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* ARM virtual CPU header
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* Copyright (c) 2003 Fabrice Bellard
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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#include "kvm-consts.h"
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#if defined(TARGET_AARCH64)
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/* AArch64 definitions */
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# define TARGET_LONG_BITS 64
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# define ELF_MACHINE EM_AARCH64
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# define TARGET_LONG_BITS 32
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# define ELF_MACHINE EM_ARM
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#define CPUArchState struct CPUARMState
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#include "qemu-common.h"
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#include "exec/cpu-defs.h"
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#include "fpu/softfloat.h"
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#define TARGET_HAS_ICE 1
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#define EXCP_UDEF 1 /* undefined instruction */
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#define EXCP_SWI 2 /* software interrupt */
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#define EXCP_PREFETCH_ABORT 3
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#define EXCP_DATA_ABORT 4
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#define EXCP_EXCEPTION_EXIT 8 /* Return from v7M exception. */
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#define EXCP_KERNEL_TRAP 9 /* Jumped to kernel code page. */
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#define EXCP_SMC 11 /* secure monitor call */
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#define ARMV7M_EXCP_RESET 1
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#define ARMV7M_EXCP_NMI 2
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#define ARMV7M_EXCP_HARD 3
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#define ARMV7M_EXCP_MEM 4
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#define ARMV7M_EXCP_BUS 5
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#define ARMV7M_EXCP_USAGE 6
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#define ARMV7M_EXCP_SVC 11
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#define ARMV7M_EXCP_DEBUG 12
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#define ARMV7M_EXCP_PENDSV 14
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#define ARMV7M_EXCP_SYSTICK 15
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/* ARM-specific interrupt pending bits. */
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#define CPU_INTERRUPT_FIQ CPU_INTERRUPT_TGT_EXT_1
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/* Meanings of the ARMCPU object's two inbound GPIO lines */
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typedef void ARMWriteCPFunc(void *opaque, int cp_info,
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int srcreg, int operand, uint32_t value);
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typedef uint32_t ARMReadCPFunc(void *opaque, int cp_info,
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int dstreg, int operand);
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#define NB_MMU_MODES 2
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/* We currently assume float and double are IEEE single and double
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precision respectively.
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Doing runtime conversions is tricky because VFP registers may contain
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integer values (eg. as the result of a FTOSI instruction).
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s<2n> maps to the least significant half of d<n>
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s<2n+1> maps to the most significant half of d<n>
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/* CPU state for each instance of a generic timer (in cp15 c14) */
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typedef struct ARMGenericTimer {
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uint64_t cval; /* Timer CompareValue register */
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uint32_t ctl; /* Timer Control register */
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/* Scale factor for generic timers, ie number of ns per tick.
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* This gives a 62.5MHz timer.
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#define GTIMER_SCALE 16
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typedef struct CPUARMState {
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/* Regs for current mode. */
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/* 32/64 switch only happens when taking and returning from
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* exceptions so the overlap semantics are taken care of then
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* instead of having a complicated union.
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/* Regs for A64 mode. */
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/* PSTATE isn't an architectural register for ARMv8. However, it is
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* convenient for us to assemble the underlying state into a 32 bit format
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* identical to the architectural format used for the SPSR. (This is also
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* what the Linux kernel's 'pstate' field in signal handlers and KVM's
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* 'pstate' register are.) Of the PSTATE bits:
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* NZCV are kept in the split out env->CF/VF/NF/ZF, (which have the same
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* semantics as for AArch32, as described in the comments on each field)
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* nRW (also known as M[4]) is kept, inverted, in env->aarch64
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* all other bits are stored in their correct places in env->pstate
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uint32_t aarch64; /* 1 if CPU is in aarch64 state; inverse of PSTATE.nRW */
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/* Frequently accessed CPSR bits are stored separately for efficiency.
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This contains all the other bits. Use cpsr_{read,write} to access
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uint32_t uncached_cpsr;
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/* Banked registers. */
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uint32_t banked_spsr[7];
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uint32_t banked_r13[7];
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uint32_t banked_r14[7];
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/* These hold r8-r12. */
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uint32_t usr_regs[5];
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uint32_t fiq_regs[5];
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/* cpsr flag cache for faster execution */
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uint32_t CF; /* 0 or 1 */
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uint32_t VF; /* V is the bit 31. All other bits are undefined */
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uint32_t NF; /* N is bit 31. All other bits are undefined. */
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uint32_t ZF; /* Z set if zero. */
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uint32_t QF; /* 0 or 1 */
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uint32_t GE; /* cpsr[19:16] */
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uint32_t thumb; /* cpsr[5]. 0 = arm mode, 1 = thumb mode. */
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uint32_t condexec_bits; /* IT bits. cpsr[15:10,26:25]. */
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/* System control coprocessor (cp15) */
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uint32_t c0_cssel; /* Cache size selection. */
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uint32_t c1_sys; /* System control register. */
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uint32_t c1_coproc; /* Coprocessor access register. */
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uint32_t c1_xscaleauxcr; /* XScale auxiliary control register. */
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uint32_t c1_scr; /* secure config register. */
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uint32_t c1_sedbg; /* Secure debug enable register. */
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uint32_t c1_nseac; /* Non-secure access control register. */
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uint32_t c2_base0; /* MMU translation table base 0. */
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uint32_t c2_base0_hi; /* MMU translation table base 0, high 32 bits */
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uint32_t c2_base1; /* MMU translation table base 0. */
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uint32_t c2_base1_hi; /* MMU translation table base 1, high 32 bits */
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uint32_t c2_control; /* MMU translation table base control. */
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uint32_t c2_mask; /* MMU translation table base selection mask. */
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uint32_t c2_base_mask; /* MMU translation table base 0 mask. */
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uint32_t c2_data; /* MPU data cachable bits. */
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uint32_t c2_insn; /* MPU instruction cachable bits. */
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uint32_t c3; /* MMU domain access control register
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MPU write buffer control. */
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uint32_t c5_insn; /* Fault status registers. */
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uint32_t c6_region[8]; /* MPU base/size registers. */
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uint32_t c6_insn; /* Fault address registers. */
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uint32_t c7_par; /* Translation result. */
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uint32_t c7_par_hi; /* Translation result, high 32 bits */
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uint32_t c9_insn; /* Cache lockdown registers. */
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uint32_t c9_pmcr; /* performance monitor control register */
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uint32_t c9_pmcnten; /* perf monitor counter enables */
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uint32_t c9_pmovsr; /* perf monitor overflow status */
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uint32_t c9_pmxevtyper; /* perf monitor event type */
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uint32_t c9_pmuserenr; /* perf monitor user enable */
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uint32_t c9_pminten; /* perf monitor interrupt enables */
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uint32_t c12_vbar; /* vector base address register */
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uint32_t c12_mvbar; /* monitor vector base address register. */
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uint32_t c13_fcse; /* FCSE PID. */
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uint32_t c13_context; /* Context ID. */
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uint32_t c13_tls1; /* User RW Thread register. */
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uint32_t c13_tls2; /* User RO Thread register. */
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uint32_t c13_tls3; /* Privileged Thread register. */
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uint32_t c14_cntfrq; /* Counter Frequency register */
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uint32_t c14_cntkctl; /* Timer Control register */
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ARMGenericTimer c14_timer[NUM_GTIMERS];
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uint32_t c15_cpar; /* XScale Coprocessor Access Register */
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uint32_t c15_ticonfig; /* TI925T configuration byte. */
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uint32_t c15_i_max; /* Maximum D-cache dirty line index. */
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uint32_t c15_i_min; /* Minimum D-cache dirty line index. */
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uint32_t c15_threadid; /* TI debugger thread-ID. */
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uint32_t c15_config_base_address; /* SCU base address. */
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uint32_t c15_diagnostic; /* diagnostic register */
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uint32_t c15_power_diagnostic;
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uint32_t c15_power_control; /* power control */
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/* System registers (AArch64) */
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int pending_exception;
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/* Thumb-2 EE state. */
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/* VFP coprocessor state. */
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/* VFP/Neon register state. Note that the mapping between S, D and Q
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* views of the register bank differs between AArch64 and AArch32:
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* Qn = regs[2n+1]:regs[2n]
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* Sn = regs[n/2] bits 31..0 for even n, and bits 63..32 for odd n
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* (and regs[32] to regs[63] are inaccessible)
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* Qn = regs[2n+1]:regs[2n]
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* Sn = regs[2n] bits 31..0
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* This corresponds to the architecturally defined mapping between
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* the two execution states, and means we do not need to explicitly
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* map these registers when changing states.
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/* We store these fpcsr fields separately for convenience. */
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/* scratch space when Tn are not sufficient. */
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/* fp_status is the "normal" fp status. standard_fp_status retains
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* values corresponding to the ARM "Standard FPSCR Value", ie
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* default-NaN, flush-to-zero, round-to-nearest and is used by
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* any operations (generally Neon) which the architecture defines
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* as controlled by the standard FPSCR value rather than the FPSCR.
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* To avoid having to transfer exception bits around, we simply
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* say that the FPSCR cumulative exception flags are the logical
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* OR of the flags in the two fp statuses. This relies on the
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* only thing which needs to read the exception flags being
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* an explicit FPSCR read.
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float_status fp_status;
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float_status standard_fp_status;
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uint32_t exclusive_addr;
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uint32_t exclusive_val;
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uint32_t exclusive_high;
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#if defined(CONFIG_USER_ONLY)
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uint32_t exclusive_test;
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uint32_t exclusive_info;
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/* iwMMXt coprocessor state. */
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/* For mixed endian mode. */
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#if defined(CONFIG_USER_ONLY)
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/* For usermode syscall translation. */
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/* These fields after the common ones so they are preserved on reset. */
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/* Internal CPU feature flags. */
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const struct arm_boot_info *boot_info;
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ARMCPU *cpu_arm_init(const char *cpu_model);
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void arm_translate_init(void);
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void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu);
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int cpu_arm_exec(CPUARMState *s);
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int bank_number(int mode);
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void switch_mode(CPUARMState *, int);
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uint32_t do_arm_semihosting(CPUARMState *env);
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static inline bool is_a64(CPUARMState *env)
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/* you can call this signal handler from your SIGBUS and SIGSEGV
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signal handlers to inform the virtual CPU of exceptions. non zero
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is returned if the signal was handled by the virtual CPU. */
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int cpu_arm_signal_handler(int host_signum, void *pinfo,
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int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw,
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#define cpu_handle_mmu_fault cpu_arm_handle_mmu_fault
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#define CPSR_M (0x1fU)
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#define CPSR_T (1U << 5)
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#define CPSR_F (1U << 6)
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#define CPSR_I (1U << 7)
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#define CPSR_A (1U << 8)
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#define CPSR_E (1U << 9)
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#define CPSR_IT_2_7 (0xfc00U)
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#define CPSR_GE (0xfU << 16)
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#define CPSR_RESERVED (0xfU << 20)
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#define CPSR_J (1U << 24)
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#define CPSR_IT_0_1 (3U << 25)
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#define CPSR_Q (1U << 27)
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#define CPSR_V (1U << 28)
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#define CPSR_C (1U << 29)
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#define CPSR_Z (1U << 30)
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#define CPSR_N (1U << 31)
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#define CPSR_NZCV (CPSR_N | CPSR_Z | CPSR_C | CPSR_V)
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#define CPSR_IT (CPSR_IT_0_1 | CPSR_IT_2_7)
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#define CACHED_CPSR_BITS (CPSR_T | CPSR_GE | CPSR_IT | CPSR_Q | CPSR_NZCV)
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/* Bits writable in user mode. */
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#define CPSR_USER (CPSR_NZCV | CPSR_Q | CPSR_GE)
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/* Execution state bits. MRS read as zero, MSR writes ignored. */
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#define CPSR_EXEC (CPSR_T | CPSR_IT | CPSR_J)
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/* Bit definitions for ARMv8 SPSR (PSTATE) format.
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* Only these are valid when in AArch64 mode; in
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* AArch32 mode SPSRs are basically CPSR-format.
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#define PSTATE_M (0xFU)
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#define PSTATE_nRW (1U << 4)
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#define PSTATE_F (1U << 6)
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#define PSTATE_I (1U << 7)
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#define PSTATE_A (1U << 8)
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#define PSTATE_D (1U << 9)
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#define PSTATE_IL (1U << 20)
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#define PSTATE_SS (1U << 21)
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#define PSTATE_V (1U << 28)
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#define PSTATE_C (1U << 29)
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#define PSTATE_Z (1U << 30)
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#define PSTATE_N (1U << 31)
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#define PSTATE_NZCV (PSTATE_N | PSTATE_Z | PSTATE_C | PSTATE_V)
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#define CACHED_PSTATE_BITS (PSTATE_NZCV)
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/* Mode values for AArch64 */
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#define PSTATE_MODE_EL3h 13
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#define PSTATE_MODE_EL3t 12
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#define PSTATE_MODE_EL2h 9
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#define PSTATE_MODE_EL2t 8
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#define PSTATE_MODE_EL1h 5
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#define PSTATE_MODE_EL1t 4
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#define PSTATE_MODE_EL0t 0
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/* Return the current PSTATE value. For the moment we don't support 32<->64 bit
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* interprocessing, so we don't attempt to sync with the cpsr state used by
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* the 32 bit decoder.
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static inline uint32_t pstate_read(CPUARMState *env)
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return (env->NF & 0x80000000) | (ZF << 30)
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| (env->CF << 29) | ((env->VF & 0x80000000) >> 3)
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static inline void pstate_write(CPUARMState *env, uint32_t val)
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env->ZF = (~val) & PSTATE_Z;
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env->CF = (val >> 29) & 1;
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env->VF = (val << 3) & 0x80000000;
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env->pstate = val & ~CACHED_PSTATE_BITS;
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/* Return the current CPSR value. */
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uint32_t cpsr_read(CPUARMState *env);
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/* Set the CPSR. Note that some bits of mask must be all-set or all-clear. */
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void cpsr_write(CPUARMState *env, uint32_t val, uint32_t mask);
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/* Return the current xPSR value. */
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static inline uint32_t xpsr_read(CPUARMState *env)
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return (env->NF & 0x80000000) | (ZF << 30)
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| (env->CF << 29) | ((env->VF & 0x80000000) >> 3) | (env->QF << 27)
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| (env->thumb << 24) | ((env->condexec_bits & 3) << 25)
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| ((env->condexec_bits & 0xfc) << 8)
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| env->v7m.exception;
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/* Set the xPSR. Note that some bits of mask must be all-set or all-clear. */
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static inline void xpsr_write(CPUARMState *env, uint32_t val, uint32_t mask)
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if (mask & CPSR_NZCV) {
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env->ZF = (~val) & CPSR_Z;
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env->CF = (val >> 29) & 1;
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env->VF = (val << 3) & 0x80000000;
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env->QF = ((val & CPSR_Q) != 0);
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if (mask & (1 << 24))
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env->thumb = ((val & (1 << 24)) != 0);
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if (mask & CPSR_IT_0_1) {
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env->condexec_bits &= ~3;
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env->condexec_bits |= (val >> 25) & 3;
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if (mask & CPSR_IT_2_7) {
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env->condexec_bits &= 3;
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env->condexec_bits |= (val >> 8) & 0xfc;
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env->v7m.exception = val & 0x1ff;
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/* Return the current FPSCR value. */
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uint32_t vfp_get_fpscr(CPUARMState *env);
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void vfp_set_fpscr(CPUARMState *env, uint32_t val);
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ARM_CPU_MODE_USR = 0x10,
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ARM_CPU_MODE_FIQ = 0x11,
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ARM_CPU_MODE_IRQ = 0x12,
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ARM_CPU_MODE_SVC = 0x13,
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ARM_CPU_MODE_SMC = 0x16,
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ARM_CPU_MODE_ABT = 0x17,
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ARM_CPU_MODE_UND = 0x1b,
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ARM_CPU_MODE_SYS = 0x1f
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/* VFP system registers. */
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#define ARM_VFP_FPSID 0
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#define ARM_VFP_FPSCR 1
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#define ARM_VFP_MVFR1 6
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#define ARM_VFP_MVFR0 7
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#define ARM_VFP_FPEXC 8
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#define ARM_VFP_FPINST 9
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#define ARM_VFP_FPINST2 10
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/* iwMMXt coprocessor control registers. */
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#define ARM_IWMMXT_wCID 0
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#define ARM_IWMMXT_wCon 1
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#define ARM_IWMMXT_wCSSF 2
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#define ARM_IWMMXT_wCASF 3
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#define ARM_IWMMXT_wCGR0 8
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#define ARM_IWMMXT_wCGR1 9
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#define ARM_IWMMXT_wCGR2 10
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#define ARM_IWMMXT_wCGR3 11
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/* If adding a feature bit which corresponds to a Linux ELF
485
* HWCAP bit, remember to update the feature-bit-to-hwcap
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* mapping in linux-user/elfload.c:get_elf_hwcap().
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ARM_FEATURE_AUXCR, /* ARM1026 Auxiliary control register. */
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ARM_FEATURE_XSCALE, /* Intel XScale extensions. */
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ARM_FEATURE_IWMMXT, /* Intel iwMMXt extension. */
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ARM_FEATURE_MPU, /* Only has Memory Protection Unit, not full MMU. */
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ARM_FEATURE_VFP_FP16,
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ARM_FEATURE_THUMB_DIV, /* divide supported in Thumb encoding */
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ARM_FEATURE_M, /* Microcontroller profile. */
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ARM_FEATURE_OMAPCP, /* OMAP specific CP15 ops handling. */
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ARM_FEATURE_THUMB2EE,
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ARM_FEATURE_V7MP, /* v7 Multiprocessing Extensions */
508
ARM_FEATURE_STRONGARM,
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ARM_FEATURE_VAPA, /* cp15 VA to PA lookups */
510
ARM_FEATURE_ARM_DIV, /* divide supported in ARM encoding */
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ARM_FEATURE_VFP4, /* VFPv4 (implies that NEON is v2) */
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ARM_FEATURE_GENERIC_TIMER,
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ARM_FEATURE_MVFR, /* Media and VFP Feature Registers 0 and 1 */
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ARM_FEATURE_DUMMY_C15_REGS, /* RAZ/WI all of cp15 crn=15 */
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ARM_FEATURE_CACHE_TEST_CLEAN, /* 926/1026 style test-and-clean ops */
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ARM_FEATURE_CACHE_DIRTY_REG, /* 1136/1176 cache dirty status register */
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ARM_FEATURE_CACHE_BLOCK_OPS, /* v6 optional cache block operations */
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ARM_FEATURE_MPIDR, /* has cp15 MPIDR */
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ARM_FEATURE_PXN, /* has Privileged Execute Never bit */
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ARM_FEATURE_LPAE, /* has Large Physical Address Extension */
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ARM_FEATURE_AARCH64, /* supports 64 bit mode */
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ARM_FEATURE_TRUSTZONE, /* TrustZone Security Extensions. */
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static inline int arm_feature(CPUARMState *env, int feature)
528
return (env->features & (1ULL << feature)) != 0;
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void arm_cpu_list(FILE *f, fprintf_function cpu_fprintf);
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/* Interface between CPU and Interrupt controller. */
534
void armv7m_nvic_set_pending(void *opaque, int irq);
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int armv7m_nvic_acknowledge_irq(void *opaque);
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void armv7m_nvic_complete_irq(void *opaque, int irq);
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/* Interface for defining coprocessor registers.
539
* Registers are defined in tables of arm_cp_reginfo structs
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* which are passed to define_arm_cp_regs().
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/* When looking up a coprocessor register we look for it
544
* via an integer which encodes all of:
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* Crn, Crm, opc1, opc2 fields
547
* 32 or 64 bit register (ie is it accessed via MRC/MCR
549
* We allow 4 bits for opc1 because MRRC/MCRR have a 4 bit field.
550
* (In this case crn and opc2 should be zero.)
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#define ENCODE_CP_REG(cp, is64, crn, crm, opc1, opc2) \
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(((cp) << 16) | ((is64) << 15) | ((crn) << 11) | \
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((crm) << 7) | ((opc1) << 3) | (opc2))
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/* Convert a full 64 bit KVM register ID to the truncated 32 bit
557
* version used as a key for the coprocessor register hashtable
559
static inline uint32_t kvm_to_cpreg_id(uint64_t kvmid)
561
uint32_t cpregid = kvmid;
562
if ((kvmid & CP_REG_SIZE_MASK) == CP_REG_SIZE_U64) {
563
cpregid |= (1 << 15);
568
/* Convert a truncated 32 bit hashtable key into the full
569
* 64 bit KVM register ID.
571
static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid)
573
uint64_t kvmid = cpregid & ~(1 << 15);
574
if (cpregid & (1 << 15)) {
575
kvmid |= CP_REG_SIZE_U64 | CP_REG_ARM;
577
kvmid |= CP_REG_SIZE_U32 | CP_REG_ARM;
582
/* ARMCPRegInfo type field bits. If the SPECIAL bit is set this is a
583
* special-behaviour cp reg and bits [15..8] indicate what behaviour
584
* it has. Otherwise it is a simple cp reg, where CONST indicates that
585
* TCG can assume the value to be constant (ie load at translate time)
586
* and 64BIT indicates a 64 bit wide coprocessor register. SUPPRESS_TB_END
587
* indicates that the TB should not be ended after a write to this register
588
* (the default is that the TB ends after cp writes). OVERRIDE permits
589
* a register definition to override a previous definition for the
590
* same (cp, is64, crn, crm, opc1, opc2) tuple: either the new or the
591
* old must have the OVERRIDE bit set.
592
* NO_MIGRATE indicates that this register should be ignored for migration;
593
* (eg because any state is accessed via some other coprocessor register).
594
* IO indicates that this register does I/O and therefore its accesses
595
* need to be surrounded by gen_io_start()/gen_io_end(). In particular,
596
* registers which implement clocks or timers require this.
598
#define ARM_CP_SPECIAL 1
599
#define ARM_CP_CONST 2
600
#define ARM_CP_64BIT 4
601
#define ARM_CP_SUPPRESS_TB_END 8
602
#define ARM_CP_OVERRIDE 16
603
#define ARM_CP_NO_MIGRATE 32
605
#define ARM_CP_NOP (ARM_CP_SPECIAL | (1 << 8))
606
#define ARM_CP_WFI (ARM_CP_SPECIAL | (2 << 8))
607
#define ARM_LAST_SPECIAL ARM_CP_WFI
608
/* Used only as a terminator for ARMCPRegInfo lists */
609
#define ARM_CP_SENTINEL 0xffff
610
/* Mask of only the flag bits in a type field */
611
#define ARM_CP_FLAG_MASK 0x7f
613
/* Return true if cptype is a valid type field. This is used to try to
614
* catch errors where the sentinel has been accidentally left off the end
615
* of a list of registers.
617
static inline bool cptype_valid(int cptype)
619
return ((cptype & ~ARM_CP_FLAG_MASK) == 0)
620
|| ((cptype & ARM_CP_SPECIAL) &&
621
((cptype & ~ARM_CP_FLAG_MASK) <= ARM_LAST_SPECIAL));
625
* We define bits for Read and Write access for what rev C of the v7-AR ARM ARM
626
* defines as PL0 (user), PL1 (fiq/irq/svc/abt/und/sys, ie privileged), and
627
* PL2 (hyp). The other level which has Read and Write bits is Secure PL1
628
* (ie any of the privileged modes in Secure state, or Monitor mode).
629
* If a register is accessible in one privilege level it's always accessible
630
* in higher privilege levels too. Since "Secure PL1" also follows this rule
631
* (ie anything visible in PL2 is visible in S-PL1, some things are only
632
* visible in S-PL1) but "Secure PL1" is a bit of a mouthful, we bend the
633
* terminology a little and call this PL3.
635
* If access permissions for a register are more complex than can be
636
* described with these bits, then use a laxer set of restrictions, and
637
* do the more restrictive/complex check inside a helper function.
641
#define PL2_R (0x20 | PL3_R)
642
#define PL2_W (0x10 | PL3_W)
643
#define PL1_R (0x08 | PL2_R)
644
#define PL1_W (0x04 | PL2_W)
645
#define PL0_R (0x02 | PL1_R)
646
#define PL0_W (0x01 | PL1_W)
648
#define PL3_RW (PL3_R | PL3_W)
649
#define PL2_RW (PL2_R | PL2_W)
650
#define PL1_RW (PL1_R | PL1_W)
651
#define PL0_RW (PL0_R | PL0_W)
653
static inline int arm_current_pl(CPUARMState *env)
655
if ((env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_USR) {
658
/* We don't currently implement the Virtualization or TrustZone
659
* extensions, so PL2 and PL3 don't exist for us.
664
typedef struct ARMCPRegInfo ARMCPRegInfo;
666
/* Access functions for coprocessor registers. These should return
667
* 0 on success, or one of the EXCP_* constants if access should cause
668
* an exception (in which case *value is not written).
670
typedef int CPReadFn(CPUARMState *env, const ARMCPRegInfo *opaque,
672
typedef int CPWriteFn(CPUARMState *env, const ARMCPRegInfo *opaque,
674
/* Hook function for register reset */
675
typedef void CPResetFn(CPUARMState *env, const ARMCPRegInfo *opaque);
679
/* Definition of an ARM coprocessor register */
680
struct ARMCPRegInfo {
681
/* Name of register (useful mainly for debugging, need not be unique) */
683
/* Location of register: coprocessor number and (crn,crm,opc1,opc2)
684
* tuple. Any of crm, opc1 and opc2 may be CP_ANY to indicate a
685
* 'wildcard' field -- any value of that field in the MRC/MCR insn
686
* will be decoded to this register. The register read and write
687
* callbacks will be passed an ARMCPRegInfo with the crn/crm/opc1/opc2
688
* used by the program, so it is possible to register a wildcard and
689
* then behave differently on read/write if necessary.
690
* For 64 bit registers, only crm and opc1 are relevant; crn and opc2
698
/* Register type: ARM_CP_* bits/values */
700
/* Access rights: PL*_[RW] */
702
/* The opaque pointer passed to define_arm_cp_regs_with_opaque() when
703
* this register was defined: can be used to hand data through to the
704
* register read/write functions, since they are passed the ARMCPRegInfo*.
707
/* Value of this register, if it is ARM_CP_CONST. Otherwise, if
708
* fieldoffset is non-zero, the reset value of the register.
711
/* Offset of the field in CPUARMState for this register. This is not
713
* 1. type is ARM_CP_CONST or one of the ARM_CP_SPECIALs
714
* 2. both readfn and writefn are specified
716
ptrdiff_t fieldoffset; /* offsetof(CPUARMState, field) */
717
/* Function for handling reads of this register. If NULL, then reads
718
* will be done by loading from the offset into CPUARMState specified
722
/* Function for handling writes of this register. If NULL, then writes
723
* will be done by writing to the offset into CPUARMState specified
727
/* Function for doing a "raw" read; used when we need to copy
728
* coprocessor state to the kernel for KVM or out for
729
* migration. This only needs to be provided if there is also a
730
* readfn and it makes an access permission check.
732
CPReadFn *raw_readfn;
733
/* Function for doing a "raw" write; used when we need to copy KVM
734
* kernel coprocessor state into userspace, or for inbound
735
* migration. This only needs to be provided if there is also a
736
* writefn and it makes an access permission check or masks out
737
* "unwritable" bits or has write-one-to-clear or similar behaviour.
739
CPWriteFn *raw_writefn;
740
/* Function for resetting the register. If NULL, then reset will be done
741
* by writing resetvalue to the field specified in fieldoffset. If
742
* fieldoffset is 0 then no reset will be done.
747
/* Macros which are lvalues for the field in CPUARMState for the
750
#define CPREG_FIELD32(env, ri) \
751
(*(uint32_t *)((char *)(env) + (ri)->fieldoffset))
752
#define CPREG_FIELD64(env, ri) \
753
(*(uint64_t *)((char *)(env) + (ri)->fieldoffset))
755
#define REGINFO_SENTINEL { .type = ARM_CP_SENTINEL }
757
void define_arm_cp_regs_with_opaque(ARMCPU *cpu,
758
const ARMCPRegInfo *regs, void *opaque);
759
void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
760
const ARMCPRegInfo *regs, void *opaque);
761
static inline void define_arm_cp_regs(ARMCPU *cpu, const ARMCPRegInfo *regs)
763
define_arm_cp_regs_with_opaque(cpu, regs, 0);
765
static inline void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs)
767
define_one_arm_cp_reg_with_opaque(cpu, regs, 0);
769
const ARMCPRegInfo *get_arm_cp_reginfo(ARMCPU *cpu, uint32_t encoded_cp);
771
/* CPWriteFn that can be used to implement writes-ignored behaviour */
772
int arm_cp_write_ignore(CPUARMState *env, const ARMCPRegInfo *ri,
774
/* CPReadFn that can be used for read-as-zero behaviour */
775
int arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t *value);
777
static inline bool cp_access_ok(CPUARMState *env,
778
const ARMCPRegInfo *ri, int isread)
780
return (ri->access >> ((arm_current_pl(env) * 2) + isread)) & 1;
784
* write_list_to_cpustate
787
* For each register listed in the ARMCPU cpreg_indexes list, write
788
* its value from the cpreg_values list into the ARMCPUState structure.
789
* This updates TCG's working data structures from KVM data or
790
* from incoming migration state.
792
* Returns: true if all register values were updated correctly,
793
* false if some register was unknown or could not be written.
794
* Note that we do not stop early on failure -- we will attempt
795
* writing all registers in the list.
797
bool write_list_to_cpustate(ARMCPU *cpu);
800
* write_cpustate_to_list:
803
* For each register listed in the ARMCPU cpreg_indexes list, write
804
* its value from the ARMCPUState structure into the cpreg_values list.
805
* This is used to copy info from TCG's working data structures into
806
* KVM or for outbound migration.
808
* Returns: true if all register values were read correctly,
809
* false if some register was unknown or could not be read.
810
* Note that we do not stop early on failure -- we will attempt
811
* reading all registers in the list.
813
bool write_cpustate_to_list(ARMCPU *cpu);
815
/* Does the core conform to the the "MicroController" profile. e.g. Cortex-M3.
816
Note the M in older cores (eg. ARM7TDMI) stands for Multiply. These are
817
conventional cores (ie. Application or Realtime profile). */
819
#define IS_M(env) arm_feature(env, ARM_FEATURE_M)
821
#define ARM_CPUID_TI915T 0x54029152
822
#define ARM_CPUID_TI925T 0x54029252
824
#if defined(CONFIG_USER_ONLY)
825
#define TARGET_PAGE_BITS 12
827
/* The ARM MMU allows 1k pages. */
828
/* ??? Linux doesn't actually use these, and they're deprecated in recent
829
architecture revisions. Maybe a configure option to disable them. */
830
#define TARGET_PAGE_BITS 10
833
#if defined(TARGET_AARCH64)
834
# define TARGET_PHYS_ADDR_SPACE_BITS 48
835
# define TARGET_VIRT_ADDR_SPACE_BITS 64
837
# define TARGET_PHYS_ADDR_SPACE_BITS 40
838
# define TARGET_VIRT_ADDR_SPACE_BITS 32
841
static inline CPUARMState *cpu_init(const char *cpu_model)
843
ARMCPU *cpu = cpu_arm_init(cpu_model);
850
#define cpu_exec cpu_arm_exec
851
#define cpu_gen_code cpu_arm_gen_code
852
#define cpu_signal_handler cpu_arm_signal_handler
853
#define cpu_list arm_cpu_list
855
/* MMU modes definitions */
856
#define MMU_MODE0_SUFFIX _kernel
857
#define MMU_MODE1_SUFFIX _user
858
#define MMU_USER_IDX 1
859
static inline int cpu_mmu_index (CPUARMState *env)
861
return (env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_USR ? 1 : 0;
864
#include "exec/cpu-all.h"
866
/* Bit usage in the TB flags field: bit 31 indicates whether we are
867
* in 32 or 64 bit mode. The meaning of the other bits depends on that.
869
#define ARM_TBFLAG_AARCH64_STATE_SHIFT 31
870
#define ARM_TBFLAG_AARCH64_STATE_MASK (1U << ARM_TBFLAG_AARCH64_STATE_SHIFT)
872
/* Bit usage when in AArch32 state: */
873
#define ARM_TBFLAG_THUMB_SHIFT 0
874
#define ARM_TBFLAG_THUMB_MASK (1 << ARM_TBFLAG_THUMB_SHIFT)
875
#define ARM_TBFLAG_VECLEN_SHIFT 1
876
#define ARM_TBFLAG_VECLEN_MASK (0x7 << ARM_TBFLAG_VECLEN_SHIFT)
877
#define ARM_TBFLAG_VECSTRIDE_SHIFT 4
878
#define ARM_TBFLAG_VECSTRIDE_MASK (0x3 << ARM_TBFLAG_VECSTRIDE_SHIFT)
879
#define ARM_TBFLAG_PRIV_SHIFT 6
880
#define ARM_TBFLAG_PRIV_MASK (1 << ARM_TBFLAG_PRIV_SHIFT)
881
#define ARM_TBFLAG_VFPEN_SHIFT 7
882
#define ARM_TBFLAG_VFPEN_MASK (1 << ARM_TBFLAG_VFPEN_SHIFT)
883
#define ARM_TBFLAG_CONDEXEC_SHIFT 8
884
#define ARM_TBFLAG_CONDEXEC_MASK (0xff << ARM_TBFLAG_CONDEXEC_SHIFT)
885
#define ARM_TBFLAG_BSWAP_CODE_SHIFT 16
886
#define ARM_TBFLAG_BSWAP_CODE_MASK (1 << ARM_TBFLAG_BSWAP_CODE_SHIFT)
888
/* Bit usage when in AArch64 state: currently no bits defined */
890
/* some convenience accessor macros */
891
#define ARM_TBFLAG_AARCH64_STATE(F) \
892
(((F) & ARM_TBFLAG_AARCH64_STATE_MASK) >> ARM_TBFLAG_AARCH64_STATE_SHIFT)
893
#define ARM_TBFLAG_THUMB(F) \
894
(((F) & ARM_TBFLAG_THUMB_MASK) >> ARM_TBFLAG_THUMB_SHIFT)
895
#define ARM_TBFLAG_VECLEN(F) \
896
(((F) & ARM_TBFLAG_VECLEN_MASK) >> ARM_TBFLAG_VECLEN_SHIFT)
897
#define ARM_TBFLAG_VECSTRIDE(F) \
898
(((F) & ARM_TBFLAG_VECSTRIDE_MASK) >> ARM_TBFLAG_VECSTRIDE_SHIFT)
899
#define ARM_TBFLAG_PRIV(F) \
900
(((F) & ARM_TBFLAG_PRIV_MASK) >> ARM_TBFLAG_PRIV_SHIFT)
901
#define ARM_TBFLAG_VFPEN(F) \
902
(((F) & ARM_TBFLAG_VFPEN_MASK) >> ARM_TBFLAG_VFPEN_SHIFT)
903
#define ARM_TBFLAG_CONDEXEC(F) \
904
(((F) & ARM_TBFLAG_CONDEXEC_MASK) >> ARM_TBFLAG_CONDEXEC_SHIFT)
905
#define ARM_TBFLAG_BSWAP_CODE(F) \
906
(((F) & ARM_TBFLAG_BSWAP_CODE_MASK) >> ARM_TBFLAG_BSWAP_CODE_SHIFT)
908
static inline void cpu_get_tb_cpu_state(CPUARMState *env, target_ulong *pc,
909
target_ulong *cs_base, int *flags)
913
*flags = ARM_TBFLAG_AARCH64_STATE_MASK;
917
*flags = (env->thumb << ARM_TBFLAG_THUMB_SHIFT)
918
| (env->vfp.vec_len << ARM_TBFLAG_VECLEN_SHIFT)
919
| (env->vfp.vec_stride << ARM_TBFLAG_VECSTRIDE_SHIFT)
920
| (env->condexec_bits << ARM_TBFLAG_CONDEXEC_SHIFT)
921
| (env->bswap_code << ARM_TBFLAG_BSWAP_CODE_SHIFT);
922
if (arm_feature(env, ARM_FEATURE_M)) {
923
privmode = !((env->v7m.exception == 0) && (env->v7m.control & 1));
925
privmode = (env->uncached_cpsr & CPSR_M) != ARM_CPU_MODE_USR;
928
*flags |= ARM_TBFLAG_PRIV_MASK;
930
if (env->vfp.xregs[ARM_VFP_FPEXC] & (1 << 30)) {
931
*flags |= ARM_TBFLAG_VFPEN_MASK;
938
static inline bool cpu_has_work(CPUState *cpu)
940
return cpu->interrupt_request &
941
(CPU_INTERRUPT_FIQ | CPU_INTERRUPT_HARD | CPU_INTERRUPT_EXITTB);
944
#include "exec/exec-all.h"
946
static inline void cpu_pc_from_tb(CPUARMState *env, TranslationBlock *tb)
948
if (ARM_TBFLAG_AARCH64_STATE(tb->flags)) {
951
env->regs[15] = tb->pc;
955
/* Load an instruction and return it in the standard little-endian order */
956
static inline uint32_t arm_ldl_code(CPUARMState *env, target_ulong addr,
959
uint32_t insn = cpu_ldl_code(env, addr);
961
return bswap32(insn);
966
/* Ditto, for a halfword (Thumb) instruction */
967
static inline uint16_t arm_lduw_code(CPUARMState *env, target_ulong addr,
970
uint16_t insn = cpu_lduw_code(env, addr);
972
return bswap16(insn);