441 lines
11 KiB
C
441 lines
11 KiB
C
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/*
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* Copyright (C) 2001-2003 Hewlett-Packard Co.
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* Contributed by Stephane Eranian <eranian@hpl.hp.com>
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* Contributed by Mike Johnston <johnston@intel.com>
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* Contributed by Chris Ahna <christopher.j.ahna@intel.com>
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*
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* This file is part of the ELILO, the EFI Linux boot loader.
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*
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* ELILO 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, or (at your option)
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* any later version.
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*
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* ELILO 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
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* 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
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* along with ELILO; see the file COPYING. If not, write to the Free
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* Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Please check out the elilo.txt for complete documentation on how
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* to use this program.
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*/
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/*
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* This file is used to define all the IA32-specific data structures
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* and constant used by the generic ELILO
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*/
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#ifndef __ELILO_SYSDEPS_IA32_H__
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#define __ELILO_SYSDEPS_IA32_H__
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#define ELILO_ARCH "IA-32" /* ASCII string */
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/* for now use library versions */
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#define Memset(a,v,n) SetMem((a),(n),(v))
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#define Memcpy(a,b,n) CopyMem((a),(b),(n))
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/*
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* This version must match the one in the kernel.
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*
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* This table was put together using information from the
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* following Linux kernel source files:
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* linux/include/tty.h
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* linux/arch/i386/kernel/setup.c
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* linux/arch/i386/boot/bootsect.S
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* linux/arch/i386/boot/setup.S
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* linux/arch/i386/boot/video.S
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*
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* New fields in this structure for EFI and ELILO are:
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* efi_loader_sig
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* efi_st_addr
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*
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* A new bit, LDRFLAG_BOOT_PARAM_RELOC, in the loader_flags
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* field is also defined in this file.
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*/
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typedef struct efi_ia32_boot_params {
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UINT32 size;
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UINT32 command_line;
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UINT32 efi_sys_tbl;
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UINT32 efi_mem_map;
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UINT32 efi_mem_map_size;
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UINT32 efi_mem_desc_size;
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UINT32 efi_mem_desc_version;
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UINT32 initrd_start;
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UINT32 initrd_size;
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UINT32 loader_start;
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UINT32 loader_size;
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UINT32 kernel_start;
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UINT32 kernel_size;
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UINT16 num_cols;
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UINT16 num_rows;
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UINT16 orig_x;
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UINT16 orig_y;
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} efi_ia32_boot_params_t;
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extern efi_ia32_boot_params_t efi_ia32_bp;
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#pragma pack(1)
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typedef union ia32_boot_params {
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UINT8 raw[0x2000];
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struct {
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/* Cursor position before passing control to kernel. */
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/* 0x00 */ UINT8 orig_cursor_col; /* LDR */
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/* 0x01 */ UINT8 orig_cursor_row; /* LDR */
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/* Available contiguous extended memory in KB. */
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/* 0x02 */ UINT16 ext_mem_k; /* LDR */
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/* Video page, mode and screen width before passing control to kernel. */
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/* 0x04 */ UINT16 orig_video_page; /* LDR */
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/* 0x06 */ UINT8 orig_video_mode; /* LDR */
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/* 0x07 */ UINT8 orig_video_cols; /* LDR */
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/* 0x08 */ UINT16 unused_1; /* unused */
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/* %%TBD */
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/* 0x0A */ UINT16 orig_ega_bx; /* LDR */
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/* 0x0C */ UINT16 unused_2; /* unused */
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/* Screen height before passing control to kernel. */
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/* 0x0E */ UINT8 orig_video_rows; /* LDR */
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/* %%TBD */
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/* 0x0F */ UINT8 is_vga; /* LDR */
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/* 0x10 */ UINT16 orig_video_points; /* LDR */
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/* %%TBD */
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/* 0x12 */ UINT16 lfb_width; /* LDR */
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/* 0x14 */ UINT16 lfb_height; /* LDR */
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/* 0x16 */ UINT16 lfb_depth; /* LDR */
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/* 0x18 */ UINT32 lfb_base; /* LDR */
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/* 0x1C */ UINT32 lfb_size; /* LDR */
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/* Offset of command line (from start of ia32_boot_param struct). */
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/* The command line magik number must be set for the kernel setup */
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/* code to use the command line offset. */
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/* 0x20 */ UINT16 cmdline_magik; /* LDR */
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#define CMDLINE_MAGIK 0xA33F
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/* 0x22 */ UINT16 cmdline_offset; /* LDR */
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/* %%TBD */
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/* 0x24 */ UINT16 lfb_line_len; /* LDR */
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/* %%TBD */
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/* 0x26 */ UINT8 lfb_red_size; /* LDR */
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/* 0x27 */ UINT8 lfb_red_pos; /* LDR */
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/* 0x28 */ UINT8 lfb_green_size; /* LDR */
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/* 0x29 */ UINT8 lfb_green_pos; /* LDR */
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/* 0x2A */ UINT8 lfb_blue_size; /* LDR */
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/* 0x2B */ UINT8 lfb_blue_pos; /* LDR */
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/* 0x2C */ UINT8 lfb_rsvd_size; /* LDR */
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/* 0x2D */ UINT8 lfb_rsvd_pos; /* LDR */
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/* %%TBD */
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/* 0x2E */ UINT16 vesa_seg; /* LDR */
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/* 0x30 */ UINT16 vesa_off; /* LDR */
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/* %%TBD */
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/* 0x32 */ UINT16 lfb_pages; /* LDR */
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/* 0x34 */ UINT8 lfb_reserved[0x0C]; /* reserved */
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/* %%TBD */
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/* 0x40 */ UINT16 apm_bios_ver; /* LDR */
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#define NO_APM_BIOS 0x0000
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/* %%TBD */
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/* 0x42 */ UINT16 bios_code_seg; /* LDR */
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/* 0x44 */ UINT32 bios_entry_point; /* LDR */
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/* 0x48 */ UINT16 bios_code_seg16; /* LDR */
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/* 0x4A */ UINT16 bios_data_seg; /* LDR */
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/* %%TBD */
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/* 0x4C */ UINT16 apm_bios_flags; /* LDR */
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#define NO_32BIT_APM_MASK 0xFFFD
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/* %%TBD */
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/* 0x4E */ UINT32 bios_code_len; /* LDR */
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/* 0x52 */ UINT16 bios_data_len; /* LDR */
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/* 0x54 */ UINT8 unused_3[0x2C]; /* unused */
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/* %%TBD */
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/* 0x80 */ UINT8 hd0_info[0x10]; /* LDR */
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/* 0x90 */ UINT8 hd1_info[0x10]; /* LDR */
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/* %%TBD */
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/* 0xA0 */ UINT16 mca_info_len; /* LDR */
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/* 0xA2 */ UINT8 mca_info_buf[0x10]; /* LDR */
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/* 0xB2 */ UINT8 unused_4[0x10E]; /* unused */
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/* EFI boot loader signature. */
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/* 0x1C0 */ UINT8 efi_loader_sig[4]; /* LDR */
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#define EFI_LOADER_SIG "EFIL"
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/* Address of the EFI system table. */
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/* 0x1C4 */ UINT32 efi_sys_tbl; /* LDR */
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/* EFI memory descriptor size. */
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/* 0x1C8 */ UINT32 efi_mem_desc_size; /* LDR */
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/* EFI memory descriptor version. */
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/* 0x1CC */ UINT32 efi_mem_desc_ver; /* LDR */
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/* Address & size of EFI memory map. */
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/* 0x1D0 */ UINT32 efi_mem_map; /* LDR */
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/* 0x1D4 */ UINT32 efi_mem_map_size; /* LDR */
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/* Address & size of loader. */
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/* 0x1D8 */ UINT32 loader_start; /* LDR */
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/* 0x1DC */ UINT32 loader_size; /* LDR */
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/* Available contiguous extended memory in KB. */
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/* 0x1E0 */ UINT32 alt_mem_k; /* LDR */
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/* 0x1E4 */ UINT8 unused_5[0x0D]; /* unused */
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/* Size of setup code in sectors (1 sector == 512 bytes). */
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/* 0x1F1 */ UINT8 setup_sectors; /* BLD */
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/* %%TBD */
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/* 0x1F2 */ UINT16 mount_root_rdonly; /* BLD */
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/* %%TBD */
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/* 0x1F4 */ UINT16 sys_size; /* BLD */
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/* %%TBD */
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/* 0x1F6 */ UINT16 swap_dev; /* BLD */
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/* %%TBD */
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/* 0x1F8 */ UINT16 ramdisk_flags; /* BLD */
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#define RAMDISK_PROMPT 0x8000
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#define RAMDISK_LOAD 0x4000
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/* %%TBD */
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/* 0x1FA */ UINT16 video_mode_flag; /* BLD */
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/* %%TBD */
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/* 0x1FC */ UINT16 orig_root_dev; /* BLD */
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/* 0x1FE */ UINT8 unused_6; /* unused */
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/* %%TBD */
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/* 0x1FF */ UINT8 aux_dev_info; /* LDR */
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#define NO_MOUSE 0x00
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#define FOUND_MOUSE 0xAA
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/* Jump past setup data (not used in EFI). */
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/* 0x200 */ UINT16 jump; /* BLD */
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/* Setup data signature. */
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/* 0x202 */ UINT8 setup_sig[4]; /* BLD */
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#define SETUP_SIG "HdrS"
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/* %%TBD */
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/* 0x206 */ UINT8 hdr_minor; /* BLD */
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/* 0x207 */ UINT8 hdr_major; /* BLD */
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/* %%TBD */
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/* 0x208 */ UINT32 rm_switch; /* LDD */
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/* %%TBD */
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/* 0x20C */ UINT16 start_sys_seg; /* BLD */
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/* %%TBD */
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/* 0x20E */ UINT16 kernel_verstr_offset; /* BLD */
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/* Loader type & version. */
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/* 0x210 */ UINT8 loader_type; /* LDR */
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#define LDRTYPE_ELILO 0x50 /* 5?h == elilo */
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/* ?0h == revision */
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/* 0x211 */ UINT8 loader_flags; /* BLD and LDR */
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#define LDRFLAG_CAN_USE_HEAP 0x80
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#define LDRFLAG_BOOT_PARAM_RELOC 0x40
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/* %%TBD */
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/* 0x212 */ UINT16 setup_move_size; /* BLD */
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/* %%TBD */
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/* 0x214 */ UINT32 kernel_start; /* LDR */
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/* %%TBD */
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/* 0x218 */ UINT32 initrd_start; /* LDR */
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/* 0x21C */ UINT32 initrd_size; /* LDR */
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/* %%TBD */
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/* 0x220 */ UINT32 bootsect_helper; /* BLD */
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/* %%TBD */
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/* 0x224 */ UINT16 heap_end_ptr; /* LDR */
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/* %%TBD */
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/* 0x226 */ UINT32 base_mem_size; /* LDR */
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} s;
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} boot_params_t;
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#pragma pack()
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/*
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* The stuff below here is for jumping to the kernel.
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*/
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/*
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* Some macros to copy and set memory after EFI has been
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* stopped.
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*/
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#define MEMCPY(to, from, cnt) { \
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UINT8 *t = (UINT8 *)(to); \
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UINT8 *f = (UINT8 *)(from); \
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UINTN n = cnt; \
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if (t && f && n) { \
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while (n--) { \
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*t++ = *f++; \
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} \
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} \
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}
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#define MEMSET(ptr, size, val) { \
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UINT8 *p = (UINT8 *)(ptr); \
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UINTN n = (UINTN)(size); \
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UINT8 v = (UINT8)(val); \
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if (p && n) { \
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while (n--) { \
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*p++ = v; \
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} \
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} \
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}
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/*
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* Descriptor table pointer format.
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*/
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#pragma pack(1)
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typedef struct {
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UINT16 limit;
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UINT32 base;
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} dt_addr_t;
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#pragma pack()
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extern UINTN high_base_mem;
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extern UINTN high_ext_mem;
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extern boot_params_t *param_start;
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extern UINTN param_size;
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extern VOID *kernel_start;
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extern UINTN kernel_size;
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extern VOID *initrd_start;
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extern UINTN initrd_size;
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extern dt_addr_t gdt_addr;
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extern dt_addr_t idt_addr;
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extern UINT16 init_gdt[];
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extern UINTN sizeof_init_gdt;
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extern UINT8 rmswitch_image[];
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extern UINTN rmswitch_size;
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extern INTN ia32_use_legacy_free_boot();
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/*
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* How to jump to kernel code
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*/
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static inline void
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start_kernel(VOID *kentry, boot_params_t *bp)
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{
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/*
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* Disable interrupts.
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*/
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asm volatile ( "cli" : : );
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/*
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* Relocate initrd, if present.
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*/
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if (bp->s.initrd_start) {
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/* %%TBD */
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MEMCPY(15 * 1024 * 1024, bp->s.initrd_start, bp->s.initrd_size);
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bp->s.initrd_start = 15 * 1024 * 1024;
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||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copy boot sector, setup data and command line
|
||
|
|
* to final resting place. We need to copy
|
||
|
|
* BOOT_PARAM_MEMSIZE bytes.
|
||
|
|
*/
|
||
|
|
|
||
|
|
MEMCPY(high_base_mem, bp, 0x4000);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* initialize efi ia32 boot params and place them at 1kb up from
|
||
|
|
* the start of the boot command line param. This results in the
|
||
|
|
* efi ia32 boot params to be copied to 0x00104c00. See bootparams.c
|
||
|
|
* for details on how this is arranged. EFI enabled
|
||
|
|
* kernels will look for the efi boot params here to know if the
|
||
|
|
* kernel is booting on an EFI platform or legacy BIOS based platfrom
|
||
|
|
*/
|
||
|
|
|
||
|
|
efi_ia32_bp.initrd_start = bp->s.initrd_start;
|
||
|
|
efi_ia32_bp.initrd_size = bp->s.initrd_size;
|
||
|
|
|
||
|
|
MEMCPY(high_base_mem + 0x4000 - 0x0400, &efi_ia32_bp, sizeof(efi_ia32_bp));
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Initialize Linux GDT.
|
||
|
|
*/
|
||
|
|
|
||
|
|
MEMSET(gdt_addr.base, gdt_addr.limit, 0);
|
||
|
|
MEMCPY(gdt_addr.base, init_gdt, sizeof_init_gdt);
|
||
|
|
|
||
|
|
if (! ia32_use_legacy_free_boot()) {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Copy our real mode transition code to 0x7C00.
|
||
|
|
*/
|
||
|
|
|
||
|
|
MEMCPY(0x7C00, rmswitch_image, rmswitch_size);
|
||
|
|
|
||
|
|
asm volatile ( "movl $0x7C00, %%ebx" : : );
|
||
|
|
asm volatile ( "jmp *%%ebx" : : );
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Load descriptor table pointers.
|
||
|
|
*/
|
||
|
|
|
||
|
|
asm volatile ( "lidt %0" : : "m" (idt_addr) );
|
||
|
|
asm volatile ( "lgdt %0" : : "m" (gdt_addr) );
|
||
|
|
|
||
|
|
/*
|
||
|
|
* ebx := 0 (%%TBD - do not know why, yet)
|
||
|
|
* ecx := kernel entry point
|
||
|
|
* esi := address of boot sector and setup data
|
||
|
|
*/
|
||
|
|
|
||
|
|
asm volatile ( "movl %0, %%esi" : : "m" (high_base_mem) );
|
||
|
|
asm volatile ( "movl %0, %%ecx" : : "m" (kentry) );
|
||
|
|
asm volatile ( "xorl %%ebx, %%ebx" : : );
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Jump to kernel entry point.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
asm volatile ( "jmp *%%ecx" : : );
|
||
|
|
}
|
||
|
|
|
||
|
|
typedef struct sys_img_options {
|
||
|
|
UINT8 nothing_yet;
|
||
|
|
} sys_img_options_t;
|
||
|
|
|
||
|
|
#endif /* __ELILO_SYSDEPS_IA32_H__ */
|