diff --git a/hw/mips-bios.h b/hw/mips-bios.h
new file mode 100644
index 0000000..b4b88ac
--- /dev/null
+++ b/hw/mips-bios.h
@@ -0,0 +1,8 @@
+#include "cpu.h"
+
+#define BIOS_SIZE (4 * 1024 * 1024)
+#ifdef TARGET_WORDS_BIGENDIAN
+#define BIOS_FILENAME "mips_bios.bin"
+#else
+#define BIOS_FILENAME "mipsel_bios.bin"
+#endif
diff --git a/hw/mips_jazz.c b/hw/mips_jazz.c
index 292137f..49c0b46 100644
--- a/hw/mips_jazz.c
+++ b/hw/mips_jazz.c
@@ -32,12 +32,7 @@
 #include "boards.h"
 #include "net.h"
 #include "scsi.h"
-
-#ifdef TARGET_WORDS_BIGENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
+#include "mips-bios.h"
 
 enum jazz_model_e
 {
diff --git a/hw/mips_malta.c b/hw/mips_malta.c
index 747143d..564eaa6 100644
--- a/hw/mips_malta.c
+++ b/hw/mips_malta.c
@@ -37,15 +37,10 @@
 #include "audio/audio.h"
 #include "boards.h"
 #include "qemu-log.h"
+#include "mips-bios.h"
 
 //#define DEBUG_BOARD_INIT
 
-#ifdef TARGET_WORDS_BIGENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
-
 #ifdef TARGET_MIPS64
 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
 #else
diff --git a/hw/mips_mipssim.c b/hw/mips_mipssim.c
index 54656ad..b3f190e 100644
--- a/hw/mips_mipssim.c
+++ b/hw/mips_mipssim.c
@@ -31,12 +31,7 @@
 #include "net.h"
 #include "sysemu.h"
 #include "boards.h"
-
-#ifdef TARGET_WORDS_BIGENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
+#include "mips-bios.h"
 
 #ifdef TARGET_MIPS64
 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
diff --git a/hw/mips_r4k.c b/hw/mips_r4k.c
index aea82cc..9ad8de6 100644
--- a/hw/mips_r4k.c
+++ b/hw/mips_r4k.c
@@ -16,12 +16,7 @@
 #include "boards.h"
 #include "flash.h"
 #include "qemu-log.h"
-
-#ifdef TARGET_WORDS_BIGENDIAN
-#define BIOS_FILENAME "mips_bios.bin"
-#else
-#define BIOS_FILENAME "mipsel_bios.bin"
-#endif
+#include "mips-bios.h"
 
 #define PHYS_TO_VIRT(x) ((x) | ~(target_ulong)0x7fffffff)
 
diff --git a/hw/ppc405_boards.c b/hw/ppc405_boards.c
index bc5f1cf..0b4eb93 100644
--- a/hw/ppc405_boards.c
+++ b/hw/ppc405_boards.c
@@ -32,7 +32,6 @@
 #include "qemu-log.h"
 
 #define BIOS_FILENAME "ppc405_rom.bin"
-#undef BIOS_SIZE
 #define BIOS_SIZE (2048 * 1024)
 
 #define KERNEL_LOAD_ADDR 0x00000000
diff --git a/hw/ppc_mac.h b/hw/ppc_mac.h
index 74d19a1..dc39338 100644
--- a/hw/ppc_mac.h
+++ b/hw/ppc_mac.h
@@ -28,6 +28,7 @@
 /* SMP is not enabled, for now */
 #define MAX_CPUS 1
 
+#define BIOS_SIZE     (1024 * 1024)
 #define BIOS_FILENAME "ppc_rom.bin"
 #define VGABIOS_FILENAME "video.x"
 #define NVRAM_SIZE        0x2000
diff --git a/hw/ppc_prep.c b/hw/ppc_prep.c
index b98c6c2..a805c29 100644
--- a/hw/ppc_prep.c
+++ b/hw/ppc_prep.c
@@ -41,6 +41,7 @@
 
 #define MAX_IDE_BUS 2
 
+#define BIOS_SIZE (1024 * 1024)
 #define BIOS_FILENAME "ppc_rom.bin"
 #define KERNEL_LOAD_ADDR 0x01000000
 #define INITRD_LOAD_ADDR 0x01800000
diff --git a/sysemu.h b/sysemu.h
index 2ff6194..1e4be53 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -123,14 +123,6 @@
 extern unsigned int nb_prom_envs;
 #endif
 
-#if defined (TARGET_PPC)
-#define BIOS_SIZE (1024 * 1024)
-#elif defined (TARGET_SPARC64)
-#define BIOS_SIZE ((512 + 32) * 1024)
-#elif defined(TARGET_MIPS)
-#define BIOS_SIZE (4 * 1024 * 1024)
-#endif
-
 typedef enum {
     IF_IDE, IF_SCSI, IF_FLOPPY, IF_PFLASH, IF_MTD, IF_SD, IF_VIRTIO, IF_XEN,
     IF_COUNT