Add bus model (or input pins) into PowerPC CPU flags.

Add PowerPC 970 bus and exceptions model.
Add code provision for PowerPC 970 instanciation.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2680 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 122 insertions, 0 deletions

diff --git a/hw/ppc.c b/hw/ppc.c
index b16f305..62e9e1b 100644
--- a/hw/ppc.c
+++ b/hw/ppc.c
@@ -161,6 +161,128 @@ void ppc6xx_irq_init (CPUState *env)
     env->irq_inputs = (void **)qemu_allocate_irqs(&ppc6xx_set_irq, env, 6);
 }
 
+/* PowerPC 970 internal IRQ controller */
+static void ppc970_set_irq (void *opaque, int pin, int level)
+{
+    CPUState *env = opaque;
+    int cur_level;
+
+#if defined(PPC_DEBUG_IRQ)
+    if (loglevel & CPU_LOG_INT) {
+        fprintf(logfile, "%s: env %p pin %d level %d\n", __func__,
+                env, pin, level);
+    }
+#endif
+    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 PPC970_INPUT_INT:
+            /* Level sensitive - active high */
+#if defined(PPC_DEBUG_IRQ)
+            if (loglevel & CPU_LOG_INT) {
+                fprintf(logfile, "%s: set the external IRQ state to %d\n",
+                        __func__, level);
+            }
+#endif
+            ppc_set_irq(env, PPC_INTERRUPT_EXT, level);
+            break;
+        case PPC970_INPUT_THINT:
+            /* Level sensitive - active high */
+#if defined(PPC_DEBUG_IRQ)
+            if (loglevel & CPU_LOG_INT) {
+                fprintf(logfile, "%s: set the SMI IRQ state to %d\n", __func__,
+                        level);
+            }
+#endif
+            ppc_set_irq(env, PPC_INTERRUPT_THERM, level);
+            break;
+        case PPC970_INPUT_MCP:
+            /* Negative edge sensitive */
+            /* XXX: TODO: actual reaction may depends on HID0 status
+             *            603/604/740/750: check HID0[EMCP]
+             */
+            if (cur_level == 1 && level == 0) {
+#if defined(PPC_DEBUG_IRQ)
+                if (loglevel & CPU_LOG_INT) {
+                    fprintf(logfile, "%s: raise machine check state\n",
+                            __func__);
+                }
+#endif
+                ppc_set_irq(env, PPC_INTERRUPT_MCK, 1);
+            }
+            break;
+        case PPC970_INPUT_CKSTP:
+            /* Level sensitive - active low */
+            /* XXX: TODO: relay the signal to CKSTP_OUT pin */
+            if (level) {
+#if defined(PPC_DEBUG_IRQ)
+                if (loglevel & CPU_LOG_INT) {
+                    fprintf(logfile, "%s: stop the CPU\n", __func__);
+                }
+#endif
+                env->halted = 1;
+            } else {
+#if defined(PPC_DEBUG_IRQ)
+                if (loglevel & CPU_LOG_INT) {
+                    fprintf(logfile, "%s: restart the CPU\n", __func__);
+                }
+#endif
+                env->halted = 0;
+            }
+            break;
+        case PPC970_INPUT_HRESET:
+            /* Level sensitive - active low */
+            if (level) {
+#if 0 // XXX: TOFIX
+#if defined(PPC_DEBUG_IRQ)
+                if (loglevel & CPU_LOG_INT) {
+                    fprintf(logfile, "%s: reset the CPU\n", __func__);
+                }
+#endif
+                cpu_reset(env);
+#endif
+            }
+            break;
+        case PPC970_INPUT_SRESET:
+#if defined(PPC_DEBUG_IRQ)
+            if (loglevel & CPU_LOG_INT) {
+                fprintf(logfile, "%s: set the RESET IRQ state to %d\n",
+                        __func__, level);
+            }
+#endif
+            ppc_set_irq(env, PPC_INTERRUPT_RESET, level);
+            break;
+        case PPC970_INPUT_TBEN:
+#if defined(PPC_DEBUG_IRQ)
+            if (loglevel & CPU_LOG_INT) {
+                fprintf(logfile, "%s: set the TBEN state to %d\n", __func__,
+                        level);
+            }
+#endif
+            /* XXX: TODO */
+            break;
+        default:
+            /* Unknown pin - do nothing */
+#if defined(PPC_DEBUG_IRQ)
+            if (loglevel & CPU_LOG_INT) {
+                fprintf(logfile, "%s: unknown IRQ pin %d\n", __func__, pin);
+            }
+#endif
+            return;
+        }
+        if (level)
+            env->irq_input_state |= 1 << pin;
+        else
+            env->irq_input_state &= ~(1 << pin);
+    }
+}
+
+void ppc970_irq_init (CPUState *env)
+{
+    env->irq_inputs = (void **)qemu_allocate_irqs(&ppc970_set_irq, env, 7);
+}
+
 /* PowerPC 405 internal IRQ controller */
 static void ppc405_set_irq (void *opaque, int pin, int level)
 {