kvm/powerpc: Add irq support for E500 core

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6662 c046a42c-6fe2-441c-8c8c-71466251a162

2 files changed, 61 insertions, 0 deletions

diff --git a/hw/ppc.c b/hw/ppc.c
index 9a01c01..b534e39 100644
--- a/hw/ppc.c
+++ b/hw/ppc.c
@@ -314,6 +314,66 @@ void ppc40x_irq_init (CPUState *env)
                                                   env, PPC40x_INPUT_NB);
 }
 
+/* PowerPC E500 internal IRQ controller */
+static void ppce500_set_irq (void *opaque, int pin, int level)
+{
+    CPUState *env = opaque;
+    int cur_level;
+
+    LOG_IRQ("%s: env %p pin %d level %d\n", __func__,
+                env, pin, level);
+    cur_level = (env->irq_input_state >> pin) & 1;
+    /* Don't generate spurious events */
+    if ((cur_level == 1 && level == 0) || (cur_level == 0 && level != 0)) {
+        switch (pin) {
+        case PPCE500_INPUT_MCK:
+            if (level) {
+                LOG_IRQ("%s: reset the PowerPC system\n",
+                            __func__);
+                qemu_system_reset_request();
+            }
+            break;
+        case PPCE500_INPUT_RESET_CORE:
+            if (level) {
+                LOG_IRQ("%s: reset the PowerPC core\n", __func__);
+                ppc_set_irq(env, PPC_INTERRUPT_MCK, level);
+            }
+            break;
+        case PPCE500_INPUT_CINT:
+            /* Level sensitive - active high */
+            LOG_IRQ("%s: set the critical IRQ state to %d\n",
+                        __func__, level);
+            ppc_set_irq(env, PPC_INTERRUPT_CEXT, level);
+            break;
+        case PPCE500_INPUT_INT:
+            /* Level sensitive - active high */
+            LOG_IRQ("%s: set the core IRQ state to %d\n",
+                        __func__, level);
+            ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
+            break;
+        case PPCE500_INPUT_DEBUG:
+            /* Level sensitive - active high */
+            LOG_IRQ("%s: set the debug pin state to %d\n",
+                        __func__, level);
+            ppc_set_irq(env, PPC_INTERRUPT_DEBUG, level);
+            break;
+        default:
+            /* Unknown pin - do nothing */
+            LOG_IRQ("%s: unknown IRQ pin %d\n", __func__, pin);
+            return;
+        }
+        if (level)
+            env->irq_input_state |= 1 << pin;
+        else
+            env->irq_input_state &= ~(1 << pin);
+    }
+}
+
+void ppce500_irq_init (CPUState *env)
+{
+    env->irq_inputs = (void **)qemu_allocate_irqs(&ppce500_set_irq,
+                                        env, PPCE500_INPUT_NB);
+}
 /*****************************************************************************/
 /* PowerPC time base and decrementer emulation */
 struct ppc_tb_t {
diff --git a/hw/ppc.h b/hw/ppc.h
index 75eb11a..2ec4680 100644
--- a/hw/ppc.h
+++ b/hw/ppc.h
@@ -31,6 +31,7 @@ extern CPUReadMemoryFunc *PPC_io_read[];
 void PPC_debug_write (void *opaque, uint32_t addr, uint32_t val);
 
 void ppc40x_irq_init (CPUState *env);
+void ppce500_irq_init (CPUState *env);
 void ppc6xx_irq_init (CPUState *env);
 void ppc970_irq_init (CPUState *env);