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/* memory.h - describe the memory map */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2007,2008,2009 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_MEMORY_MACHINE_HEADER
#define GRUB_MEMORY_MACHINE_HEADER 1
#include <grub/symbol.h>
#ifndef ASM_FILE
#include <grub/types.h>
#include <grub/err.h>
#include <grub/memory.h>
#endif
#include <grub/i386/memory.h>
#include <grub/offsets.h>
/* The scratch buffer used in real mode code. */
#define GRUB_MEMORY_MACHINE_SCRATCH_ADDR 0x68000
#define GRUB_MEMORY_MACHINE_SCRATCH_SEG (GRUB_MEMORY_MACHINE_SCRATCH_ADDR >> 4)
#define GRUB_MEMORY_MACHINE_SCRATCH_SIZE 0x10000
/* The real mode stack. */
#define GRUB_MEMORY_MACHINE_REAL_STACK (0x2000 - 0x10)
/* The size of the protect mode stack. */
#define GRUB_MEMORY_MACHINE_PROT_STACK_SIZE 0x8000
/* The protected mode stack. */
#define GRUB_MEMORY_MACHINE_PROT_STACK \
(GRUB_MEMORY_MACHINE_SCRATCH_ADDR + GRUB_MEMORY_MACHINE_SCRATCH_SIZE \
+ GRUB_MEMORY_MACHINE_PROT_STACK_SIZE - 0x10)
/* The memory area where GRUB uses its own purpose. This part is not added
into free memory for dynamic allocations. */
#define GRUB_MEMORY_MACHINE_RESERVED_START \
GRUB_MEMORY_MACHINE_SCRATCH_ADDR
#define GRUB_MEMORY_MACHINE_RESERVED_END \
(GRUB_MEMORY_MACHINE_PROT_STACK + 0x10)
/* The area where GRUB is decompressed at early startup. */
#define GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR 0x100000
/* The address of a partition table passed to another boot loader. */
#define GRUB_MEMORY_MACHINE_PART_TABLE_ADDR 0x7be
/* The address where another boot loader is loaded. */
#define GRUB_MEMORY_MACHINE_BOOT_LOADER_ADDR 0x7c00
/* The code segment of the protected mode. */
#define GRUB_MEMORY_MACHINE_PROT_MODE_CSEG 0x8
/* The data segment of the protected mode. */
#define GRUB_MEMORY_MACHINE_PROT_MODE_DSEG 0x10
/* The code segment of the pseudo real mode. */
#define GRUB_MEMORY_MACHINE_PSEUDO_REAL_CSEG 0x18
/* The data segment of the pseudo real mode. */
#define GRUB_MEMORY_MACHINE_PSEUDO_REAL_DSEG 0x20
#define GRUB_MEMORY_MACHINE_BIOS_DATA_AREA_ADDR 0x400
#ifndef ASM_FILE
/* See http://heim.ifi.uio.no/~stanisls/helppc/bios_data_area.html for a
description of the BIOS Data Area layout. */
struct grub_machine_bios_data_area
{
grub_uint8_t unused1[0x17];
grub_uint8_t keyboard_flag_lower; /* 0x17 */
grub_uint8_t unused2[0xf0 - 0x18];
};
grub_err_t grub_machine_mmap_register (grub_uint64_t start, grub_uint64_t size,
int type, int handle);
grub_err_t grub_machine_mmap_unregister (int handle);
#endif
#endif /* ! GRUB_MEMORY_MACHINE_HEADER */
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