1 /*
2  * Copyright (c) 2011 The Chromium OS Authors.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 /* Taken from Linux kernel, commit f56c3196 */
8 
9 #ifndef _ASM_GENERIC_SECTIONS_H_
10 #define _ASM_GENERIC_SECTIONS_H_
11 
12 /* References to section boundaries */
13 
14 extern char _text[], _stext[], _etext[];
15 extern char _data[], _sdata[], _edata[];
16 extern char __bss_start[], __bss_stop[];
17 extern char __init_begin[], __init_end[];
18 extern char _sinittext[], _einittext[];
19 extern char _end[], _init[];
20 extern char __per_cpu_load[], __per_cpu_start[], __per_cpu_end[];
21 extern char __kprobes_text_start[], __kprobes_text_end[];
22 extern char __entry_text_start[], __entry_text_end[];
23 extern char __initdata_begin[], __initdata_end[];
24 extern char __start_rodata[], __end_rodata[];
25 
26 /* Start and end of .ctors section - used for constructor calls. */
27 extern char __ctors_start[], __ctors_end[];
28 
29 /* function descriptor handling (if any).  Override
30  * in asm/sections.h */
31 #ifndef dereference_function_descriptor
32 #define dereference_function_descriptor(p) (p)
33 #endif
34 
35 /* random extra sections (if any).  Override
36  * in asm/sections.h */
37 #ifndef arch_is_kernel_text
38 static inline int arch_is_kernel_text(unsigned long addr)
39 {
40 	return 0;
41 }
42 #endif
43 
44 #ifndef arch_is_kernel_data
45 static inline int arch_is_kernel_data(unsigned long addr)
46 {
47 	return 0;
48 }
49 #endif
50 
51 /* U-Boot-specific things begin here */
52 
53 /* Start of U-Boot text region */
54 extern char __text_start[];
55 
56 /* This marks the end of the text region which must be relocated */
57 extern char __image_copy_end[];
58 
59 /*
60  * This is the U-Boot entry point - prior to relocation it should be same
61  * as __text_start
62  */
63 extern void _start(void);
64 
65 /*
66  * ARM needs to use offsets for symbols, since the values of some symbols
67  * are not resolved prior to relocation (and are just 0). Maybe this can be
68  * resolved, or maybe other architectures are similar, iwc this should be
69  * promoted to an architecture option.
70  */
71 #ifdef CONFIG_ARM
72 #define CONFIG_SYS_SYM_OFFSETS
73 #endif
74 
75 #ifdef CONFIG_SYS_SYM_OFFSETS
76 /* Start/end of the relocation entries, as an offset from _start */
77 extern ulong _rel_dyn_start_ofs;
78 extern ulong _rel_dyn_end_ofs;
79 
80 /* End of the region to be relocated, as an offset form _start */
81 extern ulong _image_copy_end_ofs;
82 
83 extern ulong _bss_start_ofs;	/* BSS start relative to _start */
84 extern ulong _bss_end_ofs;		/* BSS end relative to _start */
85 extern ulong _end_ofs;		/* end of image relative to _start */
86 
87 extern ulong _TEXT_BASE;	/* code start */
88 
89 #else /* don't use offsets: */
90 
91 /* Exports from the Linker Script */
92 extern ulong __data_end;
93 extern ulong __rel_dyn_start;
94 extern ulong __rel_dyn_end;
95 extern ulong __bss_end;
96 
97 extern ulong _TEXT_BASE;	/* code start */
98 
99 #endif
100 
101 #endif /* _ASM_GENERIC_SECTIONS_H_ */
102