2005-04-16 16:20:36 -06:00
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/* ld script to make ARM Linux kernel
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* taken from the i386 version by Russell King
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>
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*/
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#include <asm-generic/vmlinux.lds.h>
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2005-05-05 06:11:00 -06:00
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#include <asm/thread_info.h>
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2005-10-29 14:44:56 -06:00
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#include <asm/memory.h>
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2009-06-24 16:38:56 -06:00
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#include <asm/page.h>
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2005-04-16 16:20:36 -06:00
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2010-10-01 08:37:05 -06:00
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#define PROC_INFO \
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VMLINUX_SYMBOL(__proc_info_begin) = .; \
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*(.proc.info.init) \
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VMLINUX_SYMBOL(__proc_info_end) = .;
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#ifdef CONFIG_HOTPLUG_CPU
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#define ARM_CPU_DISCARD(x)
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#define ARM_CPU_KEEP(x) x
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#else
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#define ARM_CPU_DISCARD(x) x
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#define ARM_CPU_KEEP(x)
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#endif
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2011-02-21 03:13:36 -07:00
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#if defined(CONFIG_SMP_ON_UP) && !defined(CONFIG_DEBUG_SPINLOCK)
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#define ARM_EXIT_KEEP(x) x
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#else
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#define ARM_EXIT_KEEP(x)
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#endif
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2005-04-16 16:20:36 -06:00
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OUTPUT_ARCH(arm)
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ENTRY(stext)
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2005-10-29 14:44:56 -06:00
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2005-04-16 16:20:36 -06:00
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#ifndef __ARMEB__
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jiffies = jiffies_64;
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#else
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jiffies = jiffies_64 + 4;
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#endif
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2005-10-29 14:44:56 -06:00
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2006-01-03 10:28:33 -07:00
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SECTIONS
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{
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2011-05-26 04:25:33 -06:00
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/*
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* unwind exit sections must be discarded before the rest of the
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* unwind sections get included.
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*/
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/DISCARD/ : {
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*(.ARM.exidx.exit.text)
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*(.ARM.extab.exit.text)
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ARM_CPU_DISCARD(*(.ARM.exidx.cpuexit.text))
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ARM_CPU_DISCARD(*(.ARM.extab.cpuexit.text))
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#ifndef CONFIG_HOTPLUG
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*(.ARM.exidx.devexit.text)
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*(.ARM.extab.devexit.text)
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#endif
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#ifndef CONFIG_MMU
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*(.fixup)
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*(__ex_table)
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#endif
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#ifndef CONFIG_SMP_ON_UP
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*(.alt.smp.init)
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#endif
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}
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2005-10-29 14:44:56 -06:00
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#ifdef CONFIG_XIP_KERNEL
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2006-01-03 10:28:33 -07:00
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. = XIP_VIRT_ADDR(CONFIG_XIP_PHYS_ADDR);
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2005-10-29 14:44:56 -06:00
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#else
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2006-01-03 10:28:33 -07:00
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. = PAGE_OFFSET + TEXT_OFFSET;
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2005-10-29 14:44:56 -06:00
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#endif
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2011-07-05 15:56:41 -06:00
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.head.text : {
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2011-07-06 03:53:22 -06:00
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_text = .;
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2011-07-05 15:56:41 -06:00
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HEAD_TEXT
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}
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2011-07-06 03:39:34 -06:00
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.text : { /* Real text segment */
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2011-07-06 03:53:22 -06:00
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_stext = .; /* Text and read-only data */
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2011-07-06 03:39:34 -06:00
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__exception_text_start = .;
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*(.exception.text)
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__exception_text_end = .;
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IRQENTRY_TEXT
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TEXT_TEXT
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SCHED_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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#ifdef CONFIG_MMU
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*(.fixup)
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#endif
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*(.gnu.warning)
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*(.glue_7)
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*(.glue_7t)
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. = ALIGN(4);
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*(.got) /* Global offset table */
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ARM_CPU_KEEP(PROC_INFO)
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}
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RO_DATA(PAGE_SIZE)
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#ifdef CONFIG_ARM_UNWIND
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/*
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* Stack unwinding tables
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*/
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. = ALIGN(8);
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.ARM.unwind_idx : {
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__start_unwind_idx = .;
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*(.ARM.exidx*)
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__stop_unwind_idx = .;
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}
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.ARM.unwind_tab : {
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__start_unwind_tab = .;
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*(.ARM.extab*)
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__stop_unwind_tab = .;
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}
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#endif
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_etext = .; /* End of text and rodata section */
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#ifndef CONFIG_XIP_KERNEL
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. = ALIGN(PAGE_SIZE);
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__init_begin = .;
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#endif
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2011-07-05 15:56:41 -06:00
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INIT_TEXT_SECTION(8)
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.exit.text : {
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ARM_EXIT_KEEP(EXIT_TEXT)
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}
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.init.proc.info : {
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2010-10-01 08:37:05 -06:00
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ARM_CPU_DISCARD(PROC_INFO)
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2011-07-05 15:56:41 -06:00
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}
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.init.arch.info : {
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2005-04-16 16:20:36 -06:00
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__arch_info_begin = .;
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2011-07-05 15:56:41 -06:00
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*(.arch.info.init)
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2005-04-16 16:20:36 -06:00
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__arch_info_end = .;
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2011-07-05 15:56:41 -06:00
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}
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.init.tagtable : {
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2005-04-16 16:20:36 -06:00
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__tagtable_begin = .;
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2011-07-05 15:56:41 -06:00
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*(.taglist.init)
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2005-04-16 16:20:36 -06:00
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__tagtable_end = .;
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2011-07-05 15:56:41 -06:00
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}
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2010-09-04 03:47:48 -06:00
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#ifdef CONFIG_SMP_ON_UP
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2011-07-05 15:56:41 -06:00
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.init.smpalt : {
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2010-09-04 03:47:48 -06:00
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__smpalt_begin = .;
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2011-07-05 15:56:41 -06:00
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*(.alt.smp.init)
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2010-09-04 03:47:48 -06:00
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__smpalt_end = .;
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2011-07-05 15:56:41 -06:00
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}
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2010-09-04 03:47:48 -06:00
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#endif
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2011-07-05 15:56:41 -06:00
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.init.pv_table : {
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ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching
This idea came from Nicolas, Eric Miao produced an initial version,
which was then rewritten into this.
Patch the physical to virtual translations at runtime. As we modify
the code, this makes it incompatible with XIP kernels, but allows us
to achieve this with minimal loss of performance.
As many translations are of the form:
physical = virtual + (PHYS_OFFSET - PAGE_OFFSET)
virtual = physical - (PHYS_OFFSET - PAGE_OFFSET)
we generate an 'add' instruction for __virt_to_phys(), and a 'sub'
instruction for __phys_to_virt(). We calculate at run time (PHYS_OFFSET
- PAGE_OFFSET) by comparing the address prior to MMU initialization with
where it should be once the MMU has been initialized, and place this
constant into the above add/sub instructions.
Once we have (PHYS_OFFSET - PAGE_OFFSET), we can calculate the real
PHYS_OFFSET as PAGE_OFFSET is a build-time constant, and save this for
the C-mode PHYS_OFFSET variable definition to use.
At present, we are unable to support Realview with Sparsemem enabled
as this uses a complex mapping function, and MSM as this requires a
constant which will not fit in our math instruction.
Add a module version magic string for this feature to prevent
incompatible modules being loaded.
Tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-04 12:09:43 -07:00
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__pv_table_begin = .;
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2011-07-05 15:56:41 -06:00
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*(.pv_table)
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ARM: P2V: introduce phys_to_virt/virt_to_phys runtime patching
This idea came from Nicolas, Eric Miao produced an initial version,
which was then rewritten into this.
Patch the physical to virtual translations at runtime. As we modify
the code, this makes it incompatible with XIP kernels, but allows us
to achieve this with minimal loss of performance.
As many translations are of the form:
physical = virtual + (PHYS_OFFSET - PAGE_OFFSET)
virtual = physical - (PHYS_OFFSET - PAGE_OFFSET)
we generate an 'add' instruction for __virt_to_phys(), and a 'sub'
instruction for __phys_to_virt(). We calculate at run time (PHYS_OFFSET
- PAGE_OFFSET) by comparing the address prior to MMU initialization with
where it should be once the MMU has been initialized, and place this
constant into the above add/sub instructions.
Once we have (PHYS_OFFSET - PAGE_OFFSET), we can calculate the real
PHYS_OFFSET as PAGE_OFFSET is a build-time constant, and save this for
the C-mode PHYS_OFFSET variable definition to use.
At present, we are unable to support Realview with Sparsemem enabled
as this uses a complex mapping function, and MSM as this requires a
constant which will not fit in our math instruction.
Add a module version magic string for this feature to prevent
incompatible modules being loaded.
Tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Tested-by: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-01-04 12:09:43 -07:00
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__pv_table_end = .;
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2011-07-05 15:56:41 -06:00
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}
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.init.data : {
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#ifndef CONFIG_XIP_KERNEL
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INIT_DATA
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#endif
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2009-10-02 14:32:47 -06:00
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INIT_SETUP(16)
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INIT_CALLS
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CON_INITCALL
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SECURITY_INITCALL
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INIT_RAM_FS
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2011-07-05 15:56:41 -06:00
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}
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2005-04-16 16:20:36 -06:00
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#ifndef CONFIG_XIP_KERNEL
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2011-07-05 15:56:41 -06:00
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.exit.data : {
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2011-02-21 03:13:36 -07:00
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ARM_EXIT_KEEP(EXIT_DATA)
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2005-04-16 16:20:36 -06:00
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}
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2011-07-05 15:56:41 -06:00
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#endif
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2005-04-16 16:20:36 -06:00
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2011-03-24 11:50:09 -06:00
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PERCPU_SECTION(32)
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2009-10-02 14:32:47 -06:00
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_XIP_KERNEL
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__data_loc = ALIGN(4); /* location in binary */
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2006-01-03 10:28:33 -07:00
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. = PAGE_OFFSET + TEXT_OFFSET;
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2005-04-16 16:20:36 -06:00
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#else
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2011-07-06 03:39:34 -06:00
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__init_end = .;
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2005-05-05 06:11:00 -06:00
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. = ALIGN(THREAD_SIZE);
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2005-04-16 16:20:36 -06:00
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__data_loc = .;
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#endif
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.data : AT(__data_loc) {
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2008-12-01 04:53:07 -07:00
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_data = .; /* address in memory */
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2009-05-30 07:00:17 -06:00
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_sdata = .;
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2005-04-16 16:20:36 -06:00
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/*
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* first, the init task union, aligned
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* to an 8192 byte boundary.
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*/
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2009-10-02 14:32:47 -06:00
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INIT_TASK_DATA(THREAD_SIZE)
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2005-04-16 16:20:36 -06:00
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#ifdef CONFIG_XIP_KERNEL
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2009-06-24 16:38:56 -06:00
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. = ALIGN(PAGE_SIZE);
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2005-04-16 16:20:36 -06:00
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__init_begin = .;
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2008-01-20 06:15:03 -07:00
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INIT_DATA
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2011-02-21 03:13:36 -07:00
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ARM_EXIT_KEEP(EXIT_DATA)
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2009-06-24 16:38:56 -06:00
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. = ALIGN(PAGE_SIZE);
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2005-04-16 16:20:36 -06:00
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__init_end = .;
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#endif
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2009-10-02 14:32:47 -06:00
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NOSAVE_DATA
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CACHELINE_ALIGNED_DATA(32)
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2010-12-04 10:08:32 -07:00
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READ_MOSTLY_DATA(32)
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2005-04-16 16:20:36 -06:00
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2005-10-13 15:04:37 -06:00
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/*
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* The exception fixup table (might need resorting at runtime)
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*/
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. = ALIGN(32);
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__start___ex_table = .;
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2006-06-21 13:38:17 -06:00
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#ifdef CONFIG_MMU
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2005-10-13 15:04:37 -06:00
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*(__ex_table)
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2006-06-21 13:38:17 -06:00
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#endif
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2005-10-13 15:04:37 -06:00
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__stop___ex_table = .;
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2005-04-16 16:20:36 -06:00
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/*
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* and the usual data section
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*/
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2007-05-17 05:38:44 -06:00
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DATA_DATA
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2005-04-16 16:20:36 -06:00
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CONSTRUCTORS
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_edata = .;
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}
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2007-02-22 08:18:09 -07:00
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_edata_loc = __data_loc + SIZEOF(.data);
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2005-04-16 16:20:36 -06:00
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2009-09-15 10:30:37 -06:00
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#ifdef CONFIG_HAVE_TCM
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/*
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* We align everything to a page boundary so we can
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* free it after init has commenced and TCM contents have
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* been copied to its destination.
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*/
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.tcm_start : {
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. = ALIGN(PAGE_SIZE);
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__tcm_start = .;
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__itcm_start = .;
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}
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/*
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* Link these to the ITCM RAM
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* Put VMA to the TCM address and LMA to the common RAM
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* and we'll upload the contents from RAM to TCM and free
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* the used RAM after that.
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*/
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.text_itcm ITCM_OFFSET : AT(__itcm_start)
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{
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__sitcm_text = .;
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*(.tcm.text)
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*(.tcm.rodata)
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. = ALIGN(4);
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__eitcm_text = .;
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}
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/*
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* Reset the dot pointer, this is needed to create the
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* relative __dtcm_start below (to be used as extern in code).
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*/
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. = ADDR(.tcm_start) + SIZEOF(.tcm_start) + SIZEOF(.text_itcm);
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.dtcm_start : {
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__dtcm_start = .;
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}
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/* TODO: add remainder of ITCM as well, that can be used for data! */
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.data_dtcm DTCM_OFFSET : AT(__dtcm_start)
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{
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. = ALIGN(4);
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__sdtcm_data = .;
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*(.tcm.data)
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. = ALIGN(4);
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__edtcm_data = .;
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}
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/* Reset the dot pointer or the linker gets confused */
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. = ADDR(.dtcm_start) + SIZEOF(.data_dtcm);
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/* End marker for freeing TCM copy in linked object */
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.tcm_end : AT(ADDR(.dtcm_start) + SIZEOF(.data_dtcm)){
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. = ALIGN(PAGE_SIZE);
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__tcm_end = .;
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}
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#endif
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2011-02-16 10:54:01 -07:00
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NOTES
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2009-10-02 14:32:47 -06:00
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BSS_SECTION(0, 0, 0)
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_end = .;
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STABS_DEBUG
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2005-04-16 16:20:36 -06:00
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.comment 0 : { *(.comment) }
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2009-11-07 14:03:52 -07:00
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/* Default discards */
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DISCARDS
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2005-04-16 16:20:36 -06:00
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}
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2005-11-17 09:43:14 -07:00
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/*
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* These must never be empty
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* If you have to comment these two assert statements out, your
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* binutils is too old (for other reasons as well)
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*/
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2005-04-16 16:20:36 -06:00
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ASSERT((__proc_info_end - __proc_info_begin), "missing CPU support")
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ASSERT((__arch_info_end - __arch_info_begin), "no machine record defined")
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