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			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
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 = .;
148	.vectors 0xffff0000 : AT(__vectors_start) {
149		*(.vectors)
150	}
151	. = __vectors_start + SIZEOF(.vectors);
152	__vectors_end = .;
153
154	__stubs_start = .;
155	.stubs ADDR(.vectors) + 0x1000 : AT(__stubs_start) {
156		*(.stubs)
157	}
158	. = __stubs_start + SIZEOF(.stubs);
159	__stubs_end = .;
160
161	PROVIDE(vector_fiq_offset = vector_fiq - ADDR(.vectors));
162
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
204	_exiprom = .;			/* End of XIP ROM area */
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 */
307ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
308ASSERT((__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 */
315ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
316	"HYP init code too big or misaligned")
317