mirror of https://github.com/acidanthera/audk.git
85 lines
2.5 KiB
ArmAsm
85 lines
2.5 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2009 - 2015, Intel Corporation. All rights reserved.<BR>
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php.
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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# Module Name:
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#
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# SmmInit.S
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#
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# Abstract:
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#
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# Functions for relocating SMBASE's for all processors
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#
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(gSmmCr0)
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ASM_GLOBAL ASM_PFX(gSmmCr3)
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ASM_GLOBAL ASM_PFX(gSmmCr4)
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ASM_GLOBAL ASM_PFX(gcSmmInitTemplate)
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ASM_GLOBAL ASM_PFX(gcSmmInitSize)
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ASM_GLOBAL ASM_PFX(gSmmJmpAddr)
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ASM_GLOBAL ASM_PFX(SmmRelocationSemaphoreComplete)
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ASM_GLOBAL ASM_PFX(gSmmInitStack)
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ASM_GLOBAL ASM_PFX(gcSmiInitGdtr)
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.equ PROTECT_MODE_CS, 0x08
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.equ PROTECT_MODE_DS, 0x20
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.text
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ASM_PFX(gcSmiInitGdtr):
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.word 0
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.quad 0
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SmmStartup:
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.byte 0x66,0xb8
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ASM_PFX(gSmmCr3): .space 4
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movl %eax, %cr3
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.byte 0x67,0x66
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lgdt %cs:(ASM_PFX(gcSmiInitGdtr) - SmmStartup)(%ebp)
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.byte 0x66,0xb8
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ASM_PFX(gSmmCr4): .space 4
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movl %eax, %cr4
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.byte 0x66,0xb8
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ASM_PFX(gSmmCr0): .space 4
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.byte 0xbf, PROTECT_MODE_DS, 0 # mov di, PROTECT_MODE_DS
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movl %eax, %cr0
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.byte 0x66,0xea # jmp far [ptr48]
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ASM_PFX(gSmmJmpAddr): .long Start32bit
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.word PROTECT_MODE_CS
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Start32bit:
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movl %edi,%ds
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movl %edi,%es
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movl %edi,%fs
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movl %edi,%gs
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movl %edi,%ss
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.byte 0xbc # mov esp, imm32
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ASM_PFX(gSmmInitStack): .space 4
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call ASM_PFX(SmmInitHandler)
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rsm
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ASM_PFX(gcSmmInitTemplate):
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_SmmInitTemplate:
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.byte 0x66
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movl $SmmStartup, %ebp
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.byte 0x66, 0x81, 0xed, 0, 0, 3, 0 # sub ebp, 0x30000
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jmp *%bp # jmp ebp actually
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ASM_PFX(gcSmmInitSize): .word . - ASM_PFX(gcSmmInitTemplate)
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ASM_PFX(SmmRelocationSemaphoreComplete):
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pushl %eax
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movl ASM_PFX(mRebasedFlag), %eax
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movb $1, (%eax)
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popl %eax
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jmp *ASM_PFX(mSmmRelocationOriginalAddress)
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