[PATCH 1/3] ARM: mmu: Setup MT_MEMORY and MT_MEMORY_NONACHED L1 entries

Russell King - ARM Linux linux at arm.linux.org.uk
Sun Aug 8 07:34:04 EDT 2010


On Sun, Aug 08, 2010 at 03:47:52PM +0530, Santosh Shilimkar wrote:
> @@ -475,6 +486,9 @@ static void __init build_mem_type_table(void)
>  	mem_types[MT_LOW_VECTORS].prot_l1 |= ecc_mask;
>  	mem_types[MT_HIGH_VECTORS].prot_l1 |= ecc_mask;
>  	mem_types[MT_MEMORY].prot_sect |= ecc_mask | cp->pmd;
> +	mem_types[MT_MEMORY].prot_pte |= kern_pgprot;
> +	mem_types[MT_MEMORY_NONCACHED].prot_sect |= ecc_mask | cp->pmd;
> +	mem_types[MT_MEMORY_NONCACHED].prot_pte |= kern_pgprot;

This is wrong - it will result in the non-cached memory mapped in as
sections having the same cache settings as MT_MEMORY - in other
words, probably write back.



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