mirror of https://review.coreboot.org/STM.git
121 lines
3.0 KiB
ArmAsm
121 lines
3.0 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 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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# AsmStmInit.s
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#
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#------------------------------------------------------------------------------
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ASM_GLOBAL ASM_PFX(InitializeSmmMonitor)
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ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
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.equ STM_API_START, 0x00010001
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.equ STM_API_INITIALIZE_PROTECTION, 0x00010007
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.equ STM_STACK_SIZE, 0x8000
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#------------------------------------------------------------------------------
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# VOID
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# AsmInitializeSmmMonitor (
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# VOID
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# )
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ASM_PFX(_ModuleEntryPoint):
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cmpl $STM_API_INITIALIZE_PROTECTION, %eax # for BSP
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jz GoBsp
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cmpl $STM_API_START, %eax # for AP
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jz GoAp
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jmp DeadLoop
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GoBsp:
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# Assume ThisOffset is 0
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# ESP is pointer to stack bottom, NOT top
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movl $STM_STACK_SIZE, %eax # eax = STM_STACK_SIZE,
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lock xaddl %eax, (%esp) # eax = ThisOffset, ThisOffset += STM_STACK_SIZE (LOCK instruction)
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addl $STM_STACK_SIZE, %eax # eax = ThisOffset + STM_STACK_SIZE
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addl %eax, %esp # esp += ThisOffset + STM_STACK_SIZE
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#
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# Jump to C code
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#
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push %r15
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push %r14
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push %r13
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push %r12
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push %r11
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push %r10
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push %r9
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push %r8
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push %rdi
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push %rsi
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push %rbp
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push %rbp # should be rsp
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push %rbx
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push %rdx
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push %rcx
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movl $STM_API_INITIALIZE_PROTECTION, %eax
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push %rax
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movq %rsp, %rcx # parameter
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subq $0x20, %rsp
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call ASM_PFX(InitializeSmmMonitor)
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addq $0x20, %rsp
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# should never get here
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jmp DeadLoop
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GoAp:
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#
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# assign unique ESP for each processor
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#
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# |------------|<-ESP (PerProc)
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# | Reg |
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# |------------|
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# | Stack |
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# |------------|
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# | ThisOffset |
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# +------------+<-ESP (Common)
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# | Heap |
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# Assume ThisOffset is 0
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# ESP is pointer to stack bottom, NOT top
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movl $STM_STACK_SIZE, %eax # eax = STM_STACK_SIZE,
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lock xaddl %eax, (%esp) # eax = ThisOffset, ThisOffset += STM_STACK_SIZE (LOCK instruction)
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addl $STM_STACK_SIZE, %eax # eax = ThisOffset + STM_STACK_SIZE
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addl %eax, %esp # esp += ThisOffset + STM_STACK_SIZE
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#
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# Jump to C code
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#
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push %r15
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push %r14
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push %r13
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push %r12
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push %r11
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push %r10
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push %r9
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push %r8
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push %rdi
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push %rsi
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push %rbp
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push %rbp # should be rsp
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push %rbx
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push %rdx
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push %rcx
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movl $STM_API_START, %eax
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push %rax
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movq %rsp, %rcx # parameter
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subq $0x20, %rsp
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call ASM_PFX(InitializeSmmMonitor)
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addq $0x20, %rsp
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# should never get here
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DeadLoop:
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jmp .
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