diff options
Diffstat (limited to 'target/arm/helper.c')
| -rw-r--r-- | target/arm/helper.c | 92 |
1 files changed, 91 insertions, 1 deletions
diff --git a/target/arm/helper.c b/target/arm/helper.c index 8ef0fb478f..455c92b891 100644 --- a/target/arm/helper.c +++ b/target/arm/helper.c @@ -9581,6 +9581,66 @@ static void arm_cpu_do_interrupt_aarch32(CPUState *cs) take_aarch32_exception(env, new_mode, mask, offset, addr); } +static int aarch64_regnum(CPUARMState *env, int aarch32_reg) +{ + /* + * Return the register number of the AArch64 view of the AArch32 + * register @aarch32_reg. The CPUARMState CPSR is assumed to still + * be that of the AArch32 mode the exception came from. + */ + int mode = env->uncached_cpsr & CPSR_M; + + switch (aarch32_reg) { + case 0 ... 7: + return aarch32_reg; + case 8 ... 12: + return mode == ARM_CPU_MODE_FIQ ? aarch32_reg + 16 : aarch32_reg; + case 13: + switch (mode) { + case ARM_CPU_MODE_USR: + case ARM_CPU_MODE_SYS: + return 13; + case ARM_CPU_MODE_HYP: + return 15; + case ARM_CPU_MODE_IRQ: + return 17; + case ARM_CPU_MODE_SVC: + return 19; + case ARM_CPU_MODE_ABT: + return 21; + case ARM_CPU_MODE_UND: + return 23; + case ARM_CPU_MODE_FIQ: + return 29; + default: + g_assert_not_reached(); + } + case 14: + switch (mode) { + case ARM_CPU_MODE_USR: + case ARM_CPU_MODE_SYS: + case ARM_CPU_MODE_HYP: + return 14; + case ARM_CPU_MODE_IRQ: + return 16; + case ARM_CPU_MODE_SVC: + return 18; + case ARM_CPU_MODE_ABT: + return 20; + case ARM_CPU_MODE_UND: + return 22; + case ARM_CPU_MODE_FIQ: + return 30; + default: + g_assert_not_reached(); + } + case 15: + return 31; + default: + g_assert_not_reached(); + } +} + /* Handle exception entry to a target EL which is using AArch64 */ static void arm_cpu_do_interrupt_aarch64(CPUState *cs) { @@ -9591,6 +9651,7 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs) unsigned int new_mode = aarch64_pstate_mode(new_el, true); unsigned int old_mode; unsigned int cur_el = arm_current_el(env); + int rt; /* * Note that new_el can never be 0. If cur_el is 0, then @@ -9645,7 +9706,8 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs) case EXCP_HVC: case EXCP_HYP_TRAP: case EXCP_SMC: - if (syn_get_ec(env->exception.syndrome) == EC_ADVSIMDFPACCESSTRAP) { + switch (syn_get_ec(env->exception.syndrome)) { + case EC_ADVSIMDFPACCESSTRAP: /* * QEMU internal FP/SIMD syndromes from AArch32 include the * TA and coproc fields which are only exposed if the exception @@ -9653,6 +9715,34 @@ static void arm_cpu_do_interrupt_aarch64(CPUState *cs) * AArch64 format syndrome. */ env->exception.syndrome &= ~MAKE_64BIT_MASK(0, 20); + break; + case EC_CP14RTTRAP: + case EC_CP15RTTRAP: + case EC_CP14DTTRAP: + /* + * For a trap on AArch32 MRC/MCR/LDC/STC the Rt field is currently + * the raw register field from the insn; when taking this to + * AArch64 we must convert it to the AArch64 view of the register + * number. Notice that we read a 4-bit AArch32 register number and + * write back a 5-bit AArch64 one. + */ + rt = extract32(env->exception.syndrome, 5, 4); + rt = aarch64_regnum(env, rt); + env->exception.syndrome = deposit32(env->exception.syndrome, + 5, 5, rt); + break; + case EC_CP15RRTTRAP: + case EC_CP14RRTTRAP: + /* Similarly for MRRC/MCRR traps for Rt and Rt2 fields */ + rt = extract32(env->exception.syndrome, 5, 4); + rt = aarch64_regnum(env, rt); + env->exception.syndrome = deposit32(env->exception.syndrome, + 5, 5, rt); + rt = extract32(env->exception.syndrome, 10, 4); + rt = aarch64_regnum(env, rt); + env->exception.syndrome = deposit32(env->exception.syndrome, + 10, 5, rt); + break; } env->cp15.esr_el[new_el] = env->exception.syndrome; break; |