02b08045a0
Microblaze little-endian toolchain exports __MICROBLAZEEL__ which is used in the kernel to identify little/big endian. The most of the changes are in loading values from DTB which is always big endian. Little endian platforms are based on new AXI bus which has impact to early uartlite initialization. Signed-off-by: Michal Simek <monstr@monstr.eu>
155 lines
3.2 KiB
ArmAsm
155 lines
3.2 KiB
ArmAsm
/*
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* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
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* Copyright (C) 2008-2009 PetaLogix
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* Copyright (C) 2006 Atmark Techno, Inc.
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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OUTPUT_ARCH(microblaze)
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ENTRY(microblaze_start)
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#include <asm/page.h>
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/thread_info.h>
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#ifdef __MICROBLAZEEL__
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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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SECTIONS {
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. = CONFIG_KERNEL_START;
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microblaze_start = CONFIG_KERNEL_BASE_ADDR;
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.text : AT(ADDR(.text) - LOAD_OFFSET) {
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_text = . ;
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_stext = . ;
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HEAD_TEXT
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TEXT_TEXT
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*(.fixup)
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EXIT_TEXT
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EXIT_CALL
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SCHED_TEXT
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LOCK_TEXT
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KPROBES_TEXT
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IRQENTRY_TEXT
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. = ALIGN (4) ;
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_etext = . ;
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}
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. = ALIGN (4) ;
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__fdt_blob : AT(ADDR(__fdt_blob) - LOAD_OFFSET) {
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_fdt_start = . ; /* place for fdt blob */
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*(__fdt_blob) ; /* Any link-placed DTB */
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. = _fdt_start + 0x4000; /* Pad up to 16kbyte */
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_fdt_end = . ;
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}
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. = ALIGN(16);
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RODATA
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EXCEPTION_TABLE(16)
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/*
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* sdata2 section can go anywhere, but must be word aligned
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* and SDA2_BASE must point to the middle of it
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*/
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.sdata2 : AT(ADDR(.sdata2) - LOAD_OFFSET) {
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_ssrw = .;
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. = ALIGN(PAGE_SIZE); /* page aligned when MMU used */
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*(.sdata2)
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. = ALIGN(8);
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_essrw = .;
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_ssrw_size = _essrw - _ssrw;
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_KERNEL_SDA2_BASE_ = _ssrw + (_ssrw_size / 2);
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}
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_sdata = . ;
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RW_DATA_SECTION(32, PAGE_SIZE, THREAD_SIZE)
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_edata = . ;
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/* Reserve some low RAM for r0 based memory references */
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. = ALIGN(0x4) ;
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r0_ram = . ;
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. = . + PAGE_SIZE; /* a page should be enough */
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/* Under the microblaze ABI, .sdata and .sbss must be contiguous */
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. = ALIGN(8);
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.sdata : AT(ADDR(.sdata) - LOAD_OFFSET) {
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_ssro = .;
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*(.sdata)
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}
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.sbss : AT(ADDR(.sbss) - LOAD_OFFSET) {
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_ssbss = .;
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*(.sbss)
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_esbss = .;
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_essro = .;
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_ssro_size = _essro - _ssro ;
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_KERNEL_SDA_BASE_ = _ssro + (_ssro_size / 2) ;
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}
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. = ALIGN(PAGE_SIZE);
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__init_begin = .;
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INIT_TEXT_SECTION(PAGE_SIZE)
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.init.data : AT(ADDR(.init.data) - LOAD_OFFSET) {
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INIT_DATA
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}
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. = ALIGN(4);
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.init.ivt : AT(ADDR(.init.ivt) - LOAD_OFFSET) {
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__ivt_start = .;
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*(.init.ivt)
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__ivt_end = .;
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}
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.init.setup : AT(ADDR(.init.setup) - LOAD_OFFSET) {
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INIT_SETUP(0)
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}
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.initcall.init : AT(ADDR(.initcall.init) - LOAD_OFFSET ) {
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INIT_CALLS
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}
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.con_initcall.init : AT(ADDR(.con_initcall.init) - LOAD_OFFSET) {
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CON_INITCALL
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}
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SECURITY_INIT
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__init_end_before_initramfs = .;
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.init.ramfs ALIGN(PAGE_SIZE) : AT(ADDR(.init.ramfs) - LOAD_OFFSET) {
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__initramfs_start = .;
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*(.init.ramfs)
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__initramfs_end = .;
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. = ALIGN(4);
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LONG(0);
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/*
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* FIXME this can break initramfs for MMU.
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* Pad init.ramfs up to page boundary,
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* so that __init_end == __bss_start. This will make image.elf
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* consistent with the image.bin
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*/
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/* . = ALIGN(PAGE_SIZE); */
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}
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__init_end = .;
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.bss ALIGN (PAGE_SIZE) : AT(ADDR(.bss) - LOAD_OFFSET) {
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/* page aligned when MMU used */
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__bss_start = . ;
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*(.bss*)
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*(COMMON)
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. = ALIGN (4) ;
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__bss_stop = . ;
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_ebss = . ;
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}
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. = ALIGN(PAGE_SIZE);
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_end = .;
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DISCARDS
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}
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