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28#include "qemu/osdep.h"
29#include "cpu.h"
30#include "hw/hw.h"
31#include "qemu/log.h"
32#include "qemu/timer.h"
33
34void check_interrupts(CPUXtensaState *env)
35{
36 CPUState *cs = CPU(xtensa_env_get_cpu(env));
37 int minlevel = xtensa_get_cintlevel(env);
38 uint32_t int_set_enabled = env->sregs[INTSET] & env->sregs[INTENABLE];
39 int level;
40
41 for (level = env->config->nlevel; level > minlevel; --level) {
42 if (env->config->level_mask[level] & int_set_enabled) {
43 env->pending_irq_level = level;
44 cpu_interrupt(cs, CPU_INTERRUPT_HARD);
45 qemu_log_mask(CPU_LOG_INT,
46 "%s level = %d, cintlevel = %d, "
47 "pc = %08x, a0 = %08x, ps = %08x, "
48 "intset = %08x, intenable = %08x, "
49 "ccount = %08x\n",
50 __func__, level, xtensa_get_cintlevel(env),
51 env->pc, env->regs[0], env->sregs[PS],
52 env->sregs[INTSET], env->sregs[INTENABLE],
53 env->sregs[CCOUNT]);
54 return;
55 }
56 }
57 env->pending_irq_level = 0;
58 cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
59}
60
61static void xtensa_set_irq(void *opaque, int irq, int active)
62{
63 CPUXtensaState *env = opaque;
64
65 if (irq >= env->config->ninterrupt) {
66 qemu_log("%s: bad IRQ %d\n", __func__, irq);
67 } else {
68 uint32_t irq_bit = 1 << irq;
69
70 if (active) {
71 atomic_or(&env->sregs[INTSET], irq_bit);
72 } else if (env->config->interrupt[irq].inttype == INTTYPE_LEVEL) {
73 atomic_and(&env->sregs[INTSET], ~irq_bit);
74 }
75
76 check_interrupts(env);
77 }
78}
79
80static void xtensa_ccompare_cb(void *opaque)
81{
82 XtensaCcompareTimer *ccompare = opaque;
83 CPUXtensaState *env = ccompare->env;
84 unsigned i = ccompare - env->ccompare;
85
86 qemu_set_irq(env->irq_inputs[env->config->timerint[i]], 1);
87}
88
89static void xtensa_set_runstall(void *opaque, int irq, int active)
90{
91 CPUXtensaState *env = opaque;
92 xtensa_runstall(env, active);
93}
94
95void xtensa_irq_init(CPUXtensaState *env)
96{
97 unsigned i;
98
99 env->irq_inputs = qemu_allocate_irqs(xtensa_set_irq, env,
100 env->config->ninterrupt);
101 if (xtensa_option_enabled(env->config, XTENSA_OPTION_TIMER_INTERRUPT)) {
102 env->time_base = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
103 env->ccount_base = env->sregs[CCOUNT];
104 for (i = 0; i < env->config->nccompare; ++i) {
105 env->ccompare[i].env = env;
106 env->ccompare[i].timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
107 xtensa_ccompare_cb, env->ccompare + i);
108 }
109 }
110 for (i = 0; i < env->config->nextint; ++i) {
111 unsigned irq = env->config->extint[i];
112
113 env->ext_irq_inputs[i] = env->irq_inputs[irq];
114 }
115 env->runstall_irq = qemu_allocate_irq(xtensa_set_runstall, env, 0);
116}
117
118qemu_irq *xtensa_get_extints(CPUXtensaState *env)
119{
120 return env->ext_irq_inputs;
121}
122
123qemu_irq xtensa_get_runstall(CPUXtensaState *env)
124{
125 return env->runstall_irq;
126}
127