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| author | Edgar E. Iglesias | 2014-05-27 18:09:54 +0200 |
|---|---|---|
| committer | Peter Maydell | 2014-05-27 18:09:54 +0200 |
| commit | db6c3cd0e7fc58dacba89bf808e2892cd6a18b28 (patch) | |
| tree | e34d72a9b20e7d8dc59bdae8bfe7cd0111a6d0a0 /target-arm | |
| parent | target-arm: A64: Trap ERET from EL0 at translation time (diff) | |
| download | qemu-db6c3cd0e7fc58dacba89bf808e2892cd6a18b28.tar.gz qemu-db6c3cd0e7fc58dacba89bf808e2892cd6a18b28.tar.xz qemu-db6c3cd0e7fc58dacba89bf808e2892cd6a18b28.zip | |
target-arm: A64: Generalize ERET to various ELs
Adds support for ERET to and from AArch64 EL2 and 3.
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1400980132-25949-20-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-arm')
| -rw-r--r-- | target-arm/op_helper.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c index e95a7f401f..50a4157acd 100644 --- a/target-arm/op_helper.c +++ b/target-arm/op_helper.c @@ -386,13 +386,13 @@ void HELPER(msr_i_pstate)(CPUARMState *env, uint32_t op, uint32_t imm) void HELPER(exception_return)(CPUARMState *env) { - unsigned int spsr_idx = aarch64_banked_spsr_index(1); + int cur_el = arm_current_pl(env); + unsigned int spsr_idx = aarch64_banked_spsr_index(cur_el); uint32_t spsr = env->banked_spsr[spsr_idx]; int new_el, i; - int cur_el = arm_current_pl(env); if (env->pstate & PSTATE_SP) { - env->sp_el[1] = env->xregs[31]; + env->sp_el[cur_el] = env->xregs[31]; } else { env->sp_el[0] = env->xregs[31]; } @@ -400,6 +400,7 @@ void HELPER(exception_return)(CPUARMState *env) env->exclusive_addr = -1; if (spsr & PSTATE_nRW) { + /* TODO: We currently assume EL1/2/3 are running in AArch64. */ env->aarch64 = 0; new_el = 0; env->uncached_cpsr = 0x10; @@ -429,7 +430,7 @@ void HELPER(exception_return)(CPUARMState *env) env->aarch64 = 1; pstate_write(env, spsr); env->xregs[31] = env->sp_el[new_el]; - env->pc = env->elr_el[1]; + env->pc = env->elr_el[cur_el]; } return; @@ -443,7 +444,7 @@ illegal_return: * no change to exception level, execution state or stack pointer */ env->pstate |= PSTATE_IL; - env->pc = env->elr_el[1]; + env->pc = env->elr_el[cur_el]; spsr &= PSTATE_NZCV | PSTATE_DAIF; spsr |= pstate_read(env) & ~(PSTATE_NZCV | PSTATE_DAIF); pstate_write(env, spsr); |