EdkModulePkg/Core/DxeIplPeim/Ipf/DxeLoadFunc.c

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   IpfDxeLoad.c
  15
  16 Abstract:
  17
  18   Ipf-specifc functionality for DxeLoad.
  19
  20 --*/
  21
  22 #include <DxeIpl.h>
  23
  24 EFI_STATUS
  25 CreateArchSpecificHobs (
  26   OUT EFI_PHYSICAL_ADDRESS      *BspStore
  27   )
  28 /*++
  29
  30 Routine Description:
  31
  32   Creates architecture-specific HOBs.
  33
  34   Note: New parameters should NOT be added for any HOBs that are added to this
  35         function.  BspStore is a special case because it is required for the
  36         call to SwitchStacks() in DxeLoad().
  37
  38 Arguments:
  39
  40   BspStore    - The address of the BSP Store for those architectures that need
  41                 it.  Otherwise 0.
  42
  43 Returns:
  44
  45   EFI_SUCCESS   - The HOBs were created successfully.
  46
  47 --*/
  48 {
  49   EFI_STATUS  Status;
  50
  51   Status = EFI_SUCCESS;
  52
  53   ASSERT (NULL != BspStore);
  54
  55   //
  56   // Allocate 16KB for the BspStore
  57   //
  58   Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (BSP_STORE_SIZE), BspStore);
  59   if (EFI_ERROR (Status)) {
  60     return Status;
  61   }
  62
  63   BuildBspStoreHob (
  64     *BspStore,
  65     BSP_STORE_SIZE,
  66     EfiBootServicesData
  67     );
  68
  69   return EFI_SUCCESS;
  70 }
  71
  72 /**
  73   Transfers control to a function starting with a new stack.
  74
  75   Transfers control to the function specified by EntryPoint using the new stack
  76   specified by NewStack and passing in the parameters specified by Context1 and
  77   Context2. Context1 and Context2 are optional and may be NULL. The function
  78   EntryPoint must never return.
  79
  80   If EntryPoint is NULL, then ASSERT().
  81   If NewStack is NULL, then ASSERT().
  82
  83   @param  EntryPoint  A pointer to function to call with the new stack.
  84   @param  Context1    A pointer to the context to pass into the EntryPoint
  85                       function.
  86   @param  Context2    A pointer to the context to pass into the EntryPoint
  87                       function.
  88   @param  NewStack    A pointer to the new stack to use for the EntryPoint
  89                       function.
  90   @param  NewBsp      A pointer to the new BSP for the EntryPoint on IPF. It's
  91                       Reserved on other architectures.
  92
  93 **/
  94 VOID
  95 EFIAPI
  96 SwitchIplStacks (
  97   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,
  98   IN      VOID                      *Context1,  OPTIONAL
  99   IN      VOID                      *Context2,  OPTIONAL
 100   IN      VOID                      *NewStack,
 101   IN      VOID                      *NewBsp
 102   )
 103 {
 104   AsmSwitchStackAndBackingStore (
 105     EntryPoint,
 106     Context1,
 107     Context2,
 108     NewStack,
 109     NewBsp
 110     );
 111 }