diff options
Diffstat (limited to 'arch/sh/lib')
| -rw-r--r-- | arch/sh/lib/Makefile | 2 | ||||
| -rw-r--r-- | arch/sh/lib/start.S | 67 |
2 files changed, 69 insertions, 0 deletions
diff --git a/arch/sh/lib/Makefile b/arch/sh/lib/Makefile index 7be20b1bdd..473cf0de2d 100644 --- a/arch/sh/lib/Makefile +++ b/arch/sh/lib/Makefile @@ -5,6 +5,8 @@ # SPDX-License-Identifier: GPL-2.0+ # +extra-y += start.o + obj-y += board.o obj-$(CONFIG_CMD_BOOTM) += bootm.o ifeq ($(CONFIG_CPU_SH2),y) diff --git a/arch/sh/lib/start.S b/arch/sh/lib/start.S new file mode 100644 index 0000000000..37d38d5fb8 --- /dev/null +++ b/arch/sh/lib/start.S @@ -0,0 +1,67 @@ +/* + * Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com> + * Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <asm-offsets.h> +#include <config.h> + + .text + .align 2 + + .global _start +_start: +#ifdef CONFIG_CPU_SH2 + .long 0x00000010 /* Ppower ON reset PC*/ + .long 0x00000000 + .long 0x00000010 /* Manual reset PC */ + .long 0x00000000 +#endif + 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 + +2: mov.l @r5+, r1 + mov.l r1, @r4 + add #4, r4 + cmp/hs r6, r4 + bf 2b + + 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 + + mov.l ._gd_init, r13 /* global data */ + mov.l ._stack_init, r15 /* stack */ + + 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 +._bss_start: .long bss_start +._bss_end: .long bss_end +._gd_init: .long (_start - GENERATED_GBL_DATA_SIZE) +._stack_init: .long (_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16) +._sh_generic_init: .long board_init_f |