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