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2002-07-12 Yoshinori K. Okuji <okuji@enbug.org>

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* stage2/boot.c (load_image): Rewrite the Linux booting support
	radically. Now it should work even on a machine having, say,
	only 128KB, theoretically. Of course, GRUB itself doesn't work
	on such a system, though.
	(load_initrd): Initialize LH based on CUR_ADDR, because the
	location becomes dynamic.
	* stage2/shared.h (LINUX_MAX_SETUP_SECTS): Set to 64.
	(LINUX_HEAP_END_OFFSET): Set to (0x9000 - 0x200).
	(LINUX_STAGING_AREA): Removed.
	(LINUX_SETUP): Likewise.
	(LINUX_KERNEL): Likewise.
	(LINUX_KERNEL_MAXLEN): Likewise.
	(LINUX_SETUP_SEG): Likewise.
	(LINUX_INIT_SEG): Likewise.
	(LINUX_SETUP_STACK): Set to 0x9000.
	(LINUX_BZIMAGE_ADDR): New macro.
	(LINUX_ZIMAGE_ADDR): Likewise.
	(LINUX_OLD_REAL_MODE_ADDR): Likewise.
	(CL_MY_LOCATION): Removed.
	(CL_MY_END_ADDR): Likewise.
	(CL_BASE_ADDR): Likewise.
	(CL_MAGIC): Renamed to ...
	(LINUX_CL_MAGIC): ... this.
	(LINUX_CL_OFFSET): New macro.
	(LINUX_CL_END_OFFSET): Likewise.
	(LINUX_SETUP_MOVE_SIZE): Likewise.
	(struct linux_kernel_header): Change the type of the member
	"cmd_line_ptr" to char *.
	(linux_data_tmp_addr): Declared.
	(linux_data_real_addr): Likewise.
	* stage2/asm.S [!STAGE1_5] (linux_data_tmp_addr): New variable.
	[!STAGE1_5] (linux_data_real_addr): Likewise.
	[!STAGE1_5] (big_linux_boot): Copy the real mode part from
	LINUX_DATA_TMP_ADDR to LINUX_DATA_REAL_ADDR.
	* grub/asmstub.c (linux_data_tmp_addr): New variable.
	(linux_data_real_addr): Likewise.
This commit is contained in:
okuji committed 2002-07-12 09:55:55 +00:00
1 parent f8b4503f1b
commit 51955d52d8
6 files changed
+158 -88
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stage2/shared.h
+18 -19
View File
@@ -138,29 +138,26 @@ extern char *grub_scratch_mem;
#define LINUX_DEFAULT_SETUP_SECTS 4
#define LINUX_FLAG_CAN_USE_HEAP 0x80
#define LINUX_INITRD_MAX_ADDRESS 0x38000000
#define LINUX_MAX_SETUP_SECTS 63
#define LINUX_MAX_SETUP_SECTS 64
#define LINUX_BOOT_LOADER_TYPE 0x71
#define LINUX_HEAP_END_OFFSET (0x7F00 - 0x200)
#define LINUX_HEAP_END_OFFSET (0x9000 - 0x200)
#define LINUX_STAGING_AREA RAW_ADDR (0x100000)
#define LINUX_SETUP RAW_ADDR (0x90000)
#define LINUX_KERNEL RAW_ADDR (0x10000)
#define LINUX_KERNEL_MAXLEN 0x7F000
#define LINUX_SETUP_SEG 0x9020
#define LINUX_INIT_SEG 0x9000
#define LINUX_SETUP_STACK 0x7F00
#define LINUX_BZIMAGE_ADDR RAW_ADDR (0x100000)
#define LINUX_ZIMAGE_ADDR RAW_ADDR (0x10000)
#define LINUX_OLD_REAL_MODE_ADDR RAW_ADDR (0x90000)
#define LINUX_SETUP_STACK 0x9000
#define LINUX_FLAG_BIG_KERNEL 0x1
#define LINUX_FLAG_BIG_KERNEL 0x1
/* Linux's video mode selection support. Actually I hate it! */
#define LINUX_VID_MODE_NORMAL 0xFFFF
#define LINUX_VID_MODE_EXTENDED 0xFFFE
#define LINUX_VID_MODE_ASK 0xFFFD
#define LINUX_VID_MODE_NORMAL 0xFFFF
#define LINUX_VID_MODE_EXTENDED 0xFFFE
#define LINUX_VID_MODE_ASK 0xFFFD
#define CL_MY_LOCATION RAW_ADDR (0x97F00)
#define CL_MY_END_ADDR RAW_ADDR (0x97FFF)
#define CL_MAGIC 0xA33F
#define CL_BASE_ADDR RAW_ADDR (0x90000)
#define LINUX_CL_OFFSET 0x9000
#define LINUX_CL_END_OFFSET 0x90FF
#define LINUX_SETUP_MOVE_SIZE 0x9100
#define LINUX_CL_MAGIC 0xA33F
/*
* General disk stuff
@@ -376,7 +373,7 @@ extern char *grub_scratch_mem;
#include "mb_header.h"
#include "mb_info.h"
/* For the Linux/i386 boot protocol version 2.02. */
/* For the Linux/i386 boot protocol version 2.03. */
struct linux_kernel_header
{
char code1[0x0020];
@@ -405,7 +402,7 @@ struct linux_kernel_header
unsigned long bootsect_kludge; /* obsolete */
unsigned short heap_end_ptr; /* Free memory after setup end */
unsigned short pad1; /* Unused */
unsigned long cmd_line_ptr; /* Points to the kernel command line */
char *cmd_line_ptr; /* Points to the kernel command line */
} __attribute__ ((packed));
/* Memory map address range descriptor used by GET_MMAP_ENTRY. */
@@ -550,6 +547,8 @@ extern unsigned char force_lba;
extern char version_string[];
extern char config_file[];
extern unsigned long linux_text_len;
extern char *linux_data_tmp_addr;
extern char *linux_data_real_addr;
#ifdef GRUB_UTIL
/* If not using config file, this variable is set to zero,