630df8c86e
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3893 1.Added EFIAPI to FspNotifyPhasePeimEntryPoint, SwapStack and PEI_CORE_ENTRY. 2.Treat both MAX_ADDRESS and MAX_UINT32 as invalid address for FSP global data in FspApiCallingCheck(). 3.Changed AsmReadEsp to AsmReadStackPointer. 4.Changed the type of the return value of AsmReadStackPointer from UINT32 to UINTN. 5.Changed the type of TemporaryMemoryBase, PermenentMemoryBase and BootLoaderStack from UINT32 to UINTN. 6.Some type casting to pointers are UINT32. Changed them to UINTN to accommodate both IA32 and X64. 7.Corrected some typos. Cc: Chasel Chiu <chasel.chiu@intel.com> Cc: Nate DeSimone <nathaniel.l.desimone@intel.com> Cc: Star Zeng <star.zeng@intel.com> Cc: Ashraf Ali S <ashraf.ali.s@intel.com> Signed-off-by: Ted Kuo <ted.kuo@intel.com> Reviewed-by: Chasel Chiu <chasel.chiu@intel.com> Reviewed-by: Nate DeSimone <nathaniel.l.desimone@intel.com>
122 lines
3.2 KiB
NASM
122 lines
3.2 KiB
NASM
;; @file
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; This is the code that goes from real-mode to protected mode.
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; It consumes the reset vector, configures the stack.
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;
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; Copyright (c) 2015 - 2022, Intel Corporation. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;;
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;
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; Define assembler characteristics
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;
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extern ASM_PFX(TempRamInitApi)
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SECTION .text
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%macro RET_ESI 0
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movd esi, mm7 ; restore EIP from MM7
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jmp esi
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%endmacro
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;
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; Perform early platform initialization
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;
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global ASM_PFX(SecPlatformInit)
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ASM_PFX(SecPlatformInit):
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RET_ESI
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;
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; Protected mode portion initializes stack, configures cache, and calls C entry point
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;
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;----------------------------------------------------------------------------
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;
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; Procedure: ProtectedModeEntryPoint
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;
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; Input: Executing in 32 Bit Protected (flat) mode
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; cs: 0-4GB
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; ds: 0-4GB
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; es: 0-4GB
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; fs: 0-4GB
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; gs: 0-4GB
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; ss: 0-4GB
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;
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; Output: This function never returns
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;
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; Destroys:
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; ecx
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; edi
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; esi
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; esp
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;
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; Description:
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; Perform any essential early platform initialisation
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; Setup a stack
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;
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;----------------------------------------------------------------------------
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global ASM_PFX(ProtectedModeEntryPoint)
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ASM_PFX(ProtectedModeEntryPoint):
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;
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; Dummy function. Consume 2 API to make sure they can be linked.
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;
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mov eax, ASM_PFX(TempRamInitApi)
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; Should never return
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jmp $
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;
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; ROM-based Global-Descriptor Table for the PEI Phase
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;
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align 16
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global ASM_PFX(BootGdtTable)
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;
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; GDT[0]: 0x00: Null entry, never used.
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;
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NULL_SEL equ $ - GDT_BASE ; Selector [0]
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GDT_BASE:
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ASM_PFX(BootGdtTable): DD 0
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DD 0
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;
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; Linear code segment descriptor
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;
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LINEAR_CODE_SEL equ $ - GDT_BASE ; Selector [0x8]
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DW 0FFFFh ; limit 0xFFFF
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DW 0 ; base 0
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DB 0
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DB 09Bh ; present, ring 0, data, expand-up, not-writable
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DB 0CFh ; page-granular, 32-bit
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DB 0
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;
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; System data segment descriptor
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;
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SYS_DATA_SEL equ $ - GDT_BASE ; Selector [0x10]
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DW 0FFFFh ; limit 0xFFFF
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DW 0 ; base 0
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DB 0
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DB 093h ; present, ring 0, data, expand-up, not-writable
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DB 0CFh ; page-granular, 32-bit
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DB 0
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GDT_SIZE EQU $ - GDT_BASE ; Size, in bytes
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;
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; GDT Descriptor
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;
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GdtDesc: ; GDT descriptor
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DW GDT_SIZE - 1 ; GDT limit
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DD GDT_BASE ; GDT base address
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global ASM_PFX(ProtectedModeEntryLinearAddress)
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global ASM_PFX(ProtectedModeEntryLinearOffset)
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ASM_PFX(ProtectedModeEntryLinearAddress):
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ASM_PFX(ProtectedModeEntryLinearOffset):
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DD ASM_PFX(ProtectedModeEntryPoint) ; Offset of our 32 bit code
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DW LINEAR_CODE_SEL
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