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This patch is to introduce multiboot 2 loading capabilities to grub2

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for powerpc & i386-pc. This patch was more so started by Hollis
Blanchard getting multiboot 2 working for powerpc and I added to it
and cleaned it up.

One of the ideas with this patch is to keep everything under one
command for the user. So instead of having a "multiboot2" & "module2"
command, I created a proxy like mechanism so that you have only one
command for both multiboot 1 & 2 ... "multiboot". This is where
"loader/multiboot_loader.c" comes from. I could have integrated things
more but I figure the current approach will less likely break
anything.

So if your OS is multiboot 2 capable, the user would do the following
to load it up from a grub prompt:

grub> multiboot <location of kernel> <kernel args>
grub> module <some image> <multiboot tag> <image arguments>
grub> module <isome mage> <multiboot tag> <image arguments>
grub .....


The other thing that this patch does is it begins to make the
multiboot 1 code a bit more architecture agnostic so IF someone wanted
to implement it on another architecture they can.

A bit of file moving around and definition renaming is also apart of
this patch. I have also taken the time to make sure that it does not
break multiboot 1 loading on i386-pc. But mulitboot 2 may still need a
little more testing and work for i386-pc. Powerpc multiboot 2 has been
heavily tested and does work.
This commit is contained in:
jerone 2007-07-25 00:44:03 +00:00
parent daf0f0ba3e
commit e5dfe7775a
17 changed files with 1315 additions and 300 deletions
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119
include/grub/multiboot.h Normal file
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/* multiboot.h - multiboot header file with grub definitions. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2003,2007 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_MULTIBOOT_HEADER
#define GRUB_MULTIBOOT_HEADER 1
#include <multiboot.h>
void grub_multiboot (int argc, char *argv[]);
void grub_module (int argc, char *argv[]);
#ifndef ASM_FILE
#include <grub/types.h>
struct grub_multiboot_header
{
/* Must be MULTIBOOT_MAGIC - see above. */
grub_uint32_t magic;
/* Feature flags. */
grub_uint32_t flags;
/* The above fields plus this one must equal 0 mod 2^32. */
grub_uint32_t checksum;
/* These are only valid if MULTIBOOT_AOUT_KLUDGE is set. */
grub_uint32_t header_addr;
grub_uint32_t load_addr;
grub_uint32_t load_end_addr;
grub_uint32_t bss_end_addr;
grub_uint32_t entry_addr;
/* These are only valid if MULTIBOOT_VIDEO_MODE is set. */
grub_uint32_t mode_type;
grub_uint32_t width;
grub_uint32_t height;
grub_uint32_t depth;
};
struct grub_multiboot_info
{
/* Multiboot info version number */
grub_uint32_t flags;
/* Available memory from BIOS */
grub_uint32_t mem_lower;
grub_uint32_t mem_upper;
/* "root" partition */
grub_uint32_t boot_device;
/* Kernel command line */
grub_uint32_t cmdline;
/* Boot-Module list */
grub_uint32_t mods_count;
grub_uint32_t mods_addr;
grub_uint32_t syms[4];
/* Memory Mapping buffer */
grub_uint32_t mmap_length;
grub_uint32_t mmap_addr;
/* Drive Info buffer */
grub_uint32_t drives_length;
grub_uint32_t drives_addr;
/* ROM configuration table */
grub_uint32_t config_table;
/* Boot Loader Name */
grub_uint32_t boot_loader_name;
/* APM table */
grub_uint32_t apm_table;
/* Video */
grub_uint32_t vbe_control_info;
grub_uint32_t vbe_mode_info;
grub_uint16_t vbe_mode;
grub_uint16_t vbe_interface_seg;
grub_uint16_t vbe_interface_off;
grub_uint16_t vbe_interface_len;
};
struct grub_mod_list
{
/* the memory used goes from bytes 'mod_start' to 'mod_end-1' inclusive */
grub_uint32_t mod_start;
grub_uint32_t mod_end;
/* Module command line */
grub_uint32_t cmdline;
/* padding to take it to 16 bytes (must be zero) */
grub_uint32_t pad;
};
#endif /* ! ASM_FILE */
#endif /* ! GRUB_MULTIBOOT_HEADER */