| 1 | ;------------------------------------------------------------------------------
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| 2 | ;*
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| 3 | ;* Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>
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| 4 | ;* SPDX-License-Identifier: BSD-2-Clause-Patent
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| 5 | ;*
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| 6 | ;* CpuAsm.asm
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| 7 | ;*
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| 8 | ;* Abstract:
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| 9 | ;*
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| 10 | ;------------------------------------------------------------------------------
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| 11 |
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| 12 | #include <Base.h>
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| 13 |
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| 14 | DEFAULT REL
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| 15 | SECTION .text
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| 16 |
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| 17 | extern ASM_PFX(SecCoreStartupWithStack)
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| 18 |
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| 19 | ;
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| 20 | ; SecCore Entry Point
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| 21 | ;
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| 22 | ; Processor is in flat protected mode
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| 23 | ;
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| 24 | ; @param[in] RAX Initial value of the EAX register (BIST: Built-in Self Test)
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| 25 | ; @param[in] DI 'BP': boot-strap processor, or 'AP': application processor
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| 26 | ; @param[in] RBP Pointer to the start of the Boot Firmware Volume
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| 27 | ; @param[in] DS Selector allowing flat access to all addresses
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| 28 | ; @param[in] ES Selector allowing flat access to all addresses
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| 29 | ; @param[in] FS Selector allowing flat access to all addresses
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| 30 | ; @param[in] GS Selector allowing flat access to all addresses
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| 31 | ; @param[in] SS Selector allowing flat access to all addresses
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| 32 | ;
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| 33 | ; @return None This routine does not return
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| 34 | ;
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| 35 | global ASM_PFX(_ModuleEntryPoint)
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| 36 | ASM_PFX(_ModuleEntryPoint):
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| 37 |
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| 38 | ;
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| 39 | ; Fill the temporary RAM with the initial stack value.
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| 40 | ; The loop below will seed the heap as well, but that's harmless.
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| 41 | ;
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| 42 | mov rax, (FixedPcdGet32 (PcdInitValueInTempStack) << 32) | FixedPcdGet32 (PcdInitValueInTempStack)
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| 43 | ; qword to store
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| 44 | mov rdi, FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) ; base address,
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| 45 | ; relative to
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| 46 | ; ES
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| 47 | mov rcx, FixedPcdGet32 (PcdOvmfSecPeiTempRamSize) / 8 ; qword count
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| 48 | cld ; store from base
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| 49 | ; up
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| 50 | rep stosq
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| 51 |
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| 52 | ;
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| 53 | ; Load temporary RAM stack based on PCDs
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| 54 | ;
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| 55 | %define SEC_TOP_OF_STACK (FixedPcdGet32 (PcdOvmfSecPeiTempRamBase) + \
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| 56 | FixedPcdGet32 (PcdOvmfSecPeiTempRamSize))
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| 57 | mov rsp, SEC_TOP_OF_STACK
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| 58 | nop
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| 59 |
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| 60 | ;
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| 61 | ; Setup parameters and call SecCoreStartupWithStack
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| 62 | ; rcx: BootFirmwareVolumePtr
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| 63 | ; rdx: TopOfCurrentStack
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| 64 | ;
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| 65 | mov rcx, rbp
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| 66 | mov rdx, rsp
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| 67 | sub rsp, 0x20
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| 68 | call ASM_PFX(SecCoreStartupWithStack)
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| 69 |
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