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		W(mov)	r0, r0
21#endif
22		.endm
23
24		.macro	__EFI_HEADER
25#ifdef CONFIG_EFI_STUB
26		.set	start_offset, __efi_start - start
27		.org	start + 0x3c
28		@
29		@ The PE header can be anywhere in the file, but for
30		@ simplicity we keep it together with the MSDOS header
31		@ The offset to the PE/COFF header needs to be at offset
32		@ 0x3C in the MSDOS header.
33		@ The only 2 fields of the MSDOS header that are used are this
34		@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
35		@
36		.long	pe_header - start	@ Offset to the PE header.
37
38pe_header:
39		.ascii	"PE\0\0"
40
41coff_header:
42		.short	0x01c2			@ ARM or Thumb
43		.short	2			@ nr_sections
44		.long	0 			@ TimeDateStamp
45		.long	0			@ PointerToSymbolTable
46		.long	1			@ NumberOfSymbols
47		.short	section_table - optional_header
48						@ SizeOfOptionalHeader
49		.short	0x306			@ Characteristics.
50						@ IMAGE_FILE_32BIT_MACHINE |
51						@ IMAGE_FILE_DEBUG_STRIPPED |
52						@ IMAGE_FILE_EXECUTABLE_IMAGE |
53						@ IMAGE_FILE_LINE_NUMS_STRIPPED
54
55optional_header:
56		.short	0x10b			@ PE32 format
57		.byte	0x02			@ MajorLinkerVersion
58		.byte	0x14			@ MinorLinkerVersion
59		.long	_end - __efi_start	@ SizeOfCode
60		.long	0			@ SizeOfInitializedData
61		.long	0			@ SizeOfUninitializedData
62		.long	efi_stub_entry - start	@ AddressOfEntryPoint
63		.long	start_offset		@ BaseOfCode
64		.long	0			@ data
65
66extra_header_fields:
67		.long	0			@ ImageBase
68		.long	0x200			@ SectionAlignment
69		.long	0x200			@ FileAlignment
70		.short	0			@ MajorOperatingSystemVersion
71		.short	0			@ MinorOperatingSystemVersion
72		.short	0			@ MajorImageVersion
73		.short	0			@ MinorImageVersion
74		.short	0			@ MajorSubsystemVersion
75		.short	0			@ MinorSubsystemVersion
76		.long	0			@ Win32VersionValue
77
78		.long	_end - start		@ SizeOfImage
79		.long	start_offset		@ SizeOfHeaders
80		.long	0			@ CheckSum
81		.short	0xa			@ Subsystem (EFI application)
82		.short	0			@ DllCharacteristics
83		.long	0			@ SizeOfStackReserve
84		.long	0			@ SizeOfStackCommit
85		.long	0			@ SizeOfHeapReserve
86		.long	0			@ SizeOfHeapCommit
87		.long	0			@ LoaderFlags
88		.long	0x6			@ NumberOfRvaAndSizes
89
90		.quad	0			@ ExportTable
91		.quad	0			@ ImportTable
92		.quad	0			@ ResourceTable
93		.quad	0			@ ExceptionTable
94		.quad	0			@ CertificationTable
95		.quad	0			@ BaseRelocationTable
96
97section_table:
98		@
99		@ The EFI application loader requires a relocation section
100		@ because EFI applications must be relocatable. This is a
101		@ dummy section as far as we are concerned.
102		@
103		.ascii	".reloc\0\0"
104		.long	0			@ VirtualSize
105		.long	0			@ VirtualAddress
106		.long	0			@ SizeOfRawData
107		.long	0			@ PointerToRawData
108		.long	0			@ PointerToRelocations
109		.long	0			@ PointerToLineNumbers
110		.short	0			@ NumberOfRelocations
111		.short	0			@ NumberOfLineNumbers
112		.long	0x42100040		@ Characteristics
113
114		.ascii	".text\0\0\0"
115		.long	_end - __efi_start	@ VirtualSize
116		.long	__efi_start		@ VirtualAddress
117		.long	_edata - __efi_start	@ SizeOfRawData
118		.long	__efi_start		@ PointerToRawData
119		.long	0			@ PointerToRelocations
120		.long	0			@ PointerToLineNumbers
121		.short	0			@ NumberOfRelocations
122		.short	0			@ NumberOfLineNumbers
123		.long	0xe0500020		@ Characteristics
124
125		.align	9
126__efi_start:
127#endif
128		.endm
129