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/* memory.h - describe the memory map */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2002,2007,2008 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>
#include <grub/machine/machine.h>
#ifndef ASM_FILE
#include <grub/types.h>
#include <grub/err.h>
#include <grub/memory.h>
#endif
/* 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 upper memory area (starting at 640 kiB). */
#define GRUB_MEMORY_MACHINE_UPPER 0xa0000
/* 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 flag for protected mode. */
#define GRUB_MEMORY_MACHINE_CR0_PE_ON 0x1
/* 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
#ifndef ASM_FILE
struct grub_machine_mmap_entry
{
grub_uint32_t size;
grub_uint64_t addr;
grub_uint64_t len;
#define GRUB_MACHINE_MEMORY_AVAILABLE 1
#define GRUB_MACHINE_MEMORY_RESERVED 2
#define GRUB_MACHINE_MEMORY_ACPI 3
#define GRUB_MACHINE_MEMORY_NVS 4
#define GRUB_MACHINE_MEMORY_MAX_TYPE 4
/* This one is special: it's used internally but is never reported
by firmware. */
#define GRUB_MACHINE_MEMORY_HOLE 5
grub_uint32_t type;
} __attribute__((packed));
grub_err_t EXPORT_FUNC(grub_machine_mmap_iterate)
(int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t));
grub_uint64_t grub_mmap_get_post64 (void);
grub_uint64_t grub_mmap_get_upper (void);
grub_uint64_t grub_mmap_get_lower (void);
#define GRUB_MMAP_MALLOC_LOW 1
#ifdef GRUB_MACHINE_PCBIOS
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);
#else
static inline grub_err_t
grub_machine_mmap_register (grub_uint64_t start __attribute__ ((unused)),
grub_uint64_t size __attribute__ ((unused)),
int type __attribute__ ((unused)),
int handle __attribute__ ((unused)))
{
return GRUB_ERR_NONE;
}
static inline grub_err_t
grub_machine_mmap_unregister (int handle __attribute__ ((unused)))
{
return GRUB_ERR_NONE;
}
#endif
#endif
#endif /* ! GRUB_MEMORY_MACHINE_HEADER */
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