ARM reabbot support (orginal patch by Aurelien Jarno).

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2476 c046a42c-6fe2-441c-8c8c-71466251a162

hw/arm_boot.c

@@ -24,6 +24,17 @@ static uint32_t bootloader[] = {
   0  /* Kernel entry point.  Set by integratorcp_init.  */
 };
 
+static void main_cpu_reset(void *opaque)
+{
+    CPUState *env = opaque;
+
+    cpu_reset(env);
+    if (env->kernel_filename)
+        arm_load_kernel(env, env->ram_size, env->kernel_filename, 
+                        env->kernel_cmdline, env->initrd_filename, 
+                        env->board_id);
+}
+
 static void set_kernel_args(uint32_t ram_size, int initrd_size,
                             const char *kernel_cmdline)
 {
@@ -81,6 +92,14 @@ void arm_load_kernel(CPUState *env, int ram_size, const char *kernel_filename,
         exit(1);
     }
 
+    if (!env->kernel_filename) {
+        env->ram_size = ram_size;
+        env->kernel_filename = kernel_filename;
+        env->kernel_cmdline = kernel_cmdline;
+        env->initrd_filename = initrd_filename;
+        env->board_id = board_id;
+        qemu_register_reset(main_cpu_reset, env);
+    }
     /* Assume that raw images are linux kernels, and ELF images are not.  */
     kernel_size = load_elf(kernel_filename, 0, &elf_entry);
     entry = elf_entry;

hw/arm_sysctl.c

@@ -149,7 +149,7 @@ static void arm_sysctl_write(void *opaque, target_phys_addr_t offset,
         if (s->lockval == LOCK_VALUE) {
             s->resetlevel = val;
             if (val & 0x100)
-                cpu_abort(cpu_single_env, "Board reset\n");
+                qemu_system_reset_request ();
         }
         break;
     case 0x44: /* PCICTL */

target-arm/cpu.h

@@ -122,6 +122,12 @@ typedef struct CPUARMState {
 
     CPU_COMMON
 
+    /* These fields after the common ones so thes are preserved on reset.  */
+    int ram_size;
+    const char *kernel_filename;
+    const char *kernel_cmdline;
+    const char *initrd_filename;
+    int board_id;
 } CPUARMState;
 
 CPUARMState *cpu_arm_init(void);

target-arm/helper.c

@@ -5,8 +5,37 @@
 #include "cpu.h"
 #include "exec-all.h"
 
+static inline void set_feature(CPUARMState *env, int feature)
+{
+    env->features |= 1u << feature;
+}
+
+static void cpu_reset_model_id(CPUARMState *env, uint32_t id)
+{
+    env->cp15.c0_cpuid = id;
+    switch (id) {
+    case ARM_CPUID_ARM926:
+        set_feature(env, ARM_FEATURE_VFP);
+        env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
+        break;
+    case ARM_CPUID_ARM1026:
+        set_feature(env, ARM_FEATURE_VFP);
+        set_feature(env, ARM_FEATURE_AUXCR);
+        env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
+        break;
+    default:
+        cpu_abort(env, "Bad CPU ID: %x\n", id);
+        break;
+    }
+}
+
 void cpu_reset(CPUARMState *env)
 {
+    uint32_t id;
+    id = env->cp15.c0_cpuid;
+    memset(env, 0, offsetof(CPUARMState, breakpoints));
+    if (id)
+        cpu_reset_model_id(env, id);
 #if defined (CONFIG_USER_ONLY)
     env->uncached_cpsr = ARM_CPU_MODE_USR;
     env->vfp.xregs[ARM_VFP_FPEXC] = 1 << 30;
@@ -16,6 +45,7 @@ void cpu_reset(CPUARMState *env)
     env->vfp.xregs[ARM_VFP_FPEXC] = 0;
 #endif
     env->regs[15] = 0;
+    tlb_flush(env, 1);
 }
 
 CPUARMState *cpu_arm_init(void)
@@ -27,15 +57,9 @@ CPUARMState *cpu_arm_init(void)
         return NULL;
     cpu_exec_init(env);
     cpu_reset(env);
-    tlb_flush(env, 1);
     return env;
 }
 
-static inline void set_feature(CPUARMState *env, int feature)
-{
-    env->features |= 1u << feature;
-}
-
 struct arm_cpu_t {
     uint32_t id;
     const char *name;
@@ -74,22 +98,7 @@ void cpu_arm_set_model(CPUARMState *env, const char *name)
         cpu_abort(env, "Unknown CPU '%s'", name);
         return;
     }
-
+    cpu_reset_model_id(env, id);
-    env->cp15.c0_cpuid = id;
-    switch (id) {
-    case ARM_CPUID_ARM926:
-        set_feature(env, ARM_FEATURE_VFP);
-        env->vfp.xregs[ARM_VFP_FPSID] = 0x41011090;
-        break;
-    case ARM_CPUID_ARM1026:
-        set_feature(env, ARM_FEATURE_VFP);
-        set_feature(env, ARM_FEATURE_AUXCR);
-        env->vfp.xregs[ARM_VFP_FPSID] = 0x410110a0;
-        break;
-    default:
-        cpu_abort(env, "Bad CPU ID: %x\n", id);
-        break;
-    }
 }
 
 void cpu_arm_close(CPUARMState *env)