diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2006-10-01 17:55:53 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-10-01 17:55:53 +0100 |
| commit | 8a84fc15ae5cafcc366dd85cf8e1ab2040679abc (patch) | |
| tree | 5d8dce194c9667fa92e9ec9f545cec867a9a1e0d /arch/avr32/boot/u-boot/head.S | |
| parent | 28b79ff9661b22e4c41c0d00d4ab8503e810f13d (diff) | |
| parent | 82965addad66fce61a92c5f03104ea90b0b87124 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Manually resolve conflict in include/mtd/Kbuild
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'arch/avr32/boot/u-boot/head.S')
| -rw-r--r-- | arch/avr32/boot/u-boot/head.S | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/avr32/boot/u-boot/head.S b/arch/avr32/boot/u-boot/head.S new file mode 100644 index 00000000000..4488fa27fe9 --- /dev/null +++ b/arch/avr32/boot/u-boot/head.S @@ -0,0 +1,60 @@ +/* + * Startup code for use with the u-boot bootloader. + * + * Copyright (C) 2004-2006 Atmel Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <asm/setup.h> + + /* + * The kernel is loaded where we want it to be and all caches + * have just been flushed. We get two parameters from u-boot: + * + * r12 contains a magic number (ATAG_MAGIC) + * r11 points to a tag table providing information about + * the system. + */ + .section .init.text,"ax" + .global _start +_start: + /* Check if the boot loader actually provided a tag table */ + lddpc r0, magic_number + cp.w r12, r0 + brne no_tag_table + + /* Initialize .bss */ + lddpc r2, bss_start_addr + lddpc r3, end_addr + mov r0, 0 + mov r1, 0 +1: st.d r2++, r0 + cp r2, r3 + brlo 1b + + /* + * Save the tag table address for later use. This must be done + * _after_ .bss has been initialized... + */ + lddpc r0, tag_table_addr + st.w r0[0], r11 + + /* Jump to loader-independent setup code */ + rjmp kernel_entry + + .align 2 +magic_number: + .long ATAG_MAGIC +tag_table_addr: + .long bootloader_tags +bss_start_addr: + .long __bss_start +end_addr: + .long _end + +no_tag_table: + sub r12, pc, (. - 2f) + bral panic +2: .asciz "Boot loader didn't provide correct magic number\n" |