Gitiles
Code Review Sign In
git01.mediatek.com / filogic / uboot / a9c87ba52c16917f8f41d8db9717e97acaa7d75a / . / arch / riscv / lib / crt0_riscv_efi.S
blob: b7b5329e1f788dd51d477825b43c7eac4aadbc69 [file] [log] [blame]
Rick Chen9dbb9732018-05-29 14:10:06 +0800[diff] [blame]1/* SPDX-License-Identifier: GPL-2.0+ */
Alexander Graf31bdde92018-04-23 07:59:45 +0200[diff] [blame]2/*
3 * crt0-efi-riscv.S - PE/COFF header for RISC-V EFI applications
4 *
5 * Copright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
6 * Copright (C) 2018 Alexander Graf <agraf@suse.de>
7 *
Alexander Graf31bdde92018-04-23 07:59:45 +0200[diff] [blame]8 * This file is inspired by arch/arm/lib/crt0_aarch64_efi.S
9 */
10
11#include <asm-generic/pe.h>
12
13#if __riscv_xlen == 64
14#define SIZE_LONG 8
15#define SAVE_LONG(reg, idx) sd reg, (idx*SIZE_LONG)(sp)
16#define LOAD_LONG(reg, idx) ld reg, (idx*SIZE_LONG)(sp)
17#define PE_MACHINE 0x5064
18#else
19#define SIZE_LONG 4
20#define SAVE_LONG(reg, idx) sw reg, (idx*SIZE_LONG)(sp)
21#define LOAD_LONG(reg, idx) lw reg, (idx*SIZE_LONG)(sp)
22#define PE_MACHINE 0x5032
23#endif
24
25
26 .section .text.head
27
28 /*
29 * Magic "MZ" signature for PE/COFF
30 */
31 .globl ImageBase
32ImageBase:
33 .ascii "MZ"
34 .skip 58 /* 'MZ' + pad + offset == 64 */
35 .long pe_header - ImageBase /* Offset to the PE header */
36pe_header:
37 .ascii "PE"
38 .short 0
39coff_header:
40 .short PE_MACHINE /* RISC-V 64/32-bit */
41 .short 2 /* nr_sections */
42 .long 0 /* TimeDateStamp */
43 .long 0 /* PointerToSymbolTable */
Bin Meng53548882018-10-02 07:39:34 -0700[diff] [blame]44 .long 0 /* NumberOfSymbols */
Alexander Graf31bdde92018-04-23 07:59:45 +0200[diff] [blame]45 .short section_table - optional_header /* SizeOfOptionalHeader */
Bin Meng53548882018-10-02 07:39:34 -0700[diff] [blame]46 /* Characteristics */
47 .short (IMAGE_FILE_EXECUTABLE_IMAGE | \
48 IMAGE_FILE_LINE_NUMS_STRIPPED | \
49 IMAGE_FILE_LOCAL_SYMS_STRIPPED | \
50 IMAGE_FILE_DEBUG_STRIPPED)
Alexander Graf31bdde92018-04-23 07:59:45 +0200[diff] [blame]51optional_header:
52 .short 0x20b /* PE32+ format */
53 .byte 0x02 /* MajorLinkerVersion */
54 .byte 0x14 /* MinorLinkerVersion */
55 .long _edata - _start /* SizeOfCode */
56 .long 0 /* SizeOfInitializedData */
57 .long 0 /* SizeOfUninitializedData */
58 .long _start - ImageBase /* AddressOfEntryPoint */
59 .long _start - ImageBase /* BaseOfCode */
60
61extra_header_fields:
62 .quad 0 /* ImageBase */
63 .long 0x20 /* SectionAlignment */
64 .long 0x8 /* FileAlignment */
65 .short 0 /* MajorOperatingSystemVersion */
66 .short 0 /* MinorOperatingSystemVersion */
67 .short 0 /* MajorImageVersion */
68 .short 0 /* MinorImageVersion */
69 .short 0 /* MajorSubsystemVersion */
70 .short 0 /* MinorSubsystemVersion */
71 .long 0 /* Win32VersionValue */
72
73 .long _edata - ImageBase /* SizeOfImage */
74
75 /*
76 * Everything before the kernel image is considered part of the header
77 */
78 .long _start - ImageBase /* SizeOfHeaders */
79 .long 0 /* CheckSum */
80 .short IMAGE_SUBSYSTEM_EFI_APPLICATION /* Subsystem */
81 .short 0 /* DllCharacteristics */
82 .quad 0 /* SizeOfStackReserve */
83 .quad 0 /* SizeOfStackCommit */
84 .quad 0 /* SizeOfHeapReserve */
85 .quad 0 /* SizeOfHeapCommit */
86 .long 0 /* LoaderFlags */
87 .long 0x6 /* NumberOfRvaAndSizes */
88
89 .quad 0 /* ExportTable */
90 .quad 0 /* ImportTable */
91 .quad 0 /* ResourceTable */
92 .quad 0 /* ExceptionTable */
93 .quad 0 /* CertificationTable */
94 .quad 0 /* BaseRelocationTable */
95
96 /* Section table */
97section_table:
98
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"
105 .byte 0
106 .byte 0 /* end of 0 padding of section name */
107 .long 0
108 .long 0
109 .long 0 /* SizeOfRawData */
110 .long 0 /* PointerToRawData */
111 .long 0 /* PointerToRelocations */
112 .long 0 /* PointerToLineNumbers */
113 .short 0 /* NumberOfRelocations */
114 .short 0 /* NumberOfLineNumbers */
115 .long 0x42100040 /* Characteristics (section flags) */
116
117
118 .ascii ".text"
119 .byte 0
120 .byte 0
121 .byte 0 /* end of 0 padding of section name */
122 .long _edata - _start /* VirtualSize */
123 .long _start - ImageBase /* VirtualAddress */
124 .long _edata - _start /* SizeOfRawData */
125 .long _start - ImageBase /* PointerToRawData */
126
127 .long 0 /* PointerToRelocations (0 for executables) */
128 .long 0 /* PointerToLineNumbers (0 for executables) */
129 .short 0 /* NumberOfRelocations (0 for executables) */
130 .short 0 /* NumberOfLineNumbers (0 for executables) */
131 .long 0xe0500020 /* Characteristics (section flags) */
132
133_start:
134 addi sp, sp, -(SIZE_LONG * 3)
135 SAVE_LONG(a0, 0)
136 SAVE_LONG(a1, 1)
137 SAVE_LONG(ra, 2)
138
139 lla a0, ImageBase
140 lla a1, _DYNAMIC
141 call _relocate
142 bne a0, zero, 0f
143
144 LOAD_LONG(a1, 1)
145 LOAD_LONG(a0, 0)
146 call efi_main
147
148 LOAD_LONG(ra, 2)
149
1500: addi sp, sp, (SIZE_LONG * 3)
151 ret