126 lines
4.5 KiB
C
126 lines
4.5 KiB
C
/*
|
|
* Copyright (c) 2011, Max Filippov, Open Source and Linux Lab.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* * Neither the name of the Open Source and Linux Lab nor the
|
|
* names of its contributors may be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
|
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "cpu.h"
|
|
#include "hw/irq.h"
|
|
#include "qemu/log.h"
|
|
#include "qemu/timer.h"
|
|
|
|
void check_interrupts(CPUXtensaState *env)
|
|
{
|
|
CPUState *cs = env_cpu(env);
|
|
int minlevel = xtensa_get_cintlevel(env);
|
|
uint32_t int_set_enabled = env->sregs[INTSET] & env->sregs[INTENABLE];
|
|
int level;
|
|
|
|
for (level = env->config->nlevel; level > minlevel; --level) {
|
|
if (env->config->level_mask[level] & int_set_enabled) {
|
|
env->pending_irq_level = level;
|
|
cpu_interrupt(cs, CPU_INTERRUPT_HARD);
|
|
qemu_log_mask(CPU_LOG_INT,
|
|
"%s level = %d, cintlevel = %d, "
|
|
"pc = %08x, a0 = %08x, ps = %08x, "
|
|
"intset = %08x, intenable = %08x, "
|
|
"ccount = %08x\n",
|
|
__func__, level, xtensa_get_cintlevel(env),
|
|
env->pc, env->regs[0], env->sregs[PS],
|
|
env->sregs[INTSET], env->sregs[INTENABLE],
|
|
env->sregs[CCOUNT]);
|
|
return;
|
|
}
|
|
}
|
|
env->pending_irq_level = 0;
|
|
cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
|
|
}
|
|
|
|
static void xtensa_set_irq(void *opaque, int irq, int active)
|
|
{
|
|
CPUXtensaState *env = opaque;
|
|
|
|
if (irq >= env->config->ninterrupt) {
|
|
qemu_log("%s: bad IRQ %d\n", __func__, irq);
|
|
} else {
|
|
uint32_t irq_bit = 1 << irq;
|
|
|
|
if (active) {
|
|
atomic_or(&env->sregs[INTSET], irq_bit);
|
|
} else if (env->config->interrupt[irq].inttype == INTTYPE_LEVEL) {
|
|
atomic_and(&env->sregs[INTSET], ~irq_bit);
|
|
}
|
|
|
|
check_interrupts(env);
|
|
}
|
|
}
|
|
|
|
static void xtensa_ccompare_cb(void *opaque)
|
|
{
|
|
XtensaCcompareTimer *ccompare = opaque;
|
|
CPUXtensaState *env = ccompare->env;
|
|
unsigned i = ccompare - env->ccompare;
|
|
|
|
qemu_set_irq(env->irq_inputs[env->config->timerint[i]], 1);
|
|
}
|
|
|
|
static void xtensa_set_runstall(void *opaque, int irq, int active)
|
|
{
|
|
CPUXtensaState *env = opaque;
|
|
xtensa_runstall(env, active);
|
|
}
|
|
|
|
void xtensa_irq_init(CPUXtensaState *env)
|
|
{
|
|
unsigned i;
|
|
|
|
env->irq_inputs = qemu_allocate_irqs(xtensa_set_irq, env,
|
|
env->config->ninterrupt);
|
|
if (xtensa_option_enabled(env->config, XTENSA_OPTION_TIMER_INTERRUPT)) {
|
|
env->time_base = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
|
|
env->ccount_base = env->sregs[CCOUNT];
|
|
for (i = 0; i < env->config->nccompare; ++i) {
|
|
env->ccompare[i].env = env;
|
|
env->ccompare[i].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
|
|
xtensa_ccompare_cb, env->ccompare + i);
|
|
}
|
|
}
|
|
for (i = 0; i < env->config->nextint; ++i) {
|
|
unsigned irq = env->config->extint[i];
|
|
|
|
env->ext_irq_inputs[i] = env->irq_inputs[irq];
|
|
}
|
|
env->runstall_irq = qemu_allocate_irq(xtensa_set_runstall, env, 0);
|
|
}
|
|
|
|
qemu_irq *xtensa_get_extints(CPUXtensaState *env)
|
|
{
|
|
return env->ext_irq_inputs;
|
|
}
|
|
|
|
qemu_irq xtensa_get_runstall(CPUXtensaState *env)
|
|
{
|
|
return env->runstall_irq;
|
|
}
|