xref: /openbmc/linux/arch/xtensa/kernel/vmlinux.lds.S (revision 87c2ce3b) 
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#include <linux/config.h>
20#define _NOCLANGUAGE
21#include <xtensa/config/core.h>
22#include <xtensa/config/system.h>
23OUTPUT_ARCH(xtensa)
24ENTRY(_start)
25
26#if XCHAL_MEMORY_ORDER == XTHAL_BIGENDIAN
27jiffies = jiffies_64 + 4;
28#else
29jiffies = jiffies_64;
30#endif
31
32#define KERNELOFFSET 0x1000
33
34/* Note: In the following macros, it would be nice to specify only the
35   vector name and section kind and construct "sym" and "section" using
36   CPP concatenation, but that does not work reliably.  Concatenating a
37   string with "." produces an invalid token.  CPP will not print a
38   warning because it thinks this is an assembly file, but it leaves
39   them as multiple tokens and there may or may not be whitespace
40   between them.  */
41
42/* Macro for a relocation entry */
43
44#define RELOCATE_ENTRY(sym, section)		\
45	LONG(sym ## _start);			\
46	LONG(sym ## _end);			\
47	LONG(LOADADDR(section))
48
49/* Macro to define a section for a vector.
50 *
51 * Use of the MIN function catches the types of errors illustrated in
52 * the following example:
53 *
54 * Assume the section .DoubleExceptionVector.literal is completely
55 * full.  Then a programmer adds code to .DoubleExceptionVector.text
56 * that produces another literal.  The final literal position will
57 * overlay onto the first word of the adjacent code section
58 * .DoubleExceptionVector.text.  (In practice, the literals will
59 * overwrite the code, and the first few instructions will be
60 * garbage.)
61 */
62
63#define SECTION_VECTOR(sym, section, addr, max_prevsec_size, prevsec)       \
64  section addr : AT((MIN(LOADADDR(prevsec) + max_prevsec_size,		    \
65		         LOADADDR(prevsec) + SIZEOF(prevsec)) + 3) & ~ 3)   \
66  {									    \
67    . = ALIGN(4);							    \
68    sym ## _start = ABSOLUTE(.);		 			    \
69    *(section)								    \
70    sym ## _end = ABSOLUTE(.);						    \
71  }
72
73/*
74 *  Mapping of input sections to output sections when linking.
75 */
76
77SECTIONS
78{
79  . = XCHAL_KSEG_CACHED_VADDR + KERNELOFFSET;
80  /* .text section */
81
82  _text = .;
83  _stext = .;
84  _ftext = .;
85
86  .text :
87  {
88    /* The .head.text section must be the first section! */
89    *(.head.text)
90    *(.literal .text)
91    *(.srom.text)
92    VMLINUX_SYMBOL(__sched_text_start) = .;
93    *(.sched.literal .sched.text)
94    VMLINUX_SYMBOL(__sched_text_end) = .;
95    VMLINUX_SYMBOL(__lock_text_start) = .;
96    *(.spinlock.literal .spinlock.text)
97    VMLINUX_SYMBOL(__lock_text_end) = .;
98
99  }
100  _etext = .;
101
102  . = ALIGN(16);
103
104  RODATA
105
106  /*  Relocation table */
107
108  . = ALIGN(16);
109  __boot_reloc_table_start = ABSOLUTE(.);
110
111  __relocate : {
112
113    RELOCATE_ENTRY(_WindowVectors_text,
114		   .WindowVectors.text);
115#if 0
116    RELOCATE_ENTRY(_KernelExceptionVector_literal,
117		   .KernelExceptionVector.literal);
118#endif
119    RELOCATE_ENTRY(_KernelExceptionVector_text,
120		   .KernelExceptionVector.text);
121#if 0
122    RELOCATE_ENTRY(_UserExceptionVector_literal,
123		   .UserExceptionVector.literal);
124#endif
125    RELOCATE_ENTRY(_UserExceptionVector_text,
126		   .UserExceptionVector.text);
127    RELOCATE_ENTRY(_DoubleExceptionVector_literal,
128		   .DoubleExceptionVector.literal);
129    RELOCATE_ENTRY(_DoubleExceptionVector_text,
130		   .DoubleExceptionVector.text);
131  }
132  __boot_reloc_table_end = ABSOLUTE(.) ;
133
134  .fixup   : { *(.fixup) }
135
136  . = ALIGN(16);
137
138  __ex_table : {
139    __start___ex_table = .;
140    *(__ex_table)
141    __stop___ex_table = .;
142  }
143
144  /* Data section */
145
146  . = ALIGN(XCHAL_ICACHE_LINESIZE);
147  _fdata = .;
148  .data :
149  {
150    *(.data) CONSTRUCTORS
151    . = ALIGN(XCHAL_ICACHE_LINESIZE);
152    *(.data.cacheline_aligned)
153  }
154
155  _edata = .;
156
157  /* The initial task */
158  . = ALIGN(8192);
159  .data.init_task : { *(.data.init_task) }
160
161  /* Initialization code and data: */
162
163  . = ALIGN(1<<XCHAL_MMU_MIN_PTE_PAGE_SIZE);
164  __init_begin = .;
165  .init.text : {
166  	_sinittext = .;
167	*(.init.literal) *(.init.text)
168	_einittext = .;
169  }
170
171  .init.data :
172  {
173    *(.init.data)
174    . = ALIGN(0x4);
175    __tagtable_begin = .;
176    *(.taglist)
177    __tagtable_end = .;
178  }
179
180  . = ALIGN(XCHAL_ICACHE_LINESIZE);
181
182  __setup_start = .;
183  .init.setup : { *(.init.setup) }
184  __setup_end = .;
185
186  __initcall_start = .;
187  .initcall.init : {
188  	*(.initcall1.init)
189  	*(.initcall2.init)
190  	*(.initcall3.init)
191  	*(.initcall4.init)
192  	*(.initcall5.init)
193  	*(.initcall6.init)
194  	*(.initcall7.init)
195  }
196  __initcall_end = .;
197
198  __con_initcall_start = .;
199  .con_initcall.init : { *(.con_initcall.init) }
200  __con_initcall_end = .;
201
202  SECURITY_INIT
203
204  . = ALIGN(4);
205
206  __start___ftr_fixup = .;
207  __ftr_fixup : { *(__ftr_fixup) }
208  __stop___ftr_fixup = .;
209
210  . = ALIGN(32);
211  __per_cpu_start = .;
212  .data.percpu  : { *(.data.percpu) }
213  __per_cpu_end = .;
214
215  . = ALIGN(4096);
216  __initramfs_start =.;
217  .init.ramfs : { *(.init.ramfs) }
218  __initramfs_end = .;
219
220  /* We need this dummy segment here */
221
222  . = ALIGN(4);
223  .dummy : { LONG(0) }
224
225  /* The vectors are relocated to the real position at startup time */
226
227  SECTION_VECTOR (_WindowVectors_text,
228		  .WindowVectors.text,
229		  XCHAL_WINDOW_VECTORS_VADDR, 4,
230		  .dummy)
231  SECTION_VECTOR (_DebugInterruptVector_literal,
232		  .DebugInterruptVector.literal,
233		  XCHAL_INTLEVEL_VECTOR_VADDR(XCHAL_DEBUGLEVEL) - 4,
234		  SIZEOF(.WindowVectors.text),
235		  .WindowVectors.text)
236  SECTION_VECTOR (_DebugInterruptVector_text,
237		  .DebugInterruptVector.text,
238		  XCHAL_INTLEVEL_VECTOR_VADDR(XCHAL_DEBUGLEVEL),
239		  4,
240		  .DebugInterruptVector.literal)
241  SECTION_VECTOR (_KernelExceptionVector_literal,
242		  .KernelExceptionVector.literal,
243		  XCHAL_KERNELEXC_VECTOR_VADDR - 4,
244		  SIZEOF(.DebugInterruptVector.text),
245		  .DebugInterruptVector.text)
246  SECTION_VECTOR (_KernelExceptionVector_text,
247		  .KernelExceptionVector.text,
248		  XCHAL_KERNELEXC_VECTOR_VADDR,
249		  4,
250		  .KernelExceptionVector.literal)
251  SECTION_VECTOR (_UserExceptionVector_literal,
252		  .UserExceptionVector.literal,
253		  XCHAL_USEREXC_VECTOR_VADDR - 4,
254		  SIZEOF(.KernelExceptionVector.text),
255		  .KernelExceptionVector.text)
256  SECTION_VECTOR (_UserExceptionVector_text,
257		  .UserExceptionVector.text,
258		  XCHAL_USEREXC_VECTOR_VADDR,
259		  4,
260		  .UserExceptionVector.literal)
261  SECTION_VECTOR (_DoubleExceptionVector_literal,
262		  .DoubleExceptionVector.literal,
263		  XCHAL_DOUBLEEXC_VECTOR_VADDR - 16,
264		  SIZEOF(.UserExceptionVector.text),
265		  .UserExceptionVector.text)
266  SECTION_VECTOR (_DoubleExceptionVector_text,
267		  .DoubleExceptionVector.text,
268		  XCHAL_DOUBLEEXC_VECTOR_VADDR,
269		  32,
270		  .DoubleExceptionVector.literal)
271
272  . = (LOADADDR( .DoubleExceptionVector.text ) + SIZEOF( .DoubleExceptionVector.text ) + 3) & ~ 3;
273  . = ALIGN(1<<XCHAL_MMU_MIN_PTE_PAGE_SIZE);
274
275  __init_end = .;
276
277  . = ALIGN(8192);
278
279  /* BSS section */
280  _bss_start = .;
281  .sbss : { *(.sbss) *(.scommon) }
282  .bss : { *(COMMON) *(.bss) }
283  _bss_end = .;
284  _end = .;
285
286  /* only used by the boot loader  */
287
288  . = ALIGN(0x10);
289  .bootstrap : { *(.bootstrap.literal .bootstrap.text .bootstrap.data) }
290
291  . = ALIGN(0x1000);
292  __initrd_start = .;
293  .initrd : { *(.initrd) }
294  __initrd_end = .;
295
296  .ResetVector.text XCHAL_RESET_VECTOR_VADDR :
297  {
298    *(.ResetVector.text)
299  }
300
301
302  /* Sections to be discarded */
303  /DISCARD/ :
304  {
305        *(.text.exit)
306	*(.text.exit.literal)
307        *(.data.exit)
308        *(.exitcall.exit)
309  }
310
311
312  .debug  0 :  { *(.debug) }
313  .line  0 :  { *(.line) }
314  .debug_srcinfo  0 :  { *(.debug_srcinfo) }
315  .debug_sfnames  0 :  { *(.debug_sfnames) }
316  .debug_aranges  0 :  { *(.debug_aranges) }
317  .debug_pubnames  0 :  { *(.debug_pubnames) }
318  .debug_info  0 :  { *(.debug_info) }
319  .debug_abbrev  0 :  { *(.debug_abbrev) }
320  .debug_line  0 :  { *(.debug_line) }
321  .debug_frame  0 :  { *(.debug_frame) }
322  .debug_str  0 :  { *(.debug_str) }
323  .debug_loc  0 :  { *(.debug_loc) }
324  .debug_macinfo  0 :  { *(.debug_macinfo) }
325  .debug_weaknames  0 :  { *(.debug_weaknames) }
326  .debug_funcnames  0 :  { *(.debug_funcnames) }
327  .debug_typenames  0 :  { *(.debug_typenames) }
328  .debug_varnames  0 :  { *(.debug_varnames) }
329
330  .xt.insn 0 :
331  {
332    *(.xt.insn)
333    *(.gnu.linkonce.x*)
334  }
335
336  .xt.lit 0 :
337  {
338    *(.xt.lit)
339    *(.gnu.linkonce.p*)
340  }
341}
342