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538bf469 CB |
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> | |
7 | #include <asm/cache.h> | |
8 | #include <asm/thread_info.h> | |
9 | #include <asm/memory.h> | |
10 | #include <asm/page.h> | |
538bf469 CB |
11 | |
12 | #define PROC_INFO \ | |
13 | . = ALIGN(4); \ | |
14 | VMLINUX_SYMBOL(__proc_info_begin) = .; \ | |
15 | *(.proc.info.init) \ | |
16 | VMLINUX_SYMBOL(__proc_info_end) = .; | |
17 | ||
18 | #define IDMAP_TEXT \ | |
19 | ALIGN_FUNCTION(); \ | |
20 | VMLINUX_SYMBOL(__idmap_text_start) = .; \ | |
21 | *(.idmap.text) \ | |
22 | VMLINUX_SYMBOL(__idmap_text_end) = .; \ | |
23 | . = ALIGN(PAGE_SIZE); \ | |
24 | VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \ | |
25 | *(.hyp.idmap.text) \ | |
26 | VMLINUX_SYMBOL(__hyp_idmap_text_end) = .; | |
27 | ||
28 | #ifdef CONFIG_HOTPLUG_CPU | |
29 | #define ARM_CPU_DISCARD(x) | |
30 | #define ARM_CPU_KEEP(x) x | |
31 | #else | |
32 | #define ARM_CPU_DISCARD(x) x | |
33 | #define ARM_CPU_KEEP(x) | |
34 | #endif | |
35 | ||
36 | #if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \ | |
37 | defined(CONFIG_GENERIC_BUG) | |
38 | #define ARM_EXIT_KEEP(x) x | |
39 | #define ARM_EXIT_DISCARD(x) | |
40 | #else | |
41 | #define ARM_EXIT_KEEP(x) | |
42 | #define ARM_EXIT_DISCARD(x) x | |
43 | #endif | |
44 | ||
45 | OUTPUT_ARCH(arm) | |
46 | ENTRY(stext) | |
47 | ||
48 | #ifndef __ARMEB__ | |
49 | jiffies = jiffies_64; | |
50 | #else | |
51 | jiffies = jiffies_64 + 4; | |
52 | #endif | |
53 | ||
54 | SECTIONS | |
55 | { | |
56 | /* | |
57 | * XXX: The linker does not define how output sections are | |
58 | * assigned to input sections when there are multiple statements | |
59 | * matching the same input section name. There is no documented | |
60 | * order of matching. | |
61 | * | |
62 | * unwind exit sections must be discarded before the rest of the | |
63 | * unwind sections get included. | |
64 | */ | |
65 | /DISCARD/ : { | |
66 | *(.ARM.exidx.exit.text) | |
67 | *(.ARM.extab.exit.text) | |
68 | ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text)) | |
69 | ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text)) | |
70 | ARM_EXIT_DISCARD(EXIT_TEXT) | |
71 | ARM_EXIT_DISCARD(EXIT_DATA) | |
72 | EXIT_CALL | |
73 | #ifndef CONFIG_MMU | |
74 | *(.text.fixup) | |
75 | *(__ex_table) | |
76 | #endif | |
77 | #ifndef CONFIG_SMP_ON_UP | |
78 | *(.alt.smp.init) | |
79 | #endif | |
80 | *(.discard) | |
81 | *(.discard.*) | |
82 | } | |
83 | ||
84 | . = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR); | |
02afa9a8 | 85 | _xiprom = .; /* XIP ROM area to be mapped */ |
538bf469 CB |
86 | |
87 | .head.text : { | |
88 | _text = .; | |
89 | HEAD_TEXT | |
90 | } | |
91 | ||
538bf469 CB |
92 | .text : { /* Real text segment */ |
93 | _stext = .; /* Text and read-only data */ | |
94 | IDMAP_TEXT | |
95 | __exception_text_start = .; | |
96 | *(.exception.text) | |
97 | __exception_text_end = .; | |
98 | IRQENTRY_TEXT | |
99 | TEXT_TEXT | |
100 | SCHED_TEXT | |
101 | LOCK_TEXT | |
102 | KPROBES_TEXT | |
103 | *(.gnu.warning) | |
104 | *(.glue_7) | |
105 | *(.glue_7t) | |
106 | . = ALIGN(4); | |
107 | *(.got) /* Global offset table */ | |
108 | ARM_CPU_KEEP(PROC_INFO) | |
109 | } | |
110 | ||
538bf469 CB |
111 | RO_DATA(PAGE_SIZE) |
112 | ||
113 | . = ALIGN(4); | |
114 | __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { | |
115 | __start___ex_table = .; | |
116 | #ifdef CONFIG_MMU | |
117 | *(__ex_table) | |
118 | #endif | |
119 | __stop___ex_table = .; | |
120 | } | |
121 | ||
122 | #ifdef CONFIG_ARM_UNWIND | |
123 | /* | |
124 | * Stack unwinding tables | |
125 | */ | |
126 | . = ALIGN(8); | |
127 | .ARM.unwind_idx : { | |
128 | __start_unwind_idx = .; | |
129 | *(.ARM.exidx*) | |
130 | __stop_unwind_idx = .; | |
131 | } | |
132 | .ARM.unwind_tab : { | |
133 | __start_unwind_tab = .; | |
134 | *(.ARM.extab*) | |
135 | __stop_unwind_tab = .; | |
136 | } | |
137 | #endif | |
138 | ||
139 | NOTES | |
140 | ||
141 | _etext = .; /* End of text and rodata section */ | |
142 | ||
143 | /* | |
144 | * The vectors and stubs are relocatable code, and the | |
145 | * only thing that matters is their relative offsets | |
146 | */ | |
147 | __vectors_start = .; | |
31b96cae | 148 | .vectors 0xffff0000 : AT(__vectors_start) { |
538bf469 CB |
149 | *(.vectors) |
150 | } | |
151 | . = __vectors_start + SIZEOF(.vectors); | |
152 | __vectors_end = .; | |
153 | ||
154 | __stubs_start = .; | |
31b96cae | 155 | .stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) { |
538bf469 CB |
156 | *(.stubs) |
157 | } | |
158 | . = __stubs_start + SIZEOF(.stubs); | |
159 | __stubs_end = .; | |
160 | ||
31b96cae AB |
161 | PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors)); |
162 | ||
538bf469 CB |
163 | INIT_TEXT_SECTION(8) |
164 | .exit.text : { | |
165 | ARM_EXIT_KEEP(EXIT_TEXT) | |
166 | } | |
167 | .init.proc.info : { | |
168 | ARM_CPU_DISCARD(PROC_INFO) | |
169 | } | |
170 | .init.arch.info : { | |
171 | __arch_info_begin = .; | |
172 | *(.arch.info.init) | |
173 | __arch_info_end = .; | |
174 | } | |
175 | .init.tagtable : { | |
176 | __tagtable_begin = .; | |
177 | *(.taglist.init) | |
178 | __tagtable_end = .; | |
179 | } | |
180 | #ifdef CONFIG_SMP_ON_UP | |
181 | .init.smpalt : { | |
182 | __smpalt_begin = .; | |
183 | *(.alt.smp.init) | |
184 | __smpalt_end = .; | |
185 | } | |
186 | #endif | |
187 | .init.pv_table : { | |
188 | __pv_table_begin = .; | |
189 | *(.pv_table) | |
190 | __pv_table_end = .; | |
191 | } | |
192 | .init.data : { | |
193 | INIT_SETUP(16) | |
194 | INIT_CALLS | |
195 | CON_INITCALL | |
196 | SECURITY_INITCALL | |
197 | INIT_RAM_FS | |
198 | } | |
199 | ||
200 | #ifdef CONFIG_SMP | |
201 | PERCPU_SECTION(L1_CACHE_BYTES) | |
202 | #endif | |
203 | ||
02afa9a8 | 204 | _exiprom = .; /* End of XIP ROM area */ |
538bf469 CB |
205 | __data_loc = ALIGN(4); /* location in binary */ |
206 | . = PAGE_OFFSET + TEXT_OFFSET; | |
207 | ||
208 | .data : AT(__data_loc) { | |
209 | _data = .; /* address in memory */ | |
210 | _sdata = .; | |
211 | ||
212 | /* | |
213 | * first, the init task union, aligned | |
214 | * to an 8192 byte boundary. | |
215 | */ | |
216 | INIT_TASK_DATA(THREAD_SIZE) | |
217 | ||
218 | . = ALIGN(PAGE_SIZE); | |
219 | __init_begin = .; | |
220 | INIT_DATA | |
221 | ARM_EXIT_KEEP(EXIT_DATA) | |
222 | . = ALIGN(PAGE_SIZE); | |
223 | __init_end = .; | |
224 | ||
225 | NOSAVE_DATA | |
226 | CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES) | |
227 | READ_MOSTLY_DATA(L1_CACHE_BYTES) | |
228 | ||
229 | /* | |
230 | * and the usual data section | |
231 | */ | |
232 | DATA_DATA | |
233 | CONSTRUCTORS | |
234 | ||
235 | _edata = .; | |
236 | } | |
237 | _edata_loc = __data_loc + SIZEOF(.data); | |
238 | ||
239 | #ifdef CONFIG_HAVE_TCM | |
240 | /* | |
241 | * We align everything to a page boundary so we can | |
242 | * free it after init has commenced and TCM contents have | |
243 | * been copied to its destination. | |
244 | */ | |
245 | .tcm_start : { | |
246 | . = ALIGN(PAGE_SIZE); | |
247 | __tcm_start = .; | |
248 | __itcm_start = .; | |
249 | } | |
250 | ||
251 | /* | |
252 | * Link these to the ITCM RAM | |
253 | * Put VMA to the TCM address and LMA to the common RAM | |
254 | * and we'll upload the contents from RAM to TCM and free | |
255 | * the used RAM after that. | |
256 | */ | |
257 | .text_itcm ITCM_OFFSET : AT(__itcm_start) | |
258 | { | |
259 | __sitcm_text = .; | |
260 | *(.tcm.text) | |
261 | *(.tcm.rodata) | |
262 | . = ALIGN(4); | |
263 | __eitcm_text = .; | |
264 | } | |
265 | ||
266 | /* | |
267 | * Reset the dot pointer, this is needed to create the | |
268 | * relative __dtcm_start below (to be used as extern in code). | |
269 | */ | |
270 | . = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm); | |
271 | ||
272 | .dtcm_start : { | |
273 | __dtcm_start = .; | |
274 | } | |
275 | ||
276 | /* TODO: add remainder of ITCM as well, that can be used for data! */ | |
277 | .data_dtcm DTCM_OFFSET : AT(__dtcm_start) | |
278 | { | |
279 | . = ALIGN(4); | |
280 | __sdtcm_data = .; | |
281 | *(.tcm.data) | |
282 | . = ALIGN(4); | |
283 | __edtcm_data = .; | |
284 | } | |
285 | ||
286 | /* Reset the dot pointer or the linker gets confused */ | |
287 | . = ADDR(.dtcm_start) + SIZEOF(.data_dtcm); | |
288 | ||
289 | /* End marker for freeing TCM copy in linked object */ | |
290 | .tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){ | |
291 | . = ALIGN(PAGE_SIZE); | |
292 | __tcm_end = .; | |
293 | } | |
294 | #endif | |
295 | ||
296 | BSS_SECTION(0, 0, 0) | |
297 | _end = .; | |
298 | ||
299 | STABS_DEBUG | |
300 | } | |
301 | ||
302 | /* | |
303 | * These must never be empty | |
304 | * If you have to comment these two assert statements out, your | |
305 | * binutils is too old (for other reasons as well) | |
306 | */ | |
307 | ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support") | |
308 | ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined") | |
309 | ||
310 | /* | |
311 | * The HYP init code can't be more than a page long, | |
312 | * and should not cross a page boundary. | |
313 | * The above comment applies as well. | |
314 | */ | |
315 | ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE, | |
316 | "HYP init code too big or misaligned") |