MdeModulePkg/Core/Dxe/Mem/Imem.h

   1 /** @file
   2   Data structure and functions to allocate and free memory space.
   3
   4 Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
   5 This program and the accompanying materials
   6 are licensed and made available under the terms and conditions of the BSD License
   7 which accompanies this distribution.  The full text of the license may be found at
   8 http://opensource.org/licenses/bsd-license.php
   9
  10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12
  13 **/
  14
  15 #ifndef _IMEM_H_
  16 #define _IMEM_H_
  17
  18 //
  19 // +---------------------------------------------------+
  20 // | 0..(EfiMaxMemoryType - 1)    - Normal memory type |
  21 // +---------------------------------------------------+
  22 // | EfiMaxMemoryType..0x6FFFFFFF - Ilegal             |
  23 // +---------------------------------------------------+
  24 // | 0x70000000..0x7FFFFFFF       - OEM reserved       |
  25 // +---------------------------------------------------+
  26 // | 0x80000000..0xFFFFFFFF       - OS reserved        |
  27 // +---------------------------------------------------+
  28 //
  29 #define MEMORY_TYPE_OS_RESERVED_MIN                 0x80000000
  30 #define MEMORY_TYPE_OS_RESERVED_MAX                 0xFFFFFFFF
  31 #define MEMORY_TYPE_OEM_RESERVED_MIN                0x70000000
  32 #define MEMORY_TYPE_OEM_RESERVED_MAX                0x7FFFFFFF
  33
  34 //
  35 // MEMORY_MAP_ENTRY
  36 //
  37
  38 #define MEMORY_MAP_SIGNATURE   SIGNATURE_32('m','m','a','p')
  39 typedef struct {
  40   UINTN           Signature;
  41   LIST_ENTRY      Link;
  42   BOOLEAN         FromPages;
  43
  44   EFI_MEMORY_TYPE Type;
  45   UINT64          Start;
  46   UINT64          End;
  47
  48   UINT64          VirtualStart;
  49   UINT64          Attribute;
  50 } MEMORY_MAP;
  51
  52 //
  53 // Internal prototypes
  54 //
  55
  56
  57 /**
  58   Internal function.  Used by the pool functions to allocate pages
  59   to back pool allocation requests.
  60
  61   @param  PoolType               The type of memory for the new pool pages
  62   @param  NumberOfPages          No of pages to allocate
  63   @param  Alignment              Bits to align.
  64
  65   @return The allocated memory, or NULL
  66
  67 **/
  68 VOID *
  69 CoreAllocatePoolPages (
  70   IN EFI_MEMORY_TYPE    PoolType,
  71   IN UINTN              NumberOfPages,
  72   IN UINTN              Alignment
  73   );
  74
  75
  76
  77 /**
  78   Internal function.  Frees pool pages allocated via AllocatePoolPages ()
  79
  80   @param  Memory                 The base address to free
  81   @param  NumberOfPages          The number of pages to free
  82
  83 **/
  84 VOID
  85 CoreFreePoolPages (
  86   IN EFI_PHYSICAL_ADDRESS   Memory,
  87   IN UINTN                  NumberOfPages
  88   );
  89
  90
  91
  92 /**
  93   Internal function to allocate pool of a particular type.
  94   Caller must have the memory lock held
  95
  96   @param  PoolType               Type of pool to allocate
  97   @param  Size                   The amount of pool to allocate
  98
  99   @return The allocate pool, or NULL
 100
 101 **/
 102 VOID *
 103 CoreAllocatePoolI (
 104   IN EFI_MEMORY_TYPE  PoolType,
 105   IN UINTN            Size
 106   );
 107
 108
 109
 110 /**
 111   Internal function to free a pool entry.
 112   Caller must have the memory lock held
 113
 114   @param  Buffer                 The allocated pool entry to free
 115
 116   @retval EFI_INVALID_PARAMETER  Buffer not valid
 117   @retval EFI_SUCCESS            Buffer successfully freed.
 118
 119 **/
 120 EFI_STATUS
 121 CoreFreePoolI (
 122   IN VOID       *Buffer
 123   );
 124
 125
 126
 127 /**
 128   Enter critical section by gaining lock on gMemoryLock.
 129
 130 **/
 131 VOID
 132 CoreAcquireMemoryLock (
 133   VOID
 134   );
 135
 136
 137 /**
 138   Exit critical section by releasing lock on gMemoryLock.
 139
 140 **/
 141 VOID
 142 CoreReleaseMemoryLock (
 143   VOID
 144   );
 145
 146
 147 //
 148 // Internal Global data
 149 //
 150
 151 extern EFI_LOCK           gMemoryLock;
 152 extern LIST_ENTRY         gMemoryMap;
 153 extern LIST_ENTRY         mGcdMemorySpaceMap;
 154 #endif