mirror of https://github.com/acidanthera/audk.git
66 lines
1.9 KiB
ArmAsm
66 lines
1.9 KiB
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2015, 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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# Abstract:
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#
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# Provide FSP helper function.
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#
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#------------------------------------------------------------------------------
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#
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# FspInfoHeaderRelativeOff is patched during build process and initialized to offset of the AsmGetFspBaseAddress
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# from the FSP Info header.
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#
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ASM_GLOBAL ASM_PFX(FspInfoHeaderRelativeOff)
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ASM_PFX(FspInfoHeaderRelativeOff):
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#
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# This value will be pached by the build script
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#
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.long 0x012345678
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#
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# Returns FSP Base Address.
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#
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# This function gets the FSP Info Header using relative addressing and returns the FSP Base from the header structure
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#
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ASM_GLOBAL ASM_PFX(AsmGetFspBaseAddress)
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ASM_PFX(AsmGetFspBaseAddress):
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mov $AsmGetFspBaseAddress, %eax
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sub FspInfoHeaderRelativeOff, %eax
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add $0x01C, %eax
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mov (%eax), %eax
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ret
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#
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# No stack counter part of AsmGetFspBaseAddress. Return address is in edi.
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#
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ASM_GLOBAL ASM_PFX(AsmGetFspBaseAddressNoStack)
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ASM_PFX(AsmGetFspBaseAddressNoStack):
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mov $AsmGetFspBaseAddress, %eax
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sub FspInfoHeaderRelativeOff, %eax
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add $0x01C, %eax
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mov (%eax), %eax
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jmp *%edi
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#
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# Returns FSP Info Header.
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#
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# This function gets the FSP Info Header using relative addressing and returns it
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#
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ASM_GLOBAL ASM_PFX(AsmGetFspInfoHeader)
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ASM_PFX(AsmGetFspInfoHeader):
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mov $AsmGetFspBaseAddress, %eax
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sub FspInfoHeaderRelativeOff, %eax
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ret
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#
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# No stack counter part of AsmGetFspInfoHeader. Return address is in edi.
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#
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ASM_GLOBAL ASM_PFX(AsmGetFspInfoHeaderNoStack)
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ASM_PFX(AsmGetFspInfoHeaderNoStack):
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mov $AsmGetFspBaseAddress, %eax
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sub FspInfoHeaderRelativeOff, %eax
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jmp *%edi
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