linux/arch/sh/include/asm/cacheflush.h, branch v3.2.51

sh: Assume new page cache pages have dirty dcache lines.

2010-12-01T06:39:51Z

This follows the ARM change c01778001a4f5ad9c62d882776235f3f31922fdd ("ARM: 6379/1: Assume new page cache pages have dirty D-cache") for the same rationale: There are places in Linux where writes to newly allocated page cache pages happen without a subsequent call to flush_dcache_page() (several PIO drivers including USB HCD). This patch changes the meaning of PG_arch_1 to be PG_dcache_clean and always flush the D-cache for a newly mapped page in update_mmu_cache(). This addresses issues seen with executing binaries from MMC, in addition to some of the other HCDs that don't explicitly do cache management for their pipe-in buffers. Requested-by: Yoshihiro Shimoda Signed-off-by: Paul Mundt

sh: Fix up flush_cache_vmap() on SMP.

2010-03-04T07:47:30Z

flush_cache_all() uses broadcast IPIs, so we can't wrap in to that when IRQs are disabled. The local cache flush manages to do what we need here anyways, so just switch to that. Signed-off-by: Paul Mundt

sh: add mm API for DMA to vmalloc/vmap areas

2010-02-05T18:32:34Z

Signed-off-by: James Bottomley

block: add helpers to run flush_dcache_page() against a bio and a request's pages

2009-11-26T08:16:19Z

Mtdblock driver doesn't call flush_dcache_page for pages in request. So, this causes problems on architectures where the icache doesn't fill from the dcache or with dcache aliases. The patch fixes this. The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid pointless empty cache-thrashing loops on architectures for which flush_dcache_page() is a no-op. Every architecture was provided with this flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is equal 1 or do nothing otherwise. See "fix mtd_blkdevs problem with caches on some architectures" discussion on LKML for more information. Signed-off-by: Ilya Loginov Cc: Ingo Molnar Cc: David Woodhouse Cc: Peter Horton Cc: "Ed L. Cashin" Signed-off-by: Jens Axboe

sh: Fix up and optimize the kmap_coherent() interface.

2009-09-03T08:21:10Z

This fixes up the kmap_coherent/kunmap_coherent() interface for recent changes both in the page fault path and the shared cache flushers, as well as adding in some optimizations. One of the key things to note here is that the TLB flush itself is deferred until the unmap, and the call in to update_mmu_cache() itself goes away, relying on the regular page fault path to handle the lazy dcache writeback if necessary. Signed-off-by: Paul Mundt

sh: Make cache flushers SMP-aware.

2009-08-21T08:23:14Z

This does a bit of rework for making the cache flushers SMP-aware. The function pointer-based flushers are renamed to local variants with the exported interface being commonly implemented and wrapping as necessary. Signed-off-by: Paul Mundt

sh: Kill off unused cpu/cacheflush.h.

2009-08-21T07:20:57Z

All CPU-specific overloads are done at runtime now, so this common header can go away and simply be folded back in to asm/ version. Signed-off-by: Paul Mundt

sh: Migrate SH-4 cacheflush ops to function pointers.

2009-08-15T03:29:49Z

This paves the way for allowing individual CPUs to overload the individual flushing routines that they care about without having to depend on weak aliases. SH-4 is converted over initially, as it wires up pretty much everything. The majority of the other CPUs will simply use the default no-op implementation with their own region flushers wired up. Signed-off-by: Paul Mundt

sh: Kill off unused flush_icache_user_range().

2009-08-15T02:38:05Z

We use flush_cache_page() outright in copy_to_user_page(), and nothing else needs it, so just kill it off. SH-5 still defines its own version, but that too will go away in the same fashion once it converts over. Signed-off-by: Paul Mundt

sh: consolidate flush_dcache_mmap_lock/unlock() definitions.

2009-08-15T02:25:32Z

All of the flush_dcache_mmap_lock()/flush_dcache_mmap_unlock() definitions are identical across all CPUs, so just provide them generically in asm/cacheflush.h. Signed-off-by: Paul Mundt