diff options
| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm')
| -rw-r--r-- | roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm b/roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm new file mode 100644 index 000000000..e7261b41c --- /dev/null +++ b/roms/edk2/IntelFsp2Pkg/FspSecCore/Ia32/FspApiEntryM.nasm @@ -0,0 +1,247 @@ +;; @file
+; Provide FSP API entry points.
+;
+; Copyright (c) 2016 - 2019, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;;
+
+ SECTION .text
+
+;
+; Following are fixed PCDs
+;
+extern ASM_PFX(PcdGet32(PcdTemporaryRamBase))
+extern ASM_PFX(PcdGet32(PcdTemporaryRamSize))
+extern ASM_PFX(PcdGet32(PcdFspTemporaryRamSize))
+extern ASM_PFX(PcdGet8 (PcdFspHeapSizePercentage))
+
+struc FSPM_UPD_COMMON
+ ; FSP_UPD_HEADER {
+ .FspUpdHeader: resd 8
+ ; }
+ ; FSPM_ARCH_UPD {
+ .Revision: resb 1
+ .Reserved: resb 3
+ .NvsBufferPtr: resd 1
+ .StackBase: resd 1
+ .StackSize: resd 1
+ .BootLoaderTolumSize: resd 1
+ .BootMode: resd 1
+ .Reserved1: resb 8
+ ; }
+ .size:
+endstruc
+
+;
+; Following functions will be provided in C
+;
+extern ASM_PFX(SecStartup)
+extern ASM_PFX(FspApiCommon)
+
+;
+; Following functions will be provided in PlatformSecLib
+;
+extern ASM_PFX(AsmGetFspBaseAddress)
+extern ASM_PFX(AsmGetFspInfoHeader)
+
+API_PARAM1_OFFSET EQU 34h ; ApiParam1 [ sub esp,8 + pushad + pushfd + push eax + call]
+FSP_HEADER_IMGBASE_OFFSET EQU 1Ch
+FSP_HEADER_CFGREG_OFFSET EQU 24h
+
+;----------------------------------------------------------------------------
+; FspMemoryInit API
+;
+; This FSP API is called after TempRamInit and initializes the memory.
+;
+;----------------------------------------------------------------------------
+global ASM_PFX(FspMemoryInitApi)
+ASM_PFX(FspMemoryInitApi):
+ mov eax, 3 ; FSP_API_INDEX.FspMemoryInitApiIndex
+ jmp ASM_PFX(FspApiCommon)
+
+;----------------------------------------------------------------------------
+; TempRamExitApi API
+;
+; This API tears down temporary RAM
+;
+;----------------------------------------------------------------------------
+global ASM_PFX(TempRamExitApi)
+ASM_PFX(TempRamExitApi):
+ mov eax, 4 ; FSP_API_INDEX.TempRamExitApiIndex
+ jmp ASM_PFX(FspApiCommon)
+
+;----------------------------------------------------------------------------
+; FspApiCommonContinue API
+;
+; This is the FSP API common entry point to resume the FSP execution
+;
+;----------------------------------------------------------------------------
+global ASM_PFX(FspApiCommonContinue)
+ASM_PFX(FspApiCommonContinue):
+ ;
+ ; EAX holds the API index
+ ;
+
+ ;
+ ; FspMemoryInit API setup the initial stack frame
+ ;
+
+ ;
+ ; Place holder to store the FspInfoHeader pointer
+ ;
+ push eax
+
+ ;
+ ; Update the FspInfoHeader pointer
+ ;
+ push eax
+ call ASM_PFX(AsmGetFspInfoHeader)
+ mov [esp + 4], eax
+ pop eax
+
+ ;
+ ; Create a Task Frame in the stack for the Boot Loader
+ ;
+ pushfd ; 2 pushf for 4 byte alignment
+ cli
+ pushad
+
+ ; Reserve 8 bytes for IDT save/restore
+ sub esp, 8
+ sidt [esp]
+
+
+ ; Get Stackbase and StackSize from FSPM_UPD Param
+ mov edx, [esp + API_PARAM1_OFFSET]
+ cmp edx, 0
+ jnz FspStackSetup
+
+ ; Get UPD default values if FspmUpdDataPtr (ApiParam1) is null
+ push eax
+ call ASM_PFX(AsmGetFspInfoHeader)
+ mov edx, [eax + FSP_HEADER_IMGBASE_OFFSET]
+ add edx, [eax + FSP_HEADER_CFGREG_OFFSET]
+ pop eax
+
+FspStackSetup:
+ ;
+ ; StackBase = temp memory base, StackSize = temp memory size
+ ;
+ mov edi, [edx + FSPM_UPD_COMMON.StackBase]
+ mov ecx, [edx + FSPM_UPD_COMMON.StackSize]
+
+ ;
+ ; Keep using bootloader stack if heap size % is 0
+ ;
+ mov bl, BYTE [ASM_PFX(PcdGet8 (PcdFspHeapSizePercentage))]
+ cmp bl, 0
+ jz SkipStackSwitch
+
+ ;
+ ; Set up a dedicated temp ram stack for FSP if FSP heap size % doesn't equal 0
+ ;
+ add edi, ecx
+ ;
+ ; Switch to new FSP stack
+ ;
+ xchg edi, esp ; Exchange edi and esp, edi will be assigned to the current esp pointer and esp will be Stack base + Stack size
+
+SkipStackSwitch:
+ ;
+ ; If heap size % is 0:
+ ; EDI is FSPM_UPD_COMMON.StackBase and will hold ESP later (boot loader stack pointer)
+ ; ECX is FSPM_UPD_COMMON.StackSize
+ ; ESP is boot loader stack pointer (no stack switch)
+ ; BL is 0 to indicate no stack switch (EBX will hold FSPM_UPD_COMMON.StackBase later)
+ ;
+ ; If heap size % is not 0
+ ; EDI is boot loader stack pointer
+ ; ECX is FSPM_UPD_COMMON.StackSize
+ ; ESP is new stack (FSPM_UPD_COMMON.StackBase + FSPM_UPD_COMMON.StackSize)
+ ; BL is NOT 0 to indicate stack has switched
+ ;
+ cmp bl, 0
+ jnz StackHasBeenSwitched
+
+ mov ebx, edi ; Put FSPM_UPD_COMMON.StackBase to ebx as temp memory base
+ mov edi, esp ; Put boot loader stack pointer to edi
+ jmp StackSetupDone
+
+StackHasBeenSwitched:
+ mov ebx, esp ; Put Stack base + Stack size in ebx
+ sub ebx, ecx ; Stack base + Stack size - Stack size as temp memory base
+
+StackSetupDone:
+
+ ;
+ ; Pass the API Idx to SecStartup
+ ;
+ push eax
+
+ ;
+ ; Pass the BootLoader stack to SecStartup
+ ;
+ push edi
+
+ ;
+ ; Pass entry point of the PEI core
+ ;
+ call ASM_PFX(AsmGetFspBaseAddress)
+ mov edi, eax
+ call ASM_PFX(AsmGetPeiCoreOffset)
+ add edi, eax
+ push edi
+
+ ;
+ ; Pass BFV into the PEI Core
+ ; It uses relative address to calculate the actual boot FV base
+ ; For FSP implementation with single FV, PcdFspBootFirmwareVolumeBase and
+ ; PcdFspAreaBaseAddress are the same. For FSP with multiple FVs,
+ ; they are different. The code below can handle both cases.
+ ;
+ call ASM_PFX(AsmGetFspBaseAddress)
+ push eax
+
+ ;
+ ; Pass stack base and size into the PEI Core
+ ;
+ push ebx
+ push ecx
+
+ ;
+ ; Pass Control into the PEI Core
+ ;
+ call ASM_PFX(SecStartup)
+ add esp, 4
+exit:
+ ret
+
+global ASM_PFX(FspPeiCoreEntryOff)
+ASM_PFX(FspPeiCoreEntryOff):
+ ;
+ ; This value will be pached by the build script
+ ;
+ DD 0x12345678
+
+global ASM_PFX(AsmGetPeiCoreOffset)
+ASM_PFX(AsmGetPeiCoreOffset):
+ mov eax, dword [ASM_PFX(FspPeiCoreEntryOff)]
+ ret
+
+;----------------------------------------------------------------------------
+; TempRamInit API
+;
+; Empty function for WHOLEARCHIVE build option
+;
+;----------------------------------------------------------------------------
+global ASM_PFX(TempRamInitApi)
+ASM_PFX(TempRamInitApi):
+ jmp $
+ ret
+
+;----------------------------------------------------------------------------
+; Module Entrypoint API
+;----------------------------------------------------------------------------
+global ASM_PFX(_ModuleEntryPoint)
+ASM_PFX(_ModuleEntryPoint):
+ jmp $
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