Lncvrt/grub
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comply with the linux/i386 boot protocol version 2.02.

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okuji committed 2000-07-23 21:21:37 +00:00
1 parent a4a19300f1
commit c786d8603e
5 files changed
+166 -54
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stage2/shared.h
+43 -12
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@@ -135,22 +135,23 @@ extern char *grub_scratch_mem;
* Linux setup parameters
*/
#define LINUX_MAGIC_SIGNATURE 0x53726448 /* "HdrS" */
#define LINUX_DEFAULT_SETUP_SECTS 4
#define LINUX_FLAG_CAN_USE_HEAP 0x80
#define LINUX_INITRD_MAX_ADDRESS 0x3C000000
#define LINUX_MAX_SETUP_SECTS 63
#define LINUX_BOOT_LOADER_TYPE 0x71
#define LINUX_HEAP_END_OFFSET (0x7F00 - 0x200)
#define LINUX_STAGING_AREA RAW_ADDR (0x100000)
#define LINUX_SETUP RAW_ADDR (0x90000)
#define LINUX_SETUP_MAXLEN 0x1E00
#define LINUX_KERNEL RAW_ADDR (0x10000)
#define LINUX_KERNEL_MAXLEN 0x7F000
#define LINUX_SETUP_SEG 0x9020
#define LINUX_INIT_SEG 0x9000
#define LINUX_KERNEL_LEN_OFFSET 0x1F4
#define LINUX_SETUP_LEN_OFFSET 0x1F1
#define LINUX_SETUP_STACK 0x3FF4
#define LINUX_SETUP_STACK 0x7F00
#define LINUX_SETUP_LOADER 0x210
#define LINUX_SETUP_LOAD_FLAGS 0x211
#define LINUX_FLAG_BIG_KERNEL 0x1
#define LINUX_SETUP_CODE_START 0x214
#define LINUX_SETUP_INITRD 0x218
/* Linux's video mode selection support. Actually I hate it! */
#define LINUX_VID_MODE_OFFSET 0x1FA
@@ -158,12 +159,10 @@ extern char *grub_scratch_mem;
#define LINUX_VID_MODE_EXTENDED 0xFFFE
#define LINUX_VID_MODE_ASK 0xFFFD
#define CL_MY_LOCATION RAW_ADDR (0x92000)
#define CL_MY_END_ADDR RAW_ADDR (0x920FF)
#define CL_MAGIC_ADDR RAW_ADDR (0x90020)
#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 CL_OFFSET RAW_ADDR (0x90022)
/*
* General disk stuff
@@ -370,6 +369,38 @@ extern char *grub_scratch_mem;
#include "mb_header.h"
#include "mb_info.h"
/* For the Linux/i386 boot protocol version 2.02. */
struct linux_kernel_header
{
char code1[0x0020];
unsigned short cl_magic; /* Magic number 0xA33F */
unsigned short cl_offset; /* The offset of command line */
char code2[0x01F1 - 0x0020 - 2 - 2];
unsigned char setup_sects; /* The size of the setup in sectors */
unsigned short root_flags; /* If the root is mounted readonly */
unsigned short syssize; /* obsolete */
unsigned short swap_dev; /* obsolete */
unsigned short ram_size; /* obsolete */
unsigned short vid_mode; /* Video mode control */
unsigned short root_dev; /* Default root device number */
unsigned short boot_flag; /* 0xAA55 magic number */
unsigned short jump; /* Jump instruction */
unsigned long header; /* Magic signature "HdrS" */
unsigned short version; /* Boot protocol version supported */
unsigned long realmode_swtch; /* Boot loader hook */
unsigned long start_sys; /* Points to kernel version string */
unsigned char type_of_loader; /* Boot loader identifier */
unsigned char loadflags; /* Boot protocol option flags */
unsigned short setup_move_size; /* Move to high memory size */
unsigned long code32_start; /* Boot loader hook */
unsigned long ramdisk_image; /* initrd load address */
unsigned long ramdisk_size; /* initrd size */
unsigned long bootsect_kludge; /* obsolete */
unsigned long heap_end_ptr; /* Free memory after setup end */
unsigned short pad1; /* Unused */
unsigned long cmd_line_ptr; /* Points to the kernel command line */
} __attribute__ ((packed));
/* Memory map address range descriptor used by GET_MMAP_ENTRY. */
struct mmar_desc
{