Le 20/07/2017 à 08:28, Matt Brown a écrit :
The cacheflush prototypes currently use start and stop values and each call requires typecasting the address to an unsigned long. This patch changes the cacheflush prototypes to follow the x86 style of using a base and size values, with base being a void pointer. All callers of the cacheflush functions, including drivers, have been modified to conform to the new prototypes. The 64 bit cacheflush functions which were implemented in assembly code (flush_dcache_range, flush_inval_dcache_range) have been translated into C for readability and coherence. Signed-off-by: Matt Brown <matthew.brown.dev@xxxxxxxxx> --- arch/powerpc/include/asm/cacheflush.h | 47 +++++++++++++++++-------- arch/powerpc/kernel/misc_64.S | 52 ---------------------------- arch/powerpc/mm/dma-noncoherent.c | 15 ++++---- arch/powerpc/platforms/512x/mpc512x_shared.c | 10 +++--- arch/powerpc/platforms/85xx/smp.c | 6 ++-- arch/powerpc/sysdev/dart_iommu.c | 5 +-- drivers/ata/pata_bf54x.c | 3 +- drivers/char/agp/uninorth-agp.c | 6 ++-- drivers/gpu/drm/drm_cache.c | 3 +- drivers/macintosh/smu.c | 15 ++++---- drivers/mmc/host/bfin_sdh.c | 3 +- drivers/mtd/nand/bf5xx_nand.c | 6 ++-- drivers/soc/fsl/qbman/dpaa_sys.h | 2 +- drivers/soc/fsl/qbman/qman_ccsr.c | 3 +- drivers/spi/spi-bfin5xx.c | 10 +++--- drivers/tty/serial/mpsc.c | 46 ++++++++---------------- drivers/usb/musb/blackfin.c | 6 ++-- 17 files changed, 86 insertions(+), 152 deletions(-)
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diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c index 3825284..5fd3171 100644 --- a/arch/powerpc/mm/dma-noncoherent.c +++ b/arch/powerpc/mm/dma-noncoherent.c @@ -204,9 +204,9 @@ __dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *handle, gfp_t * kernel direct-mapped region for device DMA. */ { - unsigned long kaddr = (unsigned long)page_address(page); + void *kaddr = page_address(page); memset(page_address(page), 0, size); - flush_dcache_range(kaddr, kaddr + size); + flush_dcache_range(kaddr, size); }/*@@ -316,9 +316,6 @@ EXPORT_SYMBOL(__dma_free_coherent); */ void __dma_sync(void *vaddr, size_t size, int direction) { - unsigned long start = (unsigned long)vaddr; - unsigned long end = start + size; - switch (direction) { case DMA_NONE: BUG(); @@ -328,15 +325,15 @@ void __dma_sync(void *vaddr, size_t size, int direction) * the potential for discarding uncommitted data from the cache */ if ((start | end) & (L1_CACHE_BYTES - 1))
How can the above compile when 'start' and 'end' are removed ? Shouldn't it be replaced by if ((vaddr | size) & (L1_CACHE_BYTES - 1))
- flush_dcache_range(start, end); + flush_dcache_range(vaddr, size); else - invalidate_dcache_range(start, end); + invalidate_dcache_range(vaddr, size); break; case DMA_TO_DEVICE: /* writeback only */ - clean_dcache_range(start, end); + clean_dcache_range(vaddr, size); break; case DMA_BIDIRECTIONAL: /* writeback and invalidate */ - flush_dcache_range(start, end); + flush_dcache_range(vaddr, size); break; } }
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