[U-Boot] [PATCH v3] arm, arm-kirkwood: disable l2c before linux boot

[Prafulla Wadaskar]

> -----Original Message-----
> From: Michael Walle [mailto:michael at walle.cc]
> Sent: 01 February 2012 04:53
> To: u-boot at lists.denx.de
> Cc: Michael Walle; Albert ARIBAUD; Prafulla Wadaskar; Wolfgang Denk
> Subject: [PATCH v3] arm, arm-kirkwood: disable l2c before linux boot
> 
> The decompressor expects the L2 cache to be disabled. This fixes
> booting
> some kernels, which have CONFIG_ARM_PATCH_PHYS_VIRT enabled.
> 
> Signed-off-by: Michael Walle <michael at walle.cc>
> Cc: Albert ARIBAUD <albert.u.boot at aribaud.net>
> Cc: Prafulla Wadaskar <prafulla at marvell.com>
> Cc: Wolfgang Denk <wd at denx.de>
> ---
> v3:
>   remove unused enable function
> 
> v2:
>   replace magic number with macro
> 
>  arch/arm/cpu/arm926ejs/cache.c           |    9 ++++++++
>  arch/arm/cpu/arm926ejs/cpu.c             |    2 +
>  arch/arm/cpu/arm926ejs/kirkwood/Makefile |    1 +
>  arch/arm/cpu/arm926ejs/kirkwood/cache.c  |   34
> ++++++++++++++++++++++++++++++
>  4 files changed, 46 insertions(+), 0 deletions(-)
>  create mode 100644 arch/arm/cpu/arm926ejs/kirkwood/cache.c
> 
> diff --git a/arch/arm/cpu/arm926ejs/cache.c
> b/arch/arm/cpu/arm926ejs/cache.c
> index ee90ab7..504f604 100644
> --- a/arch/arm/cpu/arm926ejs/cache.c
> +++ b/arch/arm/cpu/arm926ejs/cache.c
> @@ -68,3 +68,12 @@ void  flush_cache(unsigned long start, unsigned
> long size)
>  {
>  }
>  #endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
> +
> +/*
> + * Stub implementations for l2 cache operations
> + */
> +void __l2_cache_disable(void)
> +{
> +}
> +void l2_cache_disable(void)
> +        __attribute__((weak, alias("__l2_cache_disable")));
> diff --git a/arch/arm/cpu/arm926ejs/cpu.c
> b/arch/arm/cpu/arm926ejs/cpu.c
> index 5c902df..626384c 100644
> --- a/arch/arm/cpu/arm926ejs/cpu.c
> +++ b/arch/arm/cpu/arm926ejs/cpu.c
> @@ -50,6 +50,8 @@ int cleanup_before_linux (void)
>  	/* turn off I/D-cache */
>  	icache_disable();
>  	dcache_disable();
> +	l2_cache_disable();
> +
>  	/* flush I/D-cache */
>  	cache_flush();
> 
> diff --git a/arch/arm/cpu/arm926ejs/kirkwood/Makefile
> b/arch/arm/cpu/arm926ejs/kirkwood/Makefile
> index 0754297..777006c 100644
> --- a/arch/arm/cpu/arm926ejs/kirkwood/Makefile
> +++ b/arch/arm/cpu/arm926ejs/kirkwood/Makefile
> @@ -30,6 +30,7 @@ COBJS-y	= cpu.o
>  COBJS-y	+= dram.o
>  COBJS-y	+= mpp.o
>  COBJS-y	+= timer.o
> +COBJS-y	+= cache.o
> 
>  SRCS	:= $(SOBJS:.o=.S) $(COBJS-y:.o=.c)
>  OBJS	:= $(addprefix $(obj),$(SOBJS) $(COBJS-y))
> diff --git a/arch/arm/cpu/arm926ejs/kirkwood/cache.c
> b/arch/arm/cpu/arm926ejs/kirkwood/cache.c
> new file mode 100644
> index 0000000..3e73565
> --- /dev/null
> +++ b/arch/arm/cpu/arm926ejs/kirkwood/cache.c
> @@ -0,0 +1,34 @@
> +/*
> + * Copyright (c) 2011 Michael Walle

Please change this to 2012, otherwise ack for rest of the patch.

Regards..
Prafulla . . .