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/* shared.h - definitions used in all GRUB-specific code */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 1996 Erich Boleyn <erich@uruk.org>
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* Copyright (C) 1999 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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||||
* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
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||||
*
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||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
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||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* Generic defines to use anywhere
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*/
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/* Maybe redirect memory requests through grub_scratch_mem. */
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#ifdef GRUB_UTIL
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extern char *grub_scratch_mem;
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# define RAW_ADDR(x) ((x) + (int) grub_scratch_mem)
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# define RAW_SEG(x) (RAW_ADDR ((x) << 4) >> 4)
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#else
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# define RAW_ADDR(x) x
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# define RAW_SEG(x) x
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#endif
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/*
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* Integer sizes
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*/
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#define MAXINT 0x7FFFFFFF
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/* 512-byte scratch area */
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#define SCRATCHADDR RAW_ADDR (0x77e00)
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#define SCRATCHSEG RAW_SEG (0x77e0)
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/*
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* This is the location of the raw device buffer. It is 31.5K
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* in size.
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*/
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#define BUFFERLEN 0x7e00
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#define BUFFERADDR RAW_ADDR (0x70000)
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#define BUFFERSEG RAW_SEG (0x7000)
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/*
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* BIOS disk defines
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*/
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#define BIOSDISK_READ 0x0
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#define BIOSDISK_WRITE 0x1
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#define BIOSDISK_ERROR_GEOMETRY 0x100
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#define BIOSDISK_FLAG_LBA_EXTENSION 0x1
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/*
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* This is the filesystem (not raw device) buffer.
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* It is 32K in size, do not overrun!
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*/
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#define FSYS_BUFLEN 0x8000
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#define FSYS_BUF RAW_ADDR (0x68000)
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/*
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* Linux setup parameters
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*/
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#define LINUX_STAGING_AREA RAW_ADDR (0x100000)
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#define LINUX_SETUP RAW_ADDR (0x90000)
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#define LINUX_SETUP_MAXLEN 0x1E00
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#define LINUX_KERNEL RAW_ADDR (0x10000)
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#define LINUX_KERNEL_MAXLEN 0x7F000
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#define LINUX_SETUP_SEG 0x9020
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#define LINUX_INIT_SEG 0x9000
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#define LINUX_KERNEL_LEN_OFFSET 0x1F4
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#define LINUX_SETUP_LEN_OFFSET 0x1F1
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#define LINUX_SETUP_STACK 0x3FF4
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#define LINUX_SETUP_LOADER 0x210
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#define LINUX_SETUP_LOAD_FLAGS 0x211
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#define LINUX_FLAG_BIG_KERNEL 0x1
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#define LINUX_SETUP_CODE_START 0x214
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#define LINUX_SETUP_INITRD 0x218
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#define CL_MY_LOCATION RAW_ADDR (0x92000)
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#define CL_MY_END_ADDR RAW_ADDR (0x920FF)
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#define CL_MAGIC_ADDR RAW_ADDR (0x90020)
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#define CL_MAGIC 0xA33F
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#define CL_BASE_ADDR RAW_ADDR (0x90000)
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#define CL_OFFSET RAW_ADDR (0x90022)
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/*
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* General disk stuff
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*/
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#define SECTOR_SIZE 0x200
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#define BIOS_FLAG_FIXED_DISK 0x80
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#define BOOTSEC_LOCATION RAW_ADDR (0x7C00)
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#define BOOTSEC_SIGNATURE 0xAA55
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#define BOOTSEC_BPB_OFFSET 0x3
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#define BOOTSEC_BPB_LENGTH 0x3B
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#define BOOTSEC_PART_OFFSET 0x1BE
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#define BOOTSEC_PART_LENGTH 0x40
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#define BOOTSEC_SIG_OFFSET 0x1FE
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/*
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* GRUB specific information
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* (in LSB order)
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*/
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#define COMPAT_VERSION_MAJOR 2
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#define COMPAT_VERSION_MINOR 0
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#define COMPAT_VERSION ((COMPAT_VERSION_MINOR<<8)|COMPAT_VERSION_MAJOR)
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#define STAGE1_VER_MAJ_OFFS 0x1bc
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#define STAGE1_INSTALLSEG 0x1ba
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#define STAGE1_INSTALLADDR 0x1b8
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#define STAGE1_FIRSTLIST 0x1b5
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#define STAGE2_VER_MAJ_OFFS 0x6
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#define STAGE2_INSTALLPART 0x8
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#define STAGE2_VER_STR_OFFS 0xc
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/*
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* defines for use when switching between real and protected mode
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*/
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#define CR0_PE_ON 0x1
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#define CR0_PE_OFF 0xfffffffe
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#define PROT_MODE_CSEG 0x8
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#define PROT_MODE_DSEG 0x10
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#define PSEUDO_RM_CSEG 0x18
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#define PSEUDO_RM_DSEG 0x20
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#define STACKOFF 0x2000 - 0x10
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#define PROTSTACKINIT FSYS_BUF - 0x10
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/*
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* Assembly code defines
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*
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* "EXT_C" is assumed to be defined in the Makefile by the configure
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* command.
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*/
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#define ENTRY(x) .globl EXT_C(x) ; EXT_C(x) ## :
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#define VARIABLE(x) ENTRY(x)
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#define K_RDWR 0x60 /* keyboard data & cmds (read/write) */
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#define K_STATUS 0x64 /* keyboard status */
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#define K_CMD 0x64 /* keybd ctlr command (write-only) */
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#define K_OBUF_FUL 0x01 /* output buffer full */
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#define K_IBUF_FUL 0x02 /* input buffer full */
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#define KC_CMD_WIN 0xd0 /* read output port */
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#define KC_CMD_WOUT 0xd1 /* write output port */
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#define KB_OUTPUT_MASK 0xdd /* enable output buffer full interrupt
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enable data line
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enable clock line */
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#define KB_A20_ENABLE 0x02
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/* Codes for getchar. */
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#define ASCII_CHAR(x) ((x) & 0xFF)
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#if !defined(GRUB_UTIL) || !defined(HAVE_LIBCURSES)
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# define KEY_LEFT 0x4B00
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# define KEY_RIGHT 0x4D00
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# define KEY_UP 0x4800
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# define KEY_DOWN 0x5000
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# define KEY_IC 0x5200 /* insert char */
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# define KEY_DC 0x5300 /* delete char */
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# define KEY_BACKSPACE 0x0008
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# define KEY_HOME 0x4700
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# define KEY_END 0x4F00
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# define KEY_NPAGE 0x4900
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# define KEY_PPAGE 0x5100
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# define A_NORMAL 0x7
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# define A_REVERSE 0x70
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#else
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# include <curses.h>
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#endif
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/* Special graphics characters for IBM displays. */
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#define DISP_UL 218
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#define DISP_UR 191
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#define DISP_LL 192
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#define DISP_LR 217
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#define DISP_HORIZ 196
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#define DISP_VERT 179
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#define DISP_LEFT 0x1b
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#define DISP_RIGHT 0x1a
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#define DISP_UP 0x18
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#define DISP_DOWN 0x19
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/* Remap some libc-API-compatible function names so that we prevent
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circularararity. */
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#ifndef WITHOUT_LIBC_STUBS
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#define memmove grub_memmove
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#define memcpy grub_memmove /* we don't need a separate memcpy */
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#define memset grub_memset
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#define isspace grub_isspace
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#define printf grub_printf
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#undef putchar
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#define putchar grub_putchar
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#define strncat grub_strncat
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#define strstr grub_strstr
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#define strcmp grub_strcmp
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#define tolower grub_tolower
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#endif /* WITHOUT_LIBC_STUBS */
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#ifndef ASM_FILE
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/*
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* Below this should be ONLY defines and other constructs for C code.
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*/
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/* multiboot stuff */
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#include "mb_header.h"
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#include "mb_info.h"
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/* Memory map address range descriptor used by GET_MMAP_ENTRY. */
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struct mmar_desc
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{
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unsigned long desc_len; /* Size of this descriptor. */
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unsigned long long addr; /* Base address. */
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unsigned long long length; /* Length in bytes. */
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unsigned long type; /* Type of address range. */
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};
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#undef NULL
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#define NULL ((void *) 0)
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/* Error codes (descriptions are in common.c) */
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typedef enum
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{
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ERR_NONE = 0,
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ERR_BAD_FILENAME,
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ERR_BAD_FILETYPE,
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ERR_BAD_GZIP_DATA,
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ERR_BAD_GZIP_HEADER,
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ERR_BAD_PART_TABLE,
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ERR_BAD_VERSION,
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ERR_BELOW_1MB,
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ERR_BOOT_COMMAND,
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ERR_BOOT_FAILURE,
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||||
ERR_BOOT_FEATURES,
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ERR_DEV_FORMAT,
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ERR_DEV_VALUES,
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ERR_EXEC_FORMAT,
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ERR_FILELENGTH,
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ERR_FILE_NOT_FOUND,
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ERR_FSYS_CORRUPT,
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ERR_FSYS_MOUNT,
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ERR_GEOM,
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ERR_NEED_LX_KERNEL,
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ERR_NEED_MB_KERNEL,
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ERR_NO_DISK,
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ERR_NO_PART,
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ERR_NUMBER_PARSING,
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ERR_OUTSIDE_PART,
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ERR_READ,
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||||
ERR_SYMLINK_LOOP,
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ERR_UNRECOGNIZED,
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ERR_WONT_FIT,
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ERR_WRITE,
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MAX_ERR_NUM
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} grub_error_t;
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extern unsigned long install_partition;
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extern unsigned long boot_drive;
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extern char version_string[];
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extern char config_file[];
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#ifdef GRUB_UTIL
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/* If not using config file, this variable is set to zero,
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otherwise non-zero. */
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extern int use_config_file;
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/* If not using curses, this variable is set to zero, otherwise non-zero. */
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extern int use_curses;
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/* The flag for verbose messages. */
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extern int verbose;
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/* The flag for read-only. */
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extern int read_only;
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#endif
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#ifndef STAGE1_5
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/* GUI interface variables. */
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extern int fallback;
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extern char *password;
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extern char commands[];
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#endif
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#ifndef NO_DECOMPRESSION
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extern int no_decompression;
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extern int compressed_file;
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#endif
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#ifndef STAGE1_5
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/* instrumentation variables */
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||||
extern void (*debug_fs) (int);
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extern void (*debug_fs_func) (int);
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/* The flag for debug mode. */
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extern int debug;
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/* Color settings */
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extern int normal_color, highlight_color;
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#endif /* STAGE1_5 */
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extern unsigned long current_drive;
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extern unsigned long current_partition;
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extern int fsys_type;
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#ifndef NO_BLOCK_FILES
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||||
extern int block_file;
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||||
#endif /* NO_BLOCK_FILES */
|
||||
|
||||
/* The information for a disk geometry. The CHS information is only for
|
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DOS/Partition table compatibility, and the real number of sectors is
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stored in TOTAL_SECTORS. */
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struct geometry
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{
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/* The number of cylinders */
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unsigned long cylinders;
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/* The number of heads */
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unsigned long heads;
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/* The number of sectors */
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unsigned long sectors;
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/* The total number of sectors */
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unsigned long total_sectors;
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/* Flags */
|
||||
unsigned long flags;
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||||
};
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||||
|
||||
extern long part_start;
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extern long part_length;
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|
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extern int current_slice;
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||||
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extern int buf_drive;
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extern int buf_track;
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||||
extern struct geometry buf_geom;
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||||
|
||||
/* these are the current file position and maximum file position */
|
||||
extern int filepos;
|
||||
extern int filemax;
|
||||
|
||||
/*
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||||
* Common BIOS/boot data.
|
||||
*/
|
||||
|
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extern struct multiboot_info mbi;
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||||
extern unsigned long saved_drive;
|
||||
extern unsigned long saved_partition;
|
||||
extern unsigned long saved_mem_upper;
|
||||
|
||||
/*
|
||||
* Error variables.
|
||||
*/
|
||||
|
||||
extern grub_error_t errnum;
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extern char *err_list[];
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||||
/* Simplify declaration of entry_addr. */
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typedef void (*entry_func) (int, int, int, int, int, int)
|
||||
__attribute__ ((noreturn));
|
||||
|
||||
/* Maximum command line size. Before you blindly increase this value,
|
||||
see the comment in char_io.c (get_cmdline). */
|
||||
#define MAX_CMDLINE 1600
|
||||
#define NEW_HEAPSIZE 1500
|
||||
extern char *cur_cmdline;
|
||||
extern entry_func entry_addr;
|
||||
|
||||
/* Enter the stage1.5/stage2 C code after the stack is set up. */
|
||||
void cmain (void);
|
||||
|
||||
/* Halt the processor (called after an unrecoverable error). */
|
||||
void stop (void) __attribute__ ((noreturn));
|
||||
|
||||
/* calls for direct boot-loader chaining */
|
||||
void chain_stage1 (int segment, int offset, int part_table_addr)
|
||||
__attribute__ ((noreturn));
|
||||
void chain_stage2 (int segment, int offset) __attribute__ ((noreturn));
|
||||
|
||||
/* do some funky stuff, then boot linux */
|
||||
void linux_boot (void) __attribute__ ((noreturn));
|
||||
|
||||
/* do some funky stuff, then boot bzImage linux */
|
||||
void big_linux_boot (void) __attribute__ ((noreturn));
|
||||
|
||||
/* booting a multiboot executable */
|
||||
void multi_boot (int start, int mbi) __attribute__ ((noreturn));
|
||||
|
||||
/* If LINEAR is nonzero, then set the Intel processor to linear mode.
|
||||
Otherwise, bit 20 of all memory accesses is always forced to zero,
|
||||
causing a wraparound effect for bugwards compatibility with the
|
||||
8086 CPU. */
|
||||
void gateA20 (int linear);
|
||||
|
||||
/* memory probe routines */
|
||||
int get_memsize (int type);
|
||||
int get_eisamemsize (void);
|
||||
|
||||
/* Fetch the next entry in the memory map and return the continuation
|
||||
value. DESC is a pointer to the descriptor buffer, and CONT is the
|
||||
previous continuation value (0 to get the first entry in the
|
||||
map). */
|
||||
int get_mmap_entry (struct mmar_desc *desc, int cont);
|
||||
|
||||
/* Return the data area immediately following our code. */
|
||||
int get_code_end (void);
|
||||
|
||||
/* low-level timing info */
|
||||
int getrtsecs (void);
|
||||
|
||||
/* Clear the screen. */
|
||||
void cls (void);
|
||||
|
||||
#ifndef GRUB_UTIL
|
||||
/* Turn off cursor. */
|
||||
void nocursor (void);
|
||||
#endif
|
||||
|
||||
/* Get the current cursor position (where 0,0 is the top left hand
|
||||
corner of the screen). Returns packed values, (RET >> 8) is x,
|
||||
(RET & 0xff) is y. */
|
||||
int getxy (void);
|
||||
|
||||
/* Set the cursor position. */
|
||||
void gotoxy (int x, int y);
|
||||
|
||||
/* Displays an ASCII character. IBM displays will translate some
|
||||
characters to special graphical ones (see the DISP_* constants). */
|
||||
void grub_putchar (int c);
|
||||
|
||||
/* Wait for a keypress, and return its packed BIOS/ASCII key code.
|
||||
Use ASCII_CHAR(ret) to extract the ASCII code. */
|
||||
int getkey (void);
|
||||
|
||||
/* Like GETKEY, but doesn't block, and returns -1 if no keystroke is
|
||||
available. */
|
||||
int checkkey (void);
|
||||
|
||||
/* Sets text mode character attribute at the cursor position. See A_*
|
||||
constants defined above. */
|
||||
void set_attrib (int attr);
|
||||
|
||||
/* Low-level disk I/O */
|
||||
int get_diskinfo (int drive, struct geometry *geometry);
|
||||
int biosdisk (int read, int drive, struct geometry *geometry,
|
||||
int sector, int nsec, int segment);
|
||||
void stop_floppy (void);
|
||||
|
||||
/* Command-line interface functions. */
|
||||
#ifndef STAGE1_5
|
||||
char *skip_to (int after_equal, char *cmdline);
|
||||
void init_cmdline (void);
|
||||
|
||||
/* The constants for the return value of enter_cmdline. */
|
||||
typedef enum
|
||||
{
|
||||
CMDLINE_OK = 0,
|
||||
CMDLINE_ABORT,
|
||||
CMDLINE_ERROR
|
||||
} cmdline_t;
|
||||
|
||||
/* Run the command-line interface or execute a command from SCRIPT if
|
||||
SCRIPT is not NULL. Return CMDLINE_OK if successful, CMDLINE_ABORT
|
||||
if ``quit'' command is executed, and CMDLINE_ERROR if an error
|
||||
occures or ESC is pushed. */
|
||||
cmdline_t enter_cmdline (char *script, char *heap);
|
||||
#endif
|
||||
|
||||
/* C library replacement functions with identical semantics. */
|
||||
void grub_printf (char *format,...);
|
||||
int grub_tolower (int c);
|
||||
int grub_isspace (int c);
|
||||
int grub_strncat (char *s1, char *s2, int n);
|
||||
char *grub_memmove (char *to, char *from, int len);
|
||||
void *grub_memset (void *start, int c, int len);
|
||||
char *grub_strstr (char *s1, char *s2);
|
||||
int grub_strcmp (char *s1, char *s2);
|
||||
|
||||
/* misc */
|
||||
void init_page (void);
|
||||
void print_error (void);
|
||||
char *convert_to_ascii (char *buf, int c,...);
|
||||
int get_cmdline (char *prompt, char *commands, char *cmdline,
|
||||
int maxlen, int echo_char);
|
||||
int substring (char *s1, char *s2);
|
||||
int get_based_digit (int c, int base);
|
||||
int safe_parse_maxint (char **str_ptr, int *myint_ptr);
|
||||
int memcheck (int start, int len);
|
||||
|
||||
#ifndef NO_DECOMPRESSION
|
||||
/* Compression support. */
|
||||
int gunzip_test_header (void);
|
||||
int gunzip_read (char *buf, int len);
|
||||
#endif /* NO_DECOMPRESSION */
|
||||
|
||||
int rawread (int drive, int sector, int byte_offset, int byte_len, char *buf);
|
||||
int devread (int sector, int byte_offset, int byte_len, char *buf);
|
||||
|
||||
/* Parse a device string and initialize the global parameters. */
|
||||
char *set_device (char *device);
|
||||
int open_device (void);
|
||||
int open_partition (void);
|
||||
|
||||
/* Sets device to the one represented by the SAVED_* parameters. */
|
||||
int make_saved_active (void);
|
||||
|
||||
/* Open a file or directory on the active device, using GRUB's
|
||||
internal filesystem support. */
|
||||
int grub_open (char *filename);
|
||||
|
||||
/* Read LEN bytes into BUF from the file that was opened with
|
||||
GRUB_OPEN. If LEN is -1, read all the remaining data in the file */
|
||||
int grub_read (char *buf, int len);
|
||||
|
||||
/* List the contents of the directory that was opened with GRUB_OPEN,
|
||||
printing all completions. */
|
||||
int dir (char *dirname);
|
||||
|
||||
int set_bootdev (int hdbias);
|
||||
|
||||
/* Display statistics on the current active device. */
|
||||
void print_fsys_type (void);
|
||||
|
||||
/* Display device and filename completions. */
|
||||
void print_a_completion (char *filename);
|
||||
void print_completions (char *filename);
|
||||
|
||||
/* Copies the current partition data to the desired address. */
|
||||
void copy_current_part_entry (char *buf);
|
||||
|
||||
void bsd_boot (int type, int bootdev) __attribute__ ((noreturn));
|
||||
int load_image (void);
|
||||
int load_module (void);
|
||||
int load_initrd (void);
|
||||
|
||||
void init_bios_info (void);
|
||||
|
||||
#endif /* ASM_FILE */
|
||||
Reference in new issue
Block a user