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--- linux-2.6.9/arch/i386/Kconfig 2004-10-18 23:53:22.000000000 +0200
+++ linux-2.6.9-qemu/arch/i386/Kconfig 2004-12-07 21:56:49.000000000 +0100
@@ -337,6 +337,14 @@ config X86_GENERIC
endif
+config QEMU
+ bool "Kernel to run under QEMU"
+ depends on EXPERIMENTAL
+ help
+ Select this if you want to boot the kernel inside qemu-fast,
+ the non-mmu version of the x86 emulator. See
+ <http://fabrice.bellard.free.fr/qemu/>. Say N.
+
#
# Define implied options from the CPU selection here
#
--- linux-2.6.9/include/asm-i386/fixmap.h 2004-10-18 23:53:08.000000000 +0200
+++ linux-2.6.9-qemu/include/asm-i386/fixmap.h 2004-12-07 23:16:11.000000000 +0100
@@ -20,7 +20,11 @@
* Leave one empty page between vmalloc'ed areas and
* the start of the fixmap.
*/
+#ifdef CONFIG_QEMU
+#define __FIXADDR_TOP 0xa7fff000
+#else
#define __FIXADDR_TOP 0xfffff000
+#endif
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
--- linux-2.6.9/include/asm-i386/page.h 2004-10-18 23:53:22.000000000 +0200
+++ linux-2.6.9-qemu/include/asm-i386/page.h 2004-12-07 21:56:49.000000000 +0100
@@ -121,12 +121,19 @@ extern int sysctl_legacy_va_layout;
#endif /* __ASSEMBLY__ */
#ifdef __ASSEMBLY__
+#ifdef CONFIG_QEMU
+#define __PAGE_OFFSET (0x90000000)
+#else
#define __PAGE_OFFSET (0xC0000000)
+#endif /* QEMU */
+#else
+#ifdef CONFIG_QEMU
+#define __PAGE_OFFSET (0x90000000UL)
#else
#define __PAGE_OFFSET (0xC0000000UL)
+#endif /* QEMU */
#endif
-
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
#define VMALLOC_RESERVE ((unsigned long)__VMALLOC_RESERVE)
#define MAXMEM (-__PAGE_OFFSET-__VMALLOC_RESERVE)
--- linux-2.6.9/include/asm-i386/param.h 2004-10-18 23:53:24.000000000 +0200
+++ linux-2.6.9-qemu/include/asm-i386/param.h 2004-12-07 21:56:49.000000000 +0100
@@ -2,7 +2,12 @@
#define _ASMi386_PARAM_H
#ifdef __KERNEL__
-# define HZ 1000 /* Internal kernel timer frequency */
+# include <linux/config.h>
+# ifdef CONFIG_QEMU
+# define HZ 100
+# else
+# define HZ 1000 /* Internal kernel timer frequency */
+# endif
# define USER_HZ 100 /* .. some user interfaces are in "ticks" */
# define CLOCKS_PER_SEC (USER_HZ) /* like times() */
#endif
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