[U-Boot] [RFC PATCH 5/7] reboard: arm: Add processor function library

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Hi Simon,

Le 22/11/2011 00:57, Simon Glass a ?crit :
> Add a library to hold ARM assembler code which is generic across all
> ARM CPUs.
>
> Signed-off-by: Simon Glass<sjg@chromium.org>
> ---
>   arch/arm/lib/Makefile |    1 +
>   arch/arm/lib/proc.S   |   35 +++++++++++++++++++++++++++++++++++
>   2 files changed, 36 insertions(+), 0 deletions(-)
>   create mode 100644 arch/arm/lib/proc.S
>
> diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
> index ca2802a..27749dc 100644
> --- a/arch/arm/lib/Makefile
> +++ b/arch/arm/lib/Makefile
> @@ -50,6 +50,7 @@ endif
>
>   ifndef CONFIG_SYS_LEGACY_BOARD
>   COBJS-y += arch_reloc.o
> +SOBJS-y += proc.o
>   endif
>
>   SRCS	:= $(GLSOBJS:.o=.S) $(GLCOBJS:.o=.c) \
> diff --git a/arch/arm/lib/proc.S b/arch/arm/lib/proc.S
> new file mode 100644
> index 0000000..99a2944
> --- /dev/null
> +++ b/arch/arm/lib/proc.S
> @@ -0,0 +1,35 @@
> +/*
> + * Copyright (c) 2011 The Chromium OS Authors.
> + * See file CREDITS for list of people who contributed to this
> + * project.
> + *
> + * 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
> + */
> +
> +
> +/**
> + * Jump to board_init_r with a new stack pointer
> + *
> + * @param gd	Pointer to global data
> + * @param dest_addr	Destination address from global data
> + * @param func	Address of board_init_r function (relocated)
> + * @param sp	New stack pointer
> + */
> +.globl proc_call_board_init_r
> +proc_call_board_init_r:
> +	mov	sp, r3
> +	/* jump to it ... */
> +	mov	pc, r2

What do we gain from this patch exactly?

Amicalement,
-- 
Albert.