- Add bounce pages for arm, largely based on the i386 implementation.

- Add a default parent dma tag, similar to what has been done for sparc64.
- Before invalidating the dcache in POSTREAD, save the bits which are in the
same cachelines than our buffers, but not part of it, and restore them after
the invalidation.

3 files changed, 6 insertions, 1 deletions

diff --git a/sys/arm/include/bus_dma.h b/sys/arm/include/bus_dma.h
index f239197..55edee9 100644
--- a/sys/arm/include/bus_dma.h
+++ b/sys/arm/include/bus_dma.h
@@ -101,6 +101,8 @@ struct arm32_dma_range {
 struct arm32_dma_range	*bus_dma_get_range(void);
 int	bus_dma_get_range_nb(void);
 
+extern bus_dma_tag_t arm_root_dma_tag;
+
 #endif /* _ARM32_BUS_DMA_PRIVATE */
 
 #endif /* _ARM_BUS_DMA_H */
diff --git a/sys/arm/include/md_var.h b/sys/arm/include/md_var.h
index 868b5bc..3271803 100644
--- a/sys/arm/include/md_var.h
+++ b/sys/arm/include/md_var.h
@@ -46,4 +46,7 @@ extern int _min_bzero_size;
 #define SRC_IS_USER	0x2
 #define IS_PHYSICAL	0x4
 
+extern int busdma_swi_pending;
+void busdma_swi(void);
+
 #endif /* !_MACHINE_MD_VAR_H_ */
diff --git a/sys/arm/include/pmap.h b/sys/arm/include/pmap.h
index 47b3a4c..bf7de7c 100644
--- a/sys/arm/include/pmap.h
+++ b/sys/arm/include/pmap.h
@@ -537,7 +537,7 @@ struct arm_small_page {
 
 #endif
 
-#define ARM_NOCACHE_KVA_SIZE 0x600000
+#define ARM_NOCACHE_KVA_SIZE 0x1000000
 extern vm_offset_t arm_nocache_startaddr;
 void *arm_remap_nocache(void *, vm_size_t);
 void arm_unmap_nocache(void *, vm_size_t);