[PATCH] sh: cache: Fill in invalidate_icache_all()

[Tom Rini]

On Tue, Sep 10, 2024 at 02:15:58AM +0200, Marek Vasut wrote:

> Implement invalidate_icache_all() by clearing all V bits in
> IC and OC. This is done by setting CCR cache control register
> ICI and OCI bits.
> 
> Signed-off-by: Marek Vasut <marek.vasut+renesas at mailbox.org>
> ---
> Cc: Ilias Apalodimas <ilias.apalodimas at linaro.org>
> Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
> Cc: Tom Rini <trini at konsulko.com>
> Cc: u-boot at lists.denx.de
> ---
>  arch/sh/cpu/sh4/cache.c | 11 +++++++----
>  1 file changed, 7 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/sh/cpu/sh4/cache.c b/arch/sh/cpu/sh4/cache.c
> index d3c480e79ed..99acc599965 100644
> --- a/arch/sh/cpu/sh4/cache.c
> +++ b/arch/sh/cpu/sh4/cache.c
> @@ -33,8 +33,9 @@ static inline void cache_wback_all(void)
>  	}
>  }
>  
> -#define CACHE_ENABLE      0
> -#define CACHE_DISABLE     1
> +#define CACHE_ENABLE		0
> +#define CACHE_DISABLE		1
> +#define CACHE_INVALIDATE	2
>  
>  static int cache_control(unsigned int cmd)
>  {
> @@ -46,7 +47,9 @@ static int cache_control(unsigned int cmd)
>  	if (ccr & CCR_CACHE_ENABLE)
>  		cache_wback_all();
>  
> -	if (cmd == CACHE_DISABLE)
> +	if (cmd == CACHE_INVALIDATE)
> +		outl(CCR_CACHE_ICI | ccr, CCR);
> +	else if (cmd == CACHE_DISABLE)
>  		outl(CCR_CACHE_STOP, CCR);
>  	else
>  		outl(CCR_CACHE_INIT, CCR);
> @@ -103,7 +106,7 @@ void icache_disable(void)
>  
>  void invalidate_icache_all(void)
>  {
> -	puts("No arch specific invalidate_icache_all available!\n");
> +	cache_control(CACHE_INVALIDATE);
>  }
>  
>  int icache_status(void)

Thanks for filling this in, I wasn't sure how the implementation would
look from a quick skim of the linux kernel code.

-- 
Tom
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