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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>
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
24#ifdef CONFIG_HOTPLUG_CPU
25#define ARM_CPU_DISCARD(x)
26#define ARM_CPU_KEEP(x)		x
27#else
28#define ARM_CPU_DISCARD(x)	x
29#define ARM_CPU_KEEP(x)
30#endif
31
32#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \
33	defined(CONFIG_GENERIC_BUG)
34#define ARM_EXIT_KEEP(x)	x
35#define ARM_EXIT_DISCARD(x)
36#else
37#define ARM_EXIT_KEEP(x)
38#define ARM_EXIT_DISCARD(x)	x
39#endif
40
41OUTPUT_ARCH(arm)
42ENTRY(stext)
43
44#ifndef __ARMEB__
45jiffies = jiffies_64;
46#else
47jiffies = jiffies_64 + 4;
48#endif
49
50SECTIONS
51{
52	/*
53	 * XXX: The linker does not define how output sections are
54	 * assigned to input sections when there are multiple statements
55	 * matching the same input section name.  There is no documented
56	 * order of matching.
57	 *
58	 * unwind exit sections must be discarded before the rest of the
59	 * unwind sections get included.
60	 */
61	/DISCARD/ : {
62		*(.ARM.exidx.exit.text)
63		*(.ARM.extab.exit.text)
64		ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
65		ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
66		ARM_EXIT_DISCARD(EXIT_TEXT)
67		ARM_EXIT_DISCARD(EXIT_DATA)
68		EXIT_CALL
69#ifndef CONFIG_HOTPLUG
70		*(.ARM.exidx.devexit.text)
71		*(.ARM.extab.devexit.text)
72#endif
73#ifndef CONFIG_MMU
74		*(.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#ifdef CONFIG_XIP_KERNEL
85	. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
86#else
87	. = PAGE_OFFSET + TEXT_OFFSET;
88#endif
89	.head.text : {
90		_text = .;
91		HEAD_TEXT
92	}
93	.text : {			/* Real text segment		*/
94		_stext = .;		/* Text and read-only data	*/
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			IDMAP_TEXT
104#ifdef CONFIG_MMU
105			*(.fixup)
106#endif
107			*(.gnu.warning)
108			*(.glue_7)
109			*(.glue_7t)
110		. = ALIGN(4);
111		*(.got)			/* Global offset table		*/
112			ARM_CPU_KEEP(PROC_INFO)
113	}
114
115	RO_DATA(PAGE_SIZE)
116
117#ifdef CONFIG_ARM_UNWIND
118	/*
119	 * Stack unwinding tables
120	 */
121	. = ALIGN(8);
122	.ARM.unwind_idx : {
123		__start_unwind_idx = .;
124		*(.ARM.exidx*)
125		__stop_unwind_idx = .;
126	}
127	.ARM.unwind_tab : {
128		__start_unwind_tab = .;
129		*(.ARM.extab*)
130		__stop_unwind_tab = .;
131	}
132#endif
133
134	_etext = .;			/* End of text and rodata section */
135
136#ifndef CONFIG_XIP_KERNEL
137	. = ALIGN(PAGE_SIZE);
138	__init_begin = .;
139#endif
140	/*
141	 * The vectors and stubs are relocatable code, and the
142	 * only thing that matters is their relative offsets
143	 */
144	__vectors_start = .;
145	.vectors 0 : AT(__vectors_start) {
146		*(.vectors)
147	}
148	. = __vectors_start + SIZEOF(.vectors);
149	__vectors_end = .;
150
151	__stubs_start = .;
152	.stubs 0x1000 : AT(__stubs_start) {
153		*(.stubs)
154	}
155	. = __stubs_start + SIZEOF(.stubs);
156	__stubs_end = .;
157
158	INIT_TEXT_SECTION(8)
159	.exit.text : {
160		ARM_EXIT_KEEP(EXIT_TEXT)
161	}
162	.init.proc.info : {
163		ARM_CPU_DISCARD(PROC_INFO)
164	}
165	.init.arch.info : {
166		__arch_info_begin = .;
167		*(.arch.info.init)
168		__arch_info_end = .;
169	}
170	.init.tagtable : {
171		__tagtable_begin = .;
172		*(.taglist.init)
173		__tagtable_end = .;
174	}
175#ifdef CONFIG_SMP_ON_UP
176	.init.smpalt : {
177		__smpalt_begin = .;
178		*(.alt.smp.init)
179		__smpalt_end = .;
180	}
181#endif
182	.init.pv_table : {
183		__pv_table_begin = .;
184		*(.pv_table)
185		__pv_table_end = .;
186	}
187	.init.data : {
188#ifndef CONFIG_XIP_KERNEL
189		INIT_DATA
190#endif
191		INIT_SETUP(16)
192		INIT_CALLS
193		CON_INITCALL
194		SECURITY_INITCALL
195		INIT_RAM_FS
196	}
197#ifndef CONFIG_XIP_KERNEL
198	.exit.data : {
199		ARM_EXIT_KEEP(EXIT_DATA)
200	}
201#endif
202
203	PERCPU_SECTION(L1_CACHE_BYTES)
204
205#ifdef CONFIG_XIP_KERNEL
206	__data_loc = ALIGN(4);		/* location in binary */
207	. = PAGE_OFFSET + TEXT_OFFSET;
208#else
209	__init_end = .;
210	. = ALIGN(THREAD_SIZE);
211	__data_loc = .;
212#endif
213
214	.data : AT(__data_loc) {
215		_data = .;		/* address in memory */
216		_sdata = .;
217
218		/*
219		 * first, the init task union, aligned
220		 * to an 8192 byte boundary.
221		 */
222		INIT_TASK_DATA(THREAD_SIZE)
223
224#ifdef CONFIG_XIP_KERNEL
225		. = ALIGN(PAGE_SIZE);
226		__init_begin = .;
227		INIT_DATA
228		ARM_EXIT_KEEP(EXIT_DATA)
229		. = ALIGN(PAGE_SIZE);
230		__init_end = .;
231#endif
232
233		NOSAVE_DATA
234		CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
235		READ_MOSTLY_DATA(L1_CACHE_BYTES)
236
237		/*
238		 * The exception fixup table (might need resorting at runtime)
239		 */
240		. = ALIGN(4);
241		__start___ex_table = .;
242#ifdef CONFIG_MMU
243		*(__ex_table)
244#endif
245		__stop___ex_table = .;
246
247		/*
248		 * and the usual data section
249		 */
250		DATA_DATA
251		CONSTRUCTORS
252
253		_edata = .;
254	}
255	_edata_loc = __data_loc + SIZEOF(.data);
256
257#ifdef CONFIG_HAVE_TCM
258        /*
259	 * We align everything to a page boundary so we can
260	 * free it after init has commenced and TCM contents have
261	 * been copied to its destination.
262	 */
263	.tcm_start : {
264		. = ALIGN(PAGE_SIZE);
265		__tcm_start = .;
266		__itcm_start = .;
267	}
268
269	/*
270	 * Link these to the ITCM RAM
271	 * Put VMA to the TCM address and LMA to the common RAM
272	 * and we'll upload the contents from RAM to TCM and free
273	 * the used RAM after that.
274	 */
275	.text_itcm ITCM_OFFSET : AT(__itcm_start)
276	{
277		__sitcm_text = .;
278		*(.tcm.text)
279		*(.tcm.rodata)
280		. = ALIGN(4);
281		__eitcm_text = .;
282	}
283
284	/*
285	 * Reset the dot pointer, this is needed to create the
286	 * relative __dtcm_start below (to be used as extern in code).
287	 */
288	. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
289
290	.dtcm_start : {
291		__dtcm_start = .;
292	}
293
294	/* TODO: add remainder of ITCM as well, that can be used for data! */
295	.data_dtcm DTCM_OFFSET : AT(__dtcm_start)
296	{
297		. = ALIGN(4);
298		__sdtcm_data = .;
299		*(.tcm.data)
300		. = ALIGN(4);
301		__edtcm_data = .;
302	}
303
304	/* Reset the dot pointer or the linker gets confused */
305	. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
306
307	/* End marker for freeing TCM copy in linked object */
308	.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
309		. = ALIGN(PAGE_SIZE);
310		__tcm_end = .;
311	}
312#endif
313
314	NOTES
315
316	BSS_SECTION(0, 0, 0)
317	_end = .;
318
319	STABS_DEBUG
320	.comment 0 : { *(.comment) }
321}
322
323/*
324 * These must never be empty
325 * If you have to comment these two assert statements out, your
326 * binutils is too old (for other reasons as well)
327 */
328ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
329ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
330