;------------------------------------------------------------------------------ ;\r
-; Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>\r
-; This program and the accompanying materials\r
-; are licensed and made available under the terms and conditions of the BSD License\r
-; which accompanies this distribution. The full text of the license may be found at\r
-; http://opensource.org/licenses/bsd-license.php.\r
-;\r
-; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
-; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+; Copyright (c) 2015 - 2018, Intel Corporation. All rights reserved.<BR>\r
+; SPDX-License-Identifier: BSD-2-Clause-Patent\r
;\r
; Module Name:\r
;\r
mov si, BufferStartLocation\r
mov ebx, [si]\r
\r
- mov di, ModeOffsetLocation\r
- mov eax, [di]\r
- mov di, CodeSegmentLocation\r
- mov edx, [di]\r
- mov di, ax\r
- sub di, 02h\r
- mov [di],dx ; Patch long mode CS\r
- sub di, 04h\r
- add eax, ebx\r
- mov [di],eax ; Patch address\r
+ mov si, DataSegmentLocation\r
+ mov edx, [si]\r
+\r
+ ;\r
+ ; Get start address of 32-bit code in low memory (<1MB)\r
+ ;\r
+ mov edi, ModeTransitionMemoryLocation\r
\r
mov si, GdtrLocation\r
o32 lgdt [cs:si]\r
mov si, IdtrLocation\r
o32 lidt [cs:si]\r
\r
- mov si, EnableExecuteDisableLocation\r
- cmp byte [si], 0\r
- jz SkipEnableExecuteDisableBit\r
+ ;\r
+ ; Switch to protected mode\r
+ ;\r
+ mov eax, cr0 ; Get control register 0\r
+ or eax, 000000003h ; Set PE bit (bit #0) & MP\r
+ mov cr0, eax\r
+\r
+ ; Switch to 32-bit code (>1MB)\r
+o32 jmp far [cs:di]\r
+\r
+;\r
+; Following code must be copied to memory with type of EfiBootServicesCode.\r
+; This is required if NX is enabled for EfiBootServicesCode of memory.\r
+;\r
+BITS 32\r
+Flat32Start: ; protected mode entry point\r
+ mov ds, dx\r
+ mov es, dx\r
+ mov fs, dx\r
+ mov gs, dx\r
+ mov ss, dx\r
\r
;\r
; Enable execute disable bit\r
;\r
+ mov esi, EnableExecuteDisableLocation\r
+ cmp byte [ebx + esi], 0\r
+ jz SkipEnableExecuteDisableBit\r
+\r
mov ecx, 0c0000080h ; EFER MSR number\r
rdmsr ; Read EFER\r
bts eax, 11 ; Enable Execute Disable Bit\r
wrmsr ; Write EFER\r
\r
SkipEnableExecuteDisableBit:\r
-\r
- mov di, DataSegmentLocation\r
- mov edi, [di] ; Save long mode DS in edi\r
-\r
- mov si, Cr3Location ; Save CR3 in ecx\r
- mov ecx, [si]\r
-\r
- xor ax, ax\r
- mov ds, ax ; Clear data segment\r
-\r
- mov eax, cr0 ; Get control register 0\r
- or eax, 000000003h ; Set PE bit (bit #0) & MP\r
- mov cr0, eax\r
-\r
+ ;\r
+ ; Enable PAE\r
+ ;\r
mov eax, cr4\r
bts eax, 5\r
mov cr4, eax\r
\r
+ ;\r
+ ; Load page table\r
+ ;\r
+ mov esi, Cr3Location ; Save CR3 in ecx\r
+ mov ecx, [ebx + esi]\r
mov cr3, ecx ; Load CR3\r
\r
+ ;\r
+ ; Enable long mode\r
+ ;\r
mov ecx, 0c0000080h ; EFER MSR number\r
rdmsr ; Read EFER\r
bts eax, 8 ; Set LME=1\r
wrmsr ; Write EFER\r
\r
+ ;\r
+ ; Enable paging\r
+ ;\r
mov eax, cr0 ; Read CR0\r
bts eax, 31 ; Set PG=1\r
mov cr0, eax ; Write CR0\r
\r
- jmp 0:strict dword 0 ; far jump to long mode\r
+ ;\r
+ ; Far jump to 64-bit code\r
+ ;\r
+ mov edi, ModeHighMemoryLocation\r
+ add edi, ebx\r
+ jmp far [edi]\r
+\r
BITS 64\r
LongModeStart:\r
- mov eax, edi\r
- mov ds, ax\r
- mov es, ax\r
- mov ss, ax\r
-\r
mov esi, ebx\r
lea edi, [esi + InitFlagLocation]\r
cmp qword [edi], 1 ; ApInitConfig\r
jnz GetApicId\r
\r
+ ; Increment the number of APs executing here as early as possible\r
+ ; This is decremented in C code when AP is finished executing\r
+ mov edi, esi\r
+ add edi, NumApsExecutingLocation\r
+ lock inc dword [edi]\r
+\r
; AP init\r
mov edi, esi\r
add edi, LockLocation\r
jz ProgramStack\r
add edi, 20\r
inc ebx\r
- jmp GetNextProcNumber \r
+ jmp GetNextProcNumber\r
\r
ProgramStack:\r
mov rsp, qword [edi + 12]\r
global ASM_PFX(AsmRelocateApLoop)\r
ASM_PFX(AsmRelocateApLoop):\r
AsmRelocateApLoopStart:\r
+ cli ; Disable interrupt before switching to 32-bit mode\r
mov rax, [rsp + 40] ; CountTofinish\r
lock dec dword [rax] ; (*CountTofinish)--\r
mov rsp, r9\r
jnz HltLoop\r
mov ebx, edx ; Save C-State to ebx\r
MwaitLoop:\r
+ cli\r
mov eax, esp ; Set Monitor Address\r
xor ecx, ecx ; ecx = 0\r
xor edx, edx ; edx = 0\r
lea rax, [ASM_PFX(AsmRelocateApLoop)]\r
mov qword [rcx + 18h], rax\r
mov qword [rcx + 20h], AsmRelocateApLoopEnd - AsmRelocateApLoopStart\r
+ mov qword [rcx + 28h], Flat32Start - RendezvousFunnelProcStart\r
ret\r
\r
;-------------------------------------------------------------------------------------\r
projects / mirror_edk2.git / blobdiff