ARM Versatile Platform Baseboard emulation.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1804 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 73 insertions, 0 deletions

diff --git a/hw/arm_pic.c b/hw/arm_pic.c
new file mode 100644
index 0000000000..fbc2d67d0a
--- /dev/null
+++ b/hw/arm_pic.c
@@ -0,0 +1,73 @@
+/* 
+ * Generic ARM Programmable Interrupt Controller support.
+ *
+ * Copyright (c) 2006 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licenced under the LGPL
+ */
+
+#include "vl.h"
+#include "arm_pic.h"
+
+/* Stub functions for hardware that doesn't exist.  */
+void pic_set_irq(int irq, int level)
+{
+    cpu_abort(cpu_single_env, "pic_set_irq");
+}
+
+void pic_info(void)
+{
+}
+
+void irq_info(void)
+{
+}
+
+
+void pic_set_irq_new(void *opaque, int irq, int level)
+{
+    arm_pic_handler *p = (arm_pic_handler *)opaque;
+    /* Call the real handler.  */
+    (*p)(opaque, irq, level);
+}
+
+/* Model the IRQ/FIQ CPU interrupt lines as a two input interrupt controller.
+   Input 0 is IRQ and input 1 is FIQ.  */
+typedef struct
+{
+    arm_pic_handler handler;
+    CPUState *cpu_env;
+} arm_pic_cpu_state;
+
+static void arm_pic_cpu_handler(void *opaque, int irq, int level)
+{
+    arm_pic_cpu_state *s = (arm_pic_cpu_state *)opaque;
+    switch (irq) {
+    case ARM_PIC_CPU_IRQ:
+        if (level)
+            cpu_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
+        else
+            cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_HARD);
+        break;
+    case ARM_PIC_CPU_FIQ:
+        if (level)
+            cpu_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);
+        else
+            cpu_reset_interrupt(s->cpu_env, CPU_INTERRUPT_FIQ);
+        break;
+    default:
+        cpu_abort(s->cpu_env, "arm_pic_cpu_handler: Bad interrput line %d\n",
+                  irq);
+    }
+}
+
+void *arm_pic_init_cpu(CPUState *env)
+{
+    arm_pic_cpu_state *s;
+    
+    s = (arm_pic_cpu_state *)malloc(sizeof(arm_pic_cpu_state));
+    s->handler = arm_pic_cpu_handler;
+    s->cpu_env = env;
+    return s;
+}