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 AR_CLASS(	mov	r0, r0		)
21  M_CLASS(	nop.w			)
22#endif
23		.endm
24
25		.macro	__EFI_HEADER
26#ifdef CONFIG_EFI_STUB
27		.set	start_offset, __efi_start - start
28		.org	start + 0x3c
29		@
30		@ The PE header can be anywhere in the file, but for
31		@ simplicity we keep it together with the MSDOS header
32		@ The offset to the PE/COFF header needs to be at offset
33		@ 0x3C in the MSDOS header.
34		@ The only 2 fields of the MSDOS header that are used are this
35		@ PE/COFF offset, and the "MZ" bytes at offset 0x0.
36		@
37		.long	pe_header - start	@ Offset to the PE header.
38
39pe_header:
40		.ascii	"PE\0\0"
41
42coff_header:
43		.short	0x01c2			@ ARM or Thumb
44		.short	2			@ nr_sections
45		.long	0 			@ TimeDateStamp
46		.long	0			@ PointerToSymbolTable
47		.long	1			@ NumberOfSymbols
48		.short	section_table - optional_header
49						@ SizeOfOptionalHeader
50		.short	0x306			@ Characteristics.
51						@ IMAGE_FILE_32BIT_MACHINE |
52						@ IMAGE_FILE_DEBUG_STRIPPED |
53						@ IMAGE_FILE_EXECUTABLE_IMAGE |
54						@ IMAGE_FILE_LINE_NUMS_STRIPPED
55
56optional_header:
57		.short	0x10b			@ PE32 format
58		.byte	0x02			@ MajorLinkerVersion
59		.byte	0x14			@ MinorLinkerVersion
60		.long	_end - __efi_start	@ SizeOfCode
61		.long	0			@ SizeOfInitializedData
62		.long	0			@ SizeOfUninitializedData
63		.long	efi_stub_entry - start	@ AddressOfEntryPoint
64		.long	start_offset		@ BaseOfCode
65		.long	0			@ data
66
67extra_header_fields:
68		.long	0			@ ImageBase
69		.long	0x200			@ SectionAlignment
70		.long	0x200			@ FileAlignment
71		.short	0			@ MajorOperatingSystemVersion
72		.short	0			@ MinorOperatingSystemVersion
73		.short	0			@ MajorImageVersion
74		.short	0			@ MinorImageVersion
75		.short	0			@ MajorSubsystemVersion
76		.short	0			@ MinorSubsystemVersion
77		.long	0			@ Win32VersionValue
78
79		.long	_end - start		@ SizeOfImage
80		.long	start_offset		@ SizeOfHeaders
81		.long	0			@ CheckSum
82		.short	0xa			@ Subsystem (EFI application)
83		.short	0			@ DllCharacteristics
84		.long	0			@ SizeOfStackReserve
85		.long	0			@ SizeOfStackCommit
86		.long	0			@ SizeOfHeapReserve
87		.long	0			@ SizeOfHeapCommit
88		.long	0			@ LoaderFlags
89		.long	0x6			@ NumberOfRvaAndSizes
90
91		.quad	0			@ ExportTable
92		.quad	0			@ ImportTable
93		.quad	0			@ ResourceTable
94		.quad	0			@ ExceptionTable
95		.quad	0			@ CertificationTable
96		.quad	0			@ BaseRelocationTable
97
98section_table:
99		@
100		@ The EFI application loader requires a relocation section
101		@ because EFI applications must be relocatable. This is a
102		@ dummy section as far as we are concerned.
103		@
104		.ascii	".reloc\0\0"
105		.long	0			@ VirtualSize
106		.long	0			@ VirtualAddress
107		.long	0			@ SizeOfRawData
108		.long	0			@ PointerToRawData
109		.long	0			@ PointerToRelocations
110		.long	0			@ PointerToLineNumbers
111		.short	0			@ NumberOfRelocations
112		.short	0			@ NumberOfLineNumbers
113		.long	0x42100040		@ Characteristics
114
115		.ascii	".text\0\0\0"
116		.long	_end - __efi_start	@ VirtualSize
117		.long	__efi_start		@ VirtualAddress
118		.long	_edata - __efi_start	@ SizeOfRawData
119		.long	__efi_start		@ PointerToRawData
120		.long	0			@ PointerToRelocations
121		.long	0			@ PointerToLineNumbers
122		.short	0			@ NumberOfRelocations
123		.short	0			@ NumberOfLineNumbers
124		.long	0xe0500020		@ Characteristics
125
126		.align	9
127__efi_start:
128#endif
129		.endm
130