target/xtensa: expose core runstall as an IRQ line

Runstall signal looks very much like a level-triggered IRQ line. Provide
xtensa_get_runstall function that returns runstall IRQ.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

2 files changed, 14 insertions, 0 deletions

diff --git a/hw/xtensa/pic_cpu.c b/hw/xtensa/pic_cpu.c
index 077f4ad..a8939f5 100644
--- a/hw/xtensa/pic_cpu.c
+++ b/hw/xtensa/pic_cpu.c
@@ -86,6 +86,12 @@ static void xtensa_ccompare_cb(void *opaque)
     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;
@@ -106,9 +112,15 @@ void xtensa_irq_init(CPUXtensaState *env)
 
         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;
+}
diff --git a/target/xtensa/cpu.h b/target/xtensa/cpu.h
index 176af8a..b665bfc 100644
--- a/target/xtensa/cpu.h
+++ b/target/xtensa/cpu.h
@@ -485,6 +485,7 @@ typedef struct CPUXtensaState {
     int pending_irq_level; /* level of last raised IRQ */
     qemu_irq *irq_inputs;
     qemu_irq ext_irq_inputs[MAX_NINTERRUPT];
+    qemu_irq runstall_irq;
     XtensaCcompareTimer ccompare[MAX_NCCOMPARE];
     uint64_t time_base;
     uint64_t ccount_time;
@@ -571,6 +572,7 @@ void xtensa_sim_open_console(Chardev *chr);
 void check_interrupts(CPUXtensaState *s);
 void xtensa_irq_init(CPUXtensaState *env);
 qemu_irq *xtensa_get_extints(CPUXtensaState *env);
+qemu_irq xtensa_get_runstall(CPUXtensaState *env);
 int cpu_xtensa_signal_handler(int host_signum, void *pinfo, void *puc);
 void xtensa_cpu_list(FILE *f, fprintf_function cpu_fprintf);
 void xtensa_sync_window_from_phys(CPUXtensaState *env);