Enable Nt32 platform boot to DXE phase.
[mirror_edk2.git] / MdeModulePkg / Core / DxeIplPeim / Ia32 / 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 DxeLoadFunc.c
15
16 Abstract:
17
18 Ia32-specifc functionality for DxeLoad.
19
20 --*/
21
22 //
23 // Include common header file for this module.
24 //
25 #include "CommonHeader.h"
26
27 #include "DxeIpl.h"
28 #include "VirtualMemory.h"
29
30 //
31 // Global Descriptor Table (GDT)
32 //
33 GLOBAL_REMOVE_IF_UNREFERENCED IA32_GDT gGdtEntries [] = {
34 /* selector { Global Segment Descriptor } */
35 /* 0x00 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //null descriptor
36 /* 0x08 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear data segment descriptor
37 /* 0x10 */ {{0xffff, 0, 0, 0xf, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //linear code segment descriptor
38 /* 0x18 */ {{0xffff, 0, 0, 0x3, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
39 /* 0x20 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system code segment descriptor
40 /* 0x28 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
41 /* 0x30 */ {{0xffff, 0, 0, 0x2, 1, 0, 1, 0xf, 0, 0, 1, 1, 0}}, //system data segment descriptor
42 /* 0x38 */ {{0xffff, 0, 0, 0xa, 1, 0, 1, 0xf, 0, 1, 0, 1, 0}}, //system code segment descriptor
43 /* 0x40 */ {{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}}, //spare segment descriptor
44 };
45
46 //
47 // IA32 Gdt register
48 //
49 GLOBAL_REMOVE_IF_UNREFERENCED CONST IA32_DESCRIPTOR gGdt = {
50 sizeof (gGdtEntries) - 1,
51 (UINTN) gGdtEntries
52 };
53
54 VOID
55 HandOffToDxeCore (
56 IN EFI_PHYSICAL_ADDRESS DxeCoreEntryPoint,
57 IN EFI_PEI_HOB_POINTERS HobList,
58 IN EFI_PEI_PPI_DESCRIPTOR *EndOfPeiSignal
59 )
60 {
61 EFI_STATUS Status;
62 EFI_PHYSICAL_ADDRESS BaseOfStack;
63 EFI_PHYSICAL_ADDRESS TopOfStack;
64 UINTN PageTables;
65
66 Status = PeiServicesAllocatePages (EfiBootServicesData, EFI_SIZE_TO_PAGES (STACK_SIZE), &BaseOfStack);
67 ASSERT_EFI_ERROR (Status);
68
69 if (FeaturePcdGet(PcdDxeIplSwitchToLongMode)) {
70 //
71 // Compute the top of the stack we were allocated, which is used to load X64 dxe core.
72 // Pre-allocate a 32 bytes which confroms to x64 calling convention.
73 //
74 // The first four parameters to a function are passed in rcx, rdx, r8 and r9.
75 // Any further parameters are pushed on the stack. Furthermore, space (4 * 8bytes) for the
76 // register parameters is reserved on the stack, in case the called function
77 // wants to spill them; this is important if the function is variadic.
78 //
79 TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - 32;
80
81 //
82 // X64 Calling Conventions requires that the stack must be aligned to 16 bytes
83 //
84 TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, 16);
85
86 //
87 // Load the GDT of Go64. Since the GDT of 32-bit Tiano locates in the BS_DATA
88 // memory, it may be corrupted when copying FV to high-end memory
89 //
90 AsmWriteGdtr (&gGdt);
91 //
92 // Create page table and save PageMapLevel4 to CR3
93 //
94 PageTables = CreateIdentityMappingPageTables ();
95
96 //
97 // End of PEI phase singal
98 //
99 Status = PeiServicesInstallPpi (EndOfPeiSignal);
100 ASSERT_EFI_ERROR (Status);
101
102 AsmWriteCr3 (PageTables);
103 //
104 // Go to Long Mode. Interrupts will not get turned on until the CPU AP is loaded.
105 // Call x64 drivers passing in single argument, a pointer to the HOBs.
106 //
107 AsmEnablePaging64 (
108 SYS_CODE64_SEL,
109 DxeCoreEntryPoint,
110 (EFI_PHYSICAL_ADDRESS)(UINTN)(HobList.Raw),
111 0,
112 TopOfStack
113 );
114 } else {
115 //
116 // Compute the top of the stack we were allocated. Pre-allocate a UINTN
117 // for safety.
118 //
119 TopOfStack = BaseOfStack + EFI_SIZE_TO_PAGES (STACK_SIZE) * EFI_PAGE_SIZE - CPU_STACK_ALIGNMENT;
120 TopOfStack = (EFI_PHYSICAL_ADDRESS) (UINTN) ALIGN_POINTER (TopOfStack, CPU_STACK_ALIGNMENT);
121
122 //
123 // End of PEI phase singal
124 //
125 Status = PeiServicesInstallPpi (EndOfPeiSignal);
126 ASSERT_EFI_ERROR (Status);
127
128 SwitchStack (
129 (SWITCH_STACK_ENTRY_POINT)(UINTN)DxeCoreEntryPoint,
130 HobList.Raw,
131 NULL,
132 (VOID *) (UINTN) TopOfStack
133 );
134 }
135 }
136