended_addresses_enabled(CPUARMState *env)
992
return arm_feature(env, ARM_FEATURE_LPAE)
993
&& (env->cp15.c2_control & (1U << 31));
996
static int ats_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
999
target_ulong page_size;
1001
int ret, is_user = ri->opc2 & 2;
1002
int access_type = ri->opc2 & 1;
1005
/* Other states are only available with TrustZone */
1008
ret = get_phys_addr(env, value, access_type, is_user,
1009
&phys_addr, &prot, &page_size);
1010
if (extended_addresses_enabled(env)) {
1011
/* ret is a DFSR/IFSR value for the long descriptor
1012
* translation table format, but with WnR always clear.
1013
* Convert it to a 64-bit PAR.
1015
uint64_t par64 = (1 << 11); /* LPAE bit always set */
1017
par64 |= phys_addr & ~0xfffULL;
1018
/* We don't set the ATTR or SH fields in the PAR. */
1021
par64 |= (ret & 0x3f) << 1; /* FS */
1022
/* Note that S2WLK and FSTAGE are always zero, because we don't
1023
* implement virtualization and therefore there can't be a stage 2
1027
env->cp15.c7_par = par64;
1028
env->cp15.c7_par_hi = par64 >> 32;
1030
/* ret is a DFSR/IFSR value for the short descriptor
1031
* translation table format (with WnR always clear).
1032
* Convert it to a 32-bit PAR.
1035
/* We do not set any attribute bits in the PAR */
1036
if (page_size == (1 << 24)
1037
&& arm_feature(env, ARM_FEATURE_V7)) {
1038
env->cp15.c7_par = (phys_addr & 0xff000000) | 1 << 1;
1040
env->cp15.c7_par = phys_addr & 0xfffff000;
1043
env->cp15.c7_par = ((ret & (10 << 1)) >> 5) |
1044
((ret & (12 << 1)) >> 6) |
1045
((ret & 0xf) << 1) | 1;
1047
env->cp15.c7_par_hi = 0;
1053
static const ARMCPRegInfo vapa_cp_reginfo[] = {
1054
{ .name = "PAR", .cp = 15, .crn = 7, .crm = 4, .opc1 = 0, .opc2 = 0,
1055
.access = PL1_RW, .resetvalue = 0,
1056
.fieldoffset = offsetof(CPUARMState, cp15.c7_par),
1057
.writefn = par_write },
1058
#ifndef CONFIG_USER_ONLY
1059
{ .name = "ATS", .cp = 15, .crn = 7, .crm = 8, .opc1 = 0, .opc2 = CP_ANY,
1060
.access = PL1_W, .writefn = ats_write, .type = ARM_CP_NO_MIGRATE },
1065
/* Return basic MPU access permission bits. */
1066
static uint32_t simple_mpu_ap_bits(uint32_t val)
1073
for (i = 0; i < 16; i += 2) {
1074
ret |= (val >> i) & mask;
1080
/* Pad basic MPU access permission bits to extended format. */
1081
static uint32_t extended_mpu_ap_bits(uint32_t val)
1088
for (i = 0; i < 16; i += 2) {
1089
ret |= (val & mask) << i;
1095
static int pmsav5_data_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1098
env->cp15.c5_data = extended_mpu_ap_bits(value);
1102
static int pmsav5_data_ap_read(CPUARMState *env, const ARMCPRegInfo *ri,
1105
*value = simple_mpu_ap_bits(env->cp15.c5_data);
1109
static int pmsav5_insn_ap_write(CPUARMState *env, const ARMCPRegInfo *ri,
1112
env->cp15.c5_insn = extended_mpu_ap_bits(value);
1116
static int pmsav5_insn_ap_read(CPUARMState *env, const ARMCPRegInfo *ri,
1119
*value = simple_mpu_ap_bits(env->cp15.c5_insn);
1123
static int arm946_prbs_read(CPUARMState *env, const ARMCPRegInfo *ri,
1129
*value = env->cp15.c6_region[ri->crm];
1133
static int arm946_prbs_write(CPUARMState *env, const ARMCPRegInfo *ri,
1139
env->cp15.c6_region[ri->crm] = value;
1143
static const ARMCPRegInfo pmsav5_cp_reginfo[] = {
1144
{ .name = "DATA_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1145
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1146
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0,
1147
.readfn = pmsav5_data_ap_read, .writefn = pmsav5_data_ap_write, },
1148
{ .name = "INSN_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1149
.access = PL1_RW, .type = ARM_CP_NO_MIGRATE,
1150
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0,
1151
.readfn = pmsav5_insn_ap_read, .writefn = pmsav5_insn_ap_write, },
1152
{ .name = "DATA_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 2,
1154
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1155
{ .name = "INSN_EXT_AP", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 3,
1157
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1158
{ .name = "DCACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1160
.fieldoffset = offsetof(CPUARMState, cp15.c2_data), .resetvalue = 0, },
1161
{ .name = "ICACHE_CFG", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1163
.fieldoffset = offsetof(CPUARMState, cp15.c2_insn), .resetvalue = 0, },
1164
/* Protection region base and size registers */
1165
{ .name = "946_PRBS", .cp = 15, .crn = 6, .crm = CP_ANY, .opc1 = 0,
1166
.opc2 = CP_ANY, .access = PL1_RW,
1167
.readfn = arm946_prbs_read, .writefn = arm946_prbs_write, },
1171
static int vmsa_ttbcr_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1174
int maskshift = extract32(value, 0, 3);
1176
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1177
value &= ~((7 << 19) | (3 << 14) | (0xf << 3));
1181
/* Note that we always calculate c2_mask and c2_base_mask, but
1182
* they are only used for short-descriptor tables (ie if EAE is 0);
1183
* for long-descriptor tables the TTBCR fields are used differently
1184
* and the c2_mask and c2_base_mask values are meaningless.
1186
env->cp15.c2_control = value;
1187
env->cp15.c2_mask = ~(((uint32_t)0xffffffffu) >> maskshift);
1188
env->cp15.c2_base_mask = ~((uint32_t)0x3fffu >> maskshift);
1192
static int vmsa_ttbcr_write(CPUARMState *env, const ARMCPRegInfo *ri,
1195
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1196
/* With LPAE the TTBCR could result in a change of ASID
1197
* via the TTBCR.A1 bit, so do a TLB flush.
1201
return vmsa_ttbcr_raw_write(env, ri, value);
1204
static void vmsa_ttbcr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1206
env->cp15.c2_base_mask = 0xffffc000u;
1207
env->cp15.c2_control = 0;
1208
env->cp15.c2_mask = 0;
1211
static const ARMCPRegInfo vmsa_cp_reginfo[] = {
1212
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0,
1214
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1215
{ .name = "IFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 1,
1217
.fieldoffset = offsetof(CPUARMState, cp15.c5_insn), .resetvalue = 0, },
1218
{ .name = "TTBR0", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 0,
1220
.fieldoffset = offsetof(CPUARMState, cp15.c2_base0), .resetvalue = 0, },
1221
{ .name = "TTBR1", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 1,
1223
.fieldoffset = offsetof(CPUARMState, cp15.c2_base1), .resetvalue = 0, },
1224
{ .name = "TTBCR", .cp = 15, .crn = 2, .crm = 0, .opc1 = 0, .opc2 = 2,
1225
.access = PL1_RW, .writefn = vmsa_ttbcr_write,
1226
.resetfn = vmsa_ttbcr_reset, .raw_writefn = vmsa_ttbcr_raw_write,
1227
.fieldoffset = offsetof(CPUARMState, cp15.c2_control) },
1228
{ .name = "DFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 0,
1229
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c6_data),
1234
static int omap_ticonfig_write(CPUARMState *env, const ARMCPRegInfo *ri,
1237
env->cp15.c15_ticonfig = value & 0xe7;
1238
/* The OS_TYPE bit in this register changes the reported CPUID! */
1239
env->cp15.c0_cpuid = (value & (1 << 5)) ?
1240
ARM_CPUID_TI915T : ARM_CPUID_TI925T;
1244
static int omap_threadid_write(CPUARMState *env, const ARMCPRegInfo *ri,
1247
env->cp15.c15_threadid = value & 0xffff;
1251
static int omap_wfi_write(CPUARMState *env, const ARMCPRegInfo *ri,
1254
/* Wait-for-interrupt (deprecated) */
1255
cpu_interrupt(CPU(arm_env_get_cpu(env)), CPU_INTERRUPT_HALT);
1259
static int omap_cachemaint_write(CPUARMState *env, const ARMCPRegInfo *ri,
1262
/* On OMAP there are registers indicating the max/min index of dcache lines
1263
* containing a dirty line; cache flush operations have to reset these.
1265
env->cp15.c15_i_max = 0x000;
1266
env->cp15.c15_i_min = 0xff0;
1270
static const ARMCPRegInfo omap_cp_reginfo[] = {
1271
{ .name = "DFSR", .cp = 15, .crn = 5, .crm = CP_ANY,
1272
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW, .type = ARM_CP_OVERRIDE,
1273
.fieldoffset = offsetof(CPUARMState, cp15.c5_data), .resetvalue = 0, },
1274
{ .name = "", .cp = 15, .crn = 15, .crm = 0, .opc1 = 0, .opc2 = 0,
1275
.access = PL1_RW, .type = ARM_CP_NOP },
1276
{ .name = "TICONFIG", .cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0,
1278
.fieldoffset = offsetof(CPUARMState, cp15.c15_ticonfig), .resetvalue = 0,
1279
.writefn = omap_ticonfig_write },
1280
{ .name = "IMAX", .cp = 15, .crn = 15, .crm = 2, .opc1 = 0, .opc2 = 0,
1282
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_max), .resetvalue = 0, },
1283
{ .name = "IMIN", .cp = 15, .crn = 15, .crm = 3, .opc1 = 0, .opc2 = 0,
1284
.access = PL1_RW, .resetvalue = 0xff0,
1285
.fieldoffset = offsetof(CPUARMState, cp15.c15_i_min) },
1286
{ .name = "THREADID", .cp = 15, .crn = 15, .crm = 4, .opc1 = 0, .opc2 = 0,
1288
.fieldoffset = offsetof(CPUARMState, cp15.c15_threadid), .resetvalue = 0,
1289
.writefn = omap_threadid_write },
1290
{ .name = "TI925T_STATUS", .cp = 15, .crn = 15,
1291
.crm = 8, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1292
.type = ARM_CP_NO_MIGRATE,
1293
.readfn = arm_cp_read_zero, .writefn = omap_wfi_write, },
1294
/* TODO: Peripheral port remap register:
1295
* On OMAP2 mcr p15, 0, rn, c15, c2, 4 sets up the interrupt controller
1296
* base address at $rn & ~0xfff and map size of 0x200 << ($rn & 0xfff),
1299
{ .name = "OMAP_CACHEMAINT", .cp = 15, .crn = 7, .crm = CP_ANY,
1300
.opc1 = 0, .opc2 = CP_ANY, .access = PL1_W,
1301
.type = ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE,
1302
.writefn = omap_cachemaint_write },
1303
{ .name = "C9", .cp = 15, .crn = 9,
1304
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_RW,
1305
.type = ARM_CP_CONST | ARM_CP_OVERRIDE, .resetvalue = 0 },
1309
static int xscale_cpar_write(CPUARMState *env, const ARMCPRegInfo *ri,
1313
if (env->cp15.c15_cpar != value) {
1314
/* Changes cp0 to cp13 behavior, so needs a TB flush. */
1316
env->cp15.c15_cpar = value;
1321
static const ARMCPRegInfo xscale_cp_reginfo[] = {
1322
{ .name = "XSCALE_CPAR",
1323
.cp = 15, .crn = 15, .crm = 1, .opc1 = 0, .opc2 = 0, .access = PL1_RW,
1324
.fieldoffset = offsetof(CPUARMState, cp15.c15_cpar), .resetvalue = 0,
1325
.writefn = xscale_cpar_write, },
1326
{ .name = "XSCALE_AUXCR",
1327
.cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1, .access = PL1_RW,
1328
.fieldoffset = offsetof(CPUARMState, cp15.c1_xscaleauxcr),
1333
static const ARMCPRegInfo dummy_c15_cp_reginfo[] = {
1334
/* RAZ/WI the whole crn=15 space, when we don't have a more specific
1335
* implementation of this implementation-defined space.
1336
* Ideally this should eventually disappear in favour of actually
1337
* implementing the correct behaviour for all cores.
1339
{ .name = "C15_IMPDEF", .cp = 15, .crn = 15,
1340
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1341
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1346
static const ARMCPRegInfo cache_dirty_status_cp_reginfo[] = {
1347
/* Cache status: RAZ because we have no cache so it's always clean */
1348
{ .name = "CDSR", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 6,
1349
.access = PL1_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1354
static const ARMCPRegInfo cache_block_ops_cp_reginfo[] = {
1355
/* We never have a a block transfer operation in progress */
1356
{ .name = "BXSR", .cp = 15, .crn = 7, .crm = 12, .opc1 = 0, .opc2 = 4,
1357
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1359
/* The cache ops themselves: these all NOP for QEMU */
1360
{ .name = "IICR", .cp = 15, .crm = 5, .opc1 = 0,
1361
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1362
{ .name = "IDCR", .cp = 15, .crm = 6, .opc1 = 0,
1363
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1364
{ .name = "CDCR", .cp = 15, .crm = 12, .opc1 = 0,
1365
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1366
{ .name = "PIR", .cp = 15, .crm = 12, .opc1 = 1,
1367
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1368
{ .name = "PDR", .cp = 15, .crm = 12, .opc1 = 2,
1369
.access = PL0_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1370
{ .name = "CIDCR", .cp = 15, .crm = 14, .opc1 = 0,
1371
.access = PL1_W, .type = ARM_CP_NOP|ARM_CP_64BIT },
1375
static const ARMCPRegInfo cache_test_clean_cp_reginfo[] = {
1376
/* The cache test-and-clean instructions always return (1 << 30)
1377
* to indicate that there are no dirty cache lines.
1379
{ .name = "TC_DCACHE", .cp = 15, .crn = 7, .crm = 10, .opc1 = 0, .opc2 = 3,
1380
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1381
.resetvalue = (1 << 30) },
1382
{ .name = "TCI_DCACHE", .cp = 15, .crn = 7, .crm = 14, .opc1 = 0, .opc2 = 3,
1383
.access = PL0_R, .type = ARM_CP_CONST | ARM_CP_NO_MIGRATE,
1384
.resetvalue = (1 << 30) },
1388
static const ARMCPRegInfo strongarm_cp_reginfo[] = {
1389
/* Ignore ReadBuffer accesses */
1390
{ .name = "C9_READBUFFER", .cp = 15, .crn = 9,
1391
.crm = CP_ANY, .opc1 = CP_ANY, .opc2 = CP_ANY,
1392
.access = PL1_RW, .resetvalue = 0,
1393
.type = ARM_CP_CONST | ARM_CP_OVERRIDE | ARM_CP_NO_MIGRATE },
1397
static int mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri,
1400
CPUState *cs = CPU(arm_env_get_cpu(env));
1401
uint32_t mpidr = cs->cpu_index;
1402
/* We don't support setting cluster ID ([8..11])
1403
* so these bits always RAZ.
1405
if (arm_feature(env, ARM_FEATURE_V7MP)) {
1406
mpidr |= (1U << 31);
1407
/* Cores which are uniprocessor (non-coherent)
1408
* but still implement the MP extensions set
1409
* bit 30. (For instance, A9UP.) However we do
1410
* not currently model any of those cores.
1417
static const ARMCPRegInfo mpidr_cp_reginfo[] = {
1418
{ .name = "MPIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 5,
1419
.access = PL1_R, .readfn = mpidr_read, .type = ARM_CP_NO_MIGRATE },
1423
static int par64_read(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value)
1425
*value = ((uint64_t)env->cp15.c7_par_hi << 32) | env->cp15.c7_par;
1429
static int par64_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1431
env->cp15.c7_par_hi = value >> 32;
1432
env->cp15.c7_par = value;
1436
static void par64_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1438
env->cp15.c7_par_hi = 0;
1439
env->cp15.c7_par = 0;
1442
static int ttbr064_read(CPUARMState *env, const ARMCPRegInfo *ri,
1445
*value = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
1449
static int ttbr064_raw_write(CPUARMState *env, const ARMCPRegInfo *ri,
1452
env->cp15.c2_base0_hi = value >> 32;
1453
env->cp15.c2_base0 = value;
1457
static int ttbr064_write(CPUARMState *env, const ARMCPRegInfo *ri,
1460
/* Writes to the 64 bit format TTBRs may change the ASID */
1462
return ttbr064_raw_write(env, ri, value);
1465
static void ttbr064_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1467
env->cp15.c2_base0_hi = 0;
1468
env->cp15.c2_base0 = 0;
1471
static int ttbr164_read(CPUARMState *env, const ARMCPRegInfo *ri,
1474
*value = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
1478
static int ttbr164_write(CPUARMState *env, const ARMCPRegInfo *ri,
1481
env->cp15.c2_base1_hi = value >> 32;
1482
env->cp15.c2_base1 = value;
1486
static void ttbr164_reset(CPUARMState *env, const ARMCPRegInfo *ri)
1488
env->cp15.c2_base1_hi = 0;
1489
env->cp15.c2_base1 = 0;
1492
static const ARMCPRegInfo lpae_cp_reginfo[] = {
1493
/* NOP AMAIR0/1: the override is because these clash with the rather
1494
* broadly specified TLB_LOCKDOWN entry in the generic cp_reginfo.
1496
{ .name = "AMAIR0", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
1497
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1499
{ .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
1500
.access = PL1_RW, .type = ARM_CP_CONST | ARM_CP_OVERRIDE,
1502
/* 64 bit access versions of the (dummy) debug registers */
1503
{ .name = "DBGDRAR", .cp = 14, .crm = 1, .opc1 = 0,
1504
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1505
{ .name = "DBGDSAR", .cp = 14, .crm = 2, .opc1 = 0,
1506
.access = PL0_R, .type = ARM_CP_CONST|ARM_CP_64BIT, .resetvalue = 0 },
1507
{ .name = "PAR", .cp = 15, .crm = 7, .opc1 = 0,
1508
.access = PL1_RW, .type = ARM_CP_64BIT,
1509
.readfn = par64_read, .writefn = par64_write, .resetfn = par64_reset },
1510
{ .name = "TTBR0", .cp = 15, .crm = 2, .opc1 = 0,
1511
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr064_read,
1512
.writefn = ttbr064_write, .raw_writefn = ttbr064_raw_write,
1513
.resetfn = ttbr064_reset },
1514
{ .name = "TTBR1", .cp = 15, .crm = 2, .opc1 = 1,
1515
.access = PL1_RW, .type = ARM_CP_64BIT, .readfn = ttbr164_read,
1516
.writefn = ttbr164_write, .resetfn = ttbr164_reset },
1520
static int sctlr_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
1522
env->cp15.c1_sys = value;
1523
/* ??? Lots of these bits are not implemented. */
1524
/* This may enable/disable the MMU, so do a TLB flush. */
1529
void register_cp_regs_for_features(ARMCPU *cpu)
1531
/* Register all the coprocessor registers based on feature bits */
1532
CPUARMState *env = &cpu->env;
1533
if (arm_feature(env, ARM_FEATURE_M)) {
1534
/* M profile has no coprocessor registers */
1538
define_arm_cp_regs(cpu, cp_reginfo);
1539
if (arm_feature(env, ARM_FEATURE_V6)) {
1540
/* The ID registers all have impdef reset values */
1541
ARMCPRegInfo v6_idregs[] = {
1542
{ .name = "ID_PFR0", .cp = 15, .crn = 0, .crm = 1,
1543
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1544
.resetvalue = cpu->id_pfr0 },
1545
{ .name = "ID_PFR1", .cp = 15, .crn = 0, .crm = 1,
1546
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1547
.resetvalue = cpu->id_pfr1 },
1548
{ .name = "ID_DFR0", .cp = 15, .crn = 0, .crm = 1,
1549
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1550
.resetvalue = cpu->id_dfr0 },
1551
{ .name = "ID_AFR0", .cp = 15, .crn = 0, .crm = 1,
1552
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1553
.resetvalue = cpu->id_afr0 },
1554
{ .name = "ID_MMFR0", .cp = 15, .crn = 0, .crm = 1,
1555
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1556
.resetvalue = cpu->id_mmfr0 },
1557
{ .name = "ID_MMFR1", .cp = 15, .crn = 0, .crm = 1,
1558
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1559
.resetvalue = cpu->id_mmfr1 },
1560
{ .name = "ID_MMFR2", .cp = 15, .crn = 0, .crm = 1,
1561
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1562
.resetvalue = cpu->id_mmfr2 },
1563
{ .name = "ID_MMFR3", .cp = 15, .crn = 0, .crm = 1,
1564
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1565
.resetvalue = cpu->id_mmfr3 },
1566
{ .name = "ID_ISAR0", .cp = 15, .crn = 0, .crm = 2,
1567
.opc1 = 0, .opc2 = 0, .access = PL1_R, .type = ARM_CP_CONST,
1568
.resetvalue = cpu->id_isar0 },
1569
{ .name = "ID_ISAR1", .cp = 15, .crn = 0, .crm = 2,
1570
.opc1 = 0, .opc2 = 1, .access = PL1_R, .type = ARM_CP_CONST,
1571
.resetvalue = cpu->id_isar1 },
1572
{ .name = "ID_ISAR2", .cp = 15, .crn = 0, .crm = 2,
1573
.opc1 = 0, .opc2 = 2, .access = PL1_R, .type = ARM_CP_CONST,
1574
.resetvalue = cpu->id_isar2 },
1575
{ .name = "ID_ISAR3", .cp = 15, .crn = 0, .crm = 2,
1576
.opc1 = 0, .opc2 = 3, .access = PL1_R, .type = ARM_CP_CONST,
1577
.resetvalue = cpu->id_isar3 },
1578
{ .name = "ID_ISAR4", .cp = 15, .crn = 0, .crm = 2,
1579
.opc1 = 0, .opc2 = 4, .access = PL1_R, .type = ARM_CP_CONST,
1580
.resetvalue = cpu->id_isar4 },
1581
{ .name = "ID_ISAR5", .cp = 15, .crn = 0, .crm = 2,
1582
.opc1 = 0, .opc2 = 5, .access = PL1_R, .type = ARM_CP_CONST,
1583
.resetvalue = cpu->id_isar5 },
1584
/* 6..7 are as yet unallocated and must RAZ */
1585
{ .name = "ID_ISAR6", .cp = 15, .crn = 0, .crm = 2,
1586
.opc1 = 0, .opc2 = 6, .access = PL1_R, .type = ARM_CP_CONST,
1588
{ .name = "ID_ISAR7", .cp = 15, .crn = 0, .crm = 2,
1589
.opc1 = 0, .opc2 = 7, .access = PL1_R, .type = ARM_CP_CONST,
1593
define_arm_cp_regs(cpu, v6_idregs);
1594
define_arm_cp_regs(cpu, v6_cp_reginfo);
1596
define_arm_cp_regs(cpu, not_v6_cp_reginfo);
1598
if (arm_feature(env, ARM_FEATURE_V6K)) {
1599
define_arm_cp_regs(cpu, v6k_cp_reginfo);
1601
if (arm_feature(env, ARM_FEATURE_V7)) {
1602
/* v7 performance monitor control register: same implementor
1603
* field as main ID register, and we implement no event counters.
1605
ARMCPRegInfo pmcr = {
1606
.name = "PMCR", .cp = 15, .crn = 9, .crm = 12, .opc1 = 0, .opc2 = 0,
1607
.access = PL0_RW, .resetvalue = cpu->midr & 0xff000000,
1608
.fieldoffset = offsetof(CPUARMState, cp15.c9_pmcr),
1609
.readfn = pmreg_read, .writefn = pmcr_write,
1610
.raw_readfn = raw_read, .raw_writefn = raw_write,
1612
ARMCPRegInfo clidr = {
1613
.name = "CLIDR", .cp = 15, .crn = 0, .crm = 0, .opc1 = 1, .opc2 = 1,
1614
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->clidr
1616
define_one_arm_cp_reg(cpu, &pmcr);
1617
define_one_arm_cp_reg(cpu, &clidr);
1618
define_arm_cp_regs(cpu, v7_cp_reginfo);
1620
define_arm_cp_regs(cpu, not_v7_cp_reginfo);
1622
if (arm_feature(env, ARM_FEATURE_MPU)) {
1623
/* These are the MPU registers prior to PMSAv6. Any new
1624
* PMSA core later than the ARM946 will require that we
1625
* implement the PMSAv6 or PMSAv7 registers, which are
1626
* completely different.
1628
assert(!arm_feature(env, ARM_FEATURE_V6));
1629
define_arm_cp_regs(cpu, pmsav5_cp_reginfo);
1631
define_arm_cp_regs(cpu, vmsa_cp_reginfo);
1633
if (arm_feature(env, ARM_FEATURE_THUMB2EE)) {
1634
define_arm_cp_regs(cpu, t2ee_cp_reginfo);
1636
if (arm_feature(env, ARM_FEATURE_GENERIC_TIMER)) {
1637
define_arm_cp_regs(cpu, generic_timer_cp_reginfo);
1639
if (arm_feature(env, ARM_FEATURE_VAPA)) {
1640
define_arm_cp_regs(cpu, vapa_cp_reginfo);
1642
if (arm_feature(env, ARM_FEATURE_CACHE_TEST_CLEAN)) {
1643
define_arm_cp_regs(cpu, cache_test_clean_cp_reginfo);
1645
if (arm_feature(env, ARM_FEATURE_CACHE_DIRTY_REG)) {
1646
define_arm_cp_regs(cpu, cache_dirty_status_cp_reginfo);
1648
if (arm_feature(env, ARM_FEATURE_CACHE_BLOCK_OPS)) {
1649
define_arm_cp_regs(cpu, cache_block_ops_cp_reginfo);
1651
if (arm_feature(env, ARM_FEATURE_OMAPCP)) {
1652
define_arm_cp_regs(cpu, omap_cp_reginfo);
1654
if (arm_feature(env, ARM_FEATURE_STRONGARM)) {
1655
define_arm_cp_regs(cpu, strongarm_cp_reginfo);
1657
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1658
define_arm_cp_regs(cpu, xscale_cp_reginfo);
1660
if (arm_feature(env, ARM_FEATURE_DUMMY_C15_REGS)) {
1661
define_arm_cp_regs(cpu, dummy_c15_cp_reginfo);
1663
if (arm_feature(env, ARM_FEATURE_LPAE)) {
1664
define_arm_cp_regs(cpu, lpae_cp_reginfo);
1666
/* Slightly awkwardly, the OMAP and StrongARM cores need all of
1667
* cp15 crn=0 to be writes-ignored, whereas for other cores they should
1668
* be read-only (ie write causes UNDEF exception).
1671
ARMCPRegInfo id_cp_reginfo[] = {
1672
/* Note that the MIDR isn't a simple constant register because
1673
* of the TI925 behaviour where writes to another register can
1674
* cause the MIDR value to change.
1676
* Unimplemented registers in the c15 0 0 0 space default to
1677
* MIDR. Define MIDR first as this entire space, then CTR, TCMTR
1678
* and friends override accordingly.
1681
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
1682
.access = PL1_R, .resetvalue = cpu->midr,
1683
.writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
1684
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
1685
.type = ARM_CP_OVERRIDE },
1687
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 1,
1688
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->ctr },
1690
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 2,
1691
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1693
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 3,
1694
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1695
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
1697
.cp = 15, .crn = 0, .crm = 3, .opc1 = 0, .opc2 = CP_ANY,
1698
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1700
.cp = 15, .crn = 0, .crm = 4, .opc1 = 0, .opc2 = CP_ANY,
1701
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1703
.cp = 15, .crn = 0, .crm = 5, .opc1 = 0, .opc2 = CP_ANY,
1704
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1706
.cp = 15, .crn = 0, .crm = 6, .opc1 = 0, .opc2 = CP_ANY,
1707
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1709
.cp = 15, .crn = 0, .crm = 7, .opc1 = 0, .opc2 = CP_ANY,
1710
.access = PL1_R, .type = ARM_CP_CONST, .resetvalue = 0 },
1713
ARMCPRegInfo crn0_wi_reginfo = {
1714
.name = "CRN0_WI", .cp = 15, .crn = 0, .crm = CP_ANY,
1715
.opc1 = CP_ANY, .opc2 = CP_ANY, .access = PL1_W,
1716
.type = ARM_CP_NOP | ARM_CP_OVERRIDE
1718
if (arm_feature(env, ARM_FEATURE_OMAPCP) ||
1719
arm_feature(env, ARM_FEATURE_STRONGARM)) {
1721
/* Register the blanket "writes ignored" value first to cover the
1722
* whole space. Then update the specific ID registers to allow write
1723
* access, so that they ignore writes rather than causing them to
1726
define_one_arm_cp_reg(cpu, &crn0_wi_reginfo);
1727
for (r = id_cp_reginfo; r->type != ARM_CP_SENTINEL; r++) {
1731
define_arm_cp_regs(cpu, id_cp_reginfo);
1734
if (arm_feature(env, ARM_FEATURE_MPIDR)) {
1735
define_arm_cp_regs(cpu, mpidr_cp_reginfo);
1738
if (arm_feature(env, ARM_FEATURE_AUXCR)) {
1739
ARMCPRegInfo auxcr = {
1740
.name = "AUXCR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 1,
1741
.access = PL1_RW, .type = ARM_CP_CONST,
1742
.resetvalue = cpu->reset_auxcr
1744
define_one_arm_cp_reg(cpu, &auxcr);
1747
/* Generic registers whose values depend on the implementation */
1749
ARMCPRegInfo sctlr = {
1750
.name = "SCTLR", .cp = 15, .crn = 1, .crm = 0, .opc1 = 0, .opc2 = 0,
1751
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.c1_sys),
1752
.writefn = sctlr_write, .resetvalue = cpu->reset_sctlr,
1753
.raw_writefn = raw_write,
1755
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
1756
/* Normally we would always end the TB on an SCTLR write, but Linux
1757
* arch/arm/mach-pxa/sleep.S expects two instructions following
1758
* an MMU enable to execute from cache. Imitate this behaviour.
1760
sctlr.type |= ARM_CP_SUPPRESS_TB_END;
1762
define_one_arm_cp_reg(cpu, &sctlr);
1766
ARMCPU *cpu_arm_init(const char *cpu_model)
1771
oc = cpu_class_by_name(TYPE_ARM_CPU, cpu_model);
1775
cpu = ARM_CPU(object_new(object_class_get_name(oc)));
1777
/* TODO this should be set centrally, once possible */
1778
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
1783
void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu)
1785
CPUState *cs = CPU(cpu);
1786
CPUARMState *env = &cpu->env;
1788
if (arm_feature(env, ARM_FEATURE_NEON)) {
1789
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1790
51, "arm-neon.xml", 0);
1791
} else if (arm_feature(env, ARM_FEATURE_VFP3)) {
1792
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1793
35, "arm-vfp3.xml", 0);
1794
} else if (arm_feature(env, ARM_FEATURE_VFP)) {
1795
gdb_register_coprocessor(cs, vfp_gdb_get_reg, vfp_gdb_set_reg,
1796
19, "arm-vfp.xml", 0);
1800
/* Sort alphabetically by type name, except for "any". */
1801
static gint arm_cpu_list_compare(gconstpointer a, gconstpointer b)
1803
ObjectClass *class_a = (ObjectClass *)a;
1804
ObjectClass *class_b = (ObjectClass *)b;
1805
const char *name_a, *name_b;
1807
name_a = object_class_get_name(class_a);
1808
name_b = object_class_get_name(class_b);
1809
if (strcmp(name_a, "any-" TYPE_ARM_CPU) == 0) {
1811
} else if (strcmp(name_b, "any-" TYPE_ARM_CPU) == 0) {
1814
return strcmp(name_a, name_b);
1818
static void arm_cpu_list_entry(gpointer data, gpointer user_data)
1820
ObjectClass *oc = data;
1821
CPUListState *s = user_data;
1822
const char *typename;
1825
typename = object_class_get_name(oc);
1826
name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_ARM_CPU));
1827
(*s->cpu_fprintf)(s->file, " %s\n",
1832
void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf)
1836
.cpu_fprintf = cpu_fprintf,
1840
list = object_class_get_list(TYPE_ARM_CPU, false);
1841
list = g_slist_sort(list, arm_cpu_list_compare);
1842
(*cpu_fprintf)(f, "Available CPUs:\n");
1843
g_slist_foreach(list, arm_cpu_list_entry, &s);
1847
static void arm_cpu_add_definition(gpointer data, gpointer user_data)
1849
ObjectClass *oc = data;
1850
CpuDefinitionInfoList **cpu_list = user_data;
1851
CpuDefinitionInfoList *entry;
1852
CpuDefinitionInfo *info;
1853
const char *typename;
1855
typename = object_class_get_name(oc);
1856
info = g_malloc0(sizeof(*info));
1857
info->name = g_strndup(typename,
1858
strlen(typename) - strlen("-" TYPE_ARM_CPU));
1860
entry = g_malloc0(sizeof(*entry));
1861
entry->value = info;
1862
entry->next = *cpu_list;
1866
CpuDefinitionInfoList *arch_query_cpu_definitions(Error **errp)
1868
CpuDefinitionInfoList *cpu_list = NULL;
1871
list = object_class_get_list(TYPE_ARM_CPU, false);
1872
g_slist_foreach(list, arm_cpu_add_definition, &cpu_list);
1878
void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
1879
const ARMCPRegInfo *r, void *opaque)
1881
/* Define implementations of coprocessor registers.
1882
* We store these in a hashtable because typically
1883
* there are less than 150 registers in a space which
1884
* is 16*16*16*8*8 = 262144 in size.
1885
* Wildcarding is supported for the crm, opc1 and opc2 fields.
1886
* If a register is defined twice then the second definition is
1887
* used, so this can be used to define some generic registers and
1888
* then override them with implementation specific variations.
1889
* At least one of the original and the second definition should
1890
* include ARM_CP_OVERRIDE in its type bits -- this is just a guard
1891
* against accidental use.
1893
int crm, opc1, opc2;
1894
int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
1895
int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
1896
int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
1897
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
1898
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
1899
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
1900
/* 64 bit registers have only CRm and Opc1 fields */
1901
assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
1902
/* Check that the register definition has enough info to handle
1903
* reads and writes if they are permitted.
1905
if (!(r->type & (ARM_CP_SPECIAL|ARM_CP_CONST))) {
1906
if (r->access & PL3_R) {
1907
assert(r->fieldoffset || r->readfn);
1909
if (r->access & PL3_W) {
1910
assert(r->fieldoffset || r->writefn);
1913
/* Bad type field probably means missing sentinel at end of reg list */
1914
assert(cptype_valid(r->type));
1915
for (crm = crmmin; crm <= crmmax; crm++) {
1916
for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
1917
for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
1918
uint32_t *key = g_new(uint32_t, 1);
1919
ARMCPRegInfo *r2 = g_memdup(r, sizeof(ARMCPRegInfo));
1920
int is64 = (r->type & ARM_CP_64BIT) ? 1 : 0;
1921
*key = ENCODE_CP_REG(r->cp, is64, r->crn, crm, opc1, opc2);
1923
r2->opaque = opaque;
1925
/* Make sure reginfo passed to helpers for wildcarded regs
1926
* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
1931
/* By convention, for wildcarded registers only the first
1932
* entry is used for migration; the others are marked as
1933
* NO_MIGRATE so we don't try to transfer the register
1934
* multiple times. Special registers (ie NOP/WFI) are
1937
if ((r->type & ARM_CP_SPECIAL) ||
1938
((r->crm == CP_ANY) && crm != 0) ||
1939
((r->opc1 == CP_ANY) && opc1 != 0) ||
1940
((r->opc2 == CP_ANY) && opc2 != 0)) {
1941
r2->type |= ARM_CP_NO_MIGRATE;
1944
/* Overriding of an existing definition must be explicitly
1947
if (!(r->type & ARM_CP_OVERRIDE)) {
1948
ARMCPRegInfo *oldreg;
1949
oldreg = g_hash_table_lookup(cpu->cp_regs, key);
1950
if (oldreg && !(oldreg->type & ARM_CP_OVERRIDE)) {
1951
fprintf(stderr, "Register redefined: cp=%d %d bit "
1952
"crn=%d crm=%d opc1=%d opc2=%d, "
1953
"was %s, now %s\n", r2->cp, 32 + 32 * is64,
1954
r2->crn, r2->crm, r2->opc1, r2->opc2,
1955
oldreg->name, r2->name);
1956
g_assert_not_reached();
1959
g_hash_table_insert(cpu->cp_regs, key, r2);
1965
void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
1966
const ARMCPRegInfo *regs, void *opaque)
1968
/* Define a whole list of registers */
1969
const ARMCPRegInfo *r;
1970
for (r = regs; r->type != ARM_CP_SENTINEL; r++) {
1971
define_one_arm_cp_reg_with_opaque(cpu, r, opaque);
1975
const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp)
1977
return g_hash_table_lookup(cpu->cp_regs, &encoded_cp);
1980
int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
1983
/* Helper coprocessor write function for write-ignore registers */
1987
int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value)
1989
/* Helper coprocessor write function for read-as-zero registers */
1994
static int bad_mode_switch(CPUARMState *env, int mode)
1996
/* Return true if it is not valid for us to switch to
1997
* this CPU mode (ie all the UNPREDICTABLE cases in
1998
* the ARM ARM CPSRWriteByInstr pseudocode).
2001
case ARM_CPU_MODE_USR:
2002
case ARM_CPU_MODE_SYS:
2003
case ARM_CPU_MODE_SVC:
2004
case ARM_CPU_MODE_ABT:
2005
case ARM_CPU_MODE_UND:
2006
case ARM_CPU_MODE_IRQ:
2007
case ARM_CPU_MODE_FIQ:
2014
uint32_t cpsr_read(CPUARMState *env)
2017
ZF = (env->ZF == 0);
2018
return env->uncached_cpsr | (env->NF & 0x80000000) | (ZF << 30) |
2019
(env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
2020
| (env->thumb << 5) | ((env->condexec_bits & 3) << 25)
2021
| ((env->condexec_bits & 0xfc) << 8)
2025
void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
2027
if (mask & CPSR_NZCV) {
2028
env->ZF = (~val) & CPSR_Z;
2030
env->CF = (val >> 29) & 1;
2031
env->VF = (val << 3) & 0x80000000;
2034
env->QF = ((val & CPSR_Q) != 0);
2036
env->thumb = ((val & CPSR_T) != 0);
2037
if (mask & CPSR_IT_0_1) {
2038
env->condexec_bits &= ~3;
2039
env->condexec_bits |= (val >> 25) & 3;
2041
if (mask & CPSR_IT_2_7) {
2042
env->condexec_bits &= 3;
2043
env->condexec_bits |= (val >> 8) & 0xfc;
2045
if (mask & CPSR_GE) {
2046
env->GE = (val >> 16) & 0xf;
2049
if ((env->uncached_cpsr ^ val) & mask & CPSR_M) {
2050
if (bad_mode_switch(env, val & CPSR_M)) {
2051
/* Attempt to switch to an invalid mode: this is UNPREDICTABLE.
2052
* We choose to ignore the attempt and leave the CPSR M field
2057
switch_mode(env, val & CPSR_M);
2060
mask &= ~CACHED_CPSR_BITS;
2061
env->uncached_cpsr = (env->uncached_cpsr & ~mask) | (val & mask);
2064
/* Sign/zero extend */
2065
uint32_t HELPER(sxtb16)(uint32_t x)
2068
res = (uint16_t)(int8_t)x;
2069
res |= (uint32_t)(int8_t)(x >> 16) << 16;
2073
uint32_t HELPER(uxtb16)(uint32_t x)
2076
res = (uint16_t)(uint8_t)x;
2077
res |= (uint32_t)(uint8_t)(x >> 16) << 16;
2081
uint32_t HELPER(clz)(uint32_t x)
2086
int32_t HELPER(sdiv)(int32_t num, int32_t den)
2090
if (num == INT_MIN && den == -1)
2095
uint32_t HELPER(udiv)(uint32_t num, uint32_t den)
2102
uint32_t HELPER(rbit)(uint32_t x)
2104
x = ((x & 0xff000000) >> 24)
2105
| ((x & 0x00ff0000) >> 8)
2106
| ((x & 0x0000ff00) << 8)
2107
| ((x & 0x000000ff) << 24);
2108
x = ((x & 0xf0f0f0f0) >> 4)
2109
| ((x & 0x0f0f0f0f) << 4);
2110
x = ((x & 0x88888888) >> 3)
2111
| ((x & 0x44444444) >> 1)
2112
| ((x & 0x22222222) << 1)
2113
| ((x & 0x11111111) << 3);
2117
#if defined(CONFIG_USER_ONLY)
2119
void arm_cpu_do_interrupt(CPUState *cs)
2121
ARMCPU *cpu = ARM_CPU(cs);
2122
CPUARMState *env = &cpu->env;
2124
env->exception_index = -1;
2127
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw,
2131
env->exception_index = EXCP_PREFETCH_ABORT;
2132
env->cp15.c6_insn = address;
2134
env->exception_index = EXCP_DATA_ABORT;
2135
env->cp15.c6_data = address;
2140
/* These should probably raise undefined insn exceptions. */
2141
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
2143
cpu_abort(env, "v7m_mrs %d\n", reg);
2146
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
2148
cpu_abort(env, "v7m_mrs %d\n", reg);
2152
void switch_mode(CPUARMState *env, int mode)
2154
if (mode != ARM_CPU_MODE_USR)
2155
cpu_abort(env, "Tried to switch out of user mode\n");
2158
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
2160
cpu_abort(env, "banked r13 write\n");
2163
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
2165
cpu_abort(env, "banked r13 read\n");
2171
/* Map CPU modes onto saved register banks. */
2172
int bank_number(int mode)
2175
case ARM_CPU_MODE_USR:
2176
case ARM_CPU_MODE_SYS:
2178
case ARM_CPU_MODE_SVC:
2180
case ARM_CPU_MODE_ABT:
2182
case ARM_CPU_MODE_UND:
2184
case ARM_CPU_MODE_IRQ:
2186
case ARM_CPU_MODE_FIQ:
2189
hw_error("bank number requested for bad CPSR mode value 0x%x\n", mode);
2192
void switch_mode(CPUARMState *env, int mode)
2197
old_mode = env->uncached_cpsr & CPSR_M;
2198
if (mode == old_mode)
2201
if (old_mode == ARM_CPU_MODE_FIQ) {
2202
memcpy (env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t));
2203
memcpy (env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t));
2204
} else if (mode == ARM_CPU_MODE_FIQ) {
2205
memcpy (env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t));
2206
memcpy (env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t));
2209
i = bank_number(old_mode);
2210
env->banked_r13[i] = env->regs[13];
2211
env->banked_r14[i] = env->regs[14];
2212
env->banked_spsr[i] = env->spsr;
2214
i = bank_number(mode);
2215
env->regs[13] = env->banked_r13[i];
2216
env->regs[14] = env->banked_r14[i];
2217
env->spsr = env->banked_spsr[i];
2220
static void v7m_push(CPUARMState *env, uint32_t val)
2223
stl_phys(env->regs[13], val);
2226
static uint32_t v7m_pop(CPUARMState *env)
2229
val = ldl_phys(env->regs[13]);
2234
/* Switch to V7M main or process stack pointer. */
2235
static void switch_v7m_sp(CPUARMState *env, int process)
2238
if (env->v7m.current_sp != process) {
2239
tmp = env->v7m.other_sp;
2240
env->v7m.other_sp = env->regs[13];
2241
env->regs[13] = tmp;
2242
env->v7m.current_sp = process;
2246
static void do_v7m_exception_exit(CPUARMState *env)
2251
type = env->regs[15];
2252
if (env->v7m.exception != 0)
2253
armv7m_nvic_complete_irq(env->nvic, env->v7m.exception);
2255
/* Switch to the target stack. */
2256
switch_v7m_sp(env, (type & 4) != 0);
2257
/* Pop registers. */
2258
env->regs[0] = v7m_pop(env);
2259
env->regs[1] = v7m_pop(env);
2260
env->regs[2] = v7m_pop(env);
2261
env->regs[3] = v7m_pop(env);
2262
env->regs[12] = v7m_pop(env);
2263
env->regs[14] = v7m_pop(env);
2264
env->regs[15] = v7m_pop(env);
2265
xpsr = v7m_pop(env);
2266
xpsr_write(env, xpsr, 0xfffffdff);
2267
/* Undo stack alignment. */
2270
/* ??? The exception return type specifies Thread/Handler mode. However
2271
this is also implied by the xPSR value. Not sure what to do
2272
if there is a mismatch. */
2273
/* ??? Likewise for mismatches between the CONTROL register and the stack
2277
/* Exception names for debug logging; note that not all of these
2278
* precisely correspond to architectural exceptions.
2280
static const char * const excnames[] = {
2281
[EXCP_UDEF] = "Undefined Instruction",
2283
[EXCP_PREFETCH_ABORT] = "Prefetch Abort",
2284
[EXCP_DATA_ABORT] = "Data Abort",
2287
[EXCP_BKPT] = "Breakpoint",
2288
[EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
2289
[EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
2290
[EXCP_STREX] = "QEMU intercept of STREX",
2293
static inline void arm_log_exception(int idx)
2295
if (qemu_loglevel_mask(CPU_LOG_INT)) {
2296
const char *exc = NULL;
2298
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
2299
exc = excnames[idx];
2304
qemu_log_mask(CPU_LOG_INT, "Taking exception %d [%s]\n", idx, exc);
2308
void arm_v7m_cpu_do_interrupt(CPUState *cs)
2310
ARMCPU *cpu = ARM_CPU(cs);
2311
CPUARMState *env = &cpu->env;
2312
uint32_t xpsr = xpsr_read(env);
2316
arm_log_exception(env->exception_index);
2319
if (env->v7m.current_sp)
2321
if (env->v7m.exception == 0)
2324
/* For exceptions we just mark as pending on the NVIC, and let that
2326
/* TODO: Need to escalate if the current priority is higher than the
2327
one we're raising. */
2328
switch (env->exception_index) {
2330
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE);
2333
/* The PC already points to the next instruction. */
2334
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC);
2336
case EXCP_PREFETCH_ABORT:
2337
case EXCP_DATA_ABORT:
2338
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM);
2341
if (semihosting_enabled) {
2343
nr = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
2346
env->regs[0] = do_arm_semihosting(env);
2347
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2351
armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG);
2354
env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic);
2356
case EXCP_EXCEPTION_EXIT:
2357
do_v7m_exception_exit(env);
2360
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
2361
return; /* Never happens. Keep compiler happy. */
2364
/* Align stack pointer. */
2365
/* ??? Should only do this if Configuration Control Register
2366
STACKALIGN bit is set. */
2367
if (env->regs[13] & 4) {
2371
/* Switch to the handler mode. */
2372
v7m_push(env, xpsr);
2373
v7m_push(env, env->regs[15]);
2374
v7m_push(env, env->regs[14]);
2375
v7m_push(env, env->regs[12]);
2376
v7m_push(env, env->regs[3]);
2377
v7m_push(env, env->regs[2]);
2378
v7m_push(env, env->regs[1]);
2379
v7m_push(env, env->regs[0]);
2380
switch_v7m_sp(env, 0);
2382
env->condexec_bits = 0;
2384
addr = ldl_phys(env->v7m.vecbase + env->v7m.exception * 4);
2385
env->regs[15] = addr & 0xfffffffe;
2386
env->thumb = addr & 1;
2389
/* Handle a CPU exception. */
2390
void arm_cpu_do_interrupt(CPUState *cs)
2392
ARMCPU *cpu = ARM_CPU(cs);
2393
CPUARMState *env = &cpu->env;
2401
arm_log_exception(env->exception_index);
2403
/* TODO: Vectored interrupt controller. */
2404
switch (env->exception_index) {
2406
new_mode = ARM_CPU_MODE_UND;
2415
if (semihosting_enabled) {
2416
/* Check for semihosting interrupt. */
2418
mask = arm_lduw_code(env, env->regs[15] - 2, env->bswap_code)
2421
mask = arm_ldl_code(env, env->regs[15] - 4, env->bswap_code)
2424
/* Only intercept calls from privileged modes, to provide some
2425
semblance of security. */
2426
if (((mask == 0x123456 && !env->thumb)
2427
|| (mask == 0xab && env->thumb))
2428
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
2429
env->regs[0] = do_arm_semihosting(env);
2430
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2434
new_mode = ARM_CPU_MODE_SVC;
2437
/* The PC already points to the next instruction. */
2441
/* See if this is a semihosting syscall. */
2442
if (env->thumb && semihosting_enabled) {
2443
mask = arm_lduw_code(env, env->regs[15], env->bswap_code) & 0xff;
2445
&& (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR) {
2447
env->regs[0] = do_arm_semihosting(env);
2448
qemu_log_mask(CPU_LOG_INT, "...handled as semihosting call\n");
2452
env->cp15.c5_insn = 2;
2453
/* Fall through to prefetch abort. */
2454
case EXCP_PREFETCH_ABORT:
2455
qemu_log_mask(CPU_LOG_INT, "...with IFSR 0x%x IFAR 0x%x\n",
2456
env->cp15.c5_insn, env->cp15.c6_insn);
2457
new_mode = ARM_CPU_MODE_ABT;
2459
mask = CPSR_A | CPSR_I;
2462
case EXCP_DATA_ABORT:
2463
qemu_log_mask(CPU_LOG_INT, "...with DFSR 0x%x DFAR 0x%x\n",
2464
env->cp15.c5_data, env->cp15.c6_data);
2465
new_mode = ARM_CPU_MODE_ABT;
2467
mask = CPSR_A | CPSR_I;
2471
new_mode = ARM_CPU_MODE_IRQ;
2473
/* Disable IRQ and imprecise data aborts. */
2474
mask = CPSR_A | CPSR_I;
2478
new_mode = ARM_CPU_MODE_FIQ;
2480
/* Disable FIQ, IRQ and imprecise data aborts. */
2481
mask = CPSR_A | CPSR_I | CPSR_F;
2485
cpu_abort(env, "Unhandled exception 0x%x\n", env->exception_index);
2486
return; /* Never happens. Keep compiler happy. */
2489
if (env->cp15.c1_sys & (1 << 13)) {
2490
/* when enabled, base address cannot be remapped. */
2493
/* ARM v7 architectures provide a vector base address register to remap
2494
* the interrupt vector table.
2495
* This register is only followed in non-monitor mode, and has a secure
2496
* and un-secure copy. Since the cpu is always in a un-secure operation
2497
* and is never in monitor mode this feature is always active.
2498
* Note: only bits 31:5 are valid.
2500
addr += env->cp15.c12_vbar;
2502
switch_mode (env, new_mode);
2503
env->spsr = cpsr_read(env);
2504
/* Clear IT bits. */
2505
env->condexec_bits = 0;
2506
/* Switch to the new mode, and to the correct instruction set. */
2507
env->uncached_cpsr = (env->uncached_cpsr & ~CPSR_M) | new_mode;
2508
env->uncached_cpsr |= mask;
2509
/* this is a lie, as the was no c1_sys on V4T/V5, but who cares
2510
* and we should just guard the thumb mode on V4 */
2511
if (arm_feature(env, ARM_FEATURE_V4T)) {
2512
env->thumb = (env->cp15.c1_sys & (1 << 30)) != 0;
2514
env->regs[14] = env->regs[15] + offset;
2515
env->regs[15] = addr;
2516
cs->interrupt_request |= CPU_INTERRUPT_EXITTB;
2519
/* Check section/page access permissions.
2520
Returns the page protection flags, or zero if the access is not
2522
static inline int check_ap(CPUARMState *env, int ap, int domain_prot,
2523
int access_type, int is_user)
2527
if (domain_prot == 3) {
2528
return PAGE_READ | PAGE_WRITE;
2531
if (access_type == 1)
2534
prot_ro = PAGE_READ;
2538
if (access_type == 1)
2540
switch ((env->cp15.c1_sys >> 8) & 3) {
2542
return is_user ? 0 : PAGE_READ;
2549
return is_user ? 0 : PAGE_READ | PAGE_WRITE;
2554
return PAGE_READ | PAGE_WRITE;
2556
return PAGE_READ | PAGE_WRITE;
2557
case 4: /* Reserved. */
2560
return is_user ? 0 : prot_ro;
2564
if (!arm_feature (env, ARM_FEATURE_V6K))
2572
static uint32_t get_level1_table_address(CPUARMState *env, uint32_t address)
2576
if (address & env->cp15.c2_mask)
2577
table = env->cp15.c2_base1 & 0xffffc000;
2579
table = env->cp15.c2_base0 & env->cp15.c2_base_mask;
2581
table |= (address >> 18) & 0x3ffc;
2585
static int get_phys_addr_v5(CPUARMState *env, uint32_t address, int access_type,
2586
int is_user, hwaddr *phys_ptr,
2587
int *prot, target_ulong *page_size)
2598
/* Pagetable walk. */
2599
/* Lookup l1 descriptor. */
2600
table = get_level1_table_address(env, address);
2601
desc = ldl_phys(table);
2603
domain = (desc >> 5) & 0x0f;
2604
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
2606
/* Section translation fault. */
2610
if (domain_prot == 0 || domain_prot == 2) {
2612
code = 9; /* Section domain fault. */
2614
code = 11; /* Page domain fault. */
2619
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
2620
ap = (desc >> 10) & 3;
2622
*page_size = 1024 * 1024;
2624
/* Lookup l2 entry. */
2626
/* Coarse pagetable. */
2627
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
2629
/* Fine pagetable. */
2630
table = (desc & 0xfffff000) | ((address >> 8) & 0xffc);
2632
desc = ldl_phys(table);
2634
case 0: /* Page translation fault. */
2637
case 1: /* 64k page. */
2638
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
2639
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
2640
*page_size = 0x10000;
2642
case 2: /* 4k page. */
2643
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2644
ap = (desc >> (4 + ((address >> 13) & 6))) & 3;
2645
*page_size = 0x1000;
2647
case 3: /* 1k page. */
2649
if (arm_feature(env, ARM_FEATURE_XSCALE)) {
2650
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2652
/* Page translation fault. */
2657
phys_addr = (desc & 0xfffffc00) | (address & 0x3ff);
2659
ap = (desc >> 4) & 3;
2663
/* Never happens, but compiler isn't smart enough to tell. */
2668
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
2670
/* Access permission fault. */
2674
*phys_ptr = phys_addr;
2677
return code | (domain << 4);
2680
static int get_phys_addr_v6(CPUARMState *env, uint32_t address, int access_type,
2681
int is_user, hwaddr *phys_ptr,
2682
int *prot, target_ulong *page_size)
2695
/* Pagetable walk. */
2696
/* Lookup l1 descriptor. */
2697
table = get_level1_table_address(env, address);
2698
desc = ldl_phys(table);
2700
if (type == 0 || (type == 3 && !arm_feature(env, ARM_FEATURE_PXN))) {
2701
/* Section translation fault, or attempt to use the encoding
2702
* which is Reserved on implementations without PXN.
2707
if ((type == 1) || !(desc & (1 << 18))) {
2708
/* Page or Section. */
2709
domain = (desc >> 5) & 0x0f;
2711
domain_prot = (env->cp15.c3 >> (domain * 2)) & 3;
2712
if (domain_prot == 0 || domain_prot == 2) {
2714
code = 9; /* Section domain fault. */
2716
code = 11; /* Page domain fault. */
2721
if (desc & (1 << 18)) {
2723
phys_addr = (desc & 0xff000000) | (address & 0x00ffffff);
2724
*page_size = 0x1000000;
2727
phys_addr = (desc & 0xfff00000) | (address & 0x000fffff);
2728
*page_size = 0x100000;
2730
ap = ((desc >> 10) & 3) | ((desc >> 13) & 4);
2731
xn = desc & (1 << 4);
2735
if (arm_feature(env, ARM_FEATURE_PXN)) {
2736
pxn = (desc >> 2) & 1;
2738
/* Lookup l2 entry. */
2739
table = (desc & 0xfffffc00) | ((address >> 10) & 0x3fc);
2740
desc = ldl_phys(table);
2741
ap = ((desc >> 4) & 3) | ((desc >> 7) & 4);
2743
case 0: /* Page translation fault. */
2746
case 1: /* 64k page. */
2747
phys_addr = (desc & 0xffff0000) | (address & 0xffff);
2748
xn = desc & (1 << 15);
2749
*page_size = 0x10000;
2751
case 2: case 3: /* 4k page. */
2752
phys_addr = (desc & 0xfffff000) | (address & 0xfff);
2754
*page_size = 0x1000;
2757
/* Never happens, but compiler isn't smart enough to tell. */
2762
if (domain_prot == 3) {
2763
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
2765
if (pxn && !is_user) {
2768
if (xn && access_type == 2)
2771
/* The simplified model uses AP[0] as an access control bit. */
2772
if ((env->cp15.c1_sys & (1 << 29)) && (ap & 1) == 0) {
2773
/* Access flag fault. */
2774
code = (code == 15) ? 6 : 3;
2777
*prot = check_ap(env, ap, domain_prot, access_type, is_user);
2779
/* Access permission fault. */
2786
*phys_ptr = phys_addr;
2789
return code | (domain << 4);
2792
/* Fault type for long-descriptor MMU fault reporting; this corresponds
2793
* to bits [5..2] in the STATUS field in long-format DFSR/IFSR.
2796
translation_fault = 1,
2798
permission_fault = 3,
2801
static int get_phys_addr_lpae(CPUARMState *env, uint32_t address,
2802
int access_type, int is_user,
2803
hwaddr *phys_ptr, int *prot,
2804
target_ulong *page_size_ptr)
2806
/* Read an LPAE long-descriptor translation table. */
2807
MMUFaultType fault_type = translation_fault;
2815
uint32_t tableattrs;
2816
target_ulong page_size;
2819
/* Determine whether this address is in the region controlled by
2820
* TTBR0 or TTBR1 (or if it is in neither region and should fault).
2821
* This is a Non-secure PL0/1 stage 1 translation, so controlled by
2822
* TTBCR/TTBR0/TTBR1 in accordance with ARM ARM DDI0406C table B-32:
2824
uint32_t t0sz = extract32(env->cp15.c2_control, 0, 3);
2825
uint32_t t1sz = extract32(env->cp15.c2_control, 16, 3);
2826
if (t0sz && !extract32(address, 32 - t0sz, t0sz)) {
2827
/* there is a ttbr0 region and we are in it (high bits all zero) */
2829
} else if (t1sz && !extract32(~address, 32 - t1sz, t1sz)) {
2830
/* there is a ttbr1 region and we are in it (high bits all one) */
2833
/* ttbr0 region is "everything not in the ttbr1 region" */
2836
/* ttbr1 region is "everything not in the ttbr0 region" */
2839
/* in the gap between the two regions, this is a Translation fault */
2840
fault_type = translation_fault;
2844
/* Note that QEMU ignores shareability and cacheability attributes,
2845
* so we don't need to do anything with the SH, ORGN, IRGN fields
2846
* in the TTBCR. Similarly, TTBCR:A1 selects whether we get the
2847
* ASID from TTBR0 or TTBR1, but QEMU's TLB doesn't currently
2848
* implement any ASID-like capability so we can ignore it (instead
2849
* we will always flush the TLB any time the ASID is changed).
2851
if (ttbr_select == 0) {
2852
ttbr = ((uint64_t)env->cp15.c2_base0_hi << 32) | env->cp15.c2_base0;
2853
epd = extract32(env->cp15.c2_control, 7, 1);
2856
ttbr = ((uint64_t)env->cp15.c2_base1_hi << 32) | env->cp15.c2_base1;
2857
epd = extract32(env->cp15.c2_control, 23, 1);
2862
/* Translation table walk disabled => Translation fault on TLB miss */
2866
/* If the region is small enough we will skip straight to a 2nd level
2867
* lookup. This affects the number of bits of the address used in
2868
* combination with the TTBR to find the first descriptor. ('n' here
2869
* matches the usage in the ARM ARM sB3.6.6, where bits [39..n] are
2870
* from the TTBR, [n-1..3] from the vaddr, and [2..0] always zero).
2879
/* Clear the vaddr bits which aren't part of the within-region address,
2880
* so that we don't have to special case things when calculating the
2881
* first descriptor address.
2883
address &= (0xffffffffU >> tsz);
2885
/* Now we can extract the actual base address from the TTBR */
2886
descaddr = extract64(ttbr, 0, 40);
2887
descaddr &= ~((1ULL << n) - 1);
2891
uint64_t descriptor;
2893
descaddr |= ((address >> (9 * (4 - level))) & 0xff8);
2894
descriptor = ldq_phys(descaddr);
2895
if (!(descriptor & 1) ||
2896
(!(descriptor & 2) && (level == 3))) {
2897
/* Invalid, or the Reserved level 3 encoding */
2900
descaddr = descriptor & 0xfffffff000ULL;
2902
if ((descriptor & 2) && (level < 3)) {
2903
/* Table entry. The top five bits are attributes which may
2904
* propagate down through lower levels of the table (and
2905
* which are all arranged so that 0 means "no effect", so
2906
* we can gather them up by ORing in the bits at each level).
2908
tableattrs |= extract64(descriptor, 59, 5);
2912
/* Block entry at level 1 or 2, or page entry at level 3.
2913
* These are basically the same thing, although the number
2914
* of bits we pull in from the vaddr varies.
2916
page_size = (1 << (39 - (9 * level)));
2917
descaddr |= (address & (page_size - 1));
2918
/* Extract attributes from the descriptor and merge with table attrs */
2919
attrs = extract64(descriptor, 2, 10)
2920
| (extract64(descriptor, 52, 12) << 10);
2921
attrs |= extract32(tableattrs, 0, 2) << 11; /* XN, PXN */
2922
attrs |= extract32(tableattrs, 3, 1) << 5; /* APTable[1] => AP[2] */
2923
/* The sense of AP[1] vs APTable[0] is reversed, as APTable[0] == 1
2924
* means "force PL1 access only", which means forcing AP[1] to 0.
2926
if (extract32(tableattrs, 2, 1)) {
2929
/* Since we're always in the Non-secure state, NSTable is ignored. */
2932
/* Here descaddr is the final physical address, and attributes
2935
fault_type = access_fault;
2936
if ((attrs & (1 << 8)) == 0) {
2940
fault_type = permission_fault;
2941
if (is_user && !(attrs & (1 << 4))) {
2942
/* Unprivileged access not enabled */
2945
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
2946
if (attrs & (1 << 12) || (!is_user && (attrs & (1 << 11)))) {
2948
if (access_type == 2) {
2951
*prot &= ~PAGE_EXEC;
2953
if (attrs & (1 << 5)) {
2954
/* Write access forbidden */
2955
if (access_type == 1) {
2958
*prot &= ~PAGE_WRITE;
2961
*phys_ptr = descaddr;
2962
*page_size_ptr = page_size;
2966
/* Long-descriptor format IFSR/DFSR value */
2967
return (1 << 9) | (fault_type << 2) | level;
2970
static int get_phys_addr_mpu(CPUARMState *env, uint32_t address,
2971
int access_type, int is_user,
2972
hwaddr *phys_ptr, int *prot)
2978
*phys_ptr = address;
2979
for (n = 7; n >= 0; n--) {
2980
base = env->cp15.c6_region[n];
2981
if ((base & 1) == 0)
2983
mask = 1 << ((base >> 1) & 0x1f);
2984
/* Keep this shift separate from the above to avoid an
2985
(undefined) << 32. */
2986
mask = (mask << 1) - 1;
2987
if (((base ^ address) & ~mask) == 0)
2993
if (access_type == 2) {
2994
mask = env->cp15.c5_insn;
2996
mask = env->cp15.c5_data;
2998
mask = (mask >> (n * 4)) & 0xf;
3005
*prot = PAGE_READ | PAGE_WRITE;
3010
*prot |= PAGE_WRITE;
3013
*prot = PAGE_READ | PAGE_WRITE;
3024
/* Bad permission. */
3031
/* get_phys_addr - get the physical address for this virtual address
3033
* Find the physical address corresponding to the given virtual address,
3034
* by doing a translation table walk on MMU based systems or using the
3035
* MPU state on MPU based systems.
3037
* Returns 0 if the translation was successful. Otherwise, phys_ptr,
3038
* prot and page_size are not filled in, and the return value provides
3039
* information on why the translation aborted, in the format of a
3040
* DFSR/IFSR fault register, with the following caveats:
3041
* * we honour the short vs long DFSR format differences.
3042
* * the WnR bit is never set (the caller must do this).
3043
* * for MPU based systems we don't bother to return a full FSR format
3047
* @address: virtual address to get physical address for
3048
* @access_type: 0 for read, 1 for write, 2 for execute
3049
* @is_user: 0 for privileged access, 1 for user
3050
* @phys_ptr: set to the physical address corresponding to the virtual address
3051
* @prot: set to the permissions for the page containing phys_ptr
3052
* @page_size: set to the size of the page containing phys_ptr
3054
static inline int get_phys_addr(CPUARMState *env, uint32_t address,
3055
int access_type, int is_user,
3056
hwaddr *phys_ptr, int *prot,
3057
target_ulong *page_size)
3059
/* Fast Context Switch Extension. */
3060
if (address < 0x02000000)
3061
address += env->cp15.c13_fcse;
3063
if ((env->cp15.c1_sys & 1) == 0) {
3064
/* MMU/MPU disabled. */
3065
*phys_ptr = address;
3066
*prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
3067
*page_size = TARGET_PAGE_SIZE;
3069
} else if (arm_feature(env, ARM_FEATURE_MPU)) {
3070
*page_size = TARGET_PAGE_SIZE;
3071
return get_phys_addr_mpu(env, address, access_type, is_user, phys_ptr,
3073
} else if (extended_addresses_enabled(env)) {
3074
return get_phys_addr_lpae(env, address, access_type, is_user, phys_ptr,
3076
} else if (env->cp15.c1_sys & (1 << 23)) {
3077
return get_phys_addr_v6(env, address, access_type, is_user, phys_ptr,
3080
return get_phys_addr_v5(env, address, access_type, is_user, phys_ptr,
3085
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address,
3086
int access_type, int mmu_idx)
3089
target_ulong page_size;
3093
is_user = mmu_idx == MMU_USER_IDX;
3094
ret = get_phys_addr(env, address, access_type, is_user, &phys_addr, &prot,
3097
/* Map a single [sub]page. */
3098
phys_addr &= ~(hwaddr)0x3ff;
3099
address &= ~(uint32_t)0x3ff;
3100
tlb_set_page (env, address, phys_addr, prot, mmu_idx, page_size);
3104
if (access_type == 2) {
3105
env->cp15.c5_insn = ret;
3106
env->cp15.c6_insn = address;
3107
env->exception_index = EXCP_PREFETCH_ABORT;
3109
env->cp15.c5_data = ret;
3110
if (access_type == 1 && arm_feature(env, ARM_FEATURE_V6))
3111
env->cp15.c5_data |= (1 << 11);
3112
env->cp15.c6_data = address;
3113
env->exception_index = EXCP_DATA_ABORT;
3118
hwaddr arm_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
3120
ARMCPU *cpu = ARM_CPU(cs);
3122
target_ulong page_size;
3126
ret = get_phys_addr(&cpu->env, addr, 0, 0, &phys_addr, &prot, &page_size);
3135
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
3137
if ((env->uncached_cpsr & CPSR_M) == mode) {
3138
env->regs[13] = val;
3140
env->banked_r13[bank_number(mode)] = val;
3144
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
3146
if ((env->uncached_cpsr & CPSR_M) == mode) {
3147
return env->regs[13];
3149
return env->banked_r13[bank_number(mode)];
3153
uint32_t HELPER(v7m_mrs)(CPUARMState *env, uint32_t reg)
3157
return xpsr_read(env) & 0xf8000000;
3159
return xpsr_read(env) & 0xf80001ff;
3161
return xpsr_read(env) & 0xff00fc00;
3163
return xpsr_read(env) & 0xff00fdff;
3165
return xpsr_read(env) & 0x000001ff;
3167
return xpsr_read(env) & 0x0700fc00;
3169
return xpsr_read(env) & 0x0700edff;
3171
return env->v7m.current_sp ? env->v7m.other_sp : env->regs[13];
3173
return env->v7m.current_sp ? env->regs[13] : env->v7m.other_sp;
3174
case 16: /* PRIMASK */
3175
return (env->uncached_cpsr & CPSR_I) != 0;
3176
case 17: /* BASEPRI */
3177
case 18: /* BASEPRI_MAX */
3178
return env->v7m.basepri;
3179
case 19: /* FAULTMASK */
3180
return (env->uncached_cpsr & CPSR_F) != 0;
3181
case 20: /* CONTROL */
3182
return env->v7m.control;
3184
/* ??? For debugging only. */
3185
cpu_abort(env, "Unimplemented system register read (%d)\n", reg);
3190
void HELPER(v7m_msr)(CPUARMState *env, uint32_t reg, uint32_t val)
3194
xpsr_write(env, val, 0xf8000000);
3197
xpsr_write(env, val, 0xf8000000);
3200
xpsr_write(env, val, 0xfe00fc00);
3203
xpsr_write(env, val, 0xfe00fc00);
3206
/* IPSR bits are readonly. */
3209
xpsr_write(env, val, 0x0600fc00);
3212
xpsr_write(env, val, 0x0600fc00);
3215
if (env->v7m.current_sp)
3216
env->v7m.other_sp = val;
3218
env->regs[13] = val;
3221
if (env->v7m.current_sp)
3222
env->regs[13] = val;
3224
env->v7m.other_sp = val;
3226
case 16: /* PRIMASK */
3228
env->uncached_cpsr |= CPSR_I;
3230
env->uncached_cpsr &= ~CPSR_I;
3232
case 17: /* BASEPRI */
3233
env->v7m.basepri = val & 0xff;
3235
case 18: /* BASEPRI_MAX */
3237
if (val != 0 && (val < env->v7m.basepri || env->v7m.basepri == 0))
3238
env->v7m.basepri = val;
3240
case 19: /* FAULTMASK */
3242
env->uncached_cpsr |= CPSR_F;
3244
env->uncached_cpsr &= ~CPSR_F;
3246
case 20: /* CONTROL */
3247
env->v7m.control = val & 3;
3248
switch_v7m_sp(env, (val & 2) != 0);
3251
/* ??? For debugging only. */
3252
cpu_abort(env, "Unimplemented system register write (%d)\n", reg);
3259
/* Note that signed overflow is undefined in C. The following routines are
3260
careful to use unsigned types where modulo arithmetic is required.
3261
Failure to do so _will_ break on newer gcc. */
3263
/* Signed saturating arithmetic. */
3265
/* Perform 16-bit signed saturating addition. */
3266
static inline uint16_t add16_sat(uint16_t a, uint16_t b)
3271
if (((res ^ a) & 0x8000) && !((a ^ b) & 0x8000)) {
3280
/* Perform 8-bit signed saturating addition. */
3281
static inline uint8_t add8_sat(uint8_t a, uint8_t b)
3286
if (((res ^ a) & 0x80) && !((a ^ b) & 0x80)) {
3295
/* Perform 16-bit signed saturating subtraction. */
3296
static inline uint16_t sub16_sat(uint16_t a, uint16_t b)
3301
if (((res ^ a) & 0x8000) && ((a ^ b) & 0x8000)) {
3310
/* Perform 8-bit signed saturating subtraction. */
3311
static inline uint8_t sub8_sat(uint8_t a, uint8_t b)
3316
if (((res ^ a) & 0x80) && ((a ^ b) & 0x80)) {
3325
#define ADD16(a, b, n) RESULT(add16_sat(a, b), n, 16);
3326
#define SUB16(a, b, n) RESULT(sub16_sat(a, b), n, 16);
3327
#define ADD8(a, b, n) RESULT(add8_sat(a, b), n, 8);
3328
#define SUB8(a, b, n) RESULT(sub8_sat(a, b), n, 8);
3331
#include "op_addsub.h"
3333
/* Unsigned saturating arithmetic. */
3334
static inline uint16_t add16_usat(uint16_t a, uint16_t b)
3343
static inline uint16_t sub16_usat(uint16_t a, uint16_t b)
3351
static inline uint8_t add8_usat(uint8_t a, uint8_t b)
3360
static inline uint8_t sub8_usat(uint8_t a, uint8_t b)
3368
#define ADD16(a, b, n) RESULT(add16_usat(a, b), n, 16);
3369
#define SUB16(a, b, n) RESULT(sub16_usat(a, b), n, 16);
3370
#define ADD8(a, b, n) RESULT(add8_usat(a, b), n, 8);
3371
#define SUB8(a, b, n) RESULT(sub8_usat(a, b), n, 8);
3374
#include "op_addsub.h"
3376
/* Signed modulo arithmetic. */
3377
#define SARITH16(a, b, n, op) do { \
3379
sum = (int32_t)(int16_t)(a) op (int32_t)(int16_t)(b); \
3380
RESULT(sum, n, 16); \
3382
ge |= 3 << (n * 2); \
3385
#define SARITH8(a, b, n, op) do { \
3387
sum = (int32_t)(int8_t)(a) op (int32_t)(int8_t)(b); \
3388
RESULT(sum, n, 8); \
3394
#define ADD16(a, b, n) SARITH16(a, b, n, +)
3395
#define SUB16(a, b, n) SARITH16(a, b, n, -)
3396
#define ADD8(a, b, n) SARITH8(a, b, n, +)
3397
#define SUB8(a, b, n) SARITH8(a, b, n, -)
3401
#include "op_addsub.h"
3403
/* Unsigned modulo arithmetic. */
3404
#define ADD16(a, b, n) do { \
3406
sum = (uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b); \
3407
RESULT(sum, n, 16); \
3408
if ((sum >> 16) == 1) \
3409
ge |= 3 << (n * 2); \
3412
#define ADD8(a, b, n) do { \
3414
sum = (uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b); \
3415
RESULT(sum, n, 8); \
3416
if ((sum >> 8) == 1) \
3420
#define SUB16(a, b, n) do { \
3422
sum = (uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b); \
3423
RESULT(sum, n, 16); \
3424
if ((sum >> 16) == 0) \
3425
ge |= 3 << (n * 2); \
3428
#define SUB8(a, b, n) do { \
3430
sum = (uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b); \
3431
RESULT(sum, n, 8); \
3432
if ((sum >> 8) == 0) \
3439
#include "op_addsub.h"
3441
/* Halved signed arithmetic. */
3442
#define ADD16(a, b, n) \
3443
RESULT(((int32_t)(int16_t)(a) + (int32_t)(int16_t)(b)) >> 1, n, 16)
3444
#define SUB16(a, b, n) \
3445
RESULT(((int32_t)(int16_t)(a) - (int32_t)(int16_t)(b)) >> 1, n, 16)
3446
#define ADD8(a, b, n) \
3447
RESULT(((int32_t)(int8_t)(a) + (int32_t)(int8_t)(b)) >> 1, n, 8)
3448
#define SUB8(a, b, n) \
3449
RESULT(((int32_t)(int8_t)(a) - (int32_t)(int8_t)(b)) >> 1, n, 8)
3452
#include "op_addsub.h"
3454
/* Halved unsigned arithmetic. */
3455
#define ADD16(a, b, n) \
3456
RESULT(((uint32_t)(uint16_t)(a) + (uint32_t)(uint16_t)(b)) >> 1, n, 16)
3457
#define SUB16(a, b, n) \
3458
RESULT(((uint32_t)(uint16_t)(a) - (uint32_t)(uint16_t)(b)) >> 1, n, 16)
3459
#define ADD8(a, b, n) \
3460
RESULT(((uint32_t)(uint8_t)(a) + (uint32_t)(uint8_t)(b)) >> 1, n, 8)
3461
#define SUB8(a, b, n) \
3462
RESULT(((uint32_t)(uint8_t)(a) - (uint32_t)(uint8_t)(b)) >> 1, n, 8)
3465
#include "op_addsub.h"
3467
static inline uint8_t do_usad(uint8_t a, uint8_t b)
3475
/* Unsigned sum of absolute byte differences. */
3476
uint32_t HELPER(usad8)(uint32_t a, uint32_t b)
3479
sum = do_usad(a, b);
3480
sum += do_usad(a >> 8, b >> 8);
3481
sum += do_usad(a >> 16, b >>16);
3482
sum += do_usad(a >> 24, b >> 24);
3486
/* For ARMv6 SEL instruction. */
3487
uint32_t HELPER(sel_flags)(uint32_t flags, uint32_t a, uint32_t b)
3500
return (a & mask) | (b & ~mask);
3503
/* VFP support. We follow the convention used for VFP instructions:
3504
Single precision routines have a "s" suffix, double precision a
3507
/* Convert host exception flags to vfp form. */
3508
static inline int vfp_exceptbits_from_host(int host_bits)
3510
int target_bits = 0;
3512
if (host_bits & float_flag_invalid)
3514
if (host_bits & float_flag_divbyzero)
3516
if (host_bits & float_flag_overflow)
3518
if (host_bits & (float_flag_underflow | float_flag_output_denormal))
3520
if (host_bits & float_flag_inexact)
3521
target_bits |= 0x10;
3522
if (host_bits & float_flag_input_denormal)
3523
target_bits |= 0x80;
3527
uint32_t HELPER(vfp_get_fpscr)(CPUARMState *env)
3532
fpscr = (env->vfp.xregs[ARM_VFP_FPSCR] & 0xffc8ffff)
3533
| (env->vfp.vec_len << 16)
3534
| (env->vfp.vec_stride << 20);
3535
i = get_float_exception_flags(&env->vfp.fp_status);
3536
i |= get_float_exception_flags(&env->vfp.standard_fp_status);
3537
fpscr |= vfp_exceptbits_from_host(i);
3541
uint32_t vfp_get_fpscr(CPUARMState *env)
3543
return HELPER(vfp_get_fpscr)(env);
3546
/* Convert vfp exception flags to target form. */
3547
static inline int vfp_exceptbits_to_host(int target_bits)
3551
if (target_bits & 1)
3552
host_bits |= float_flag_invalid;
3553
if (target_bits & 2)
3554
host_bits |= float_flag_divbyzero;
3555
if (target_bits & 4)
3556
host_bits |= float_flag_overflow;
3557
if (target_bits & 8)
3558
host_bits |= float_flag_underflow;
3559
if (target_bits & 0x10)
3560
host_bits |= float_flag_inexact;
3561
if (target_bits & 0x80)
3562
host_bits |= float_flag_input_denormal;
3566
void HELPER(vfp_set_fpscr)(CPUARMState *env, uint32_t val)
3571
changed = env->vfp.xregs[ARM_VFP_FPSCR];
3572
env->vfp.xregs[ARM_VFP_FPSCR] = (val & 0xffc8ffff);
3573
env->vfp.vec_len = (val >> 16) & 7;
3574
env->vfp.vec_stride = (val >> 20) & 3;
3577
if (changed & (3 << 22)) {
3578
i = (val >> 22) & 3;
3581
i = float_round_nearest_even;
3587
i = float_round_down;
3590
i = float_round_to_zero;
3593
set_float_rounding_mode(i, &env->vfp.fp_status);
3595
if (changed & (1 << 24)) {
3596
set_flush_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
3597
set_flush_inputs_to_zero((val & (1 << 24)) != 0, &env->vfp.fp_status);
3599
if (changed & (1 << 25))
3600
set_default_nan_mode((val & (1 << 25)) != 0, &env->vfp.fp_status);
3602
i = vfp_exceptbits_to_host(val);
3603
set_float_exception_flags(i, &env->vfp.fp_status);
3604
set_float_exception_flags(0, &env->vfp.standard_fp_status);
3607
void vfp_set_fpscr(CPUARMState *env, uint32_t val)
3609
HELPER(vfp_set_fpscr)(env, val);
3612
#define VFP_HELPER(name, p) HELPER(glue(glue(vfp_,name),p))
3614
#define VFP_BINOP(name) \
3615
float32 VFP_HELPER(name, s)(float32 a, float32 b, void *fpstp) \
3617
float_status *fpst = fpstp; \
3618
return float32_ ## name(a, b, fpst); \
3620
float64 VFP_HELPER(name, d)(float64 a, float64 b, void *fpstp) \
3622
float_status *fpst = fpstp; \
3623
return float64_ ## name(a, b, fpst); \
3631
float32 VFP_HELPER(neg, s)(float32 a)
3633
return float32_chs(a);
3636
float64 VFP_HELPER(neg, d)(float64 a)
3638
return float64_chs(a);
3641
float32 VFP_HELPER(abs, s)(float32 a)
3643
return float32_abs(a);
3646
float64 VFP_HELPER(abs, d)(float64 a)
3648
return float64_abs(a);
3651
float32 VFP_HELPER(sqrt, s)(float32 a, CPUARMState *env)
3653
return float32_sqrt(a, &env->vfp.fp_status);
3656
float64 VFP_HELPER(sqrt, d)(float64 a, CPUARMState *env)
3658
return float64_sqrt(a, &env->vfp.fp_status);
3661
/* XXX: check quiet/signaling case */
3662
#define DO_VFP_cmp(p, type) \
3663
void VFP_HELPER(cmp, p)(type a, type b, CPUARMState *env) \
3666
switch(type ## _compare_quiet(a, b, &env->vfp.fp_status)) { \
3667
case 0: flags = 0x6; break; \
3668
case -1: flags = 0x8; break; \
3669
case 1: flags = 0x2; break; \
3670
default: case 2: flags = 0x3; break; \
3672
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
3673
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
3675
void VFP_HELPER(cmpe, p)(type a, type b, CPUARMState *env) \
3678
switch(type ## _compare(a, b, &env->vfp.fp_status)) { \
3679
case 0: flags = 0x6; break; \
3680
case -1: flags = 0x8; break; \
3681
case 1: flags = 0x2; break; \
3682
default: case 2: flags = 0x3; break; \
3684
env->vfp.xregs[ARM_VFP_FPSCR] = (flags << 28) \
3685
| (env->vfp.xregs[ARM_VFP_FPSCR] & 0x0fffffff); \
3687
DO_VFP_cmp(s, float32)
3688
DO_VFP_cmp(d, float64)
3691
/* Integer to float and float to integer conversions */
3693
#define CONV_ITOF(name, fsz, sign) \
3694
float##fsz HELPER(name)(uint32_t x, void *fpstp) \
3696
float_status *fpst = fpstp; \
3697
return sign##int32_to_##float##fsz((sign##int32_t)x, fpst); \
3700
#define CONV_FTOI(name, fsz, sign, round) \
3701
uint32_t HELPER(name)(float##fsz x, void *fpstp) \
3703
float_status *fpst = fpstp; \
3704
if (float##fsz##_is_any_nan(x)) { \
3705
float_raise(float_flag_invalid, fpst); \
3708
return float##fsz##_to_##sign##int32##round(x, fpst); \
3711
#define FLOAT_CONVS(name, p, fsz, sign) \
3712
CONV_ITOF(vfp_##name##to##p, fsz, sign) \
3713
CONV_FTOI(vfp_to##name##p, fsz, sign, ) \
3714
CONV_FTOI(vfp_to##name##z##p, fsz, sign, _round_to_zero)
3716
FLOAT_CONVS(si, s, 32, )
3717
FLOAT_CONVS(si, d, 64, )
3718
FLOAT_CONVS(ui, s, 32, u)
3719
FLOAT_CONVS(ui, d, 64, u)
3725
/* floating point conversion */
3726
float64 VFP_HELPER(fcvtd, s)(float32 x, CPUARMState *env)
3728
float64 r = float32_to_float64(x, &env->vfp.fp_status);
3729
/* ARM requires that S<->D conversion of any kind of NaN generates
3730
* a quiet NaN by forcing the most significant frac bit to 1.
3732
return float64_maybe_silence_nan(r);
3735
float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env)
3737
float32 r = float64_to_float32(x, &env->vfp.fp_status);
3738
/* ARM requires that S<->D conversion of any kind of NaN generates
3739
* a quiet NaN by forcing the most significant frac bit to 1.
3741
return float32_maybe_silence_nan(r);
3744
/* VFP3 fixed point conversion. */
3745
#define VFP_CONV_FIX(name, p, fsz, itype, sign) \
3746
float##fsz HELPER(vfp_##name##to##p)(uint##fsz##_t x, uint32_t shift, \
3749
float_status *fpst = fpstp; \
3751
tmp = sign##int32_to_##float##fsz((itype##_t)x, fpst); \
3752
return float##fsz##_scalbn(tmp, -(int)shift, fpst); \
3754
uint##fsz##_t HELPER(vfp_to##name##p)(float##fsz x, uint32_t shift, \
3757
float_status *fpst = fpstp; \
3759
if (float##fsz##_is_any_nan(x)) { \
3760
float_raise(float_flag_invalid, fpst); \
3763
tmp = float##fsz##_scalbn(x, shift, fpst); \
3764
return float##fsz##_to_##itype##_round_to_zero(tmp, fpst); \
3767
VFP_CONV_FIX(sh, d, 64, int16, )
3768
VFP_CONV_FIX(sl, d, 64, int32, )
3769
VFP_CONV_FIX(uh, d, 64, uint16, u)
3770
VFP_CONV_FIX(ul, d, 64, uint32, u)
3771
VFP_CONV_FIX(sh, s, 32, int16, )
3772
VFP_CONV_FIX(sl, s, 32, int32, )
3773
VFP_CONV_FIX(uh, s, 32, uint16, u)
3774
VFP_CONV_FIX(ul, s, 32, uint32, u)
3777
/* Half precision conversions. */
3778
static float32 do_fcvt_f16_to_f32(uint32_t a, CPUARMState *env, float_status *s)
3780
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
3781
float32 r = float16_to_float32(make_float16(a), ieee, s);
3783
return float32_maybe_silence_nan(r);
3788
static uint32_t do_fcvt_f32_to_f16(float32 a, CPUARMState *env, float_status *s)
3790
int ieee = (env->vfp.xregs[ARM_VFP_FPSCR] & (1 << 26)) == 0;
3791
float16 r = float32_to_float16(a, ieee, s);
3793
r = float16_maybe_silence_nan(r);
3795
return float16_val(r);
3798
float32 HELPER(neon_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
3800
return do_fcvt_f16_to_f32(a, env, &env->vfp.standard_fp_status);
3803
uint32_t HELPER(neon_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
3805
return do_fcvt_f32_to_f16(a, env, &env->vfp.standard_fp_status);
3808
float32 HELPER(vfp_fcvt_f16_to_f32)(uint32_t a, CPUARMState *env)
3810
return do_fcvt_f16_to_f32(a, env, &env->vfp.fp_status);
3813
uint32_t HELPER(vfp_fcvt_f32_to_f16)(float32 a, CPUARMState *env)
3815
return do_fcvt_f32_to_f16(a, env, &env->vfp.fp_status);
3818
#define float32_two make_float32(0x40000000)
3819
#define float32_three make_float32(0x40400000)
3820
#define float32_one_point_five make_float32(0x3fc00000)
3822
float32 HELPER(recps_f32)(float32 a, float32 b, CPUARMState *env)
3824
float_status *s = &env->vfp.standard_fp_status;
3825
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
3826
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
3827
if (!(float32_is_zero(a) || float32_is_zero(b))) {
3828
float_raise(float_flag_input_denormal, s);
3832
return float32_sub(float32_two, float32_mul(a, b, s), s);
3835
float32 HELPER(rsqrts_f32)(float32 a, float32 b, CPUARMState *env)
3837
float_status *s = &env->vfp.standard_fp_status;
3839
if ((float32_is_infinity(a) && float32_is_zero_or_denormal(b)) ||
3840
(float32_is_infinity(b) && float32_is_zero_or_denormal(a))) {
3841
if (!(float32_is_zero(a) || float32_is_zero(b))) {
3842
float_raise(float_flag_input_denormal, s);
3844
return float32_one_point_five;
3846
product = float32_mul(a, b, s);
3847
return float32_div(float32_sub(float32_three, product, s), float32_two, s);
3852
/* Constants 256 and 512 are used in some helpers; we avoid relying on
3853
* int->float conversions at run-time. */
3854
#define float64_256 make_float64(0x4070000000000000LL)
3855
#define float64_512 make_float64(0x4080000000000000LL)
3857
/* The algorithm that must be used to calculate the estimate
3858
* is specified by the ARM ARM.
3860
static float64 recip_estimate(float64 a, CPUARMState *env)
3862
/* These calculations mustn't set any fp exception flags,
3863
* so we use a local copy of the fp_status.
3865
float_status dummy_status = env->vfp.standard_fp_status;
3866
float_status *s = &dummy_status;
3867
/* q = (int)(a * 512.0) */
3868
float64 q = float64_mul(float64_512, a, s);
3869
int64_t q_int = float64_to_int64_round_to_zero(q, s);
3871
/* r = 1.0 / (((double)q + 0.5) / 512.0) */
3872
q = int64_to_float64(q_int, s);
3873
q = float64_add(q, float64_half, s);
3874
q = float64_div(q, float64_512, s);
3875
q = float64_div(float64_one, q, s);
3877
/* s = (int)(256.0 * r + 0.5) */
3878
q = float64_mul(q, float64_256, s);
3879
q = float64_add(q, float64_half, s);
3880
q_int = float64_to_int64_round_to_zero(q, s);
3882
/* return (double)s / 256.0 */
3883
return float64_div(int64_to_float64(q_int, s), float64_256, s);
3886
float32 HELPER(recpe_f32)(float32 a, CPUARMState *env)
3888
float_status *s = &env->vfp.standard_fp_status;
3890
uint32_t val32 = float32_val(a);
3893
int a_exp = (val32 & 0x7f800000) >> 23;
3894
int sign = val32 & 0x80000000;
3896
if (float32_is_any_nan(a)) {
3897
if (float32_is_signaling_nan(a)) {
3898
float_raise(float_flag_invalid, s);
3900
return float32_default_nan;
3901
} else if (float32_is_infinity(a)) {
3902
return float32_set_sign(float32_zero, float32_is_neg(a));
3903
} else if (float32_is_zero_or_denormal(a)) {
3904
if (!float32_is_zero(a)) {
3905
float_raise(float_flag_input_denormal, s);
3907
float_raise(float_flag_divbyzero, s);
3908
return float32_set_sign(float32_infinity, float32_is_neg(a));
3909
} else if (a_exp >= 253) {
3910
float_raise(float_flag_underflow, s);
3911
return float32_set_sign(float32_zero, float32_is_neg(a));
3914
f64 = make_float64((0x3feULL << 52)
3915
| ((int64_t)(val32 & 0x7fffff) << 29));
3917
result_exp = 253 - a_exp;
3919
f64 = recip_estimate(f64, env);
3922
| ((result_exp & 0xff) << 23)
3923
| ((float64_val(f64) >> 29) & 0x7fffff);
3924
return make_float32(val32);
3927
/* The algorithm that must be used to calculate the estimate
3928
* is specified by the ARM ARM.
3930
static float64 recip_sqrt_estimate(float64 a, CPUARMState *env)
3932
/* These calculations mustn't set any fp exception flags,
3933
* so we use a local copy of the fp_status.
3935
float_status dummy_status = env->vfp.standard_fp_status;
3936
float_status *s = &dummy_status;
3940
if (float64_lt(a, float64_half, s)) {
3941
/* range 0.25 <= a < 0.5 */
3943
/* a in units of 1/512 rounded down */
3944
/* q0 = (int)(a * 512.0); */
3945
q = float64_mul(float64_512, a, s);
3946
q_int = float64_to_int64_round_to_zero(q, s);
3948
/* reciprocal root r */
3949
/* r = 1.0 / sqrt(((double)q0 + 0.5) / 512.0); */
3950
q = int64_to_float64(q_int, s);
3951
q = float64_add(q, float64_half, s);
3952
q = float64_div(q, float64_512, s);
3953
q = float64_sqrt(q, s);
3954
q = float64_div(float64_one, q, s);
3956
/* range 0.5 <= a < 1.0 */
3958
/* a in units of 1/256 rounded down */
3959
/* q1 = (int)(a * 256.0); */
3960
q = float64_mul(float64_256, a, s);
3961
int64_t q_int = float64_to_int64_round_to_zero(q, s);
3963
/* reciprocal root r */
3964
/* r = 1.0 /sqrt(((double)q1 + 0.5) / 256); */
3965
q = int64_to_float64(q_int, s);
3966
q = float64_add(q, float64_half, s);
3967
q = float64_div(q, float64_256, s);
3968
q = float64_sqrt(q, s);
3969
q = float64_div(float64_one, q, s);
3971
/* r in units of 1/256 rounded to nearest */
3972
/* s = (int)(256.0 * r + 0.5); */
3974
q = float64_mul(q, float64_256,s );
3975
q = float64_add(q, float64_half, s);
3976
q_int = float64_to_int64_round_to_zero(q, s);
3978
/* return (double)s / 256.0;*/
3979
return float64_div(int64_to_float64(q_int, s), float64_256, s);
3982
float32 HELPER(rsqrte_f32)(float32 a, CPUARMState *env)
3984
float_status *s = &env->vfp.standard_fp_status;
3990
val = float32_val(a);
3992
if (float32_is_any_nan(a)) {
3993
if (float32_is_signaling_nan(a)) {
3994
float_raise(float_flag_invalid, s);
3996
return float32_default_nan;
3997
} else if (float32_is_zero_or_denormal(a)) {
3998
if (!float32_is_zero(a)) {
3999
float_raise(float_flag_input_denormal, s);
4001
float_raise(float_flag_divbyzero, s);
4002
return float32_set_sign(float32_infinity, float32_is_neg(a));
4003
} else if (float32_is_neg(a)) {
4004
float_raise(float_flag_invalid, s);
4005
return float32_default_nan;
4006
} else if (float32_is_infinity(a)) {
4007
return float32_zero;
4010
/* Normalize to a double-precision value between 0.25 and 1.0,
4011
* preserving the parity of the exponent. */
4012
if ((val & 0x800000) == 0) {
4013
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
4015
| ((uint64_t)(val & 0x7fffff) << 29));
4017
f64 = make_float64(((uint64_t)(val & 0x80000000) << 32)
4019
| ((uint64_t)(val & 0x7fffff) << 29));
4022
result_exp = (380 - ((val & 0x7f800000) >> 23)) / 2;
4024
f64 = recip_sqrt_estimate(f64, env);
4026
val64 = float64_val(f64);
4028
val = ((result_exp & 0xff) << 23)
4029
| ((val64 >> 29) & 0x7fffff);
4030
return make_float32(val);
4033
uint32_t HELPER(recpe_u32)(uint32_t a, CPUARMState *env)
4037
if ((a & 0x80000000) == 0) {
4041
f64 = make_float64((0x3feULL << 52)
4042
| ((int64_t)(a & 0x7fffffff) << 21));
4044
f64 = recip_estimate (f64, env);
4046
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
4049
uint32_t HELPER(rsqrte_u32)(uint32_t a, CPUARMState *env)
4053
if ((a & 0xc0000000) == 0) {
4057
if (a & 0x80000000) {
4058
f64 = make_float64((0x3feULL << 52)
4059
| ((uint64_t)(a & 0x7fffffff) << 21));
4060
} else { /* bits 31-30 == '01' */
4061
f64 = make_float64((0x3fdULL << 52)
4062
| ((uint64_t)(a & 0x3fffffff) << 22));
4065
f64 = recip_sqrt_estimate(f64, env);
4067
return 0x80000000 | ((float64_val(f64) >> 21) & 0x7fffffff);
4070
/* VFPv4 fused multiply-accumulate */
4071
float32 VFP_HELPER(muladd, s)(float32 a, float32 b, float32 c, void *fpstp)
4073
float_status *fpst = fpstp;
4074
return float32_muladd(a, b, c, 0, fpst);
4077
float64 VFP_HELPER(muladd, d)(float64 a, float64 b, float64 c, void *fpstp)
4079
float_status *fpst = fpstp;
4080
return float64_muladd(a, b, c, 0, fpst);