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target-arm: A64: Emulate the SMC insn

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Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 1411718914-6608-10-git-send-email-edgar.iglesias@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Edgar E. Iglesias 2014-09-29 18:48:50 +01:00 • committed by Peter Maydell
parent 607d98b81e
commit e0d6e6a5e7
7 changed files with 51 additions and 0 deletions
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26
target-arm/op_helper.c
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@ -416,6 +416,32 @@ void HELPER(pre_hvc)(CPUARMState *env)
}
}
void HELPER(pre_smc)(CPUARMState *env, uint32_t syndrome)
{
int cur_el = arm_current_pl(env);
/* FIXME: Use real secure state. */
bool secure = false;
bool smd = env->cp15.scr_el3 & SCR_SMD;
/* On ARMv8 AArch32, SMD only applies to NS state.
* On ARMv7 SMD only applies to NS state and only if EL2 is available.
* For ARMv7 non EL2, we force SMD to zero so we don't need to re-check
* the EL2 condition here.
*/
bool undef = is_a64(env) ? smd : (!secure && smd);
/* In NS EL1, HCR controlled routing to EL2 has priority over SMD. */
if (!secure && cur_el == 1 && (env->cp15.hcr_el2 & HCR_TSC)) {
env->exception.syndrome = syndrome;
raise_exception(env, EXCP_HYP_TRAP);
}
/* We've already checked that EL3 exists at translation time. */
if (undef) {
env->exception.syndrome = syn_uncategorized();
raise_exception(env, EXCP_UDEF);
}
}
void HELPER(exception_return)(CPUARMState *env)
{
int cur_el = arm_current_pl(env);