1 /* memory.h - describe the memory map */
3 * GRUB -- GRand Unified Bootloader
4 * Copyright (C) 2002,2007,2008 Free Software Foundation, Inc.
6 * GRUB is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * GRUB is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
20 #ifndef GRUB_MEMORY_MACHINE_HEADER
21 #define GRUB_MEMORY_MACHINE_HEADER 1
23 #include <grub/symbol.h>
24 #include <grub/machine/machine.h>
26 #include <grub/types.h>
28 #include <grub/memory.h>
31 /* The scratch buffer used in real mode code. */
32 #define GRUB_MEMORY_MACHINE_SCRATCH_ADDR 0x68000
33 #define GRUB_MEMORY_MACHINE_SCRATCH_SEG (GRUB_MEMORY_MACHINE_SCRATCH_ADDR >> 4)
34 #define GRUB_MEMORY_MACHINE_SCRATCH_SIZE 0x10000
36 /* The real mode stack. */
37 #define GRUB_MEMORY_MACHINE_REAL_STACK (0x2000 - 0x10)
39 /* The size of the protect mode stack. */
40 #define GRUB_MEMORY_MACHINE_PROT_STACK_SIZE 0x8000
42 /* The upper memory area (starting at 640 kiB). */
43 #define GRUB_MEMORY_MACHINE_UPPER 0xa0000
45 /* The protected mode stack. */
46 #define GRUB_MEMORY_MACHINE_PROT_STACK \
47 (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + GRUB_MEMORY_MACHINE_SCRATCH_SIZE \
48 + GRUB_MEMORY_MACHINE_PROT_STACK_SIZE - 0x10)
50 /* The memory area where GRUB uses its own purpose. This part is not added
51 into free memory for dynamic allocations. */
52 #define GRUB_MEMORY_MACHINE_RESERVED_START \
53 GRUB_MEMORY_MACHINE_SCRATCH_ADDR
54 #define GRUB_MEMORY_MACHINE_RESERVED_END \
55 (GRUB_MEMORY_MACHINE_PROT_STACK + 0x10)
57 /* The area where GRUB is decompressed at early startup. */
58 #define GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR 0x100000
60 /* The address of a partition table passed to another boot loader. */
61 #define GRUB_MEMORY_MACHINE_PART_TABLE_ADDR 0x7be
63 /* The address where another boot loader is loaded. */
64 #define GRUB_MEMORY_MACHINE_BOOT_LOADER_ADDR 0x7c00
66 /* The flag for protected mode. */
67 #define GRUB_MEMORY_MACHINE_CR0_PE_ON 0x1
69 /* The code segment of the protected mode. */
70 #define GRUB_MEMORY_MACHINE_PROT_MODE_CSEG 0x8
72 /* The data segment of the protected mode. */
73 #define GRUB_MEMORY_MACHINE_PROT_MODE_DSEG 0x10
75 /* The code segment of the pseudo real mode. */
76 #define GRUB_MEMORY_MACHINE_PSEUDO_REAL_CSEG 0x18
78 /* The data segment of the pseudo real mode. */
79 #define GRUB_MEMORY_MACHINE_PSEUDO_REAL_DSEG 0x20
83 struct grub_machine_mmap_entry
88 #define GRUB_MACHINE_MEMORY_AVAILABLE 1
89 #define GRUB_MACHINE_MEMORY_RESERVED 2
90 #define GRUB_MACHINE_MEMORY_ACPI 3
91 #define GRUB_MACHINE_MEMORY_NVS 4
92 #define GRUB_MACHINE_MEMORY_MAX_TYPE 4
93 /* This one is special: it's used internally but is never reported
95 #define GRUB_MACHINE_MEMORY_HOLE 5
98 } __attribute__((packed
));
100 grub_err_t
EXPORT_FUNC(grub_machine_mmap_iterate
)
101 (int NESTED_FUNC_ATTR (*hook
) (grub_uint64_t
, grub_uint64_t
, grub_uint32_t
));
103 grub_uint64_t
grub_mmap_get_post64 (void);
104 grub_uint64_t
grub_mmap_get_upper (void);
105 grub_uint64_t
grub_mmap_get_lower (void);
107 #define GRUB_MMAP_MALLOC_LOW 1
109 #ifdef GRUB_MACHINE_PCBIOS
110 grub_err_t
grub_machine_mmap_register (grub_uint64_t start
, grub_uint64_t size
,
111 int type
, int handle
);
112 grub_err_t
grub_machine_mmap_unregister (int handle
);
114 static inline grub_err_t
115 grub_machine_mmap_register (grub_uint64_t start
__attribute__ ((unused
)),
116 grub_uint64_t size
__attribute__ ((unused
)),
117 int type
__attribute__ ((unused
)),
118 int handle
__attribute__ ((unused
)))
120 return GRUB_ERR_NONE
;
122 static inline grub_err_t
123 grub_machine_mmap_unregister (int handle
__attribute__ ((unused
)))
125 return GRUB_ERR_NONE
;
131 #endif /* ! GRUB_MEMORY_MACHINE_HEADER */