-;------------------------------------------------------------------------------ ;
-; Copyright (c) 2015, Intel Corporation. All rights reserved.<BR>
-; This program and the accompanying materials
-; are licensed and made available under the terms and conditions of the BSD License
-; which accompanies this distribution. The full text of the license may be found at
-; http://opensource.org/licenses/bsd-license.php.
-;
-; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
-;
-; Module Name:
-;
-; MpFuncs32.asm
-;
-; Abstract:
-;
-; This is the assembly code for MP support
-;
-;-------------------------------------------------------------------------------
-
-.686p
-.model flat
-
-include MpEqu.inc
-InitializeFloatingPointUnits PROTO C
-
-.code
-
-;-------------------------------------------------------------------------------------
-;RendezvousFunnelProc procedure follows. All APs execute their procedure. This
-;procedure serializes all the AP processors through an Init sequence. It must be
-;noted that APs arrive here very raw...ie: real mode, no stack.
-;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC
-;IS IN MACHINE CODE.
-;-------------------------------------------------------------------------------------
-RendezvousFunnelProc PROC PUBLIC
-RendezvousFunnelProcStart::
-; At this point CS = 0x(vv00) and ip= 0x0.
-; Save BIST information to ebp firstly
- db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information
-
- db 8ch,0c8h ; mov ax,cs
- db 8eh,0d8h ; mov ds,ax
- db 8eh,0c0h ; mov es,ax
- db 8eh,0d0h ; mov ss,ax
- db 33h,0c0h ; xor ax,ax
- db 8eh,0e0h ; mov fs,ax
- db 8eh,0e8h ; mov gs,ax
-
- db 0BEh ; opcode of mov si, mem16
- dw BufferStartLocation ; mov si, BufferStartLocation
- db 66h, 8Bh, 1Ch ; mov ebx,dword ptr [si]
-
- db 0BFh ; opcode of mov di, mem16
- dw PmodeOffsetLocation ; mov di, PmodeOffsetLocation
- db 66h, 8Bh, 05h ; mov eax,dword ptr [di]
- db 8Bh, 0F8h ; mov di, ax
- db 83h, 0EFh,06h ; sub di, 06h
- db 66h, 03h, 0C3h ; add eax, ebx
- db 66h, 89h, 05h ; mov dword ptr [di],eax
-
- db 0BEh ; opcode of mov si, mem16
- dw GdtrLocation ; mov si, GdtrLocation
- db 66h ; db 66h
- db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]
-
- db 0BEh
- dw IdtrLocation ; mov si, IdtrLocation
- db 66h ; db 66h
- db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]
-
- db 33h, 0C0h ; xor ax, ax
- db 8Eh, 0D8h ; mov ds, ax
-
- db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0
- db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP
- db 0Fh, 22h, 0C0h ; mov cr0, eax
-
- db 66h, 67h, 0EAh ; far jump
- dd 0h ; 32-bit offset
- dw PROTECT_MODE_CS ; 16-bit selector
-
-Flat32Start:: ; protected mode entry point
- mov ax, PROTECT_MODE_DS
- mov ds, ax
- mov es, ax
- mov fs, ax
- mov gs, ax
- mov ss, ax
-
- mov esi, ebx
- mov edi, esi
- add edi, LockLocation
- mov eax, NotVacantFlag
-
-TestLock:
- xchg dword ptr [edi], eax
- cmp eax, NotVacantFlag
- jz TestLock
-
- mov edi, esi
- add edi, NumApsExecutingLoction
- inc dword ptr [edi]
- mov ebx, dword ptr [edi]
-
-ProgramStack:
- mov edi, esi
- add edi, StackSizeLocation
- mov eax, dword ptr [edi]
- mov edi, esi
- add edi, StackStartAddressLocation
- add eax, dword ptr [edi]
- mov esp, eax
- mov dword ptr [edi], eax
-
-Releaselock:
- mov eax, VacantFlag
- mov edi, esi
- add edi, LockLocation
- xchg dword ptr [edi], eax
-
-CProcedureInvoke:
- push ebp ; push BIST data at top of AP stack
- xor ebp, ebp ; clear ebp for call stack trace
- push ebp
- mov ebp, esp
-
- mov eax, InitializeFloatingPointUnits
- call eax ; Call assembly function to initialize FPU per UEFI spec
-
- push ebx ; Push NumApsExecuting
- mov eax, esi
- add eax, LockLocation
- push eax ; push address of exchange info data buffer
-
- mov edi, esi
- add edi, ApProcedureLocation
- mov eax, dword ptr [edi]
-
- call eax ; invoke C function
-
- jmp $ ; never reach here
-
-RendezvousFunnelProc ENDP
-RendezvousFunnelProcEnd::
-
-;-------------------------------------------------------------------------------------
-; AsmGetAddressMap (&AddressMap);
-;-------------------------------------------------------------------------------------
-AsmGetAddressMap PROC near C PUBLIC
- pushad
- mov ebp,esp
-
- mov ebx, dword ptr [ebp+24h]
- mov dword ptr [ebx], RendezvousFunnelProcStart
- mov dword ptr [ebx + 4h], Flat32Start - RendezvousFunnelProcStart
- mov dword ptr [ebx + 8h], 0
- mov dword ptr [ebx + 0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart
-
- popad
- ret
-AsmGetAddressMap ENDP
-
-AsmInitializeGdt PROC near C PUBLIC
- push ebp
- mov ebp, esp
- pushad
- mov edi, [ebp + 8] ; Load GDT register
-
- mov ax,cs ; Get the selector data from our code image
- mov es,ax
- lgdt FWORD PTR es:[edi] ; and update the GDTR
-
- push PROTECT_MODE_CS
- lea eax, SetCodeSelectorFarJump
- push eax
- retf
-SetCodeSelectorFarJump:
- mov ax, PROTECT_MODE_DS ; Update the Base for the new selectors, too
- mov ds, ax
- mov es, ax
- mov fs, ax
- mov gs, ax
- mov ss, ax
-
- popad
- pop ebp
- ret
-AsmInitializeGdt ENDP
-
-END
+;------------------------------------------------------------------------------ ;\r
+; Copyright (c) 2015 - 2016, 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
+;\r
+; Module Name:\r
+;\r
+; MpFuncs32.asm\r
+;\r
+; Abstract:\r
+;\r
+; This is the assembly code for MP support\r
+;\r
+;-------------------------------------------------------------------------------\r
+\r
+.686p\r
+.model flat\r
+\r
+include MpEqu.inc\r
+InitializeFloatingPointUnits PROTO C\r
+\r
+.code\r
+\r
+;-------------------------------------------------------------------------------------\r
+;RendezvousFunnelProc procedure follows. All APs execute their procedure. This\r
+;procedure serializes all the AP processors through an Init sequence. It must be\r
+;noted that APs arrive here very raw...ie: real mode, no stack.\r
+;ALSO THIS PROCEDURE IS EXECUTED BY APs ONLY ON 16 BIT MODE. HENCE THIS PROC\r
+;IS IN MACHINE CODE.\r
+;-------------------------------------------------------------------------------------\r
+RendezvousFunnelProc PROC PUBLIC\r
+RendezvousFunnelProcStart::\r
+; At this point CS = 0x(vv00) and ip= 0x0.\r
+; Save BIST information to ebp firstly\r
+ db 66h, 08bh, 0e8h ; mov ebp, eax ; save BIST information\r
+\r
+ db 8ch,0c8h ; mov ax, cs\r
+ db 8eh,0d8h ; mov ds, ax\r
+ db 8eh,0c0h ; mov es, ax\r
+ db 8eh,0d0h ; mov ss, ax\r
+ db 33h,0c0h ; xor ax, ax\r
+ db 8eh,0e0h ; mov fs, ax\r
+ db 8eh,0e8h ; mov gs, ax\r
+\r
+ db 0BEh ; opcode of mov si, mem16\r
+ dw BufferStartLocation ; mov si, BufferStartLocation\r
+ db 66h, 8Bh, 1Ch ; mov ebx, dword ptr [si]\r
+\r
+ db 0BEh ; opcode of mov si, mem16\r
+ dw PmodeOffsetLocation ; mov si, PmodeOffsetLocation\r
+ db 66h, 8Bh, 04h ; mov eax, [si]\r
+ db 0BEh ; opcode of mov si, mem16\r
+ dw CodeSegmentLocation ; mov si, CodeSegmentLocation\r
+ db 66h, 8Bh, 14h ; mov edx, [si]\r
+ db 89h, 0C7h ; mov di, ax\r
+ db 83h, 0EFh, 02h ; sub di, 02h\r
+ db 89h, 15h ; mov [di], dx\r
+ db 83h, 0EFh, 04h ; sub di, 04h\r
+ db 66h, 01h, 0D8h ; add eax, ebx\r
+ db 66h, 89h, 05h ; mov [di], eax\r
+\r
+ db 0BEh ; opcode of mov si, mem16\r
+ dw DataSegmentLocation ; mov si, DataSegmentLocation\r
+ db 66h, 8Bh, 14h ; mov edx, [si]\r
+\r
+ db 0BEh ; opcode of mov si, mem16\r
+ dw GdtrLocation ; mov si, GdtrLocation\r
+ db 66h ; db 66h\r
+ db 2Eh, 0Fh, 01h, 14h ; lgdt fword ptr cs:[si]\r
+\r
+ db 0BEh\r
+ dw IdtrLocation ; mov si, IdtrLocation\r
+ db 66h ; db 66h\r
+ db 2Eh,0Fh, 01h, 1Ch ; lidt fword ptr cs:[si]\r
+\r
+ db 33h, 0C0h ; xor ax, ax\r
+ db 8Eh, 0D8h ; mov ds, ax\r
+\r
+ db 0Fh, 20h, 0C0h ; mov eax, cr0 ;Get control register 0\r
+ db 66h, 83h, 0C8h, 03h ; or eax, 000000003h ;Set PE bit (bit #0) & MP\r
+ db 0Fh, 22h, 0C0h ; mov cr0, eax\r
+\r
+ db 66h, 67h, 0EAh ; far jump\r
+ dd 0h ; 32-bit offset\r
+ dw 0h ; 16-bit selector\r
+\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
+ mov esi, ebx\r
+ mov edi, esi\r
+ add edi, LockLocation\r
+ mov eax, NotVacantFlag\r
+\r
+TestLock:\r
+ xchg dword ptr [edi], eax\r
+ cmp eax, NotVacantFlag\r
+ jz TestLock\r
+\r
+ mov edi, esi\r
+ add edi, NumApsExecutingLoction\r
+ inc dword ptr [edi]\r
+ mov ebx, dword ptr [edi]\r
+\r
+ProgramStack:\r
+ mov edi, esi\r
+ add edi, StackSizeLocation\r
+ mov eax, dword ptr [edi]\r
+ mov edi, esi\r
+ add edi, StackStartAddressLocation\r
+ add eax, dword ptr [edi]\r
+ mov esp, eax\r
+ mov dword ptr [edi], eax\r
+\r
+Releaselock:\r
+ mov eax, VacantFlag\r
+ mov edi, esi\r
+ add edi, LockLocation\r
+ xchg dword ptr [edi], eax\r
+\r
+CProcedureInvoke:\r
+ push ebp ; push BIST data at top of AP stack\r
+ xor ebp, ebp ; clear ebp for call stack trace\r
+ push ebp\r
+ mov ebp, esp\r
+\r
+ mov eax, InitializeFloatingPointUnits\r
+ call eax ; Call assembly function to initialize FPU per UEFI spec\r
+\r
+ push ebx ; Push NumApsExecuting\r
+ mov eax, esi\r
+ add eax, LockLocation\r
+ push eax ; push address of exchange info data buffer\r
+\r
+ mov edi, esi\r
+ add edi, ApProcedureLocation\r
+ mov eax, dword ptr [edi]\r
+\r
+ call eax ; invoke C function\r
+\r
+ jmp $ ; never reach here\r
+\r
+RendezvousFunnelProc ENDP\r
+RendezvousFunnelProcEnd::\r
+\r
+;-------------------------------------------------------------------------------------\r
+; AsmGetAddressMap (&AddressMap);\r
+;-------------------------------------------------------------------------------------\r
+AsmGetAddressMap PROC near C PUBLIC\r
+ pushad\r
+ mov ebp,esp\r
+\r
+ mov ebx, dword ptr [ebp+24h]\r
+ mov dword ptr [ebx], RendezvousFunnelProcStart\r
+ mov dword ptr [ebx + 4h], Flat32Start - RendezvousFunnelProcStart\r
+ mov dword ptr [ebx + 8h], 0\r
+ mov dword ptr [ebx + 0ch], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r
+\r
+ popad\r
+ ret\r
+AsmGetAddressMap ENDP\r
+\r
+PAUSE32 MACRO\r
+ DB 0F3h\r
+ DB 090h\r
+ ENDM\r
+\r
+;-------------------------------------------------------------------------------------\r
+;AsmExchangeRole procedure follows. This procedure executed by current BSP, that is\r
+;about to become an AP. It switches it'stack with the current AP.\r
+;AsmExchangeRole (IN CPU_EXCHANGE_INFO *MyInfo, IN CPU_EXCHANGE_INFO *OthersInfo);\r
+;-------------------------------------------------------------------------------------\r
+AsmExchangeRole PROC near C PUBLIC\r
+ ; DO NOT call other functions in this function, since 2 CPU may use 1 stack\r
+ ; at the same time. If 1 CPU try to call a function, stack will be corrupted.\r
+ pushad\r
+ mov ebp,esp\r
+\r
+ ; esi contains MyInfo pointer\r
+ mov esi, dword ptr [ebp+24h]\r
+\r
+ ; edi contains OthersInfo pointer\r
+ mov edi, dword ptr [ebp+28h]\r
+\r
+ ;Store EFLAGS, GDTR and IDTR register to stack\r
+ pushfd\r
+ mov eax, cr4\r
+ push eax ; push cr4 firstly\r
+ mov eax, cr0\r
+ push eax\r
+\r
+ sgdt fword ptr [esi+8]\r
+ sidt fword ptr [esi+14]\r
+\r
+ ; Store the its StackPointer\r
+ mov dword ptr [esi+4],esp\r
+\r
+ ; update its switch state to STORED\r
+ mov byte ptr [esi], CPU_SWITCH_STATE_STORED\r
+\r
+WaitForOtherStored:\r
+ ; wait until the other CPU finish storing its state\r
+ cmp byte ptr [edi], CPU_SWITCH_STATE_STORED\r
+ jz OtherStored\r
+ PAUSE32\r
+ jmp WaitForOtherStored\r
+\r
+OtherStored:\r
+ ; Since another CPU already stored its state, load them\r
+ ; load GDTR value\r
+ lgdt fword ptr [edi+8]\r
+\r
+ ; load IDTR value\r
+ lidt fword ptr [edi+14]\r
+\r
+ ; load its future StackPointer\r
+ mov esp, dword ptr [edi+4]\r
+\r
+ ; update the other CPU's switch state to LOADED\r
+ mov byte ptr [edi], CPU_SWITCH_STATE_LOADED\r
+\r
+WaitForOtherLoaded:\r
+ ; wait until the other CPU finish loading new state,\r
+ ; otherwise the data in stack may corrupt\r
+ cmp byte ptr [esi], CPU_SWITCH_STATE_LOADED\r
+ jz OtherLoaded\r
+ PAUSE32\r
+ jmp WaitForOtherLoaded\r
+\r
+OtherLoaded:\r
+ ; since the other CPU already get the data it want, leave this procedure\r
+ pop eax\r
+ mov cr0, eax\r
+ pop eax\r
+ mov cr4, eax\r
+ popfd\r
+\r
+ popad\r
+ ret\r
+AsmExchangeRole ENDP\r
+\r
+END\r
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