android_kernel_xiaomi_sdm845/arch/blackfin/kernel/vmlinux.lds.S
Robin Getz 839e01c2bf Blackfin arch: move the init sections to the end of memory to help decrease memory fragementation
move the init sections to the end of memory, so that after they
are free, run time memory is all continugous - this should help decrease
memory fragementation. When doing this, we also pack some of the other
sections a little closer together, to make sure we don't waste memory.
To make this happen, we need to rename the .data.init_task section to
.init_task.data, so it doesn't get picked up by the linker script glob.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
2007-11-15 20:57:53 +08:00

215 lines
4.0 KiB
ArmAsm

/*
* File: arch/blackfin/kernel/vmlinux.lds.S
* Based on: none - original work
* Author:
*
* Created: Tue Sep 21 2004
* Description: Master linker script for blackfin architecture
*
* Modified:
* Copyright 2004-2007 Analog Devices Inc.
*
* Bugs: Enter bugs at http://blackfin.uclinux.org/
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see the file COPYING, or write
* to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define VMLINUX_SYMBOL(_sym_) _##_sym_
#include <asm-generic/vmlinux.lds.h>
#include <asm/mem_map.h>
#include <asm/page.h>
#include <asm/thread_info.h>
OUTPUT_FORMAT("elf32-bfin")
ENTRY(__start)
_jiffies = _jiffies_64;
SECTIONS
{
. = CONFIG_BOOT_LOAD;
/* Neither the text, ro_data or bss section need to be aligned
* So pack them back to back
*/
.text :
{
__text = .;
_text = .;
__stext = .;
TEXT_TEXT
SCHED_TEXT
LOCK_TEXT
KPROBES_TEXT
*(.text.*)
*(.fixup)
. = ALIGN(16);
___start___ex_table = .;
*(__ex_table)
___stop___ex_table = .;
__etext = .;
}
/* Just in case the first read only is a 32-bit access */
RO_DATA(4)
.bss :
{
. = ALIGN(4);
___bss_start = .;
*(.bss .bss.*)
*(COMMON)
___bss_stop = .;
}
.data :
{
__sdata = .;
/* This gets done first, so the glob doesn't suck it in */
. = ALIGN(32);
*(.data.cacheline_aligned)
DATA_DATA
*(.data.*)
CONSTRUCTORS
/* make sure the init_task is aligned to the
* kernel thread size so we can locate the kernel
* stack properly and quickly.
*/
. = ALIGN(THREAD_SIZE);
*(.init_task.data)
__edata = .;
}
/* The init section should be last, so when we free it, it goes into
* the general memory pool, and (hopefully) will decrease fragmentation
* a tiny bit. The init section has a _requirement_ that it be
* PAGE_SIZE aligned
*/
. = ALIGN(PAGE_SIZE);
___init_begin = .;
.init.text :
{
. = ALIGN(PAGE_SIZE);
__sinittext = .;
*(.init.text)
__einittext = .;
}
.init.data :
{
. = ALIGN(16);
*(.init.data)
}
.init.setup :
{
. = ALIGN(16);
___setup_start = .;
*(.init.setup)
___setup_end = .;
}
.initcall.init :
{
___initcall_start = .;
INITCALLS
___initcall_end = .;
}
.con_initcall.init :
{
___con_initcall_start = .;
*(.con_initcall.init)
___con_initcall_end = .;
}
SECURITY_INIT
.init.ramfs :
{
. = ALIGN(4);
___initramfs_start = .;
*(.init.ramfs)
___initramfs_end = .;
}
__l1_lma_start = .;
.text_l1 L1_CODE_START : AT(LOADADDR(.init.ramfs) + SIZEOF(.init.ramfs))
{
. = ALIGN(4);
__stext_l1 = .;
*(.l1.text)
. = ALIGN(4);
__etext_l1 = .;
}
.data_l1 L1_DATA_A_START : AT(LOADADDR(.text_l1) + SIZEOF(.text_l1))
{
. = ALIGN(4);
__sdata_l1 = .;
*(.l1.data)
__edata_l1 = .;
. = ALIGN(4);
__sbss_l1 = .;
*(.l1.bss)
. = ALIGN(32);
*(.data_l1.cacheline_aligned)
. = ALIGN(4);
__ebss_l1 = .;
}
.data_b_l1 L1_DATA_B_START : AT(LOADADDR(.data_l1) + SIZEOF(.data_l1))
{
. = ALIGN(4);
__sdata_b_l1 = .;
*(.l1.data.B)
__edata_b_l1 = .;
. = ALIGN(4);
__sbss_b_l1 = .;
*(.l1.bss.B)
. = ALIGN(4);
__ebss_b_l1 = .;
}
/* Force trailing alignment of our init section so that when we
* free our init memory, we don't leave behind a partial page.
*/
. = LOADADDR(.data_b_l1) + SIZEOF(.data_b_l1);
. = ALIGN(PAGE_SIZE);
___init_end = .;
__end =.;
STABS_DEBUG
DWARF_DEBUG
NOTES
/DISCARD/ :
{
*(.exit.text)
*(.exit.data)
*(.exitcall.exit)
}
}