[PATCH v4 3/3] ARM: imx6: dh-imx6: Enable d-cache early in SPL

[Marek Vasut]

On 8/17/22 11:06, Philip Oberfichtner wrote:

[...]

> +void spl_board_prepare_for_boot(void)
> +{
> +	/*
> +	 * Flush dcache.

The dcache_disable() does not do any cache flushing, it just disables 
the Dcache enable C-bit.

> Without it U-Boot proper would hang at random locations. Presumably this is
> +	 * due to dirty cache lines remaining after SPL passes control. When U-Boot proper later on
> +	 * calls invalidate_dcache_all(), those dirty cache lines will get lost.
> +	 */

What about falcon boot mode starting Linux from SPL, could it fail the 
same way ?

> +	dcache_disable();
> +}

[...]