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Enable the 0-31 temporary IDT entries prior to activate the LongMode. If not enable...
[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ia32 / DxeLoadFunc.c
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95276127 1/*++\r
2\r
3Copyright (c) 2006, Intel Corporation\r
4All rights reserved. This program and the accompanying materials\r
5are licensed and made available under the terms and conditions of the BSD License\r
6which accompanies this distribution. The full text of the license may be found at\r
7http://opensource.org/licenses/bsd-license.php\r
8\r
9THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
10WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
11\r
12Module Name:\r
13\r
14 DxeLoadFunc.c\r
15\r
16Abstract:\r
17\r
18 Ia32-specifc functionality for DxeLoad.\r
19\r
20--*/\r
21\r
95276127 22#include "DxeIpl.h"\r
23#include "VirtualMemory.h"\r
24\r
25//\r
26// Global Descriptor Table (GDT)\r
27//\r
28GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT gGdtEntries [] = {\r
29/* selector { Global Segment Descriptor } */ \r
30/* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor \r
31/* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor\r
32/* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor\r
33/* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
34/* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor\r
35/* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
36/* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor\r
37/* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor\r
38/* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor\r
39};\r
40\r
41//\r
42// IA32 Gdt register\r
43//\r
44GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {\r
45 sizeof (gGdtEntries) - 1,\r
46 (UINTN) gGdtEntries\r
47 };\r
48\r
5d582956 49GLOBAL_REMOVE_IF_UNREFERENCED IA32_DESCRIPTOR gLidtDescriptor = {\r
50 sizeof (X64_IDT_GATE_DESCRIPTOR) * 32 - 1,\r
51 0\r
52};\r
53\r
95276127 54VOID\r
55HandOffToDxeCore (\r
56 IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,\r
57 IN EFI_PEI_HOB_POINTERS HobList,\r
58 IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal\r
59 )\r
60{\r
61 EFI_STATUS Status;\r
62 EFI_PHYSICAL_ADDRESS BaseOfStack;\r
63 EFI_PHYSICAL_ADDRESS TopOfStack;\r
64 UINTN PageTables;\r
5d582956 65 X64_IDT_GATE_DESCRIPTOR *IdtTable;\r
66 UINTN SizeOfTemplate;\r
67 VOID *TemplateBase;\r
68 EFI_PHYSICAL_ADDRESS VectorAddress;\r
69 UINT32 Index;\r
95276127 70\r
71 Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);\r
72 ASSERT_EFI_ERROR (Status);\r
73 \r
74 if (FeaturePcdGet(PcdDxeIplSwitchToLongMode)) {\r
75 //\r
76 // Compute the top of the stack we were allocated, which is used to load X64 dxe core. \r
77 // Pre-allocate a 32 bytes which confroms to x64 calling convention.\r
78 //\r
79 // The first four parameters to a function are passed in rcx, rdx, r8 and r9. \r
80 // Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the \r
81 // register parameters is reserved on the stack, in case the called function \r
82 // wants to spill them; this is important if the function is variadic. \r
83 //\r
84 TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;\r
85\r
86 //\r
87 // X64 Calling Conventions requires that the stack must be aligned to 16 bytes\r
88 //\r
89 TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);\r
90\r
91 //\r
92 // Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA\r
93 // memory, it may be corrupted when copying FV to high-end memory \r
94 //\r
95 AsmWriteGdtr (&gGdt);\r
96 //\r
97 // Create page table and save PageMapLevel4 to CR3\r
98 //\r
99 PageTables = CreateIdentityMappingPageTables ();\r
100\r
101 //\r
102 // End of PEI phase singal\r
103 //\r
104 Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
105 ASSERT_EFI_ERROR (Status);\r
106 \r
107 AsmWriteCr3 (PageTables);\r
5d582956 108\r
109\r
110 if (FeaturePcdGet (PcdDxeIplEnableIdt)) {\r
111 SizeOfTemplate = AsmGetVectorTemplatInfo (&TemplateBase);\r
112 \r
113 Status = PeiServicesAllocatePages (\r
114 EfiBootServicesData, \r
115 EFI_SIZE_TO_PAGES((SizeOfTemplate + sizeof (X64_IDT_GATE_DESCRIPTOR)) * 32), \r
116 &VectorAddress\r
117 );\r
118 \r
119 ASSERT_EFI_ERROR (Status);\r
120 \r
121 IdtTable = (X64_IDT_GATE_DESCRIPTOR *) (UINTN) (VectorAddress + SizeOfTemplate * 32);\r
122 for (Index = 0; Index < 32; Index++) {\r
123 IdtTable[Index].Ia32IdtEntry.Bits.GateType = 0x8e;\r
124 IdtTable[Index].Ia32IdtEntry.Bits.Reserved_0 = 0;\r
125 IdtTable[Index].Ia32IdtEntry.Bits.Selector = SYS_CODE64_SEL;\r
126 \r
127 IdtTable[Index].Ia32IdtEntry.Bits.OffsetLow = (UINT16) VectorAddress;\r
128 IdtTable[Index].Ia32IdtEntry.Bits.OffsetHigh = (UINT16) (VectorAddress >> 16);\r
129 IdtTable[Index].Offset32To63 = (UINT32) (VectorAddress >> 32);\r
130 IdtTable[Index].Reserved = 0;\r
131 \r
132 CopyMem ((VOID *) (UINTN) VectorAddress, TemplateBase, SizeOfTemplate);\r
133 AsmVectorFixup ((VOID *) (UINTN) VectorAddress, (UINT8) Index);\r
134 \r
135 VectorAddress += SizeOfTemplate;\r
136 }\r
137 \r
138 gLidtDescriptor.Base = (UINTN) IdtTable;\r
139 AsmWriteIdtr (&gLidtDescriptor);\r
140 }\r
141 //\r
95276127 142 // Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.\r
143 // Call x64 drivers passing in single argument, a pointer to the HOBs.\r
144 // \r
145 AsmEnablePaging64 (\r
146 SYS_CODE64_SEL,\r
147 DxeCoreEntryPoint,\r
148 (EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),\r
149 0,\r
150 TopOfStack\r
151 );\r
152 } else {\r
153 //\r
154 // Compute the top of the stack we were allocated. Pre-allocate a UINTN\r
155 // for safety.\r
156 //\r
157 TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;\r
158 TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);\r
159\r
160 //\r
161 // End of PEI phase singal\r
162 //\r
163 Status = PeiServicesInstallPpi (EndOfPeiSignal);\r
164 ASSERT_EFI_ERROR (Status);\r
165\r
166 SwitchStack (\r
167 (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,\r
168 HobList.Raw,\r
169 NULL,\r
170 (VOID *) (UINTN) TopOfStack\r
171 );\r
172 } \r
173}\r
174\r