Quick fixes to get the ppc system model to boot a 603e based
kernel.

diff --git a/hw/m48t59.c b/hw/m48t59.c
index ce38f8b..d99054f 100644
--- a/hw/m48t59.c
+++ b/hw/m48t59.c
@@ -50,6 +50,7 @@
  */
 
 struct m48t59_t {
+    SysBusDevice busdev;
     /* Model parameters */
     uint32_t type; // 2 = m48t02, 8 = m48t08, 59 = m48t59
     /* Hardware parameters */
@@ -74,11 +75,6 @@ typedef struct M48t59ISAState {
     m48t59_t state;
 } M48t59ISAState;
 
-typedef struct M48t59SysBusState {
-    SysBusDevice busdev;
-    m48t59_t state;
-} M48t59SysBusState;
-
 /* Fake timer functions */
 
 /* Alarm management */
@@ -629,8 +625,7 @@ static void m48t59_reset_isa(DeviceState *d)
 
 static void m48t59_reset_sysbus(DeviceState *d)
 {
-    M48t59SysBusState *sys = container_of(d, M48t59SysBusState, busdev.qdev);
-    m48t59_t *NVRAM = &sys->state;
+    m48t59_t *NVRAM = container_of(d, m48t59_t, busdev.qdev);
 
     m48t59_reset_common(NVRAM);
 }
@@ -642,7 +637,7 @@ m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base,
 {
     DeviceState *dev;
     SysBusDevice *s;
-    M48t59SysBusState *d;
+    m48t59_t *d;
 
     dev = qdev_create(NULL, "m48t59");
     qdev_prop_set_uint32(dev, "type", type);
@@ -659,9 +654,9 @@ m48t59_t *m48t59_init (qemu_irq IRQ, target_phys_addr_t mem_base,
         sysbus_mmio_map(s, 0, mem_base);
     }
 
-    d = FROM_SYSBUS(M48t59SysBusState, s);
+    d = FROM_SYSBUS(m48t59_t, s);
 
-    return &d->state;
+    return d;
 }
 
 m48t59_t *m48t59_init_isa(uint32_t io_base, uint16_t size, int type)
@@ -711,8 +706,7 @@ static int m48t59_init_isa1(ISADevice *dev)
 
 static int m48t59_init1(SysBusDevice *dev)
 {
-    M48t59SysBusState *d = FROM_SYSBUS(M48t59SysBusState, dev);
-    m48t59_t *s = &d->state;
+    m48t59_t *s = FROM_SYSBUS(m48t59_t, dev);
     int mem_index;
 
     sysbus_init_irq(dev, &s->IRQ);
@@ -741,12 +735,12 @@ static ISADeviceInfo m48t59_isa_info = {
 static SysBusDeviceInfo m48t59_info = {
     .init = m48t59_init1,
     .qdev.name  = "m48t59",
-    .qdev.size = sizeof(M48t59SysBusState),
+    .qdev.size  = sizeof(m48t59_t),
     .qdev.reset = m48t59_reset_sysbus,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_UINT32("size",    M48t59SysBusState, state.size,    -1),
-        DEFINE_PROP_UINT32("type",    M48t59SysBusState, state.type,    -1),
-        DEFINE_PROP_HEX32( "io_base", M48t59SysBusState, state.io_base,  0),
+        DEFINE_PROP_UINT32("size",    m48t59_t, size,    -1),
+        DEFINE_PROP_UINT32("type",    m48t59_t, type,    -1),
+        DEFINE_PROP_HEX32( "io_base", m48t59_t, io_base,  0),
         DEFINE_PROP_END_OF_LIST(),
     }
 };
diff --git a/hw/ppc_prep.c b/hw/ppc_prep.c
index eb758f2..08db51b 100644
--- a/hw/ppc_prep.c
+++ b/hw/ppc_prep.c
@@ -73,7 +73,7 @@ qemu_log_mask(CPU_LOG_IOPORT, fmt, ## __VA_ARGS__)
 /* Constants for devices init */
 static const int ide_iobase[2] = { 0x1f0, 0x170 };
 static const int ide_iobase2[2] = { 0x3f6, 0x376 };
-static const int ide_irq[2] = { 13, 13 };
+static const int ide_irq[2] = { 13, 14 };
 
 #define NE2000_NB_MAX 6
 
@@ -620,9 +620,6 @@ static void ppc_prep_init (ram_addr_t ram_size,
     if (filename) {
         qemu_free(filename);
     }
-    if (env->nip < 0xFFF80000 && bios_size < 0x00100000) {
-        hw_error("PowerPC 601 / 620 / 970 need a 1MB BIOS\n");
-    }
 
     if (linux_boot) {
         kernel_base = KERNEL_LOAD_ADDR;
diff --git a/target-ppc/op_helper.c b/target-ppc/op_helper.c
index e3bd29c..1cb2e07 100644
--- a/target-ppc/op_helper.c
+++ b/target-ppc/op_helper.c
@@ -1646,20 +1646,20 @@ static inline void do_rfi(target_ulong nip, target_ulong msr,
 void helper_rfi (void)
 {
     do_rfi(env->spr[SPR_SRR0], env->spr[SPR_SRR1],
-           ~((target_ulong)0x0), 1);
+           ~((target_ulong)0xFFFF0000), 1);
 }
 
 #if defined(TARGET_PPC64)
 void helper_rfid (void)
 {
     do_rfi(env->spr[SPR_SRR0], env->spr[SPR_SRR1],
-           ~((target_ulong)0x0), 0);
+           ~((target_ulong)0xFFFF0000), 0);
 }
 
 void helper_hrfid (void)
 {
     do_rfi(env->spr[SPR_HSRR0], env->spr[SPR_HSRR1],
-           ~((target_ulong)0x0), 0);
+           ~((target_ulong)0xFFFF0000), 0);
 }
 #endif
 #endif
