Re: [PATCH 2/4] omap4: l2x0: Override the default l2x0_disable

[Tony Lindgren <tony@atomide.com>]

* Santosh Shilimkar <santosh.shilimkar@ti.com> [100731 20:38]:
> The machine_kexec() calls outer_disable which can crash on OMAP4
> becasue of trustzone restrictions.
> 
> This patch overrides the default l2x0_disable with a OMAP4
> specific implementation taking care of trustzone

Do you need different handling on GP omaps compared to HS omaps?

Tony
 
> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
> ---
>  arch/arm/mach-omap2/omap4-common.c |   13 +++++++++++++
>  1 files changed, 13 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/mach-omap2/omap4-common.c b/arch/arm/mach-omap2/omap4-common.c
> index 13dc979..b557cc2 100644
> --- a/arch/arm/mach-omap2/omap4-common.c
> +++ b/arch/arm/mach-omap2/omap4-common.c
> @@ -44,6 +44,13 @@ void __init gic_init_irq(void)
>  }
>  
>  #ifdef CONFIG_CACHE_L2X0
> +
> +static void omap4_l2x0_disable(void)
> +{
> +	/* Disable PL310 L2 Cache controller */
> +	omap_smc1(0x102, 0x0);
> +}
> +
>  static int __init omap_l2_cache_init(void)
>  {
>  	/*
> @@ -66,6 +73,12 @@ static int __init omap_l2_cache_init(void)
>  	 */
>  	l2x0_init(l2cache_base, 0x0e050000, 0xc0000fff);
>  
> +	/*
> +	 * Override default outer_cache.disable with a OMAP4
> +	 * specific one
> +	*/
> +	outer_cache.disable = omap4_l2x0_disable;
> +
>  	return 0;
>  }
>  early_initcall(omap_l2_cache_init);
> -- 
> 1.6.0.4
> 
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