diff options
Diffstat (limited to 'arch/sh64/mm')
| -rw-r--r-- | arch/sh64/mm/Makefile | 4 | ||||
| -rw-r--r-- | arch/sh64/mm/consistent.c | 52 |
2 files changed, 54 insertions, 2 deletions
diff --git a/arch/sh64/mm/Makefile b/arch/sh64/mm/Makefile index ff19378ac90a..d0e813632480 100644 --- a/arch/sh64/mm/Makefile +++ b/arch/sh64/mm/Makefile @@ -13,7 +13,8 @@ # unless it's something special (ie not a .c file). # -obj-y := init.o fault.o ioremap.o extable.o cache.o tlbmiss.o tlb.o +obj-y := cache.o consistent.o extable.o fault.o init.o ioremap.o \ + tlbmiss.o tlb.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o @@ -41,4 +42,3 @@ CFLAGS_tlbmiss.o += -ffixed-r7 \ -ffixed-r41 -ffixed-r42 -ffixed-r43 \ -ffixed-r60 -ffixed-r61 -ffixed-r62 \ -fomit-frame-pointer - diff --git a/arch/sh64/mm/consistent.c b/arch/sh64/mm/consistent.c new file mode 100644 index 000000000000..8875a2a40da7 --- /dev/null +++ b/arch/sh64/mm/consistent.c @@ -0,0 +1,52 @@ +/* + * Copyright (C) 2001 David J. Mckay (david.mckay@st.com) + * Copyright (C) 2003 Paul Mundt (lethal@linux-sh.org) + * + * May be copied or modified under the terms of the GNU General Public + * License. See linux/COPYING for more information. + * + * Dynamic DMA mapping support. + */ +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/string.h> +#include <linux/pci.h> +#include <linux/module.h> +#include <asm/io.h> + +void *consistent_alloc(struct pci_dev *hwdev, size_t size, + dma_addr_t *dma_handle) +{ + void *ret; + int gfp = GFP_ATOMIC; + void *vp; + + if (hwdev == NULL || hwdev->dma_mask != 0xffffffff) + gfp |= GFP_DMA; + + ret = (void *)__get_free_pages(gfp, get_order(size)); + + /* now call our friend ioremap_nocache to give us an uncached area */ + vp = ioremap_nocache(virt_to_phys(ret), size); + + if (vp != NULL) { + memset(vp, 0, size); + *dma_handle = virt_to_phys(ret); + dma_cache_wback_inv((unsigned long)ret, size); + } + + return vp; +} +EXPORT_SYMBOL(consistent_alloc); + +void consistent_free(struct pci_dev *hwdev, size_t size, + void *vaddr, dma_addr_t dma_handle) +{ + void *alloc; + + alloc = phys_to_virt((unsigned long)dma_handle); + free_pages((unsigned long)alloc, get_order(size)); + + iounmap(vaddr); +} +EXPORT_SYMBOL(consistent_free); |