Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Jeff Fan <jeff....@intel.com> CC: Feng Tian <feng.t...@intel.com> CC: Jiewen Yao <jiewen....@intel.com> CC: Michael Kinney <michael.d.kin...@intel.com> --- UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc | 12 ++++ UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm | 117 ++++++++++++++++++++++++++++++++++ UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm | 107 +++++++++++++++++++++++++++++++ 3 files changed, 236 insertions(+)
diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc index 2d30db4..1f02dad 100644 --- a/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpEqu.inc @@ -21,4 +21,16 @@ PROTECT_MODE_CS equ 10h PROTECT_MODE_DS equ 18h +VacantFlag equ 00h +NotVacantFlag equ 0ffh + +LockLocation equ (RendezvousFunnelProcEnd - RendezvousFunnelProcStart) +StackStartAddressLocation equ LockLocation + 04h +StackSizeLocation equ LockLocation + 08h +ApProcedureLocation equ LockLocation + 0Ch +GdtrLocation equ LockLocation + 10h +IdtrLocation equ LockLocation + 16h +BufferStartLocation equ LockLocation + 1Ch +PmodeOffsetLocation equ LockLocation + 20h +NumApsExecutingLoction equ LockLocation + 24h diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm index ca9c15a..c8bdc52 100644 --- a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.asm @@ -22,8 +22,125 @@ .model flat include MpEqu.inc + .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 + + + 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:: + AsmInitializeGdt PROC near C PUBLIC push ebp diff --git a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm index 180b637..379f13e 100644 --- a/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm +++ b/UefiCpuPkg/CpuMpPei/Ia32/MpFuncs.nasm @@ -22,6 +22,113 @@ SECTION .text +;------------------------------------------------------------------------------------- +;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. +;------------------------------------------------------------------------------------- +global ASM_PFX(RendezvousFunnelProc) +ASM_PFX(RendezvousFunnelProc): +RendezvousFunnelProcStart: +; At this point CS = 0x(vv00) and ip= 0x0. +BITS 16 + mov ebp, eax ; save BIST information + + mov ax, cs + mov ds, ax + mov es, ax + mov ss, ax + xor ax, ax + mov fs, ax + mov gs, ax + + mov si, BufferStartLocation + mov ebx, [si] + + mov di, PmodeOffsetLocation + mov eax, [di] + mov di, ax + sub di, 06h + add eax, ebx + mov [di],eax + + mov si, GdtrLocation +o32 lgdt [cs:si] + + mov si, IdtrLocation +o32 lidt [cs:si] + + xor ax, ax + mov ds, ax + + mov eax, cr0 ;Get control register 0 + or eax, 000000003h ;Set PE bit (bit #0) & MP + mov cr0, eax + + jmp PROTECT_MODE_CS:strict dword 0 ; far jump to protected mode +BITS 32 +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 [edi], eax + cmp eax, NotVacantFlag + jz TestLock + + mov edi, esi + add edi, NumApsExecutingLoction + inc dword [edi] + mov ebx, [edi] + +ProgramStack: + mov edi, esi + add edi, StackSizeLocation + mov eax, [edi] + mov edi, esi + add edi, StackStartAddressLocation + add eax, [edi] + mov esp, eax + mov [edi], eax + +Releaselock: + mov eax, VacantFlag + mov edi, esi + add edi, LockLocation + xchg [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 + + + 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, [edi] + + call eax ; invoke C function + + jmp $ ; never reach here +RendezvousFunnelProcEnd: + global ASM_PFX(AsmInitializeGdt) ASM_PFX(AsmInitializeGdt): -- 1.9.5.msysgit.0 ------------------------------------------------------------------------------ Don't Limit Your Business. 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