Commit | Line | Data |
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1da177e4 LT |
1 | /* ld script to make ARM Linux kernel |
2 | * taken from the i386 version by Russell King | |
3 | * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz> | |
4 | */ | |
5 | ||
6 | #include <asm-generic/vmlinux.lds.h> | |
f0d5375e | 7 | #include <asm/cache.h> |
4f7a1812 | 8 | #include <asm/thread_info.h> |
37d07b72 | 9 | #include <asm/memory.h> |
f6430a93 | 10 | #include <asm/page.h> |
1e6b4811 KC |
11 | #ifdef CONFIG_ARM_KERNMEM_PERMS |
12 | #include <asm/pgtable.h> | |
13 | #endif | |
e60a1fec | 14 | |
5085f3ff | 15 | #define PROC_INFO \ |
b8b9987f | 16 | . = ALIGN(4); \ |
5085f3ff RK |
17 | VMLINUX_SYMBOL(__proc_info_begin) = .; \ |
18 | *(.proc.info.init) \ | |
19 | VMLINUX_SYMBOL(__proc_info_end) = .; | |
20 | ||
8903826d WD |
21 | #define IDMAP_TEXT \ |
22 | ALIGN_FUNCTION(); \ | |
23 | VMLINUX_SYMBOL(__idmap_text_start) = .; \ | |
24 | *(.idmap.text) \ | |
9e9a367c | 25 | VMLINUX_SYMBOL(__idmap_text_end) = .; \ |
a9fea8b3 | 26 | . = ALIGN(PAGE_SIZE); \ |
9e9a367c CD |
27 | VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ |
28 | *(.hyp.idmap.text) \ | |
29 | VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; | |
8903826d | 30 | |
5085f3ff RK |
31 | #ifdef CONFIG_HOTPLUG_CPU |
32 | #define ARM_CPU_DISCARD(x) | |
33 | #define ARM_CPU_KEEP(x) x | |
34 | #else | |
35 | #define ARM_CPU_DISCARD(x) x | |
36 | #define ARM_CPU_KEEP(x) | |
37 | #endif | |
38 | ||
87e040b6 SG |
39 | #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ |
40 | defined(CONFIG_GENERIC_BUG) | |
a9ad21fe | 41 | #define ARM_EXIT_KEEP(x) x |
6760b109 | 42 | #define ARM_EXIT_DISCARD(x) |
a9ad21fe RK |
43 | #else |
44 | #define ARM_EXIT_KEEP(x) | |
6760b109 | 45 | #define ARM_EXIT_DISCARD(x) x |
a9ad21fe RK |
46 | #endif |
47 | ||
1da177e4 LT |
48 | OUTPUT_ARCH(arm) |
49 | ENTRY(stext) | |
37d07b72 | 50 | |
1da177e4 LT |
51 | #ifndef __ARMEB__ |
52 | jiffies = jiffies_64; | |
53 | #else | |
54 | jiffies = jiffies_64 + 4; | |
55 | #endif | |
37d07b72 | 56 | |
9d4f13e5 RK |
57 | SECTIONS |
58 | { | |
39df8887 | 59 | /* |
6760b109 RK |
60 | * XXX: The linker does not define how output sections are |
61 | * assigned to input sections when there are multiple statements | |
62 | * matching the same input section name. There is no documented | |
63 | * order of matching. | |
64 | * | |
39df8887 RK |
65 | * unwind exit sections must be discarded before the rest of the |
66 | * unwind sections get included. | |
67 | */ | |
68 | /DISCARD/ : { | |
69 | *(.ARM.exidx.exit.text) | |
70 | *(.ARM.extab.exit.text) | |
71 | ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) | |
72 | ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) | |
6760b109 RK |
73 | ARM_EXIT_DISCARD(EXIT_TEXT) |
74 | ARM_EXIT_DISCARD(EXIT_DATA) | |
75 | EXIT_CALL | |
39df8887 | 76 | #ifndef CONFIG_MMU |
c4a84ae3 | 77 | *(.text.fixup) |
39df8887 RK |
78 | *(__ex_table) |
79 | #endif | |
80 | #ifndef CONFIG_SMP_ON_UP | |
81 | *(.alt.smp.init) | |
82 | #endif | |
6760b109 RK |
83 | *(.discard) |
84 | *(.discard.*) | |
39df8887 RK |
85 | } |
86 | ||
37d07b72 | 87 | #ifdef CONFIG_XIP_KERNEL |
9d4f13e5 | 88 | . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR); |
37d07b72 | 89 | #else |
9d4f13e5 | 90 | . = PAGE_OFFSET + TEXT_OFFSET; |
37d07b72 | 91 | #endif |
1604d79d | 92 | .head.text : { |
e2f81844 | 93 | _text = .; |
1604d79d RK |
94 | HEAD_TEXT |
95 | } | |
1e6b4811 KC |
96 | |
97 | #ifdef CONFIG_ARM_KERNMEM_PERMS | |
98 | . = ALIGN(1<<SECTION_SHIFT); | |
99 | #endif | |
100 | ||
3835d69a | 101 | .text : { /* Real text segment */ |
e2f81844 | 102 | _stext = .; /* Text and read-only data */ |
eb765c1c | 103 | IDMAP_TEXT |
3835d69a RK |
104 | __exception_text_start = .; |
105 | *(.exception.text) | |
106 | __exception_text_end = .; | |
107 | IRQENTRY_TEXT | |
108 | TEXT_TEXT | |
109 | SCHED_TEXT | |
110 | LOCK_TEXT | |
111 | KPROBES_TEXT | |
3835d69a RK |
112 | *(.gnu.warning) |
113 | *(.glue_7) | |
114 | *(.glue_7t) | |
115 | . = ALIGN(4); | |
116 | *(.got) /* Global offset table */ | |
117 | ARM_CPU_KEEP(PROC_INFO) | |
118 | } | |
119 | ||
80d6b0c2 KC |
120 | #ifdef CONFIG_DEBUG_RODATA |
121 | . = ALIGN(1<<SECTION_SHIFT); | |
122 | #endif | |
3835d69a RK |
123 | RO_DATA(PAGE_SIZE) |
124 | ||
ee951c63 SB |
125 | . = ALIGN(4); |
126 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
127 | __start___ex_table = .; | |
128 | #ifdef CONFIG_MMU | |
129 | *(__ex_table) | |
130 | #endif | |
131 | __stop___ex_table = .; | |
132 | } | |
133 | ||
3835d69a RK |
134 | #ifdef CONFIG_ARM_UNWIND |
135 | /* | |
136 | * Stack unwinding tables | |
137 | */ | |
138 | . = ALIGN(8); | |
139 | .ARM.unwind_idx : { | |
140 | __start_unwind_idx = .; | |
141 | *(.ARM.exidx*) | |
142 | __stop_unwind_idx = .; | |
143 | } | |
144 | .ARM.unwind_tab : { | |
145 | __start_unwind_tab = .; | |
146 | *(.ARM.extab*) | |
147 | __stop_unwind_tab = .; | |
148 | } | |
149 | #endif | |
150 | ||
dad5451a PM |
151 | NOTES |
152 | ||
3835d69a RK |
153 | _etext = .; /* End of text and rodata section */ |
154 | ||
155 | #ifndef CONFIG_XIP_KERNEL | |
1e6b4811 KC |
156 | # ifdef CONFIG_ARM_KERNMEM_PERMS |
157 | . = ALIGN(1<<SECTION_SHIFT); | |
158 | # else | |
3835d69a | 159 | . = ALIGN(PAGE_SIZE); |
1e6b4811 | 160 | # endif |
3835d69a RK |
161 | __init_begin = .; |
162 | #endif | |
b9b32bf7 RK |
163 | /* |
164 | * The vectors and stubs are relocatable code, and the | |
165 | * only thing that matters is their relative offsets | |
166 | */ | |
167 | __vectors_start = .; | |
168 | .vectors 0 : AT(__vectors_start) { | |
169 | *(.vectors) | |
170 | } | |
171 | . = __vectors_start + SIZEOF(.vectors); | |
172 | __vectors_end = .; | |
173 | ||
174 | __stubs_start = .; | |
175 | .stubs 0x1000 : AT(__stubs_start) { | |
176 | *(.stubs) | |
177 | } | |
178 | . = __stubs_start + SIZEOF(.stubs); | |
179 | __stubs_end = .; | |
3835d69a | 180 | |
1604d79d RK |
181 | INIT_TEXT_SECTION(8) |
182 | .exit.text : { | |
183 | ARM_EXIT_KEEP(EXIT_TEXT) | |
184 | } | |
185 | .init.proc.info : { | |
5085f3ff | 186 | ARM_CPU_DISCARD(PROC_INFO) |
1604d79d RK |
187 | } |
188 | .init.arch.info : { | |
1da177e4 | 189 | __arch_info_begin = .; |
1604d79d | 190 | *(.arch.info.init) |
1da177e4 | 191 | __arch_info_end = .; |
1604d79d RK |
192 | } |
193 | .init.tagtable : { | |
1da177e4 | 194 | __tagtable_begin = .; |
1604d79d | 195 | *(.taglist.init) |
1da177e4 | 196 | __tagtable_end = .; |
1604d79d | 197 | } |
f00ec48f | 198 | #ifdef CONFIG_SMP_ON_UP |
1604d79d | 199 | .init.smpalt : { |
f00ec48f | 200 | __smpalt_begin = .; |
1604d79d | 201 | *(.alt.smp.init) |
f00ec48f | 202 | __smpalt_end = .; |
1604d79d | 203 | } |
f00ec48f | 204 | #endif |
1604d79d | 205 | .init.pv_table : { |
dc21af99 | 206 | __pv_table_begin = .; |
1604d79d | 207 | *(.pv_table) |
dc21af99 | 208 | __pv_table_end = .; |
1604d79d RK |
209 | } |
210 | .init.data : { | |
211 | #ifndef CONFIG_XIP_KERNEL | |
212 | INIT_DATA | |
213 | #endif | |
78d7530a | 214 | INIT_SETUP(16) |
78d7530a NE |
215 | INIT_CALLS |
216 | CON_INITCALL | |
217 | SECURITY_INITCALL | |
218 | INIT_RAM_FS | |
1604d79d | 219 | } |
1da177e4 | 220 | #ifndef CONFIG_XIP_KERNEL |
1604d79d | 221 | .exit.data : { |
a9ad21fe | 222 | ARM_EXIT_KEEP(EXIT_DATA) |
1da177e4 | 223 | } |
1604d79d | 224 | #endif |
1da177e4 | 225 | |
9973290c | 226 | #ifdef CONFIG_SMP |
f0d5375e | 227 | PERCPU_SECTION(L1_CACHE_BYTES) |
9973290c | 228 | #endif |
78d7530a | 229 | |
1da177e4 LT |
230 | #ifdef CONFIG_XIP_KERNEL |
231 | __data_loc = ALIGN(4); /* location in binary */ | |
9d4f13e5 | 232 | . = PAGE_OFFSET + TEXT_OFFSET; |
1da177e4 | 233 | #else |
1e6b4811 KC |
234 | #ifdef CONFIG_ARM_KERNMEM_PERMS |
235 | . = ALIGN(1<<SECTION_SHIFT); | |
1da177e4 | 236 | #else |
4f7a1812 | 237 | . = ALIGN(THREAD_SIZE); |
1e6b4811 | 238 | #endif |
562c85ca | 239 | __init_end = .; |
1da177e4 LT |
240 | __data_loc = .; |
241 | #endif | |
242 | ||
243 | .data : AT(__data_loc) { | |
37efe642 | 244 | _data = .; /* address in memory */ |
8c7e6574 | 245 | _sdata = .; |
1da177e4 LT |
246 | |
247 | /* | |
248 | * first, the init task union, aligned | |
249 | * to an 8192 byte boundary. | |
250 | */ | |
78d7530a | 251 | INIT_TASK_DATA(THREAD_SIZE) |
1da177e4 LT |
252 | |
253 | #ifdef CONFIG_XIP_KERNEL | |
f6430a93 | 254 | . = ALIGN(PAGE_SIZE); |
1da177e4 | 255 | __init_begin = .; |
01ba2bdc | 256 | INIT_DATA |
a9ad21fe | 257 | ARM_EXIT_KEEP(EXIT_DATA) |
f6430a93 | 258 | . = ALIGN(PAGE_SIZE); |
1da177e4 LT |
259 | __init_end = .; |
260 | #endif | |
261 | ||
78d7530a | 262 | NOSAVE_DATA |
f0d5375e WD |
263 | CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) |
264 | READ_MOSTLY_DATA(L1_CACHE_BYTES) | |
1da177e4 LT |
265 | |
266 | /* | |
267 | * and the usual data section | |
268 | */ | |
ca967258 | 269 | DATA_DATA |
1da177e4 LT |
270 | CONSTRUCTORS |
271 | ||
272 | _edata = .; | |
273 | } | |
e98ff7f6 | 274 | _edata_loc = __data_loc + SIZEOF(.data); |
1da177e4 | 275 | |
bc581770 LW |
276 | #ifdef CONFIG_HAVE_TCM |
277 | /* | |
278 | * We align everything to a page boundary so we can | |
279 | * free it after init has commenced and TCM contents have | |
280 | * been copied to its destination. | |
281 | */ | |
282 | .tcm_start : { | |
283 | . = ALIGN(PAGE_SIZE); | |
284 | __tcm_start = .; | |
285 | __itcm_start = .; | |
286 | } | |
287 | ||
288 | /* | |
289 | * Link these to the ITCM RAM | |
290 | * Put VMA to the TCM address and LMA to the common RAM | |
291 | * and we'll upload the contents from RAM to TCM and free | |
292 | * the used RAM after that. | |
293 | */ | |
294 | .text_itcm ITCM_OFFSET : AT(__itcm_start) | |
295 | { | |
296 | __sitcm_text = .; | |
297 | *(.tcm.text) | |
298 | *(.tcm.rodata) | |
299 | . = ALIGN(4); | |
300 | __eitcm_text = .; | |
301 | } | |
302 | ||
303 | /* | |
304 | * Reset the dot pointer, this is needed to create the | |
305 | * relative __dtcm_start below (to be used as extern in code). | |
306 | */ | |
307 | . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); | |
308 | ||
309 | .dtcm_start : { | |
310 | __dtcm_start = .; | |
311 | } | |
312 | ||
313 | /* TODO: add remainder of ITCM as well, that can be used for data! */ | |
314 | .data_dtcm DTCM_OFFSET : AT(__dtcm_start) | |
315 | { | |
316 | . = ALIGN(4); | |
317 | __sdtcm_data = .; | |
318 | *(.tcm.data) | |
319 | . = ALIGN(4); | |
320 | __edtcm_data = .; | |
321 | } | |
322 | ||
323 | /* Reset the dot pointer or the linker gets confused */ | |
324 | . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); | |
325 | ||
326 | /* End marker for freeing TCM copy in linked object */ | |
327 | .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ | |
328 | . = ALIGN(PAGE_SIZE); | |
329 | __tcm_end = .; | |
330 | } | |
331 | #endif | |
332 | ||
78d7530a NE |
333 | BSS_SECTION(0, 0, 0) |
334 | _end = .; | |
335 | ||
336 | STABS_DEBUG | |
1da177e4 LT |
337 | } |
338 | ||
728f5c07 RK |
339 | /* |
340 | * These must never be empty | |
341 | * If you have to comment these two assert statements out, your | |
342 | * binutils is too old (for other reasons as well) | |
343 | */ | |
1da177e4 LT |
344 | ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") |
345 | ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") | |
06f75a1f | 346 | |
0394e1f6 | 347 | /* |
06f75a1f AB |
348 | * The HYP init code can't be more than a page long, |
349 | * and should not cross a page boundary. | |
0394e1f6 MZ |
350 | * The above comment applies as well. |
351 | */ | |
12eb3e83 | 352 | ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, |
06f75a1f | 353 | "HYP init code too big or misaligned") |