From 0b135cfc2e524dc249b75057b55dd4cc09842e27 Mon Sep 17 00:00:00 2001 From: Nobuhiro Iwamatsu Date: Sun, 13 May 2007 20:58:00 +0900 Subject: sh: First support code of SuperH. Signed-off-by: Nobuhiro Iwamatsu --- cpu/sh4/start.S | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 cpu/sh4/start.S (limited to 'cpu/sh4/start.S') diff --git a/cpu/sh4/start.S b/cpu/sh4/start.S new file mode 100644 index 00000000000..d88b705ef08 --- /dev/null +++ b/cpu/sh4/start.S @@ -0,0 +1,75 @@ +/* + * (C) Copyright 2007 + * Nobuhiro Iwamatsu + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include + + .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 + +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 + nop + +loop: + bra loop + + .align 2 + +._lowlevel_init: .long (lowlevel_init - (100b + 4)) +._reloc_dst: .long reloc_dst +._reloc_dst_end: .long reloc_dst_end +._bss_start: .long bss_start +._bss_end: .long bss_end +._gd_init: .long (_start - CFG_GBL_DATA_SIZE) +._stack_init: .long (_start - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN - 16) +._sh_generic_init: .long sh_generic_init + -- cgit v1.2.3 From 61fb15c516fef5631e305f1976d7b3a679725856 Mon Sep 17 00:00:00 2001 From: Wolfgang Denk Date: Thu, 27 Dec 2007 01:52:50 +0100 Subject: Fix coding style issues; update CHANGELOG. Signed-off-by: Wolfgang Denk --- cpu/sh4/start.S | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) (limited to 'cpu/sh4/start.S') diff --git a/cpu/sh4/start.S b/cpu/sh4/start.S index d88b705ef08..a68ebb8c93e 100644 --- a/cpu/sh4/start.S +++ b/cpu/sh4/start.S @@ -33,21 +33,21 @@ _start: bsr 1f nop 1: sts pr, r5 - mov.l ._reloc_dst, r4 - add #(_start-1b), r5 - mov.l ._reloc_dst_end, r6 + 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.l ._bss_start, r4 + mov.l ._bss_end, r5 mov #0, r1 -3: mov.l r1, @r4 /* bss clear */ +3: mov.l r1, @r4 /* bss clear */ add #4, r4 cmp/hs r5, r4 bf 3b @@ -56,8 +56,8 @@ _start: mov.l ._stack_init, r15 /* stack */ mov.l ._sh_generic_init, r0 - jsr @r0 - nop + jsr @r0 + nop loop: bra loop @@ -72,4 +72,3 @@ loop: ._gd_init: .long (_start - CFG_GBL_DATA_SIZE) ._stack_init: .long (_start - CFG_GBL_DATA_SIZE - CFG_MALLOC_LEN - 16) ._sh_generic_init: .long sh_generic_init - -- cgit v1.2.3