Option ROM init x86/x86emu update

- use default display in int 15 5f35
- move REALMODE_BASE to 0x600, 0x500 can be BDA
- add regparm for assembler functions
- use memset instead of own implementation
- YABEL: copy back the IVT, BDA and VBIOS. Some Xorg drivers require this.
- YABEL: use hardware timer instead of emulated timer, because the emulated
  timer's base is never initialized (leading to division by zero if the 
  timer is really used)

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4852 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

util/x86emu/yabel/compat/functions.c

@@ -17,6 +17,7 @@
 #ifndef CONFIG_COREBOOT_V2
 #include <config.h>
 #endif
+#include <string.h>
 #include <device/device.h>
 
 #define VMEM_SIZE 1024 *1024 /* 1 MB */
@@ -33,6 +34,9 @@ u32 biosemu(u8 *biosmem, u32 biosmem_size, struct device *dev,
 void run_bios(struct device * dev, unsigned long addr)
 {
 	biosemu(vmem, VMEM_SIZE, dev, addr);
+	memcpy(0x0, vmem + 0x0, 0x400);
+	memcpy(0x400, vmem + 0x400, 0x100);
+	memcpy(0xc0000, vmem + 0xc0000, 0x10000);
 }
 
 u64 get_time(void)