+++ /dev/null
-;------------------------------------------------------------------------------ ;\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
-; MpFuncs.nasm\r
-;\r
-; Abstract:\r
-;\r
-; This is the assembly code for MP support\r
-;\r
-;-------------------------------------------------------------------------------\r
-\r
-%include "MpEqu.inc"\r
-extern ASM_PFX(InitializeFloatingPointUnits)\r
-\r
-SECTION .text\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
-global ASM_PFX(RendezvousFunnelProc)\r
-ASM_PFX(RendezvousFunnelProc):\r
-RendezvousFunnelProcStart:\r
-; At this point CS = 0x(vv00) and ip= 0x0.\r
-BITS 16\r
- mov ebp, eax ; save BIST information\r
-\r
- mov ax, cs\r
- mov ds, ax\r
- mov es, ax\r
- mov ss, ax\r
- xor ax, ax\r
- mov fs, ax\r
- mov gs, ax\r
-\r
- mov si, BufferStartLocation\r
- mov ebx, [si]\r
-\r
- mov si, ModeOffsetLocation\r
- mov eax, [si]\r
- mov si, CodeSegmentLocation\r
- mov edx, [si]\r
- mov di, ax\r
- sub di, 02h\r
- mov [di], dx\r
- sub di, 04h\r
- add eax, ebx\r
- mov [di],eax\r
-\r
- mov si, DataSegmentLocation\r
- mov edx, [si]\r
-\r
- mov si, GdtrLocation\r
-o32 lgdt [cs:si]\r
-\r
- mov si, IdtrLocation\r
-o32 lidt [cs:si]\r
-\r
- xor ax, ax\r
- mov ds, ax\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
- jmp 0:strict dword 0 ; far jump to protected mode\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
- mov esi, ebx\r
- mov edi, esi\r
- add edi, LockLocation\r
- mov eax, NotVacantFlag\r
-\r
-TestLock:\r
- xchg [edi], eax\r
- cmp eax, NotVacantFlag\r
- jz TestLock\r
-\r
- mov edi, esi\r
- add edi, NumApsExecutingLoction\r
- inc dword [edi]\r
- mov ebx, [edi]\r
-\r
-ProgramStack:\r
- mov edi, esi\r
- add edi, StackSizeLocation\r
- mov eax, [edi]\r
- mov edi, esi\r
- add edi, StackStartAddressLocation\r
- add eax, [edi]\r
- mov esp, eax\r
- mov [edi], eax\r
-\r
-Releaselock:\r
- mov eax, VacantFlag\r
- mov edi, esi\r
- add edi, LockLocation\r
- xchg [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, ASM_PFX(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, [edi]\r
-\r
- call eax ; invoke C function\r
-\r
- jmp $ ; never reach here\r
-RendezvousFunnelProcEnd:\r
-\r
-;-------------------------------------------------------------------------------------\r
-; AsmGetAddressMap (&AddressMap);\r
-;-------------------------------------------------------------------------------------\r
-global ASM_PFX(AsmGetAddressMap)\r
-ASM_PFX(AsmGetAddressMap):\r
- pushad\r
- mov ebp,esp\r
-\r
- mov ebx, [ebp + 24h]\r
- mov dword [ebx], RendezvousFunnelProcStart\r
- mov dword [ebx + 4h], Flat32Start - RendezvousFunnelProcStart\r
- mov dword [ebx + 8h], RendezvousFunnelProcEnd - RendezvousFunnelProcStart\r
-\r
- popad\r
- ret\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
-global ASM_PFX(AsmExchangeRole)\r
-ASM_PFX(AsmExchangeRole):\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, [ebp + 24h]\r
-\r
- ; edi contains OthersInfo pointer\r
- mov edi, [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 [esi + 8]\r
- sidt [esi + 14]\r
-\r
- ; Store the its StackPointer\r
- mov [esi + 4],esp\r
-\r
- ; update its switch state to STORED\r
- mov byte [esi], CPU_SWITCH_STATE_STORED\r
-\r
-WaitForOtherStored:\r
- ; wait until the other CPU finish storing its state\r
- cmp byte [edi], CPU_SWITCH_STATE_STORED\r
- jz OtherStored\r
- pause\r
- jmp WaitForOtherStored\r
-\r
-OtherStored:\r
- ; Since another CPU already stored its state, load them\r
- ; load GDTR value\r
- lgdt [edi + 8]\r
-\r
- ; load IDTR value\r
- lidt [edi + 14]\r
-\r
- ; load its future StackPointer\r
- mov esp, [edi + 4]\r
-\r
- ; update the other CPU's switch state to LOADED\r
- mov byte [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 [esi], CPU_SWITCH_STATE_LOADED\r
- jz OtherLoaded\r
- pause\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
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