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7df447930c42addaf2cc0d32916141d95ded677e
EDK2-fork/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryT.nasm
Chasel Chiu 7df447930c IntelFsp2Pkg: LoadMicrocodeDefault() causing unnecessary delay. 
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4391

FSP should support the scenario that CPU microcode already loaded
before calling LoadMicrocodeDefault(), in this case it should return
directly without spending more time.
Also the LoadMicrocodeDefault() should only attempt to load one version
of the microcode for current CPU and return directly without parsing
rest of the microcode in FV.

This patch also removed unnecessary LoadCheck code after supporting
CPU microcode already loaded scenario.

Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
2023-04-04 17:18:20 +00:00

650 lines
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NASM
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;; @file
; Provide FSP API entry points.
;
; Copyright (c) 2016 - 2022, Intel Corporation. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;;
SECTION .text
%include "SaveRestoreSseNasm.inc"
%include "MicrocodeLoadNasm.inc"
;
; Following are fixed PCDs
;
extern ASM_PFX(PcdGet32 (PcdTemporaryRamBase))
extern ASM_PFX(PcdGet32 (PcdTemporaryRamSize))
extern ASM_PFX(PcdGet32 (PcdFspReservedBufferSize))
;
; Following functions will be provided in PlatformSecLib
;
extern ASM_PFX(AsmGetFspBaseAddress)
extern ASM_PFX(AsmGetFspInfoHeaderNoStack)
;extern ASM_PFX(LoadMicrocode) ; @todo: needs a weak implementation
extern ASM_PFX(SecPlatformInit) ; @todo: needs a weak implementation
extern ASM_PFX(SecCarInit)
;
; Define the data length that we saved on the stack top
;
DATA_LEN_OF_PER0 EQU 18h
DATA_LEN_OF_MCUD EQU 18h
DATA_LEN_AT_STACK_TOP EQU (DATA_LEN_OF_PER0 + DATA_LEN_OF_MCUD + 4)
;
; @todo: These structures are moved from MicrocodeLoadNasm.inc to avoid
; build error. This needs to be fixed later on.
;
struc MicrocodeHdr
.MicrocodeHdrVersion: resd 1
.MicrocodeHdrRevision: resd 1
.MicrocodeHdrDate: resd 1
.MicrocodeHdrProcessor: resd 1
.MicrocodeHdrChecksum: resd 1
.MicrocodeHdrLoader: resd 1
.MicrocodeHdrFlags: resd 1
.MicrocodeHdrDataSize: resd 1
.MicrocodeHdrTotalSize: resd 1
.MicrocodeHdrRsvd: resd 3
.size:
endstruc
struc ExtSigHdr
.ExtSigHdrCount: resd 1
.ExtSigHdrChecksum: resd 1
.ExtSigHdrRsvd: resd 3
.size:
endstruc
struc ExtSig
.ExtSigProcessor: resd 1
.ExtSigFlags: resd 1
.ExtSigChecksum: resd 1
.size:
endstruc
struc LoadMicrocodeParams
; FSP_UPD_HEADER {
.FspUpdHeader: resd 8
; }
; FSPT_CORE_UPD {
.MicrocodeCodeAddr: resd 1
.MicrocodeCodeSize: resd 1
.CodeRegionBase: resd 1
.CodeRegionSize: resd 1
; }
.size:
endstruc
struc LoadMicrocodeParamsFsp22
; FSP_UPD_HEADER {
.FspUpdHeaderSignature: resd 2
.FspUpdHeaderRevision: resb 1
.FspUpdHeaderReserved: resb 23
; }
; FSPT_ARCH_UPD {
.FsptArchRevision: resb 1
.FsptArchReserved: resb 3
.FsptArchUpd: resd 7
; }
; FSPT_CORE_UPD {
.MicrocodeCodeAddr: resd 1
.MicrocodeCodeSize: resd 1
.CodeRegionBase: resd 1
.CodeRegionSize: resd 1
; }
.size:
endstruc
struc LoadMicrocodeParamsFsp24
; FSP_UPD_HEADER {
.FspUpdHeaderSignature: resd 2
.FspUpdHeaderRevision: resb 1
.FspUpdHeaderReserved: resb 23
; }
; FSPT_ARCH2_UPD {
.FsptArchRevision: resb 1
.FsptArchReserved: resb 3
.FsptArchLength: resd 1
.FspDebugHandler resq 1
.FsptArchUpd: resd 4
; }
; FSPT_CORE_UPD {
.MicrocodeCodeAddr: resq 1
.MicrocodeCodeSize: resq 1
.CodeRegionBase: resq 1
.CodeRegionSize: resq 1
; }
.size:
endstruc
;
; Define SSE macros
;
;
;args 1: ReturnAddress 2:MmxRegister
;
%macro LOAD_MMX_EXT 2
mov esi, %1
movd %2, esi ; save ReturnAddress into MMX
%endmacro
;
;args 1: RoutineLabel 2:MmxRegister
;
%macro CALL_MMX_EXT 2
mov esi, %%ReturnAddress
movd %2, esi ; save ReturnAddress into MMX
jmp %1
%%ReturnAddress:
%endmacro
;
;arg 1:MmxRegister
;
%macro RET_ESI_EXT 1
movd esi, %1 ; move ReturnAddress from MMX to ESI
jmp esi
%endmacro
;
;arg 1:RoutineLabel
;
%macro CALL_MMX 1
CALL_MMX_EXT %1, mm7
%endmacro
%macro RET_ESI 0
RET_ESI_EXT mm7
%endmacro
%macro CALL_EDI 1
mov edi, %%ReturnAddress
jmp %1
%%ReturnAddress:
%endmacro
%macro CALL_EBP 1
mov ebp, %%ReturnAddress
jmp %1
%%ReturnAddress:
%endmacro
%macro RET_EBP 0
jmp ebp ; restore EIP from EBP
%endmacro
;
; Load UPD region pointer in ECX
;
global ASM_PFX(LoadUpdPointerToECX)
ASM_PFX(LoadUpdPointerToECX):
;
; esp + 4 is input UPD parameter
; If esp + 4 is NULL the default UPD should be used
; ecx will be the UPD region that should be used
;
mov ecx, dword [esp + 4]
cmp ecx, 0
jnz ParamValid
;
; Fall back to default UPD region
;
CALL_EDI ASM_PFX(AsmGetFspInfoHeaderNoStack)
mov ecx, DWORD [eax + 01Ch] ; Read FsptImageBaseAddress
add ecx, DWORD [eax + 024h] ; Get Cfg Region base address = FsptImageBaseAddress + CfgRegionOffset
ParamValid:
RET_EBP
;
; @todo: The strong/weak implementation does not work.
; This needs to be reviewed later.
;
;------------------------------------------------------------------------------
;
;;global ASM_PFX(SecPlatformInitDefault)
;ASM_PFX(SecPlatformInitDefault):
; ; Inputs:
; ; mm7 -> Return address
; ; Outputs:
; ; eax -> 0 - Successful, Non-zero - Failed.
; ; Register Usage:
; ; eax is cleared and ebp is used for return address.
; ; All others reserved.
;
; ; Save return address to EBP
; movd ebp, mm7
;
; xor eax, eax
;Exit1:
; jmp ebp
;------------------------------------------------------------------------------
global ASM_PFX(LoadMicrocodeDefault)
ASM_PFX(LoadMicrocodeDefault):
; Inputs:
; ecx -> UPD region contains LoadMicrocodeParams pointer
; Register Usage:
; All are destroyed
; Assumptions:
; No memory available, stack is hard-coded and used for return address
; Executed by SBSP and NBSP
; Beginning of microcode update region starts on paragraph boundary
;
; Save return address to EBP
;
movd ebp, mm7
mov esp, ecx ; ECX has been assigned to UPD region
cmp esp, 0
jz ParamError
;
; If microcode already loaded before this function, exit this function with SUCCESS.
;
mov ecx, MSR_IA32_BIOS_SIGN_ID
xor eax, eax ; Clear EAX
xor edx, edx ; Clear EDX
wrmsr ; Load 0 to MSR at 8Bh
mov eax, 1
cpuid
mov ecx, MSR_IA32_BIOS_SIGN_ID
rdmsr ; Get current microcode signature
xor eax, eax
test edx, edx
jnz Exit2
; skip loading Microcode if the MicrocodeCodeSize is zero
; and report error if size is less than 2k
; first check UPD header revision
cmp byte [esp + LoadMicrocodeParamsFsp22.FspUpdHeaderRevision], 2
jb Fsp20UpdHeader
cmp byte [esp + LoadMicrocodeParamsFsp22.FsptArchRevision], 2
je Fsp24UpdHeader
jmp Fsp22UpdHeader
Fsp20UpdHeader:
; UPD structure is compliant with FSP spec 2.0/2.1
mov eax, dword [esp + LoadMicrocodeParams.MicrocodeCodeSize]
cmp eax, 0
jz Exit2
cmp eax, 0800h
jl ParamError
mov esi, dword [esp + LoadMicrocodeParams.MicrocodeCodeAddr]
cmp esi, 0
jnz CheckMainHeader
jmp ParamError
Fsp22UpdHeader:
; UPD structure is compliant with FSP spec 2.2
mov eax, dword [esp + LoadMicrocodeParamsFsp22.MicrocodeCodeSize]
cmp eax, 0
jz Exit2
cmp eax, 0800h
jl ParamError
mov esi, dword [esp + LoadMicrocodeParamsFsp22.MicrocodeCodeAddr]
cmp esi, 0
jnz CheckMainHeader
jmp ParamError
Fsp24UpdHeader:
; UPD structure is compliant with FSP spec 2.4
mov eax, dword [esp + LoadMicrocodeParamsFsp24.MicrocodeCodeSize]
cmp eax, 0
jz Exit2
cmp eax, 0800h
jl ParamError
mov esi, dword [esp + LoadMicrocodeParamsFsp24.MicrocodeCodeAddr]
cmp esi, 0
jnz CheckMainHeader
ParamError:
mov eax, 080000002h
jmp Exit2
CheckMainHeader:
; Get processor signature and platform ID from the installed processor
; and save into registers for later use
; ebx = processor signature
; edx = platform ID
mov eax, 1
cpuid
mov ebx, eax
mov ecx, MSR_IA32_PLATFORM_ID
rdmsr
mov ecx, edx
shr ecx, 50-32 ; shift (50d-32d=18d=0x12) bits
and ecx, 7h ; platform id at bit[52..50]
mov edx, 1
shl edx, cl
; Current register usage
; esp -> stack with parameters
; esi -> microcode update to check
; ebx = processor signature
; edx = platform ID
; Check for valid microcode header
; Minimal test checking for header version and loader version as 1
mov eax, dword 1
cmp dword [esi + MicrocodeHdr.MicrocodeHdrVersion], eax
jne AdvanceFixedSize
cmp dword [esi + MicrocodeHdr.MicrocodeHdrLoader], eax
jne AdvanceFixedSize
; Check if signature and plaform ID match
cmp ebx, dword [esi + MicrocodeHdr.MicrocodeHdrProcessor]
jne LoadMicrocodeDefault1
test edx, dword [esi + MicrocodeHdr.MicrocodeHdrFlags ]
jnz LoadMicrocode ; Jif signature and platform ID match
LoadMicrocodeDefault1:
; Check if extended header exists
; First check if MicrocodeHdrTotalSize and MicrocodeHdrDataSize are valid
xor eax, eax
cmp dword [esi + MicrocodeHdr.MicrocodeHdrTotalSize], eax
je NextMicrocode
cmp dword [esi + MicrocodeHdr.MicrocodeHdrDataSize], eax
je NextMicrocode
; Then verify total size - sizeof header > data size
mov ecx, dword [esi + MicrocodeHdr.MicrocodeHdrTotalSize]
sub ecx, MicrocodeHdr.size
cmp ecx, dword [esi + MicrocodeHdr.MicrocodeHdrDataSize]
jng NextMicrocode ; Jif extended header does not exist
; Set edi -> extended header
mov edi, esi
add edi, MicrocodeHdr.size
add edi, dword [esi + MicrocodeHdr.MicrocodeHdrDataSize]
; Get count of extended structures
mov ecx, dword [edi + ExtSigHdr.ExtSigHdrCount]
; Move pointer to first signature structure
add edi, ExtSigHdr.size
CheckExtSig:
; Check if extended signature and platform ID match
cmp dword [edi + ExtSig.ExtSigProcessor], ebx
jne LoadMicrocodeDefault2
test dword [edi + ExtSig.ExtSigFlags], edx
jnz LoadMicrocode ; Jif signature and platform ID match
LoadMicrocodeDefault2:
; Check if any more extended signatures exist
add edi, ExtSig.size
loop CheckExtSig
NextMicrocode:
; Advance just after end of this microcode
xor eax, eax
cmp dword [esi + MicrocodeHdr.MicrocodeHdrTotalSize], eax
je LoadMicrocodeDefault3
add esi, dword [esi + MicrocodeHdr.MicrocodeHdrTotalSize]
jmp CheckAddress
LoadMicrocodeDefault3:
add esi, dword 2048
jmp CheckAddress
AdvanceFixedSize:
; Advance by 4X dwords
add esi, dword 1024
CheckAddress:
; Check UPD header revision
cmp byte [esp + LoadMicrocodeParamsFsp22.FspUpdHeaderRevision], 2
jb Fsp20UpdHeader1
cmp byte [esp + LoadMicrocodeParamsFsp22.FsptArchRevision], 2
je Fsp24UpdHeader1;
jmp Fsp22UpdHeader1
Fsp20UpdHeader1:
; UPD structure is compliant with FSP spec 2.0/2.1
; Is automatic size detection ?
mov eax, dword [esp + LoadMicrocodeParams.MicrocodeCodeSize]
cmp eax, 0ffffffffh
jz LoadMicrocodeDefault4
; Address >= microcode region address + microcode region size?
add eax, dword [esp + LoadMicrocodeParams.MicrocodeCodeAddr]
cmp esi, eax
jae Done ;Jif address is outside of microcode region
jmp CheckMainHeader
Fsp22UpdHeader1:
; UPD structure is compliant with FSP spec 2.2
; Is automatic size detection ?
mov eax, dword [esp + LoadMicrocodeParamsFsp22.MicrocodeCodeSize]
cmp eax, 0ffffffffh
jz LoadMicrocodeDefault4
; Address >= microcode region address + microcode region size?
add eax, dword [esp + LoadMicrocodeParamsFsp22.MicrocodeCodeAddr]
cmp esi, eax
jae Done ;Jif address is outside of microcode region
jmp CheckMainHeader
Fsp24UpdHeader1:
; UPD structure is compliant with FSP spec 2.4
; Is automatic size detection ?
mov eax, dword [esp + LoadMicrocodeParamsFsp24.MicrocodeCodeSize]
cmp eax, 0ffffffffh
jz LoadMicrocodeDefault4
; Address >= microcode region address + microcode region size?
add eax, dword [esp + LoadMicrocodeParamsFsp24.MicrocodeCodeAddr]
cmp esi, eax
jae Done ;Jif address is outside of microcode region
jmp CheckMainHeader
LoadMicrocodeDefault4:
; Is valid Microcode start point ?
cmp dword [esi + MicrocodeHdr.MicrocodeHdrVersion], 0ffffffffh
jz Done
jmp CheckMainHeader
LoadMicrocode:
; EAX contains the linear address of the start of the Update Data
; EDX contains zero
; ECX contains 79h (IA32_BIOS_UPDT_TRIG)
; Start microcode load with wrmsr
mov eax, esi
add eax, MicrocodeHdr.size
xor edx, edx
mov ecx, MSR_IA32_BIOS_UPDT_TRIG
wrmsr
mov eax, 1
cpuid
Done:
mov ecx, MSR_IA32_BIOS_SIGN_ID
xor eax, eax ; Clear EAX
xor edx, edx ; Clear EDX
wrmsr ; Load 0 to MSR at 8Bh
mov eax, 1
cpuid
mov ecx, MSR_IA32_BIOS_SIGN_ID
rdmsr ; Get current microcode signature
xor eax, eax
cmp edx, 0
jnz Exit2
mov eax, 08000000Eh
Exit2:
jmp ebp
;
; EstablishStackFsp: EDI should be preserved cross this function
;
global ASM_PFX(EstablishStackFsp)
ASM_PFX(EstablishStackFsp):
;
; Save parameter pointer in edx
;
mov edx, ecx ; ECX has been assigned to UPD region
;
; Enable FSP STACK
;
mov esp, DWORD [ASM_PFX(PcdGet32 (PcdTemporaryRamBase))]
add esp, DWORD [ASM_PFX(PcdGet32 (PcdTemporaryRamSize))]
push DATA_LEN_OF_MCUD ; Size of the data region
push 4455434Dh ; Signature of the data region 'MCUD'
; check UPD structure revision (edx + 8)
cmp byte [edx + LoadMicrocodeParamsFsp22.FspUpdHeaderRevision], 2
jb Fsp20UpdHeader2
cmp byte [esp + LoadMicrocodeParamsFsp22.FsptArchRevision], 2
je Fsp24UpdHeader2
jmp Fsp22UpdHeader2
Fsp20UpdHeader2:
; UPD structure is compliant with FSP spec 2.0/2.1
push dword [edx + LoadMicrocodeParams.CodeRegionSize] ; Code size sizeof(FSPT_UPD_COMMON) + 12
push dword [edx + LoadMicrocodeParams.CodeRegionBase] ; Code base sizeof(FSPT_UPD_COMMON) + 8
push dword [edx + LoadMicrocodeParams.MicrocodeCodeSize] ; Microcode size sizeof(FSPT_UPD_COMMON) + 4
push dword [edx + LoadMicrocodeParams.MicrocodeCodeAddr] ; Microcode base sizeof(FSPT_UPD_COMMON) + 0
jmp ContinueAfterUpdPush
Fsp22UpdHeader2:
; UPD structure is compliant with FSP spec 2.2
push dword [edx + LoadMicrocodeParamsFsp22.CodeRegionSize] ; Code size sizeof(FSPT_UPD_COMMON) + 12
push dword [edx + LoadMicrocodeParamsFsp22.CodeRegionBase] ; Code base sizeof(FSPT_UPD_COMMON) + 8
push dword [edx + LoadMicrocodeParamsFsp22.MicrocodeCodeSize] ; Microcode size sizeof(FSPT_UPD_COMMON) + 4
push dword [edx + LoadMicrocodeParamsFsp22.MicrocodeCodeAddr] ; Microcode base sizeof(FSPT_UPD_COMMON) + 0
jmp ContinueAfterUpdPush
Fsp24UpdHeader2:
; UPD structure is compliant with FSP spec 2.4
push dword [edx + LoadMicrocodeParamsFsp24.CodeRegionSize] ; Code size sizeof(FSPT_UPD_COMMON) + 24
push dword [edx + LoadMicrocodeParamsFsp24.CodeRegionBase] ; Code base sizeof(FSPT_UPD_COMMON) + 16
push dword [edx + LoadMicrocodeParamsFsp24.MicrocodeCodeSize] ; Microcode size sizeof(FSPT_UPD_COMMON) + 8
push dword [edx + LoadMicrocodeParamsFsp24.MicrocodeCodeAddr] ; Microcode base sizeof(FSPT_UPD_COMMON) + 0
ContinueAfterUpdPush:
;
; Save API entry/exit timestamp into stack
;
push DATA_LEN_OF_PER0 ; Size of the data region
push 30524550h ; Signature of the data region 'PER0'
rdtsc
push edx
push eax
LOAD_EDX
push edx
LOAD_EAX
push eax
;
; Terminator for the data on stack
;
push 0
;
; Set ECX/EDX to the BootLoader temporary memory range
;
mov ecx, [ASM_PFX(PcdGet32 (PcdTemporaryRamBase))]
mov edx, ecx
add edx, [ASM_PFX(PcdGet32 (PcdTemporaryRamSize))]
sub edx, [ASM_PFX(PcdGet32 (PcdFspReservedBufferSize))]
cmp ecx, edx ;If PcdFspReservedBufferSize >= PcdTemporaryRamSize, then error.
jb EstablishStackFspSuccess
mov eax, 80000003h ;EFI_UNSUPPORTED
jmp EstablishStackFspExit
EstablishStackFspSuccess:
xor eax, eax
EstablishStackFspExit:
RET_ESI
;----------------------------------------------------------------------------
; TempRamInit API
;
; This FSP API will load the microcode update, enable code caching for the
; region specified by the boot loader and also setup a temporary stack to be
; used till main memory is initialized.
;
;----------------------------------------------------------------------------
global ASM_PFX(TempRamInitApi)
ASM_PFX(TempRamInitApi):
;
; Ensure SSE is enabled
;
ENABLE_SSE
;
; Save EBP, EBX, ESI, EDI & ESP in XMM7 & XMM6
;
SAVE_REGS
;
; Save timestamp into XMM6
;
rdtsc
SAVE_EAX
SAVE_EDX
CALL_EBP ASM_PFX(LoadUpdPointerToECX) ; ECX for UPD param
SAVE_ECX ; save UPD param to slot 3 in xmm6
;
; Sec Platform Init
;
CALL_MMX ASM_PFX(SecPlatformInit)
cmp eax, 0
jnz TempRamInitExit
; Load microcode
LOAD_ESP
LOAD_ECX
CALL_MMX ASM_PFX(LoadMicrocodeDefault)
SAVE_UCODE_STATUS ; Save microcode return status in slot 1 in xmm5.
;@note If return value eax is not 0, microcode did not load, but continue and attempt to boot.
; Call Sec CAR Init
LOAD_ESP
LOAD_ECX
CALL_MMX ASM_PFX(SecCarInit)
cmp eax, 0
jnz TempRamInitExit
LOAD_ESP
LOAD_ECX
mov edi, ecx ; Save UPD param to EDI for later code use
CALL_MMX ASM_PFX(EstablishStackFsp)
cmp eax, 0
jnz TempRamInitExit
LOAD_UCODE_STATUS ; Restore microcode status if no CAR init error from slot 1 in xmm5.
TempRamInitExit:
mov bl, al ; save al data in bl
mov al, 07Fh ; API exit postcode 7f
out 080h, al
mov al, bl ; restore al data from bl
;
; Load EBP, EBX, ESI, EDI & ESP from XMM7 & XMM6
;
LOAD_REGS
ret
;----------------------------------------------------------------------------
; Module Entrypoint API
;----------------------------------------------------------------------------
global ASM_PFX(_ModuleEntryPoint)
ASM_PFX(_ModuleEntryPoint):
jmp $
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