diff options
Diffstat (limited to 'roms/u-boot/arch/sh/lib/start.S')
| -rw-r--r-- | roms/u-boot/arch/sh/lib/start.S | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/roms/u-boot/arch/sh/lib/start.S b/roms/u-boot/arch/sh/lib/start.S new file mode 100644 index 000000000..ddb9aa9f8 --- /dev/null +++ b/roms/u-boot/arch/sh/lib/start.S @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com> + * Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + */ + +#include <asm-offsets.h> +#include <config.h> + + .text + .align 2 + + .global _start +_start: + mov.l ._lowlevel_init, r0 +100: bsrf r0 + nop + + bsr 1f + nop +1: sts pr, r5 + mov.l ._reloc_dst, r4 + add #(_start-1b), r5 + mov.l ._reloc_dst_end, r6 +#ifdef CONFIG_OF_SEPARATE + mov.l ._reloc_size, r0 + add r5, r0 + add #4, r0 + mov.l @r0, r0 + swap.b r0, r0 + swap.w r0, r0 + swap.b r0, r0 + add #4, r0 + add r0, r6 +#endif + +2: mov.l @r5+, r1 + mov.l r1, @r4 + add #4, r4 + cmp/hs r6, r4 + bf 2b + +#ifndef CONFIG_OF_SEPARATE + mov.l ._bss_start, r4 + mov.l ._bss_end, r5 + mov #0, r1 + +3: mov.l r1, @r4 /* bss clear */ + add #4, r4 + cmp/hs r5, r4 + bf 3b +#endif + + mov.l ._gd_init, r13 /* global data */ + mov.l ._stack_init, r15 /* stack */ +#if CONFIG_VAL(SYS_MALLOC_F_LEN) + mov.l ._gd_malloc_base, r14 + mov.l r15, @r14 +#endif + mov.l ._sh_generic_init, r0 + jsr @r0 + mov #0, r4 + +loop: + bra loop + + .align 2 + +._lowlevel_init: .long (lowlevel_init - (100b + 4)) +._reloc_dst: .long _start +._reloc_dst_end: .long reloc_dst_end +._reloc_size: .long (_end - _start) +._bss_start: .long bss_start +._bss_end: .long bss_end +._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE) +#if CONFIG_VAL(SYS_MALLOC_F_LEN) +._gd_malloc_base: .long (_start - GENERATED_GBL_DATA_SIZE + GD_MALLOC_BASE) +#endif +._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16) +._sh_generic_init: .long board_init_f |