projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 18652864 SG |
1 | /* |
| 2 | * Copyright (c) 2011 The Chromium OS Authors. | |
| 3 | * | |
| 4 | * This program is free software; you can redistribute it and/or | |
| 5 | * modify it under the terms of the GNU General Public License as | |
| 6 | * published by the Free Software Foundation; either version 2 of | |
| 7 | * the License, or (at your option) any later version. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write to the Free Software | |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, | |
| 17 | * MA 02111-1307 USA | |
| 18 | */ | |
| 19 | ||
| 20 | /* Taken from Linux kernel, commit f56c3196 */ | |
| 21 | ||
| 22 | #ifndef _ASM_GENERIC_SECTIONS_H_ | |
| 23 | #define _ASM_GENERIC_SECTIONS_H_ | |
| 24 | ||
| 25 | /* References to section boundaries */ | |
| 26 | ||
| 27 | extern char _text[], _stext[], _etext[]; | |
| 28 | extern char _data[], _sdata[], _edata[]; | |
| 29 | extern char __bss_start[], __bss_stop[]; | |
| 30 | extern char __init_begin[], __init_end[]; | |
| 31 | extern char _sinittext[], _einittext[]; | |
| a733b06b | 32 | extern char _end[], _init[]; |
| 18652864 SG |
33 | extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[]; |
| 34 | extern char __kprobes_text_start[], __kprobes_text_end[]; | |
| 35 | extern char __entry_text_start[], __entry_text_end[]; | |
| 36 | extern char __initdata_begin[], __initdata_end[]; | |
| 37 | extern char __start_rodata[], __end_rodata[]; | |
| 38 | ||
| 39 | /* Start and end of .ctors section - used for constructor calls. */ | |
| 40 | extern char __ctors_start[], __ctors_end[]; | |
| 41 | ||
| 42 | /* function descriptor handling (if any). Override | |
| 43 | * in asm/sections.h */ | |
| 44 | #ifndef dereference_function_descriptor | |
| 45 | #define dereference_function_descriptor(p) (p) | |
| 46 | #endif | |
| 47 | ||
| 48 | /* random extra sections (if any). Override | |
| 49 | * in asm/sections.h */ | |
| 50 | #ifndef arch_is_kernel_text | |
| 51 | static inline int arch_is_kernel_text(unsigned long addr) | |
| 52 | { | |
| 53 | return 0; | |
| 54 | } | |
| 55 | #endif | |
| 56 | ||
| 57 | #ifndef arch_is_kernel_data | |
| 58 | static inline int arch_is_kernel_data(unsigned long addr) | |
| 59 | { | |
| 60 | return 0; | |
| 61 | } | |
| 62 | #endif | |
| 63 | ||
| 64 | /* U-Boot-specific things begin here */ | |
| 65 | ||
| 66 | /* Start of U-Boot text region */ | |
| 67 | extern char __text_start[]; | |
| 68 | ||
| 69 | /* This marks the end of the text region which must be relocated */ | |
| 70 | extern char __image_copy_end[]; | |
| 71 | ||
| 72 | /* | |
| 73 | * This is the U-Boot entry point - prior to relocation it should be same | |
| 74 | * as __text_start | |
| 75 | */ | |
| 76 | extern void _start(void); | |
| 77 | ||
| 78 | /* | |
| 79 | * ARM needs to use offsets for symbols, since the values of some symbols | |
| 80 | * are not resolved prior to relocation (and are just 0). Maybe this can be | |
| 81 | * resolved, or maybe other architectures are similar, iwc this should be | |
| 82 | * promoted to an architecture option. | |
| 83 | */ | |
| 84 | #ifdef CONFIG_ARM | |
| 85 | #define CONFIG_SYS_SYM_OFFSETS | |
| 86 | #endif | |
| 87 | ||
| 88 | #ifdef CONFIG_SYS_SYM_OFFSETS | |
| 89 | /* Start/end of the relocation entries, as an offset from _start */ | |
| 90 | extern ulong _rel_dyn_start_ofs; | |
| 91 | extern ulong _rel_dyn_end_ofs; | |
| 92 | ||
| 93 | /* Start/end of the relocation symbol table, as an offset from _start */ | |
| 94 | extern ulong _dynsym_start_ofs; | |
| 95 | ||
| 96 | /* End of the region to be relocated, as an offset form _start */ | |
| 97 | extern ulong _image_copy_end_ofs; | |
| 98 | ||
| 99 | extern ulong _bss_start_ofs; /* BSS start relative to _start */ | |
| 100 | extern ulong _bss_end_ofs; /* BSS end relative to _start */ | |
| 101 | extern ulong _end_ofs; /* end of image relative to _start */ | |
| 102 | ||
| 103 | extern ulong _TEXT_BASE; /* code start */ | |
| 104 | ||
| 105 | #else /* don't use offsets: */ | |
| 106 | ||
| 107 | /* Exports from the Linker Script */ | |
| 108 | extern ulong __data_end; | |
| 109 | extern ulong __rel_dyn_start; | |
| 110 | extern ulong __rel_dyn_end; | |
| 111 | extern ulong __bss_end; | |
| 112 | ||
| 113 | extern ulong _TEXT_BASE; /* code start */ | |
| 114 | ||
| 115 | #endif | |
| 116 | ||
| 117 | #endif /* _ASM_GENERIC_SECTIONS_H_ */ |