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system76-edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryT.nasm
Cosmo Lai 31e97bdae2 IntelFsp2Pkg/FspSecCore: LoadMicrocodeDefault() failed with padding in FV. 
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3017

Platform microcode FV may have padding between each version of microcode
binary, and current FSP-T/LoadMicrocodeDefault() cannot handle this case
and return not_found unexpectedly.

Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Chasel Chiu <chasel.chiu@intel.com>
Signed-off-by: Cosmo Lai <cosmo.lai@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>
Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
2020-10-27 06:06:03 +00:00

540 lines
15 KiB
NASM
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;; @file
; Provide FSP API entry points.
;
; Copyright (c) 2016 - 2020, 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(AsmGetFspInfoHeader)
;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{
.FsptArchUpd: resd 8
; }
; FSPT_CORE_UPD {
.MicrocodeCodeAddr: resd 1
.MicrocodeCodeSize: resd 1
.CodeRegionBase: resd 1
.CodeRegionSize: resd 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
;
; @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:
; esp -> LoadMicrocodeParams pointer
; Register Usage:
; esp Preserved
; All others 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
cmp esp, 0
jz ParamError
mov eax, dword [esp + 4] ; Parameter pointer
cmp eax, 0
jz ParamError
mov esp, eax
; 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
jae Fsp22UpdHeader
; 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
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 LoadCheck ; 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 LoadCheck ; 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
jae Fsp22UpdHeader1
; 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
LoadMicrocodeDefault4:
; Is valid Microcode start point ?
cmp dword [esi + MicrocodeHdr.MicrocodeHdrVersion], 0ffffffffh
jz Done
LoadCheck:
; Get the revision of the current microcode update loaded
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
; Verify this microcode update is not already loaded
cmp dword [esi + MicrocodeHdr.MicrocodeHdrRevision], edx
je Continue
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
Continue:
jmp NextMicrocode
Done:
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
global ASM_PFX(EstablishStackFsp)
ASM_PFX(EstablishStackFsp):
;
; Save parameter pointer in edx
;
mov edx, dword [esp + 4]
;
; 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
jae Fsp22UpdHeader2
; 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
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
;
; Check Parameter
;
mov eax, dword [esp + 4]
cmp eax, 0
mov eax, 80000002h
jz TempRamInitExit
;
; Sec Platform Init
;
CALL_MMX ASM_PFX(SecPlatformInit)
cmp eax, 0
jnz TempRamInitExit
; Load microcode
LOAD_ESP
CALL_MMX ASM_PFX(LoadMicrocodeDefault)
SXMMN xmm6, 3, eax ;Save microcode return status in ECX-SLOT 3 in xmm6.
;@note If return value eax is not 0, microcode did not load, but continue and attempt to boot.
; Call Sec CAR Init
LOAD_ESP
CALL_MMX ASM_PFX(SecCarInit)
cmp eax, 0
jnz TempRamInitExit
LOAD_ESP
CALL_MMX ASM_PFX(EstablishStackFsp)
cmp eax, 0
jnz TempRamInitExit
LXMMN xmm6, eax, 3 ;Restore microcode status if no CAR init error from ECX-SLOT 3 in xmm6.
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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