sh: Add SH-5 support to the consistent DMA impl.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 28 insertions, 18 deletions

diff --git a/arch/sh/mm/consistent.c b/arch/sh/mm/consistent.c
index e220c29a3c00..65ad30031ad7 100644
--- a/arch/sh/mm/consistent.c
+++ b/arch/sh/mm/consistent.c
@@ -1,7 +1,7 @@
 /*
  * arch/sh/mm/consistent.c
  *
- * Copyright (C) 2004  Paul Mundt
+ * Copyright (C) 2004 - 2007  Paul Mundt
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
@@ -16,7 +16,7 @@
 void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
 {
         struct page *page, *end, *free;
-        void *ret;
+        void *ret, *vp;
         int order;
 
         size = PAGE_ALIGN(size);
@@ -28,13 +28,20 @@ void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
         split_page(page, order);
 
         ret = page_address(page);
-        memset(ret, 0, size);
         *handle = virt_to_phys(ret);
 
+        vp = ioremap_nocache(*handle, size);
+        if (!vp) {
+                free_pages((unsigned long)ret, order);
+                return NULL;
+        }
+
+        memset(vp, 0, size);
+
         /*
          * We must flush the cache before we pass it on to the device
          */
-        __flush_purge_region(ret, size);
+        dma_cache_sync(NULL, ret, size, DMA_BIDIRECTIONAL);
 
         page = virt_to_page(ret);
         free = page + (size >> PAGE_SHIFT);
@@ -47,24 +54,31 @@ void *consistent_alloc(gfp_t gfp, size_t size, dma_addr_t *handle)
                 }
         }
 
-        return P2SEGADDR(ret);
+        return vp;
 }
+EXPORT_SYMBOL(consistent_alloc);
 
-void consistent_free(void *vaddr, size_t size)
+void consistent_free(void *vaddr, size_t size, dma_addr_t dma_handle)
 {
-        unsigned long addr = P1SEGADDR((unsigned long)vaddr);
-        struct page *page=virt_to_page(addr);
-        int num_pages=(size+PAGE_SIZE-1) >> PAGE_SHIFT;
-        int i;
+        struct page *page;
+        unsigned long addr;
 
-        for(i=0;i<num_pages;i++) {
-                __free_page((page+i));
-        }
+        addr = (unsigned long)phys_to_virt((unsigned long)dma_handle);
+        page = virt_to_page(addr);
+
+        free_pages(addr, get_order(size));
+
+        iounmap(vaddr);
 }
+EXPORT_SYMBOL(consistent_free);
 
 void consistent_sync(void *vaddr, size_t size, int direction)
 {
-        void * p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
+#ifdef CONFIG_CPU_SH5
+        void *p1addr = vaddr;
+#else
+        void *p1addr = (void*) P1SEGADDR((unsigned long)vaddr);
+#endif
 
         switch (direction) {
         case DMA_FROM_DEVICE:           /* invalidate only */
@@ -80,8 +94,4 @@ void consistent_sync(void *vaddr, size_t size, int direction)
                 BUG();
         }
 }
-
-EXPORT_SYMBOL(consistent_alloc);
-EXPORT_SYMBOL(consistent_free);
 EXPORT_SYMBOL(consistent_sync);
-