Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

/* ld script to make ARM Linux kernel

 * taken from the i386 version by Russell King

 * Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>

 */

#include <asm-generic/vmlinux.lds.h>

#include <asm/cache.h>

#include <asm/thread_info.h>

#include <asm/memory.h>

#include <asm/page.h>

#define PROC_INFO							\

	. = ALIGN(4);							\

	VMLINUX_SYMBOL(__proc_info_begin) = .;				\

	*(.proc.info.init)						\

	VMLINUX_SYMBOL(__proc_info_end) = .;

#define IDMAP_TEXT							\

	ALIGN_FUNCTION();						\

	VMLINUX_SYMBOL(__idmap_text_start) = .;				\

	*(.idmap.text)							\

	VMLINUX_SYMBOL(__idmap_text_end) = .;				\

	. = ALIGN(32);							\

	VMLINUX_SYMBOL(__hyp_idmap_text_start) = .;			\

	*(.hyp.idmap.text)						\

	VMLINUX_SYMBOL(__hyp_idmap_text_end) = .;

#ifdef CONFIG_HOTPLUG_CPU

#define ARM_CPU_DISCARD(x)

#define ARM_CPU_KEEP(x)		x

#else

#define ARM_CPU_DISCARD(x)	x

#define ARM_CPU_KEEP(x)

#endif

#if (defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)) || \

	defined(CONFIG_GENERIC_BUG)

#define ARM_EXIT_KEEP(x)	x

#define ARM_EXIT_DISCARD(x)

#else

#define ARM_EXIT_KEEP(x)

#define ARM_EXIT_DISCARD(x)	x

#endif

OUTPUT_ARCH(arm)

ENTRY(stext)

#ifndef __ARMEB__

jiffies = jiffies_64;

#else

jiffies = jiffies_64 + 4;

#endif

SECTIONS

{

	/*

	 * XXX: The linker does not define how output sections are

	 * assigned to input sections when there are multiple statements

	 * matching the same input section name.  There is no documented

	 * order of matching.

	 *

	 * unwind exit sections must be discarded before the rest of the

	 * unwind sections get included.

	 */

	/DISCARD/ : {

		*(.ARM.exidx.exit.text)

		*(.ARM.extab.exit.text)

		ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))

		ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))

		ARM_EXIT_DISCARD(EXIT_TEXT)

		ARM_EXIT_DISCARD(EXIT_DATA)

		EXIT_CALL

#ifndef CONFIG_MMU

		*(.fixup)

		*(__ex_table)

#endif

#ifndef CONFIG_SMP_ON_UP

		*(.alt.smp.init)

#endif

		*(.discard)

		*(.discard.*)

	}

#ifdef CONFIG_XIP_KERNEL

	. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);

#else

	. = PAGE_OFFSET + TEXT_OFFSET;

#endif

	.head.text : {

		_text = .;

		HEAD_TEXT

	}

	.text : {			/* Real text segment		*/

		_stext = .;		/* Text and read-only data	*/

			__exception_text_start = .;

			*(.exception.text)

			__exception_text_end = .;

			IRQENTRY_TEXT

			TEXT_TEXT

			SCHED_TEXT

			LOCK_TEXT

			KPROBES_TEXT

			IDMAP_TEXT

#ifdef CONFIG_MMU

			*(.fixup)

#endif

			*(.gnu.warning)

			*(.glue_7)

			*(.glue_7t)

		. = ALIGN(4);

		*(.got)			/* Global offset table		*/

			ARM_CPU_KEEP(PROC_INFO)

	}

	RO_DATA(PAGE_SIZE)

	. = ALIGN(4);

	__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {

		__start___ex_table = .;

#ifdef CONFIG_MMU

		*(__ex_table)

#endif

		__stop___ex_table = .;

	}

#ifdef CONFIG_ARM_UNWIND

	/*

	 * Stack unwinding tables

	 */

	. = ALIGN(8);

	.ARM.unwind_idx : {

		__start_unwind_idx = .;

		*(.ARM.exidx*)

		__stop_unwind_idx = .;

	}

	.ARM.unwind_tab : {

		__start_unwind_tab = .;

		*(.ARM.extab*)

		__stop_unwind_tab = .;

	}

#endif

	NOTES

	_etext = .;			/* End of text and rodata section */

#ifndef CONFIG_XIP_KERNEL

	. = ALIGN(PAGE_SIZE);

	__init_begin = .;

#endif

	/*

	 * The vectors and stubs are relocatable code, and the

	 * only thing that matters is their relative offsets

	 */

	__vectors_start = .;

	.vectors 0 : AT(__vectors_start) {

		*(.vectors)

	}

	. = __vectors_start + SIZEOF(.vectors);

	__vectors_end = .;

	__stubs_start = .;

	.stubs 0x1000 : AT(__stubs_start) {

		*(.stubs)

	}

	. = __stubs_start + SIZEOF(.stubs);

	__stubs_end = .;

	INIT_TEXT_SECTION(8)

	.exit.text : {

		ARM_EXIT_KEEP(EXIT_TEXT)

	}

	.init.proc.info : {

		ARM_CPU_DISCARD(PROC_INFO)

	}

	.init.arch.info : {

		__arch_info_begin = .;

		*(.arch.info.init)

		__arch_info_end = .;

	}

	.init.tagtable : {

		__tagtable_begin = .;

		*(.taglist.init)

		__tagtable_end = .;

	}

#ifdef CONFIG_SMP_ON_UP

	.init.smpalt : {

		__smpalt_begin = .;

		*(.alt.smp.init)

		__smpalt_end = .;

	}

#endif

	.init.pv_table : {

		__pv_table_begin = .;

		*(.pv_table)

		__pv_table_end = .;

	}

	.init.data : {

#ifndef CONFIG_XIP_KERNEL

		INIT_DATA

#endif

		INIT_SETUP(16)

		INIT_CALLS

		CON_INITCALL

		SECURITY_INITCALL

	}

#ifndef CONFIG_XIP_KERNEL

	__init_begin = _stext;

	.exit.data : {

		ARM_EXIT_KEEP(EXIT_DATA)

	}

#endif

#ifdef CONFIG_SMP

	PERCPU_SECTION(L1_CACHE_BYTES)

#endif

#ifdef CONFIG_XIP_KERNEL

	__data_loc = ALIGN(4);		/* location in binary */

	. = PAGE_OFFSET + TEXT_OFFSET;

#else

	__init_end = .;

	. = ALIGN(THREAD_SIZE);

	__data_loc = .;

#endif

	.data : AT(__data_loc) {

		_data = .;		/* address in memory */

		_sdata = .;

		/*

		 * first, the init task union, aligned

		 * to an 8192 byte boundary.

		 */

		INIT_TASK_DATA(THREAD_SIZE)

#ifdef CONFIG_XIP_KERNEL

		. = ALIGN(PAGE_SIZE);

		__init_begin = .;

		INIT_DATA

		ARM_EXIT_KEEP(EXIT_DATA)

		. = ALIGN(PAGE_SIZE);

		__init_end = .;

#endif

		NOSAVE_DATA

		CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)

		READ_MOSTLY_DATA(L1_CACHE_BYTES)

		/*

		 * and the usual data section

		 */

		DATA_DATA

		CONSTRUCTORS

		_edata = .;

	}

		.initramfs : {

		INIT_RAM_FS

		}

	_edata_loc = __data_loc + SIZEOF(.data);

#ifdef CONFIG_HAVE_TCM

        /*

	 * We align everything to a page boundary so we can

	 * free it after init has commenced and TCM contents have

	 * been copied to its destination.

	 */

	.tcm_start : {

		. = ALIGN(PAGE_SIZE);

		__tcm_start = .;

		__itcm_start = .;

	}

	/*

	 * Link these to the ITCM RAM

	 * Put VMA to the TCM address and LMA to the common RAM

	 * and we'll upload the contents from RAM to TCM and free

	 * the used RAM after that.

	 */

	.text_itcm ITCM_OFFSET : AT(__itcm_start)

	{

		__sitcm_text = .;

		*(.tcm.text)

		*(.tcm.rodata)

		. = ALIGN(4);

		__eitcm_text = .;

	}

	/*

	 * Reset the dot pointer, this is needed to create the

	 * relative __dtcm_start below (to be used as extern in code).

	 */

	. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);

	.dtcm_start : {

		__dtcm_start = .;

	}

	/* TODO: add remainder of ITCM as well, that can be used for data! */

	.data_dtcm DTCM_OFFSET : AT(__dtcm_start)

	{

		. = ALIGN(4);

		__sdtcm_data = .;

		*(.tcm.data)

		. = ALIGN(4);

		__edtcm_data = .;

	}

	/* Reset the dot pointer or the linker gets confused */

	. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);

	/* End marker for freeing TCM copy in linked object */

	.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){

		. = ALIGN(PAGE_SIZE);

		__tcm_end = .;

	}

#endif

	BSS_SECTION(0, 0, 0)

	_end = .;

	STABS_DEBUG

	.comment 0 : { *(.comment) }

}

/*

 * These must never be empty

 * If you have to comment these two assert statements out, your

 * binutils is too old (for other reasons as well)

 */

ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")

ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")

/*

 * The HYP init code can't be more than a page long.

 * The above comment applies as well.

 */

ASSERT(((__hyp_idmap_text_end - __hyp_idmap_text_start) <= PAGE_SIZE), "HYP init code too big")