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[ARM] 4134/1: Add generic support for outer caches

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The outer cache can be L2 as on RealView/EB MPCore platform or even L3
or further on ARMv7 cores. This patch adds the generic support for
flushing the outer cache in the DMA operations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas
2007-02-05 14:48:08 +01:00
committed by Russell King
parent 7f8e33546d
commit 953233dc99
5 changed files with 50 additions and 0 deletions
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6
arch/arm/mm/consistent.c
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@@ -208,6 +208,7 @@ __dma_alloc(struct device *dev, size_t size, dma_addr_t *handle, gfp_t gfp,
unsigned long kaddr = (unsigned long)page_address(page);
memset(page_address(page), 0, size);
dmac_flush_range(kaddr, kaddr + size);
outer_flush_range(__pa(kaddr), __pa(kaddr) + size);
}
/*
@@ -485,15 +486,20 @@ void consistent_sync(void *vaddr, size_t size, int direction)
unsigned long start = (unsigned long)vaddr;
unsigned long end = start + size;
BUG_ON(!virt_addr_valid(start) || !virt_addr_valid(end));
switch (direction) {
case DMA_FROM_DEVICE: /* invalidate only */
dmac_inv_range(start, end);
outer_inv_range(__pa(start), __pa(end));
break;
case DMA_TO_DEVICE: /* writeback only */
dmac_clean_range(start, end);
outer_clean_range(__pa(start), __pa(end));
break;
case DMA_BIDIRECTIONAL: /* writeback and invalidate */
dmac_flush_range(start, end);
outer_flush_range(__pa(start), __pa(end));
break;
default:
BUG();