1 /** @file
2 Ipf-specific functionality for DxeLoad.
3
4 Copyright (c) 2006 - 2008, 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 "DxeIpl.h"
16
17
18
19 /**
20 Transfers control to DxeCore.
21
22 This function performs a CPU architecture specific operations to execute
23 the entry point of DxeCore with the parameters of HobList.
24 It also installs EFI_END_OF_PEI_PPI to signal the end of PEI phase.
25
26 @param DxeCoreEntryPoint The entry point of DxeCore.
27 @param HobList The start of HobList passed to DxeCore.
28
29 **/
30 VOID
HandOffToDxeCore(IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,IN EFI_PEI_HOB_POINTERS HobList)31 HandOffToDxeCore (
32 IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
33 IN EFI_PEI_HOB_POINTERS HobList
34 )
35 {
36 VOID *BaseOfStack;
37 VOID *TopOfStack;
38 VOID *BspStore;
39 EFI_STATUS Status;
40
41 //
42 // Allocate 128KB for the Stack
43 //
44 BaseOfStack = AllocatePages (EFI_SIZE_TO_PAGES (STACK_SIZE));
45 ASSERT (BaseOfStack != NULL);
46
47 //
48 // Allocate 16KB for the BspStore
49 //
50 BspStore = AllocatePages (EFI_SIZE_TO_PAGES (BSP_STORE_SIZE));
51 ASSERT (BspStore != NULL);
52 //
53 // Build BspStoreHob
54 //
55 BuildBspStoreHob ((EFI_PHYSICAL_ADDRESS) (UINTN) BspStore, BSP_STORE_SIZE, EfiBootServicesData);
56
57 //
58 // Compute the top of the stack we were allocated. Pre-allocate a UINTN
59 // for safety.
60 //
61 TopOfStack = (VOID *) ((UINTN) BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT);
62 TopOfStack = ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
63
64 //
65 // End of PEI phase signal
66 //
67 Status = PeiServicesInstallPpi (&gEndOfPeiSignalPpi);
68 ASSERT_EFI_ERROR (Status);
69
70 //
71 // Update the contents of BSP stack HOB to reflect the real stack info passed to DxeCore.
72 //
73 UpdateStackHob ((EFI_PHYSICAL_ADDRESS)(UINTN) BaseOfStack, STACK_SIZE);
74
75 //
76 // Transfer the control to the entry point of DxeCore.
77 //
78 SwitchStack (
79 (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
80 HobList.Raw,
81 NULL,
82 TopOfStack,
83 BspStore
84 );
85 }
86