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target-xtensa: implement interrupt option

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See ISA, 4.4.6 (interrupt option), 4.4.7 (high priority interrupt
option) and 4.4.8 (timer interrupt option) for details.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Max Filippov 2011-09-06 03:55:48 +04:00 • committed by Blue Swirl
parent 1ddeaa5d42
commit b994e91b00
6 changed files with 431 additions and 12 deletions
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46
target-xtensa/op_helper.c
View file

@ -338,3 +338,49 @@ void HELPER(dump_state)(void)
{
cpu_dump_state(env, stderr, fprintf, 0);
}
void HELPER(waiti)(uint32_t pc, uint32_t intlevel)
{
env->pc = pc;
env->sregs[PS] = (env->sregs[PS] & ~PS_INTLEVEL) |
(intlevel << PS_INTLEVEL_SHIFT);
check_interrupts(env);
if (env->pending_irq_level) {
cpu_loop_exit(env);
return;
}
if (xtensa_option_enabled(env->config, XTENSA_OPTION_TIMER_INTERRUPT)) {
int i;
uint32_t wake_ccount = env->sregs[CCOUNT] - 1;
for (i = 0; i < env->config->nccompare; ++i) {
if (env->sregs[CCOMPARE + i] - env->sregs[CCOUNT] <
wake_ccount - env->sregs[CCOUNT]) {
wake_ccount = env->sregs[CCOMPARE + i];
}
}
env->wake_ccount = wake_ccount;
qemu_mod_timer(env->ccompare_timer, qemu_get_clock_ns(vm_clock) +
muldiv64(wake_ccount - env->sregs[CCOUNT],
1000000, env->config->clock_freq_khz));
}
env->halt_clock = qemu_get_clock_ns(vm_clock);
env->halted = 1;
HELPER(exception)(EXCP_HLT);
}
void HELPER(timer_irq)(uint32_t id, uint32_t active)
{
xtensa_timer_irq(env, id, active);
}
void HELPER(advance_ccount)(uint32_t d)
{
xtensa_advance_ccount(env, d);
}
void HELPER(check_interrupts)(CPUState *env)
{
check_interrupts(env);
}