MdeModulePkg/Core/Pei/Memory/MemoryServices.c

   1 /** @file
   2   EFI PEI Core memory services
   3
   4 Copyright (c) 2006 - 2014, 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 #include "PeiMain.h"
  16
  17 /**
  18
  19   Initialize the memory services.
  20
  21   @param PrivateData     Points to PeiCore's private instance data.
  22   @param SecCoreData     Points to a data structure containing information about the PEI core's operating
  23                          environment, such as the size and location of temporary RAM, the stack location and
  24                          the BFV location.
  25   @param OldCoreData     Pointer to the PEI Core data.
  26                          NULL if being run in non-permament memory mode.
  27
  28 **/
  29 VOID
  30 InitializeMemoryServices (
  31   IN PEI_CORE_INSTANCE           *PrivateData,
  32   IN CONST EFI_SEC_PEI_HAND_OFF  *SecCoreData,
  33   IN PEI_CORE_INSTANCE           *OldCoreData
  34   )
  35 {
  36
  37   PrivateData->SwitchStackSignal    = FALSE;
  38
  39   //
  40   // First entering PeiCore, following code will initialized some field
  41   // in PeiCore's private data according to hand off data from sec core.
  42   //
  43   if (OldCoreData == NULL) {
  44
  45     PrivateData->PeiMemoryInstalled = FALSE;
  46     PrivateData->HobList.Raw        = SecCoreData->PeiTemporaryRamBase;
  47
  48     PeiCoreBuildHobHandoffInfoTable (
  49       BOOT_WITH_FULL_CONFIGURATION,
  50       (EFI_PHYSICAL_ADDRESS) (UINTN) SecCoreData->PeiTemporaryRamBase,
  51       (UINTN) SecCoreData->PeiTemporaryRamSize
  52       );
  53
  54     //
  55     // Set Ps to point to ServiceTableShadow in Cache
  56     //
  57     PrivateData->Ps = &(PrivateData->ServiceTableShadow);
  58   }
  59
  60   return;
  61 }
  62
  63 /**
  64
  65   This function registers the found memory configuration with the PEI Foundation.
  66
  67   The usage model is that the PEIM that discovers the permanent memory shall invoke this service.
  68   This routine will hold discoveried memory information into PeiCore's private data,
  69   and set SwitchStackSignal flag. After PEIM who discovery memory is dispatched,
  70   PeiDispatcher will migrate temporary memory to permenement memory.
  71
  72   @param PeiServices        An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
  73   @param MemoryBegin        Start of memory address.
  74   @param MemoryLength       Length of memory.
  75
  76   @return EFI_SUCCESS Always success.
  77
  78 **/
  79 EFI_STATUS
  80 EFIAPI
  81 PeiInstallPeiMemory (
  82   IN CONST EFI_PEI_SERVICES  **PeiServices,
  83   IN EFI_PHYSICAL_ADDRESS    MemoryBegin,
  84   IN UINT64                  MemoryLength
  85   )
  86 {
  87   PEI_CORE_INSTANCE                     *PrivateData;
  88
  89   DEBUG ((EFI_D_INFO, "PeiInstallPeiMemory MemoryBegin 0x%LX, MemoryLength 0x%LX\n", MemoryBegin, MemoryLength));
  90   PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);
  91
  92   //
  93   // PEI_SERVICE.InstallPeiMemory should only be called one time during whole PEI phase.
  94   // If it is invoked more than one time, ASSERT information is given for developer debugging in debug tip and
  95   // simply return EFI_SUCESS in release tip to ignore it.
  96   //
  97   if (PrivateData->PeiMemoryInstalled) {
  98     DEBUG ((EFI_D_ERROR, "ERROR: PeiInstallPeiMemory is called more than once!\n"));
  99     ASSERT (PrivateData->PeiMemoryInstalled);
 100     return EFI_SUCCESS;
 101   }
 102
 103   PrivateData->PhysicalMemoryBegin   = MemoryBegin;
 104   PrivateData->PhysicalMemoryLength  = MemoryLength;
 105   PrivateData->FreePhysicalMemoryTop = MemoryBegin + MemoryLength;
 106
 107   PrivateData->SwitchStackSignal      = TRUE;
 108
 109   return EFI_SUCCESS;
 110 }
 111
 112 /**
 113   The purpose of the service is to publish an interface that allows
 114   PEIMs to allocate memory ranges that are managed by the PEI Foundation.
 115
 116   @param  PeiServices      An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
 117   @param  MemoryType       The type of memory to allocate.
 118   @param  Pages            The number of contiguous 4 KB pages to allocate.
 119   @param  Memory           Pointer to a physical address. On output, the address is set to the base
 120                            of the page range that was allocated.
 121
 122   @retval EFI_SUCCESS           The memory range was successfully allocated.
 123   @retval EFI_OUT_OF_RESOURCES  The pages could not be allocated.
 124   @retval EFI_INVALID_PARAMETER Type is not equal to EfiLoaderCode, EfiLoaderData, EfiRuntimeServicesCode,
 125                                 EfiRuntimeServicesData, EfiBootServicesCode, EfiBootServicesData,
 126                                 EfiACPIReclaimMemory, or EfiACPIMemoryNVS.
 127
 128 **/
 129 EFI_STATUS
 130 EFIAPI
 131 PeiAllocatePages (
 132   IN CONST EFI_PEI_SERVICES     **PeiServices,
 133   IN       EFI_MEMORY_TYPE      MemoryType,
 134   IN       UINTN                Pages,
 135   OUT      EFI_PHYSICAL_ADDRESS *Memory
 136   )
 137 {
 138   PEI_CORE_INSTANCE                       *PrivateData;
 139   EFI_PEI_HOB_POINTERS                    Hob;
 140   EFI_PHYSICAL_ADDRESS                    *FreeMemoryTop;
 141   EFI_PHYSICAL_ADDRESS                    *FreeMemoryBottom;
 142   UINTN                                   RemainingPages;
 143
 144   if ((MemoryType != EfiLoaderCode) &&
 145       (MemoryType != EfiLoaderData) &&
 146       (MemoryType != EfiRuntimeServicesCode) &&
 147       (MemoryType != EfiRuntimeServicesData) &&
 148       (MemoryType != EfiBootServicesCode) &&
 149       (MemoryType != EfiBootServicesData) &&
 150       (MemoryType != EfiACPIReclaimMemory) &&
 151       (MemoryType != EfiACPIMemoryNVS)) {
 152     return EFI_INVALID_PARAMETER;
 153   }
 154
 155   PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS (PeiServices);
 156   Hob.Raw     = PrivateData->HobList.Raw;
 157
 158   //
 159   // Check if Hob already available
 160   //
 161   if (!PrivateData->PeiMemoryInstalled) {
 162     //
 163     // When PeiInstallMemory is called but temporary memory has *not* been moved to temporary memory,
 164     // the AllocatePage will depend on the field of PEI_CORE_INSTANCE structure.
 165     //
 166     if (!PrivateData->SwitchStackSignal) {
 167       return EFI_NOT_AVAILABLE_YET;
 168     } else {
 169       FreeMemoryTop     = &(PrivateData->FreePhysicalMemoryTop);
 170       FreeMemoryBottom  = &(PrivateData->PhysicalMemoryBegin);
 171     }
 172   } else {
 173     FreeMemoryTop     = &(Hob.HandoffInformationTable->EfiFreeMemoryTop);
 174     FreeMemoryBottom  = &(Hob.HandoffInformationTable->EfiFreeMemoryBottom);
 175   }
 176
 177   //
 178   // Check to see if on 4k boundary, If not aligned, make the allocation aligned.
 179   //
 180   *(FreeMemoryTop) -= *(FreeMemoryTop) & 0xFFF;
 181
 182   //
 183   // Verify that there is sufficient memory to satisfy the allocation.
 184   // For page allocation, the overhead sizeof (EFI_HOB_MEMORY_ALLOCATION) needs to be considered.
 185   //
 186   if ((UINTN) (*FreeMemoryTop - *FreeMemoryBottom) < (UINTN) ALIGN_VALUE (sizeof (EFI_HOB_MEMORY_ALLOCATION), 8)) {
 187     DEBUG ((EFI_D_ERROR, "AllocatePages failed: No space to build memory allocation hob.\n"));
 188     return  EFI_OUT_OF_RESOURCES;
 189   }
 190   RemainingPages = (UINTN)(*FreeMemoryTop - *FreeMemoryBottom - ALIGN_VALUE (sizeof (EFI_HOB_MEMORY_ALLOCATION), 8)) >> EFI_PAGE_SHIFT;
 191   //
 192   // The number of remaining pages needs to be greater than or equal to that of the request pages.
 193   //
 194   if (RemainingPages < Pages) {
 195     DEBUG ((EFI_D_ERROR, "AllocatePages failed: No 0x%lx Pages is available.\n", (UINT64) Pages));
 196     DEBUG ((EFI_D_ERROR, "There is only left 0x%lx pages memory resource to be allocated.\n", (UINT64) RemainingPages));
 197     return  EFI_OUT_OF_RESOURCES;
 198   } else {
 199     //
 200     // Update the PHIT to reflect the memory usage
 201     //
 202     *(FreeMemoryTop) -= Pages * EFI_PAGE_SIZE;
 203
 204     //
 205     // Update the value for the caller
 206     //
 207     *Memory = *(FreeMemoryTop);
 208
 209     //
 210     // Create a memory allocation HOB.
 211     //
 212     BuildMemoryAllocationHob (
 213       *(FreeMemoryTop),
 214       Pages * EFI_PAGE_SIZE,
 215       MemoryType
 216       );
 217
 218     return EFI_SUCCESS;
 219   }
 220 }
 221
 222 /**
 223
 224   Pool allocation service. Before permenent memory is discoveried, the pool will
 225   be allocated the heap in the temporary memory. Genenrally, the size of heap in temporary
 226   memory does not exceed to 64K, so the biggest pool size could be allocated is
 227   64K.
 228
 229   @param PeiServices               An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
 230   @param Size                      Amount of memory required
 231   @param Buffer                    Address of pointer to the buffer
 232
 233   @retval EFI_SUCCESS              The allocation was successful
 234   @retval EFI_OUT_OF_RESOURCES     There is not enough heap to satisfy the requirement
 235                                    to allocate the requested size.
 236
 237 **/
 238 EFI_STATUS
 239 EFIAPI
 240 PeiAllocatePool (
 241   IN CONST EFI_PEI_SERVICES     **PeiServices,
 242   IN       UINTN                Size,
 243   OUT      VOID                 **Buffer
 244   )
 245 {
 246   EFI_STATUS               Status;
 247   EFI_HOB_MEMORY_POOL      *Hob;
 248
 249   //
 250   // If some "post-memory" PEIM wishes to allocate larger pool,
 251   // it should use AllocatePages service instead.
 252   //
 253
 254   //
 255   // Generally, the size of heap in temporary memory does not exceed to 64K,
 256   // HobLength is multiples of 8 bytes, so the maxmium size of pool is 0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL)
 257   //
 258   if (Size > (0xFFF8 - sizeof (EFI_HOB_MEMORY_POOL))) {
 259     return EFI_OUT_OF_RESOURCES;
 260   }
 261
 262   Status = PeiServicesCreateHob (
 263              EFI_HOB_TYPE_MEMORY_POOL,
 264              (UINT16)(sizeof (EFI_HOB_MEMORY_POOL) + Size),
 265              (VOID **)&Hob
 266              );
 267   ASSERT_EFI_ERROR (Status);
 268   *Buffer = Hob+1;
 269
 270   return Status;
 271 }