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Make struct boot_params a real structure, and remove obsolete fields 

Make struct boot_params a real structure, and remove the handling of
some obsolete fields, in particular hd*_info, which was only used by
the ST-506 driver, and likely to be wrong for that driver on any
modern BIOS.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
H. Peter Anvin 2007-07-11 12:18:35 -07:00 committed by Linus Torvalds
parent 9c25d134b3
commit 48c7ae674f
5 changed files with 94 additions and 30 deletions
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12
arch/i386/kernel/setup.c
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@ -102,19 +102,10 @@ static unsigned int highmem_pages = -1;
/*
* Setup options
*/
struct drive_info_struct { char dummy[32]; } drive_info;
#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_HD) || \
defined(CONFIG_BLK_DEV_IDE_MODULE) || defined(CONFIG_BLK_DEV_HD_MODULE)
EXPORT_SYMBOL(drive_info);
#endif
struct screen_info screen_info;
EXPORT_SYMBOL(screen_info);
struct apm_info apm_info;
EXPORT_SYMBOL(apm_info);
struct sys_desc_table_struct {
unsigned short length;
unsigned char table[0];
};
struct edid_info edid_info;
EXPORT_SYMBOL_GPL(edid_info);
struct ist_info ist_info;
@ -134,7 +125,7 @@ unsigned long saved_videomode;
static char __initdata command_line[COMMAND_LINE_SIZE];
unsigned char __initdata boot_params[PARAM_SIZE];
struct boot_params __initdata boot_params;
#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
struct edd edd;
@ -528,7 +519,6 @@ void __init setup_arch(char **cmdline_p)
#endif
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
drive_info = DRIVE_INFO;
screen_info = SCREEN_INFO;
edid_info = EDID_INFO;
apm_info.bios = APM_BIOS_INFO;

85
include/asm-i386/bootparam.h Normal file
View File

@ -0,0 +1,85 @@
#ifndef _ASM_BOOTPARAM_H
#define _ASM_BOOTPARAM_H
#include <linux/types.h>
#include <linux/screen_info.h>
#include <linux/apm_bios.h>
#include <asm/e820.h>
#include <linux/edd.h>
#include <video/edid.h>
struct setup_header {
u8 setup_sects;
u16 root_flags;
u32 syssize;
u16 ram_size;
u16 vid_mode;
u16 root_dev;
u16 boot_flag;
u16 jump;
u32 header;
u16 version;
u32 realmode_swtch;
u16 start_sys;
u16 kernel_version;
u8 type_of_loader;
u8 loadflags;
#define LOADED_HIGH 0x01
#define CAN_USE_HEAP 0x80
u16 setup_move_size;
u32 code32_start;
u32 ramdisk_image;
u32 ramdisk_size;
u32 bootsect_kludge;
u16 heap_end_ptr;
u16 _pad1;
u32 cmd_line_ptr;
u32 initrd_addr_max;
u32 kernel_alignment;
u8 relocatable_kernel;
} __attribute__((packed));
struct sys_desc_table {
u16 length;
u8 table[14];
};
struct efi_info {
u32 _pad1;
u32 efi_systab;
u32 efi_memdesc_size;
u32 efi_memdec_version;
u32 efi_memmap;
u32 fi_memmap_size;
u32 _pad2[2];
};
/* The so-called "zeropage" */
struct boot_params {
struct screen_info screen_info; /* 0x000 */
struct apm_bios_info apm_bios_info; /* 0x040 */
u8 _pad2[12]; /* 0x054 */
u32 speedstep_info[4]; /* 0x060 */
u8 _pad3[16]; /* 0x070 */
u8 hd0_info[16]; /* obsolete! */ /* 0x080 */
u8 hd1_info[16]; /* obsolete! */ /* 0x090 */
struct sys_desc_table sys_desc_table; /* 0x0a0 */
u8 _pad4[144]; /* 0x0b0 */
struct edid_info edid_info; /* 0x140 */
struct efi_info efi_info; /* 0x1c0 */
u32 alt_mem_k; /* 0x1e0 */
u32 scratch; /* Scratch field! */ /* 0x1e4 */
u8 e820_entries; /* 0x1e8 */
u8 eddbuf_entries; /* 0x1e9 */
u8 edd_mbr_sig_buf_entries; /* 0x1ea */
u8 _pad6[6]; /* 0x1eb */
struct setup_header hdr; /* setup header */ /* 0x1f1 */
u8 _pad7[0x290-0x1f1-sizeof(struct setup_header)];
u32 edd_mbr_sig_buffer[EDD_MBR_SIG_MAX]; /* 0x290 */
struct e820entry e820_map[E820MAX]; /* 0x2d0 */
u8 _pad8[48]; /* 0xcd0 */
struct edd_info eddbuf[EDDMAXNR]; /* 0xd00 */
u8 _pad9[276]; /* 0xeec */
} __attribute__((packed));
#endif /* _ASM_BOOTPARAM_H */

10
include/asm-i386/setup.h
View File

@ -26,12 +26,15 @@
#define NEW_CL_POINTER 0x228 /* Relative to real mode data */
#ifndef __ASSEMBLY__
#include <asm/bootparam.h>
/*
* This is set up by the setup-routine at boot-time
*/
extern unsigned char boot_params[PARAM_SIZE];
extern struct boot_params boot_params;
#define PARAM (boot_params)
#define PARAM ((char *)&boot_params)
#define SCREEN_INFO (*(struct screen_info *) (PARAM+0))
#define EXT_MEM_K (*(unsigned short *) (PARAM+2))
#define ALT_MEM_K (*(unsigned long *) (PARAM+0x1e0))
@ -39,8 +42,7 @@ extern unsigned char boot_params[PARAM_SIZE];
#define E820_MAP ((struct e820entry *) (PARAM+E820MAP))
#define APM_BIOS_INFO (*(struct apm_bios_info *) (PARAM+0x40))
#define IST_INFO (*(struct ist_info *) (PARAM+0x60))
#define DRIVE_INFO (*(struct drive_info_struct *) (PARAM+0x80))
#define SYS_DESC_TABLE (*(struct sys_desc_table_struct*)(PARAM+0xa0))
#define SYS_DESC_TABLE (*(struct sys_desc_table *)(PARAM+0xa0))
#define EFI_SYSTAB ((efi_system_table_t *) *((unsigned long *)(PARAM+0x1c4)))
#define EFI_MEMDESC_SIZE (*((unsigned long *) (PARAM+0x1c8)))
#define EFI_MEMDESC_VERSION (*((unsigned long *) (PARAM+0x1cc)))

16
include/asm-x86_64/boot.h
View File

@ -1,15 +1 @@
#ifndef _LINUX_BOOT_H
#define _LINUX_BOOT_H
/* Don't touch these, unless you really know what you're doing. */
#define DEF_INITSEG 0x9000
#define DEF_SYSSEG 0x1000
#define DEF_SETUPSEG 0x9020
#define DEF_SYSSIZE 0x7F00
/* Internal svga startup constants */
#define NORMAL_VGA 0xffff /* 80x25 mode */
#define EXTENDED_VGA 0xfffe /* 80x50 mode */
#define ASK_VGA 0xfffd /* ask for it at bootup */
#endif
#include <asm-i386/boot.h>

1
include/asm-x86_64/bootparam.h Normal file
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@ -0,0 +1 @@
#include <asm-i386/bootparam.h>