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
131