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authorKristian Høgsberg <krh@redhat.com>2008-05-29 18:31:14 -0400
committerH. Peter Anvin <hpa@zytor.com>2008-05-30 17:00:34 -0700
commit23968f71b26ece45ed52895d41b0208b90a516e7 (patch)
tree542d30c736329e335fab8e22b0c140685a3e9e91 /arch/x86/boot/compressed/misc.c
parentc7d624d1ee7b77622305bd638755394e4d3f2d2f (diff)
x86: Use structs instead of hardcoded offsets in x86 boot decompressor.
Replace hardcoded offsets embedded in macros in arch/x86/boot/compressed with proper structure references. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Diffstat (limited to 'arch/x86/boot/compressed/misc.c')
-rw-r--r--arch/x86/boot/compressed/misc.c26
1 files changed, 11 insertions, 15 deletions
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 90456cee47c3..74ed3c075ee6 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -30,6 +30,7 @@
#include <asm/io.h>
#include <asm/page.h>
#include <asm/boot.h>
+#include <asm/bootparam.h>
/* WARNING!!
* This code is compiled with -fPIC and it is relocated dynamically
@@ -187,13 +188,7 @@ static void gzip_release(void **);
/*
* This is set up by the setup-routine at boot-time
*/
-static unsigned char *real_mode; /* Pointer to real-mode data */
-
-#define RM_EXT_MEM_K (*(unsigned short *)(real_mode + 0x2))
-#ifndef STANDARD_MEMORY_BIOS_CALL
-#define RM_ALT_MEM_K (*(unsigned long *)(real_mode + 0x1e0))
-#endif
-#define RM_SCREEN_INFO (*(struct screen_info *)(real_mode+0))
+static struct boot_params *real_mode; /* Pointer to real-mode data */
extern unsigned char input_data[];
extern int input_len;
@@ -276,12 +271,13 @@ static void putstr(const char *s)
char c;
#ifdef CONFIG_X86_32
- if (RM_SCREEN_INFO.orig_video_mode == 0 && lines == 0 && cols == 0)
+ if (real_mode->screen_info.orig_video_mode == 0 &&
+ lines == 0 && cols == 0)
return;
#endif
- x = RM_SCREEN_INFO.orig_x;
- y = RM_SCREEN_INFO.orig_y;
+ x = real_mode->screen_info.orig_x;
+ y = real_mode->screen_info.orig_y;
while ((c = *s++) != '\0') {
if (c == '\n') {
@@ -302,8 +298,8 @@ static void putstr(const char *s)
}
}
- RM_SCREEN_INFO.orig_x = x;
- RM_SCREEN_INFO.orig_y = y;
+ real_mode->screen_info.orig_x = x;
+ real_mode->screen_info.orig_y = y;
pos = (x + cols * y) * 2; /* Update cursor position */
outb(14, vidport);
@@ -430,7 +426,7 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
{
real_mode = rmode;
- if (RM_SCREEN_INFO.orig_video_mode == 7) {
+ if (real_mode->screen_info.orig_video_mode == 7) {
vidmem = (char *) 0xb0000;
vidport = 0x3b4;
} else {
@@ -438,8 +434,8 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
vidport = 0x3d4;
}
- lines = RM_SCREEN_INFO.orig_video_lines;
- cols = RM_SCREEN_INFO.orig_video_cols;
+ lines = real_mode->screen_info.orig_video_lines;
+ cols = real_mode->screen_info.orig_video_cols;
window = output; /* Output buffer (Normally at 1M) */
free_mem_ptr = heap; /* Heap */