mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 06:31:52 +00:00
046835b4aa
ARMv8R/M architecture defines new memory protection scheme - PMSAv8 which is not compatible with PMSAv7. Key differences to PMSAv7 are: - Region geometry is defined by base and limit addresses - Addresses need to be either 32 or 64 byte aligned - No region priority due to overlapping regions are not allowed - It is unified, i.e. no distinction between data/instruction regions - Memory attributes are controlled via MAIR This patch implements support for PMSAv8 MPU defined by ARMv8R/M architecture. Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
184 lines
3.6 KiB
ArmAsm
184 lines
3.6 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/* 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>
|
|
*/
|
|
|
|
#ifdef CONFIG_XIP_KERNEL
|
|
#include "vmlinux-xip.lds.S"
|
|
#else
|
|
|
|
#include <asm-generic/vmlinux.lds.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/thread_info.h>
|
|
#include <asm/memory.h>
|
|
#include <asm/mpu.h>
|
|
#include <asm/page.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
#include "vmlinux.lds.h"
|
|
|
|
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_DISCARD
|
|
#ifndef CONFIG_SMP_ON_UP
|
|
*(.alt.smp.init)
|
|
#endif
|
|
}
|
|
|
|
. = PAGE_OFFSET + TEXT_OFFSET;
|
|
.head.text : {
|
|
_text = .;
|
|
HEAD_TEXT
|
|
}
|
|
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
|
. = ALIGN(1<<SECTION_SHIFT);
|
|
#endif
|
|
|
|
#ifdef CONFIG_ARM_MPU
|
|
. = ALIGN(PMSAv8_MINALIGN);
|
|
#endif
|
|
.text : { /* Real text segment */
|
|
_stext = .; /* Text and read-only data */
|
|
ARM_TEXT
|
|
}
|
|
|
|
#ifdef CONFIG_DEBUG_ALIGN_RODATA
|
|
. = ALIGN(1<<SECTION_SHIFT);
|
|
#endif
|
|
_etext = .; /* End of text section */
|
|
|
|
RO_DATA(PAGE_SIZE)
|
|
|
|
. = ALIGN(4);
|
|
__ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
|
|
__start___ex_table = .;
|
|
ARM_MMU_KEEP(*(__ex_table))
|
|
__stop___ex_table = .;
|
|
}
|
|
|
|
#ifdef CONFIG_ARM_UNWIND
|
|
ARM_UNWIND_SECTIONS
|
|
#endif
|
|
|
|
NOTES
|
|
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
|
. = ALIGN(1<<SECTION_SHIFT);
|
|
#else
|
|
. = ALIGN(PAGE_SIZE);
|
|
#endif
|
|
__init_begin = .;
|
|
|
|
ARM_VECTORS
|
|
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_SECTION(16)
|
|
|
|
.exit.data : {
|
|
ARM_EXIT_KEEP(EXIT_DATA)
|
|
}
|
|
|
|
#ifdef CONFIG_SMP
|
|
PERCPU_SECTION(L1_CACHE_BYTES)
|
|
#endif
|
|
|
|
#ifdef CONFIG_HAVE_TCM
|
|
ARM_TCM
|
|
#endif
|
|
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
|
. = ALIGN(1<<SECTION_SHIFT);
|
|
#else
|
|
. = ALIGN(THREAD_SIZE);
|
|
#endif
|
|
__init_end = .;
|
|
|
|
_sdata = .;
|
|
RW_DATA_SECTION(L1_CACHE_BYTES, PAGE_SIZE, THREAD_SIZE)
|
|
_edata = .;
|
|
|
|
BSS_SECTION(0, 0, 0)
|
|
#ifdef CONFIG_ARM_MPU
|
|
. = ALIGN(PMSAv8_MINALIGN);
|
|
#endif
|
|
_end = .;
|
|
|
|
STABS_DEBUG
|
|
}
|
|
|
|
#ifdef CONFIG_STRICT_KERNEL_RWX
|
|
/*
|
|
* Without CONFIG_DEBUG_ALIGN_RODATA, __start_rodata_section_aligned will
|
|
* be the first section-aligned location after __start_rodata. Otherwise,
|
|
* it will be equal to __start_rodata.
|
|
*/
|
|
__start_rodata_section_aligned = ALIGN(__start_rodata, 1 << SECTION_SHIFT);
|
|
#endif
|
|
|
|
/*
|
|
* 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,
|
|
* and should not cross a page boundary.
|
|
* The above comment applies as well.
|
|
*/
|
|
ASSERT(__hyp_idmap_text_end - (__hyp_idmap_text_start & PAGE_MASK) <= PAGE_SIZE,
|
|
"HYP init code too big or misaligned")
|
|
|
|
#endif /* CONFIG_XIP_KERNEL */
|