diff options
| author | Vladimir Zapolskiy <vz@mleia.com> | 2016-11-28 00:15:33 +0200 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2016-12-02 21:32:53 -0500 |
| commit | 9c141b2bd72f9e51bd627580be7ffca93ba9b2d4 (patch) | |
| tree | 8e635edd01729d08c091327c431f4d278dc99b5d /arch/sh | |
| parent | bccf09e0e16f812dd61c4972a1125b58a221a87d (diff) | |
sh4: fix start.S by calling board_init_f() after first code relocation
Like on ARM platform keep the first code relocation from a U-boot
image storage to RAM at CONFIG_SYS_TEXT_BASE, then pass execution to a
generic board_init_f() with empty GD flags. If CONFIG_SYS_TEXT_BASE is
equal to a calculated by board_init_f() relocation address there will
be no more code and data copy, however it's worth to mention that the
first copy happens even if $pc on _start is the same as
CONFIG_SYS_TEXT_BASE, on practice this works without a problem.
Also note that _sh_start is renamed back to _start to correct
gd->mon_len calculation by setup_mon_len(), the opposite rename was
done in pre-generic board commit 2024b968ee9 ("sh: Fix build in start.S").
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/sh')
| -rw-r--r-- | arch/sh/cpu/sh4/start.S | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/arch/sh/cpu/sh4/start.S b/arch/sh/cpu/sh4/start.S index 77fc221aa5..416adcfb1c 100644 --- a/arch/sh/cpu/sh4/start.S +++ b/arch/sh/cpu/sh4/start.S @@ -1,6 +1,6 @@ /* - * (C) Copyright 2007, 2010 - * Nobuhiro Iwamatsu <iwamatsu@nigauri.org> + * Copyright (C) 2016 Vladimir Zapolskiy <vz@mleia.com> + * Copyright (C) 2007, 2010 Nobuhiro Iwamatsu <iwamatsu@nigauri.org> * * SPDX-License-Identifier: GPL-2.0+ */ @@ -12,7 +12,7 @@ .align 2 .global _start -_sh_start: +_start: mov.l ._lowlevel_init, r0 100: bsrf r0 nop @@ -21,7 +21,7 @@ _sh_start: nop 1: sts pr, r5 mov.l ._reloc_dst, r4 - add #(_sh_start-1b), r5 + add #(_start-1b), r5 mov.l ._reloc_dst_end, r6 2: mov.l @r5+, r1 @@ -42,10 +42,9 @@ _sh_start: mov.l ._gd_init, r13 /* global data */ mov.l ._stack_init, r15 /* stack */ - #TODO(sh maintainer): Fix this up to call the correct code - #mov.l ._sh_generic_init, r0 - #jsr @r0 - nop + mov.l ._sh_generic_init, r0 + jsr @r0 + mov #0, r4 loop: bra loop @@ -53,10 +52,10 @@ loop: .align 2 ._lowlevel_init: .long (lowlevel_init - (100b + 4)) -._reloc_dst: .long reloc_dst +._reloc_dst: .long _start ._reloc_dst_end: .long reloc_dst_end ._bss_start: .long bss_start ._bss_end: .long bss_end -._gd_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE) -._stack_init: .long (_sh_start - GENERATED_GBL_DATA_SIZE - CONFIG_SYS_MALLOC_LEN - 16) -#._sh_generic_init: .long sh_generic_init +._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 |