From 7b9c7b4d07fd8981193a2c4ecb650566f42d1219 Mon Sep 17 00:00:00 2001 From: Russell King Date: Wed, 4 Jul 2007 21:16:33 +0100 Subject: [PATCH] [ARM] Fix non-page aligned boot time mappings AT91SAM9260 stopped booting with the recent changes to MM initialisation - it was asking for a non-aligned virtual address which caused loops to be non-terminal. Fix this by rounding virtual addresses down, but remember to include the offset in the length, and round the length up to the following page. This means that asking for a mapping of 4K starting at 2K into a page maps two pages as one would expect. Signed-off-by: Russell King --- arch/arm/mm/mmu.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index 02e050ae59f6..3b5e47dc0c97 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -527,9 +527,9 @@ void __init create_mapping(struct map_desc *md) return; } - addr = md->virtual; + addr = md->virtual & PAGE_MASK; phys = (unsigned long)__pfn_to_phys(md->pfn); - length = PAGE_ALIGN(md->length); + length = PAGE_ALIGN(md->length + (md->virtual & ~PAGE_MASK)); if (type->prot_l1 == 0 && ((addr | phys | length) & ~SECTION_MASK)) { printk(KERN_WARNING "BUG: map for 0x%08lx at 0x%08lx can not " -- GitLab