491 lines
16 KiB
C
491 lines
16 KiB
C
/*
|
|
* QEMU ARM CPU -- internal functions and types
|
|
*
|
|
* Copyright (c) 2014 Linaro Ltd
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see
|
|
* <http://www.gnu.org/licenses/gpl-2.0.html>
|
|
*
|
|
* This header defines functions, types, etc which need to be shared
|
|
* between different source files within target-arm/ but which are
|
|
* private to it and not required by the rest of QEMU.
|
|
*/
|
|
|
|
#ifndef TARGET_ARM_INTERNALS_H
|
|
#define TARGET_ARM_INTERNALS_H
|
|
|
|
/* register banks for CPU modes */
|
|
#define BANK_USRSYS 0
|
|
#define BANK_SVC 1
|
|
#define BANK_ABT 2
|
|
#define BANK_UND 3
|
|
#define BANK_IRQ 4
|
|
#define BANK_FIQ 5
|
|
#define BANK_HYP 6
|
|
#define BANK_MON 7
|
|
|
|
static inline bool excp_is_internal(int excp)
|
|
{
|
|
/* Return true if this exception number represents a QEMU-internal
|
|
* exception that will not be passed to the guest.
|
|
*/
|
|
return excp == EXCP_INTERRUPT
|
|
|| excp == EXCP_HLT
|
|
|| excp == EXCP_DEBUG
|
|
|| excp == EXCP_HALTED
|
|
|| excp == EXCP_EXCEPTION_EXIT
|
|
|| excp == EXCP_KERNEL_TRAP
|
|
|| excp == EXCP_SEMIHOST
|
|
|| excp == EXCP_STREX;
|
|
}
|
|
|
|
/* Exception names for debug logging; note that not all of these
|
|
* precisely correspond to architectural exceptions.
|
|
*/
|
|
static const char * const excnames[] = {
|
|
[EXCP_UDEF] = "Undefined Instruction",
|
|
[EXCP_SWI] = "SVC",
|
|
[EXCP_PREFETCH_ABORT] = "Prefetch Abort",
|
|
[EXCP_DATA_ABORT] = "Data Abort",
|
|
[EXCP_IRQ] = "IRQ",
|
|
[EXCP_FIQ] = "FIQ",
|
|
[EXCP_BKPT] = "Breakpoint",
|
|
[EXCP_EXCEPTION_EXIT] = "QEMU v7M exception exit",
|
|
[EXCP_KERNEL_TRAP] = "QEMU intercept of kernel commpage",
|
|
[EXCP_STREX] = "QEMU intercept of STREX",
|
|
[EXCP_HVC] = "Hypervisor Call",
|
|
[EXCP_HYP_TRAP] = "Hypervisor Trap",
|
|
[EXCP_SMC] = "Secure Monitor Call",
|
|
[EXCP_VIRQ] = "Virtual IRQ",
|
|
[EXCP_VFIQ] = "Virtual FIQ",
|
|
[EXCP_SEMIHOST] = "Semihosting call",
|
|
};
|
|
|
|
/* Scale factor for generic timers, ie number of ns per tick.
|
|
* This gives a 62.5MHz timer.
|
|
*/
|
|
#define GTIMER_SCALE 16
|
|
|
|
/*
|
|
* For AArch64, map a given EL to an index in the banked_spsr array.
|
|
* Note that this mapping and the AArch32 mapping defined in bank_number()
|
|
* must agree such that the AArch64<->AArch32 SPSRs have the architecturally
|
|
* mandated mapping between each other.
|
|
*/
|
|
static inline unsigned int aarch64_banked_spsr_index(unsigned int el)
|
|
{
|
|
static const unsigned int map[4] = {
|
|
[1] = BANK_SVC, /* EL1. */
|
|
[2] = BANK_HYP, /* EL2. */
|
|
[3] = BANK_MON, /* EL3. */
|
|
};
|
|
assert(el >= 1 && el <= 3);
|
|
return map[el];
|
|
}
|
|
|
|
/* Map CPU modes onto saved register banks. */
|
|
static inline int bank_number(int mode)
|
|
{
|
|
switch (mode) {
|
|
case ARM_CPU_MODE_USR:
|
|
case ARM_CPU_MODE_SYS:
|
|
return BANK_USRSYS;
|
|
case ARM_CPU_MODE_SVC:
|
|
return BANK_SVC;
|
|
case ARM_CPU_MODE_ABT:
|
|
return BANK_ABT;
|
|
case ARM_CPU_MODE_UND:
|
|
return BANK_UND;
|
|
case ARM_CPU_MODE_IRQ:
|
|
return BANK_IRQ;
|
|
case ARM_CPU_MODE_FIQ:
|
|
return BANK_FIQ;
|
|
case ARM_CPU_MODE_HYP:
|
|
return BANK_HYP;
|
|
case ARM_CPU_MODE_MON:
|
|
return BANK_MON;
|
|
}
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
void switch_mode(CPUARMState *, int);
|
|
void arm_cpu_register_gdb_regs_for_features(ARMCPU *cpu);
|
|
void arm_translate_init(void);
|
|
|
|
enum arm_fprounding {
|
|
FPROUNDING_TIEEVEN,
|
|
FPROUNDING_POSINF,
|
|
FPROUNDING_NEGINF,
|
|
FPROUNDING_ZERO,
|
|
FPROUNDING_TIEAWAY,
|
|
FPROUNDING_ODD
|
|
};
|
|
|
|
int arm_rmode_to_sf(int rmode);
|
|
|
|
static inline void aarch64_save_sp(CPUARMState *env, int el)
|
|
{
|
|
if (env->pstate & PSTATE_SP) {
|
|
env->sp_el[el] = env->xregs[31];
|
|
} else {
|
|
env->sp_el[0] = env->xregs[31];
|
|
}
|
|
}
|
|
|
|
static inline void aarch64_restore_sp(CPUARMState *env, int el)
|
|
{
|
|
if (env->pstate & PSTATE_SP) {
|
|
env->xregs[31] = env->sp_el[el];
|
|
} else {
|
|
env->xregs[31] = env->sp_el[0];
|
|
}
|
|
}
|
|
|
|
static inline void update_spsel(CPUARMState *env, uint32_t imm)
|
|
{
|
|
unsigned int cur_el = arm_current_el(env);
|
|
/* Update PSTATE SPSel bit; this requires us to update the
|
|
* working stack pointer in xregs[31].
|
|
*/
|
|
if (!((imm ^ env->pstate) & PSTATE_SP)) {
|
|
return;
|
|
}
|
|
aarch64_save_sp(env, cur_el);
|
|
env->pstate = deposit32(env->pstate, 0, 1, imm);
|
|
|
|
/* We rely on illegal updates to SPsel from EL0 to get trapped
|
|
* at translation time.
|
|
*/
|
|
assert(cur_el >= 1 && cur_el <= 3);
|
|
aarch64_restore_sp(env, cur_el);
|
|
}
|
|
|
|
/*
|
|
* arm_pamax
|
|
* @cpu: ARMCPU
|
|
*
|
|
* Returns the implementation defined bit-width of physical addresses.
|
|
* The ARMv8 reference manuals refer to this as PAMax().
|
|
*/
|
|
static inline unsigned int arm_pamax(ARMCPU *cpu)
|
|
{
|
|
static const unsigned int pamax_map[] = {
|
|
[0] = 32,
|
|
[1] = 36,
|
|
[2] = 40,
|
|
[3] = 42,
|
|
[4] = 44,
|
|
[5] = 48,
|
|
};
|
|
unsigned int parange = extract32(cpu->id_aa64mmfr0, 0, 4);
|
|
|
|
/* id_aa64mmfr0 is a read-only register so values outside of the
|
|
* supported mappings can be considered an implementation error. */
|
|
assert(parange < ARRAY_SIZE(pamax_map));
|
|
return pamax_map[parange];
|
|
}
|
|
|
|
/* Return true if extended addresses are enabled.
|
|
* This is always the case if our translation regime is 64 bit,
|
|
* but depends on TTBCR.EAE for 32 bit.
|
|
*/
|
|
static inline bool extended_addresses_enabled(CPUARMState *env)
|
|
{
|
|
TCR *tcr = &env->cp15.tcr_el[arm_is_secure(env) ? 3 : 1];
|
|
return arm_el_is_aa64(env, 1) ||
|
|
(arm_feature(env, ARM_FEATURE_LPAE) && (tcr->raw_tcr & TTBCR_EAE));
|
|
}
|
|
|
|
/* Valid Syndrome Register EC field values */
|
|
enum arm_exception_class {
|
|
EC_UNCATEGORIZED = 0x00,
|
|
EC_WFX_TRAP = 0x01,
|
|
EC_CP15RTTRAP = 0x03,
|
|
EC_CP15RRTTRAP = 0x04,
|
|
EC_CP14RTTRAP = 0x05,
|
|
EC_CP14DTTRAP = 0x06,
|
|
EC_ADVSIMDFPACCESSTRAP = 0x07,
|
|
EC_FPIDTRAP = 0x08,
|
|
EC_CP14RRTTRAP = 0x0c,
|
|
EC_ILLEGALSTATE = 0x0e,
|
|
EC_AA32_SVC = 0x11,
|
|
EC_AA32_HVC = 0x12,
|
|
EC_AA32_SMC = 0x13,
|
|
EC_AA64_SVC = 0x15,
|
|
EC_AA64_HVC = 0x16,
|
|
EC_AA64_SMC = 0x17,
|
|
EC_SYSTEMREGISTERTRAP = 0x18,
|
|
EC_INSNABORT = 0x20,
|
|
EC_INSNABORT_SAME_EL = 0x21,
|
|
EC_PCALIGNMENT = 0x22,
|
|
EC_DATAABORT = 0x24,
|
|
EC_DATAABORT_SAME_EL = 0x25,
|
|
EC_SPALIGNMENT = 0x26,
|
|
EC_AA32_FPTRAP = 0x28,
|
|
EC_AA64_FPTRAP = 0x2c,
|
|
EC_SERROR = 0x2f,
|
|
EC_BREAKPOINT = 0x30,
|
|
EC_BREAKPOINT_SAME_EL = 0x31,
|
|
EC_SOFTWARESTEP = 0x32,
|
|
EC_SOFTWARESTEP_SAME_EL = 0x33,
|
|
EC_WATCHPOINT = 0x34,
|
|
EC_WATCHPOINT_SAME_EL = 0x35,
|
|
EC_AA32_BKPT = 0x38,
|
|
EC_VECTORCATCH = 0x3a,
|
|
EC_AA64_BKPT = 0x3c,
|
|
};
|
|
|
|
#define ARM_EL_EC_SHIFT 26
|
|
#define ARM_EL_IL_SHIFT 25
|
|
#define ARM_EL_ISV_SHIFT 24
|
|
#define ARM_EL_IL (1 << ARM_EL_IL_SHIFT)
|
|
#define ARM_EL_ISV (1 << ARM_EL_ISV_SHIFT)
|
|
|
|
/* Utility functions for constructing various kinds of syndrome value.
|
|
* Note that in general we follow the AArch64 syndrome values; in a
|
|
* few cases the value in HSR for exceptions taken to AArch32 Hyp
|
|
* mode differs slightly, so if we ever implemented Hyp mode then the
|
|
* syndrome value would need some massaging on exception entry.
|
|
* (One example of this is that AArch64 defaults to IL bit set for
|
|
* exceptions which don't specifically indicate information about the
|
|
* trapping instruction, whereas AArch32 defaults to IL bit clear.)
|
|
*/
|
|
static inline uint32_t syn_uncategorized(void)
|
|
{
|
|
return (EC_UNCATEGORIZED << ARM_EL_EC_SHIFT) | ARM_EL_IL;
|
|
}
|
|
|
|
static inline uint32_t syn_aa64_svc(uint32_t imm16)
|
|
{
|
|
return (EC_AA64_SVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
|
|
}
|
|
|
|
static inline uint32_t syn_aa64_hvc(uint32_t imm16)
|
|
{
|
|
return (EC_AA64_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
|
|
}
|
|
|
|
static inline uint32_t syn_aa64_smc(uint32_t imm16)
|
|
{
|
|
return (EC_AA64_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
|
|
}
|
|
|
|
static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_16bit)
|
|
{
|
|
return (EC_AA32_SVC << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
|
|
| (is_16bit ? 0 : ARM_EL_IL);
|
|
}
|
|
|
|
static inline uint32_t syn_aa32_hvc(uint32_t imm16)
|
|
{
|
|
return (EC_AA32_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
|
|
}
|
|
|
|
static inline uint32_t syn_aa32_smc(void)
|
|
{
|
|
return (EC_AA32_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL;
|
|
}
|
|
|
|
static inline uint32_t syn_aa64_bkpt(uint32_t imm16)
|
|
{
|
|
return (EC_AA64_BKPT << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
|
|
}
|
|
|
|
static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_16bit)
|
|
{
|
|
return (EC_AA32_BKPT << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
|
|
| (is_16bit ? 0 : ARM_EL_IL);
|
|
}
|
|
|
|
static inline uint32_t syn_aa64_sysregtrap(int op0, int op1, int op2,
|
|
int crn, int crm, int rt,
|
|
int isread)
|
|
{
|
|
return (EC_SYSTEMREGISTERTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL
|
|
| (op0 << 20) | (op2 << 17) | (op1 << 14) | (crn << 10) | (rt << 5)
|
|
| (crm << 1) | isread;
|
|
}
|
|
|
|
static inline uint32_t syn_cp14_rt_trap(int cv, int cond, int opc1, int opc2,
|
|
int crn, int crm, int rt, int isread,
|
|
bool is_16bit)
|
|
{
|
|
return (EC_CP14RTTRAP << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
|
|
| (crn << 10) | (rt << 5) | (crm << 1) | isread;
|
|
}
|
|
|
|
static inline uint32_t syn_cp15_rt_trap(int cv, int cond, int opc1, int opc2,
|
|
int crn, int crm, int rt, int isread,
|
|
bool is_16bit)
|
|
{
|
|
return (EC_CP15RTTRAP << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
|
|
| (crn << 10) | (rt << 5) | (crm << 1) | isread;
|
|
}
|
|
|
|
static inline uint32_t syn_cp14_rrt_trap(int cv, int cond, int opc1, int crm,
|
|
int rt, int rt2, int isread,
|
|
bool is_16bit)
|
|
{
|
|
return (EC_CP14RRTTRAP << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| (cv << 24) | (cond << 20) | (opc1 << 16)
|
|
| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
|
|
}
|
|
|
|
static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
|
|
int rt, int rt2, int isread,
|
|
bool is_16bit)
|
|
{
|
|
return (EC_CP15RRTTRAP << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| (cv << 24) | (cond << 20) | (opc1 << 16)
|
|
| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
|
|
}
|
|
|
|
static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_16bit)
|
|
{
|
|
return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| (cv << 24) | (cond << 20);
|
|
}
|
|
|
|
static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
|
|
{
|
|
return (EC_INSNABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| ARM_EL_IL | (ea << 9) | (s1ptw << 7) | fsc;
|
|
}
|
|
|
|
static inline uint32_t syn_data_abort_no_iss(int same_el,
|
|
int ea, int cm, int s1ptw,
|
|
int wnr, int fsc)
|
|
{
|
|
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| ARM_EL_IL
|
|
| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
|
|
}
|
|
|
|
static inline uint32_t syn_data_abort_with_iss(int same_el,
|
|
int sas, int sse, int srt,
|
|
int sf, int ar,
|
|
int ea, int cm, int s1ptw,
|
|
int wnr, int fsc,
|
|
bool is_16bit)
|
|
{
|
|
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| (is_16bit ? 0 : ARM_EL_IL)
|
|
| ARM_EL_ISV | (sas << 22) | (sse << 21) | (srt << 16)
|
|
| (sf << 15) | (ar << 14)
|
|
| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
|
|
}
|
|
|
|
static inline uint32_t syn_swstep(int same_el, int isv, int ex)
|
|
{
|
|
return (EC_SOFTWARESTEP << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| ARM_EL_IL | (isv << 24) | (ex << 6) | 0x22;
|
|
}
|
|
|
|
static inline uint32_t syn_watchpoint(int same_el, int cm, int wnr)
|
|
{
|
|
return (EC_WATCHPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| ARM_EL_IL | (cm << 8) | (wnr << 6) | 0x22;
|
|
}
|
|
|
|
static inline uint32_t syn_breakpoint(int same_el)
|
|
{
|
|
return (EC_BREAKPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
|
|
| ARM_EL_IL | 0x22;
|
|
}
|
|
|
|
static inline uint32_t syn_wfx(int cv, int cond, int ti)
|
|
{
|
|
return (EC_WFX_TRAP << ARM_EL_EC_SHIFT) |
|
|
(cv << 24) | (cond << 20) | ti;
|
|
}
|
|
|
|
/* Update a QEMU watchpoint based on the information the guest has set in the
|
|
* DBGWCR<n>_EL1 and DBGWVR<n>_EL1 registers.
|
|
*/
|
|
void hw_watchpoint_update(ARMCPU *cpu, int n);
|
|
/* Update the QEMU watchpoints for every guest watchpoint. This does a
|
|
* complete delete-and-reinstate of the QEMU watchpoint list and so is
|
|
* suitable for use after migration or on reset.
|
|
*/
|
|
void hw_watchpoint_update_all(ARMCPU *cpu);
|
|
/* Update a QEMU breakpoint based on the information the guest has set in the
|
|
* DBGBCR<n>_EL1 and DBGBVR<n>_EL1 registers.
|
|
*/
|
|
void hw_breakpoint_update(ARMCPU *cpu, int n);
|
|
/* Update the QEMU breakpoints for every guest breakpoint. This does a
|
|
* complete delete-and-reinstate of the QEMU breakpoint list and so is
|
|
* suitable for use after migration or on reset.
|
|
*/
|
|
void hw_breakpoint_update_all(ARMCPU *cpu);
|
|
|
|
/* Callback function for checking if a watchpoint should trigger. */
|
|
bool arm_debug_check_watchpoint(CPUState *cs, CPUWatchpoint *wp);
|
|
|
|
/* Callback function for when a watchpoint or breakpoint triggers. */
|
|
void arm_debug_excp_handler(CPUState *cs);
|
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
static inline bool arm_is_psci_call(ARMCPU *cpu, int excp_type)
|
|
{
|
|
return false;
|
|
}
|
|
#else
|
|
/* Return true if the r0/x0 value indicates that this SMC/HVC is a PSCI call. */
|
|
bool arm_is_psci_call(ARMCPU *cpu, int excp_type);
|
|
/* Actually handle a PSCI call */
|
|
void arm_handle_psci_call(ARMCPU *cpu);
|
|
#endif
|
|
|
|
/**
|
|
* ARMMMUFaultInfo: Information describing an ARM MMU Fault
|
|
* @s2addr: Address that caused a fault at stage 2
|
|
* @stage2: True if we faulted at stage 2
|
|
* @s1ptw: True if we faulted at stage 2 while doing a stage 1 page-table walk
|
|
*/
|
|
typedef struct ARMMMUFaultInfo ARMMMUFaultInfo;
|
|
struct ARMMMUFaultInfo {
|
|
target_ulong s2addr;
|
|
bool stage2;
|
|
bool s1ptw;
|
|
};
|
|
|
|
/* Do a page table walk and add page to TLB if possible */
|
|
bool arm_tlb_fill(CPUState *cpu, vaddr address, int rw, int mmu_idx,
|
|
uint32_t *fsr, ARMMMUFaultInfo *fi);
|
|
|
|
/* Return true if the stage 1 translation regime is using LPAE format page
|
|
* tables */
|
|
bool arm_s1_regime_using_lpae_format(CPUARMState *env, ARMMMUIdx mmu_idx);
|
|
|
|
/* Raise a data fault alignment exception for the specified virtual address */
|
|
void arm_cpu_do_unaligned_access(CPUState *cs, vaddr vaddr, int is_write,
|
|
int is_user, uintptr_t retaddr);
|
|
|
|
/* Call the EL change hook if one has been registered */
|
|
static inline void arm_call_el_change_hook(ARMCPU *cpu)
|
|
{
|
|
if (cpu->el_change_hook) {
|
|
cpu->el_change_hook(cpu, cpu->el_change_hook_opaque);
|
|
}
|
|
}
|
|
|
|
#endif
|