include/grub/i386/pc/memory.h

   1 /* memory.h - describe the memory map */
   2 /*
   3  *  GRUB  --  GRand Unified Bootloader
   4  *  Copyright (C) 2002,2007,2008  Free Software Foundation, Inc.
   5  *
   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.
  10  *
  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.
  15  *
  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/>.
  18  */
  19
  20 #ifndef GRUB_MEMORY_MACHINE_HEADER
  21 #define GRUB_MEMORY_MACHINE_HEADER      1
  22
  23 #include <grub/symbol.h>
  24 #include <grub/machine/machine.h>
  25 #ifndef ASM_FILE
  26 #include <grub/types.h>
  27 #include <grub/err.h>
  28 #endif
  29
  30 /* The scratch buffer used in real mode code.  */
  31 #define GRUB_MEMORY_MACHINE_SCRATCH_ADDR        0x68000
  32 #define GRUB_MEMORY_MACHINE_SCRATCH_SEG (GRUB_MEMORY_MACHINE_SCRATCH_ADDR >> 4)
  33 #define GRUB_MEMORY_MACHINE_SCRATCH_SIZE        0x10000
  34
  35 /* The real mode stack.  */
  36 #define GRUB_MEMORY_MACHINE_REAL_STACK  (0x2000 - 0x10)
  37
  38 /* The size of the protect mode stack.  */
  39 #define GRUB_MEMORY_MACHINE_PROT_STACK_SIZE     0x8000
  40
  41 /* The upper memory area (starting at 640 kiB).  */
  42 #define GRUB_MEMORY_MACHINE_UPPER               0xa0000
  43
  44 /* The protected mode stack.  */
  45 #define GRUB_MEMORY_MACHINE_PROT_STACK  \
  46         (GRUB_MEMORY_MACHINE_SCRATCH_ADDR + GRUB_MEMORY_MACHINE_SCRATCH_SIZE \
  47          + GRUB_MEMORY_MACHINE_PROT_STACK_SIZE - 0x10)
  48
  49 /* The memory area where GRUB uses its own purpose. This part is not added
  50    into free memory for dynamic allocations.  */
  51 #define GRUB_MEMORY_MACHINE_RESERVED_START      \
  52         GRUB_MEMORY_MACHINE_SCRATCH_ADDR
  53 #define GRUB_MEMORY_MACHINE_RESERVED_END        \
  54         (GRUB_MEMORY_MACHINE_PROT_STACK + 0x10)
  55
  56 /* The area where GRUB is decompressed at early startup.  */
  57 #define GRUB_MEMORY_MACHINE_DECOMPRESSION_ADDR  0x100000
  58
  59 /* The address of a partition table passed to another boot loader.  */
  60 #define GRUB_MEMORY_MACHINE_PART_TABLE_ADDR     0x7be
  61
  62 /* The address where another boot loader is loaded.  */
  63 #define GRUB_MEMORY_MACHINE_BOOT_LOADER_ADDR    0x7c00
  64
  65 /* The flag for protected mode.  */
  66 #define GRUB_MEMORY_MACHINE_CR0_PE_ON           0x1
  67
  68 /* The code segment of the protected mode.  */
  69 #define GRUB_MEMORY_MACHINE_PROT_MODE_CSEG      0x8
  70
  71 /* The data segment of the protected mode.  */
  72 #define GRUB_MEMORY_MACHINE_PROT_MODE_DSEG      0x10
  73
  74 /* The code segment of the pseudo real mode.  */
  75 #define GRUB_MEMORY_MACHINE_PSEUDO_REAL_CSEG    0x18
  76
  77 /* The data segment of the pseudo real mode.  */
  78 #define GRUB_MEMORY_MACHINE_PSEUDO_REAL_DSEG    0x20
  79
  80 #ifndef ASM_FILE
  81
  82 #ifndef GRUB_MACHINE_IEEE1275
  83 extern grub_size_t EXPORT_VAR(grub_lower_mem);
  84 #endif
  85
  86 extern grub_size_t EXPORT_VAR(grub_upper_mem);
  87
  88 struct grub_machine_mmap_entry
  89 {
  90   grub_uint32_t size;
  91   grub_uint64_t addr;
  92   grub_uint64_t len;
  93 #define GRUB_MACHINE_MEMORY_AVAILABLE   1
  94 #define GRUB_MACHINE_MEMORY_RESERVED    2
  95   grub_uint32_t type;
  96 } __attribute__((packed));
  97
  98 grub_err_t EXPORT_FUNC(grub_machine_mmap_iterate)
  99      (int NESTED_FUNC_ATTR (*hook) (grub_uint64_t, grub_uint64_t, grub_uint32_t));
 100
 101 #endif
 102
 103 #endif /* ! GRUB_MEMORY_MACHINE_HEADER */