1/*
  2 * Copyright (C) 2013-2015 Linaro Ltd
  3 * Authors: Roy Franz <roy.franz@linaro.org>
  4 *          Ard Biesheuvel <ard.biesheuvel@linaro.org>
  5 *
  6 * This program is free software; you can redistribute it and/or modify
  7 * it under the terms of the GNU General Public License version 2 as
  8 * published by the Free Software Foundation.
  9 */
 10
 11		.macro	__nop
 12#ifdef CONFIG_EFI_STUB
 13		@ This is almost but not quite a NOP, since it does clobber the
 14		@ condition flags. But it is the best we can do for EFI, since
 15		@ PE/COFF expects the magic string "MZ" at offset 0, while the
 16		@ ARM/Linux boot protocol expects an executable instruction
 17		@ there.
 18		.inst	'M' | ('Z' << 8) | (0x1310 << 16)   @ tstne r0, #0x4d000
 19#else
 20		mov	r0, r0
 21#endif
 22		.endm
 23
 24		.macro	__EFI_HEADER
 25#ifdef CONFIG_EFI_STUB
 26		b	__efi_start
 27
 28		.set	start_offset, __efi_start - start
 29		.org	start + 0x3c
 30		@
 31		@ The PE header can be anywhere in the file, but for
 32		@ simplicity we keep it together with the MSDOS header
 33		@ The offset to the PE/COFF header needs to be at offset
 34		@ 0x3C in the MSDOS header.
 35		@ The only 2 fields of the MSDOS header that are used are this
 36		@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
 37		@
 38		.long	pe_header - start	@ Offset to the PE header.
 39
 40pe_header:
 41		.ascii	"PE\0\0"
 42
 43coff_header:
 44		.short	0x01c2			@ ARM or Thumb
 45		.short	2			@ nr_sections
 46		.long	0 			@ TimeDateStamp
 47		.long	0			@ PointerToSymbolTable
 48		.long	1			@ NumberOfSymbols
 49		.short	section_table - optional_header
 50						@ SizeOfOptionalHeader
 51		.short	0x306			@ Characteristics.
 52						@ IMAGE_FILE_32BIT_MACHINE |
 53						@ IMAGE_FILE_DEBUG_STRIPPED |
 54						@ IMAGE_FILE_EXECUTABLE_IMAGE |
 55						@ IMAGE_FILE_LINE_NUMS_STRIPPED
 56
 57optional_header:
 58		.short	0x10b			@ PE32 format
 59		.byte	0x02			@ MajorLinkerVersion
 60		.byte	0x14			@ MinorLinkerVersion
 61		.long	_end - __efi_start	@ SizeOfCode
 62		.long	0			@ SizeOfInitializedData
 63		.long	0			@ SizeOfUninitializedData
 64		.long	efi_stub_entry - start	@ AddressOfEntryPoint
 65		.long	start_offset		@ BaseOfCode
 66		.long	0			@ data
 67
 68extra_header_fields:
 69		.long	0			@ ImageBase
 70		.long	0x200			@ SectionAlignment
 71		.long	0x200			@ FileAlignment
 72		.short	0			@ MajorOperatingSystemVersion
 73		.short	0			@ MinorOperatingSystemVersion
 74		.short	0			@ MajorImageVersion
 75		.short	0			@ MinorImageVersion
 76		.short	0			@ MajorSubsystemVersion
 77		.short	0			@ MinorSubsystemVersion
 78		.long	0			@ Win32VersionValue
 79
 80		.long	_end - start		@ SizeOfImage
 81		.long	start_offset		@ SizeOfHeaders
 82		.long	0			@ CheckSum
 83		.short	0xa			@ Subsystem (EFI application)
 84		.short	0			@ DllCharacteristics
 85		.long	0			@ SizeOfStackReserve
 86		.long	0			@ SizeOfStackCommit
 87		.long	0			@ SizeOfHeapReserve
 88		.long	0			@ SizeOfHeapCommit
 89		.long	0			@ LoaderFlags
 90		.long	0x6			@ NumberOfRvaAndSizes
 91
 92		.quad	0			@ ExportTable
 93		.quad	0			@ ImportTable
 94		.quad	0			@ ResourceTable
 95		.quad	0			@ ExceptionTable
 96		.quad	0			@ CertificationTable
 97		.quad	0			@ BaseRelocationTable
 98
 99section_table:
100		@
101		@ The EFI application loader requires a relocation section
102		@ because EFI applications must be relocatable. This is a
103		@ dummy section as far as we are concerned.
104		@
105		.ascii	".reloc\0\0"
106		.long	0			@ VirtualSize
107		.long	0			@ VirtualAddress
108		.long	0			@ SizeOfRawData
109		.long	0			@ PointerToRawData
110		.long	0			@ PointerToRelocations
111		.long	0			@ PointerToLineNumbers
112		.short	0			@ NumberOfRelocations
113		.short	0			@ NumberOfLineNumbers
114		.long	0x42100040		@ Characteristics
115
116		.ascii	".text\0\0\0"
117		.long	_end - __efi_start	@ VirtualSize
118		.long	__efi_start		@ VirtualAddress
119		.long	_edata - __efi_start	@ SizeOfRawData
120		.long	__efi_start		@ PointerToRawData
121		.long	0			@ PointerToRelocations
122		.long	0			@ PointerToLineNumbers
123		.short	0			@ NumberOfRelocations
124		.short	0			@ NumberOfLineNumbers
125		.long	0xe0500020		@ Characteristics
126
127		.align	9
128__efi_start:
129#endif
130		.endm