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	. = 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
45OUTPUT_ARCH(arm)
46ENTRY(stext)
47
48#ifndef __ARMEB__
49jiffies = jiffies_64;
50#else
51jiffies = jiffies_64 + 4;
52#endif
53
54SECTIONS
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);
85	_xiprom = .;			/* XIP ROM area to be mapped */
86
87	.head.text : {
88		_text = .;
89		HEAD_TEXT
90	}
91
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			CPUIDLE_TEXT
102			LOCK_TEXT
103			KPROBES_TEXT
104			*(.gnu.warning)
105			*(.glue_7)
106			*(.glue_7t)
107		. = ALIGN(4);
108		*(.got)			/* Global offset table		*/
109			ARM_CPU_KEEP(PROC_INFO)
110	}
111
112	RO_DATA(PAGE_SIZE)
113
114	. = ALIGN(4);
115	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
116		__start___ex_table = .;
117#ifdef CONFIG_MMU
118		*(__ex_table)
119#endif
120		__stop___ex_table = .;
121	}
122
123#ifdef CONFIG_ARM_UNWIND
124	/*
125	 * Stack unwinding tables
126	 */
127	. = ALIGN(8);
128	.ARM.unwind_idx : {
129		__start_unwind_idx = .;
130		*(.ARM.exidx*)
131		__stop_unwind_idx = .;
132	}
133	.ARM.unwind_tab : {
134		__start_unwind_tab = .;
135		*(.ARM.extab*)
136		__stop_unwind_tab = .;
137	}
138#endif
139
140	NOTES
141
142	_etext = .;			/* End of text and rodata section */
143
144	/*
145	 * The vectors and stubs are relocatable code, and the
146	 * only thing that matters is their relative offsets
147	 */
148	__vectors_start = .;
149	.vectors 0xffff0000 : AT(__vectors_start) {
150		*(.vectors)
151	}
152	. = __vectors_start + SIZEOF(.vectors);
153	__vectors_end = .;
154
155	__stubs_start = .;
156	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
157		*(.stubs)
158	}
159	. = __stubs_start + SIZEOF(.stubs);
160	__stubs_end = .;
161
162	PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
163
164	INIT_TEXT_SECTION(8)
165	.exit.text : {
166		ARM_EXIT_KEEP(EXIT_TEXT)
167	}
168	.init.proc.info : {
169		ARM_CPU_DISCARD(PROC_INFO)
170	}
171	.init.arch.info : {
172		__arch_info_begin = .;
173		*(.arch.info.init)
174		__arch_info_end = .;
175	}
176	.init.tagtable : {
177		__tagtable_begin = .;
178		*(.taglist.init)
179		__tagtable_end = .;
180	}
181#ifdef CONFIG_SMP_ON_UP
182	.init.smpalt : {
183		__smpalt_begin = .;
184		*(.alt.smp.init)
185		__smpalt_end = .;
186	}
187#endif
188	.init.pv_table : {
189		__pv_table_begin = .;
190		*(.pv_table)
191		__pv_table_end = .;
192	}
193	.init.data : {
194		INIT_SETUP(16)
195		INIT_CALLS
196		CON_INITCALL
197		SECURITY_INITCALL
198		INIT_RAM_FS
199	}
200
201#ifdef CONFIG_SMP
202	PERCPU_SECTION(L1_CACHE_BYTES)
203#endif
204
205	_exiprom = .;			/* End of XIP ROM area */
206	__data_loc = ALIGN(4);		/* location in binary */
207	. = PAGE_OFFSET + TEXT_OFFSET;
208
209	.data : AT(__data_loc) {
210		_data = .;		/* address in memory */
211		_sdata = .;
212
213		/*
214		 * first, the init task union, aligned
215		 * to an 8192 byte boundary.
216		 */
217		INIT_TASK_DATA(THREAD_SIZE)
218
219		. = ALIGN(PAGE_SIZE);
220		__init_begin = .;
221		INIT_DATA
222		ARM_EXIT_KEEP(EXIT_DATA)
223		. = ALIGN(PAGE_SIZE);
224		__init_end = .;
225
226		NOSAVE_DATA
227		CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
228		READ_MOSTLY_DATA(L1_CACHE_BYTES)
229
230		/*
231		 * and the usual data section
232		 */
233		DATA_DATA
234		CONSTRUCTORS
235
236		_edata = .;
237	}
238	_edata_loc = __data_loc + SIZEOF(.data);
239
240#ifdef CONFIG_HAVE_TCM
241        /*
242	 * We align everything to a page boundary so we can
243	 * free it after init has commenced and TCM contents have
244	 * been copied to its destination.
245	 */
246	.tcm_start : {
247		. = ALIGN(PAGE_SIZE);
248		__tcm_start = .;
249		__itcm_start = .;
250	}
251
252	/*
253	 * Link these to the ITCM RAM
254	 * Put VMA to the TCM address and LMA to the common RAM
255	 * and we'll upload the contents from RAM to TCM and free
256	 * the used RAM after that.
257	 */
258	.text_itcm ITCM_OFFSET : AT(__itcm_start)
259	{
260		__sitcm_text = .;
261		*(.tcm.text)
262		*(.tcm.rodata)
263		. = ALIGN(4);
264		__eitcm_text = .;
265	}
266
267	/*
268	 * Reset the dot pointer, this is needed to create the
269	 * relative __dtcm_start below (to be used as extern in code).
270	 */
271	. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
272
273	.dtcm_start : {
274		__dtcm_start = .;
275	}
276
277	/* TODO: add remainder of ITCM as well, that can be used for data! */
278	.data_dtcm DTCM_OFFSET : AT(__dtcm_start)
279	{
280		. = ALIGN(4);
281		__sdtcm_data = .;
282		*(.tcm.data)
283		. = ALIGN(4);
284		__edtcm_data = .;
285	}
286
287	/* Reset the dot pointer or the linker gets confused */
288	. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
289
290	/* End marker for freeing TCM copy in linked object */
291	.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
292		. = ALIGN(PAGE_SIZE);
293		__tcm_end = .;
294	}
295#endif
296
297	BSS_SECTION(0, 0, 0)
298	_end = .;
299
300	STABS_DEBUG
301}
302
303/*
304 * These must never be empty
305 * If you have to comment these two assert statements out, your
306 * binutils is too old (for other reasons as well)
307 */
308ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
309ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
310
311/*
312 * The HYP init code can't be more than a page long,
313 * and should not cross a page boundary.
314 * The above comment applies as well.
315 */
316ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
317	"HYP init code too big or misaligned")
318