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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
STACK_SAVED_EAX_OFFSET EQU 4 * 7 ; size of a general purpose register * eax index
;
; Following functions will be provided in C
;
extern ASM_PFX(Loader2PeiSwitchStack)
extern ASM_PFX(FspApiCallingCheck)
;
; Following functions will be provided in ASM
;
extern ASM_PFX(FspApiCommonContinue)
extern ASM_PFX(AsmGetFspInfoHeader)
;----------------------------------------------------------------------------
; FspApiCommon API
;
; This is the FSP API common entry point to resume the FSP execution
;
;----------------------------------------------------------------------------
global ASM_PFX(FspApiCommon)
ASM_PFX(FspApiCommon):
;
; EAX holds the API index
;
;
; Stack must be ready
;
push eax
add esp, 4
cmp eax, dword [esp - 4]
jz FspApiCommon1
mov eax, 080000003h
jmp exit
FspApiCommon1:
;
; Verify the calling condition
;
pushad
push DWORD [esp + (4 * 8 + 4)] ; push ApiParam
push eax ; push ApiIdx
call ASM_PFX(FspApiCallingCheck)
add esp, 8
cmp eax, 0
jz FspApiCommon2
mov dword [esp + STACK_SAVED_EAX_OFFSET], eax
popad
exit:
ret
FspApiCommon2:
popad
cmp eax, 3 ; FspMemoryInit API
jz FspApiCommon3
cmp eax, 6 ; FspMultiPhaseSiInitApiIndex API
jz FspApiCommon3
cmp eax, 8 ; FspMultiPhaseMemInitApiIndex API
jz FspApiCommon3
call ASM_PFX(AsmGetFspInfoHeader)
jmp ASM_PFX(Loader2PeiSwitchStack)
FspApiCommon3:
jmp ASM_PFX(FspApiCommonContinue)
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