xref: /linux/arch/xtensa/kernel/vmlinux.lds.S (revision 606d099cdd1080bbb50ea50dc52d98252f8f10a1) 
1/*
2 * arch/xtensa/kernel/vmlinux.lds.S
3 *
4 * Xtensa linker script
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License.  See the file "COPYING" in the main directory of this archive
8 * for more details.
9 *
10 * Copyright (C) 2001 - 2005 Tensilica Inc.
11 *
12 * Chris Zankel <chris@zankel.net>
13 * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca>
14 * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com>
15 */
16
17#include <asm-generic/vmlinux.lds.h>
18
19#define _NOCLANGUAGE
20#include <xtensa/config/core.h>
21#include <xtensa/config/system.h>
22OUTPUT_ARCH(xtensa)
23ENTRY(_start)
24
25#if XCHAL_MEMORY_ORDER == XTHAL_BIGENDIAN
26jiffies = jiffies_64 + 4;
27#else
28jiffies = jiffies_64;
29#endif
30
31#define KERNELOFFSET 0x1000
32
33/* Note: In the following macros, it would be nice to specify only the
34   vector name and section kind and construct "sym" and "section" using
35   CPP concatenation, but that does not work reliably.  Concatenating a
36   string with "." produces an invalid token.  CPP will not print a
37   warning because it thinks this is an assembly file, but it leaves
38   them as multiple tokens and there may or may not be whitespace
39   between them.  */
40
41/* Macro for a relocation entry */
42
43#define RELOCATE_ENTRY(sym, section)		\
44	LONG(sym ## _start);			\
45	LONG(sym ## _end);			\
46	LONG(LOADADDR(section))
47
48/* Macro to define a section for a vector.
49 *
50 * Use of the MIN function catches the types of errors illustrated in
51 * the following example:
52 *
53 * Assume the section .DoubleExceptionVector.literal is completely
54 * full.  Then a programmer adds code to .DoubleExceptionVector.text
55 * that produces another literal.  The final literal position will
56 * overlay onto the first word of the adjacent code section
57 * .DoubleExceptionVector.text.  (In practice, the literals will
58 * overwrite the code, and the first few instructions will be
59 * garbage.)
60 */
61
62#define SECTION_VECTOR(sym, section, addr, max_prevsec_size, prevsec)       \
63  section addr : AT((MIN(LOADADDR(prevsec) + max_prevsec_size,		    \
64		         LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3)   \
65  {									    \
66    . = ALIGN(4);							    \
67    sym ## _start = ABSOLUTE(.);		 			    \
68    *(section)								    \
69    sym ## _end = ABSOLUTE(.);						    \
70  }
71
72/*
73 *  Mapping of input sections to output sections when linking.
74 */
75
76SECTIONS
77{
78  . = XCHAL_KSEG_CACHED_VADDR + KERNELOFFSET;
79  /* .text section */
80
81  _text = .;
82  _stext = .;
83  _ftext = .;
84
85  .text :
86  {
87    /* The .head.text section must be the first section! */
88    *(.head.text)
89    *(.literal .text)
90    *(.srom.text)
91    VMLINUX_SYMBOL(__sched_text_start) = .;
92    *(.sched.literal .sched.text)
93    VMLINUX_SYMBOL(__sched_text_end) = .;
94    VMLINUX_SYMBOL(__lock_text_start) = .;
95    *(.spinlock.literal .spinlock.text)
96    VMLINUX_SYMBOL(__lock_text_end) = .;
97
98  }
99  _etext = .;
100
101  . = ALIGN(16);
102
103  RODATA
104
105  /*  Relocation table */
106
107  . = ALIGN(16);
108  __boot_reloc_table_start = ABSOLUTE(.);
109
110  __relocate : {
111
112    RELOCATE_ENTRY(_WindowVectors_text,
113		   .WindowVectors.text);
114#if 0
115    RELOCATE_ENTRY(_KernelExceptionVector_literal,
116		   .KernelExceptionVector.literal);
117#endif
118    RELOCATE_ENTRY(_KernelExceptionVector_text,
119		   .KernelExceptionVector.text);
120#if 0
121    RELOCATE_ENTRY(_UserExceptionVector_literal,
122		   .UserExceptionVector.literal);
123#endif
124    RELOCATE_ENTRY(_UserExceptionVector_text,
125		   .UserExceptionVector.text);
126    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
127		   .DoubleExceptionVector.literal);
128    RELOCATE_ENTRY(_DoubleExceptionVector_text,
129		   .DoubleExceptionVector.text);
130  }
131  __boot_reloc_table_end = ABSOLUTE(.) ;
132
133  .fixup   : { *(.fixup) }
134
135  . = ALIGN(16);
136
137  __ex_table : {
138    __start___ex_table = .;
139    *(__ex_table)
140    __stop___ex_table = .;
141  }
142
143  /* Data section */
144
145  . = ALIGN(XCHAL_ICACHE_LINESIZE);
146  _fdata = .;
147  .data :
148  {
149    *(.data) CONSTRUCTORS
150    . = ALIGN(XCHAL_ICACHE_LINESIZE);
151    *(.data.cacheline_aligned)
152  }
153
154  _edata = .;
155
156  /* The initial task */
157  . = ALIGN(8192);
158  .data.init_task : { *(.data.init_task) }
159
160  /* Initialization code and data: */
161
162  . = ALIGN(1<<XCHAL_MMU_MIN_PTE_PAGE_SIZE);
163  __init_begin = .;
164  .init.text : {
165  	_sinittext = .;
166	*(.init.literal) *(.init.text)
167	_einittext = .;
168  }
169
170  .init.data :
171  {
172    *(.init.data)
173    . = ALIGN(0x4);
174    __tagtable_begin = .;
175    *(.taglist)
176    __tagtable_end = .;
177  }
178
179  . = ALIGN(XCHAL_ICACHE_LINESIZE);
180
181  __setup_start = .;
182  .init.setup : { *(.init.setup) }
183  __setup_end = .;
184
185  __initcall_start = .;
186  .initcall.init : {
187	INITCALLS
188  }
189  __initcall_end = .;
190
191  __con_initcall_start = .;
192  .con_initcall.init : { *(.con_initcall.init) }
193  __con_initcall_end = .;
194
195  SECURITY_INIT
196
197  . = ALIGN(4);
198
199  __start___ftr_fixup = .;
200  __ftr_fixup : { *(__ftr_fixup) }
201  __stop___ftr_fixup = .;
202
203  . = ALIGN(32);
204  __per_cpu_start = .;
205  .data.percpu  : { *(.data.percpu) }
206  __per_cpu_end = .;
207
208  . = ALIGN(4096);
209  __initramfs_start =.;
210  .init.ramfs : { *(.init.ramfs) }
211  __initramfs_end = .;
212
213  /* We need this dummy segment here */
214
215  . = ALIGN(4);
216  .dummy : { LONG(0) }
217
218  /* The vectors are relocated to the real position at startup time */
219
220  SECTION_VECTOR (_WindowVectors_text,
221		  .WindowVectors.text,
222		  XCHAL_WINDOW_VECTORS_VADDR, 4,
223		  .dummy)
224  SECTION_VECTOR (_DebugInterruptVector_literal,
225		  .DebugInterruptVector.literal,
226		  XCHAL_INTLEVEL_VECTOR_VADDR(XCHAL_DEBUGLEVEL) - 4,
227		  SIZEOF(.WindowVectors.text),
228		  .WindowVectors.text)
229  SECTION_VECTOR (_DebugInterruptVector_text,
230		  .DebugInterruptVector.text,
231		  XCHAL_INTLEVEL_VECTOR_VADDR(XCHAL_DEBUGLEVEL),
232		  4,
233		  .DebugInterruptVector.literal)
234  SECTION_VECTOR (_KernelExceptionVector_literal,
235		  .KernelExceptionVector.literal,
236		  XCHAL_KERNELEXC_VECTOR_VADDR - 4,
237		  SIZEOF(.DebugInterruptVector.text),
238		  .DebugInterruptVector.text)
239  SECTION_VECTOR (_KernelExceptionVector_text,
240		  .KernelExceptionVector.text,
241		  XCHAL_KERNELEXC_VECTOR_VADDR,
242		  4,
243		  .KernelExceptionVector.literal)
244  SECTION_VECTOR (_UserExceptionVector_literal,
245		  .UserExceptionVector.literal,
246		  XCHAL_USEREXC_VECTOR_VADDR - 4,
247		  SIZEOF(.KernelExceptionVector.text),
248		  .KernelExceptionVector.text)
249  SECTION_VECTOR (_UserExceptionVector_text,
250		  .UserExceptionVector.text,
251		  XCHAL_USEREXC_VECTOR_VADDR,
252		  4,
253		  .UserExceptionVector.literal)
254  SECTION_VECTOR (_DoubleExceptionVector_literal,
255		  .DoubleExceptionVector.literal,
256		  XCHAL_DOUBLEEXC_VECTOR_VADDR - 16,
257		  SIZEOF(.UserExceptionVector.text),
258		  .UserExceptionVector.text)
259  SECTION_VECTOR (_DoubleExceptionVector_text,
260		  .DoubleExceptionVector.text,
261		  XCHAL_DOUBLEEXC_VECTOR_VADDR,
262		  32,
263		  .DoubleExceptionVector.literal)
264
265  . = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3;
266  . = ALIGN(1<<XCHAL_MMU_MIN_PTE_PAGE_SIZE);
267
268  __init_end = .;
269
270  . = ALIGN(8192);
271
272  /* BSS section */
273  _bss_start = .;
274  .sbss : { *(.sbss) *(.scommon) }
275  .bss : { *(COMMON) *(.bss) }
276  _bss_end = .;
277  _end = .;
278
279  /* only used by the boot loader  */
280
281  . = ALIGN(0x10);
282  .bootstrap : { *(.bootstrap.literal .bootstrap.text .bootstrap.data) }
283
284  . = ALIGN(0x1000);
285  __initrd_start = .;
286  .initrd : { *(.initrd) }
287  __initrd_end = .;
288
289  .ResetVector.text XCHAL_RESET_VECTOR_VADDR :
290  {
291    *(.ResetVector.text)
292  }
293
294
295  /* Sections to be discarded */
296  /DISCARD/ :
297  {
298        *(.text.exit)
299	*(.text.exit.literal)
300        *(.data.exit)
301        *(.exitcall.exit)
302  }
303
304
305  .debug  0 :  { *(.debug) }
306  .line  0 :  { *(.line) }
307  .debug_srcinfo  0 :  { *(.debug_srcinfo) }
308  .debug_sfnames  0 :  { *(.debug_sfnames) }
309  .debug_aranges  0 :  { *(.debug_aranges) }
310  .debug_pubnames  0 :  { *(.debug_pubnames) }
311  .debug_info  0 :  { *(.debug_info) }
312  .debug_abbrev  0 :  { *(.debug_abbrev) }
313  .debug_line  0 :  { *(.debug_line) }
314  .debug_frame  0 :  { *(.debug_frame) }
315  .debug_str  0 :  { *(.debug_str) }
316  .debug_loc  0 :  { *(.debug_loc) }
317  .debug_macinfo  0 :  { *(.debug_macinfo) }
318  .debug_weaknames  0 :  { *(.debug_weaknames) }
319  .debug_funcnames  0 :  { *(.debug_funcnames) }
320  .debug_typenames  0 :  { *(.debug_typenames) }
321  .debug_varnames  0 :  { *(.debug_varnames) }
322
323  .xt.insn 0 :
324  {
325    *(.xt.insn)
326    *(.gnu.linkonce.x*)
327  }
328
329  .xt.lit 0 :
330  {
331    *(.xt.lit)
332    *(.gnu.linkonce.p*)
333  }
334}
335