qemu/pc-bios/bios.diff

Index: rombios.c
===================================================================
RCS file: /cvsroot/bochs/bochs/bios/rombios.c,v
retrieving revision 1.174
diff -u -w -r1.174 rombios.c
--- rombios.c	17 Oct 2006 16:48:05 -0000	1.174
+++ rombios.c	8 Feb 2007 21:57:48 -0000
@@ -9472,6 +9472,14 @@
   mov eax, #0x00040000
   call eax
 
+  ;; reset the memory (some boot loaders such as syslinux suppose 
+  ;; that the memory is set to zero)
+  mov edi, #0x00040000
+  mov ecx, #0x40000 / 4
+  xor eax, eax
+  rep 
+    stosd
+
   ;; return to 16 bit protected mode first
   db 0xea
   dd rombios32_10
Index: rombios.h
===================================================================
RCS file: /cvsroot/bochs/bochs/bios/rombios.h,v
retrieving revision 1.3
diff -u -w -r1.3 rombios.h
--- rombios.h	3 Oct 2006 20:27:30 -0000	1.3
+++ rombios.h	8 Feb 2007 21:57:48 -0000
@@ -19,7 +19,7 @@
 //  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
 
 /* define it to include QEMU specific code */
-//#define BX_QEMU
+#define BX_QEMU
 
 #ifndef LEGACY
 #  define BX_ROMBIOS32     1
Index: rombios32.c
===================================================================
RCS file: /cvsroot/bochs/bochs/bios/rombios32.c,v
retrieving revision 1.8
diff -u -w -r1.8 rombios32.c
--- rombios32.c	3 Oct 2006 20:27:30 -0000	1.8
+++ rombios32.c	8 Feb 2007 21:57:48 -0000
@@ -852,6 +852,11 @@
     int ioapic_id, i, len;
     int mp_config_table_size;
 
+#ifdef BX_QEMU
+    if (smp_cpus <= 1)
+        return;
+#endif
+
 #ifdef BX_USE_EBDA_TABLES
     mp_config_table = (uint8_t *)(ram_size - ACPI_DATA_SIZE - MPTABLE_MAX_SIZE);
 #else