Changeset c6ae4c2 in mainline for uspace/lib/c/include/ddi.h

Timestamp:

2011-12-16T21:12:52Z (13 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c8751452

Parents:

e2718e1

Message:

implement basic DMA memory mapping routines
no persistent locking (pinning) of the DMA memory is currently implemented (this can be dangerous)
no unmapping is implemented
special allocations (< 16 MB, < 4 GB) are not supported yet

File:

• uspace/lib/c/include/ddi.h (modified) (1 diff)

uspace/lib/c/include/ddi.h

@@ -40 +40 @@
 #include <task.h>
 
-typedef struct {
-        /** Physical memory */
-        void *phys;
-        
-        /** Virtual memory */
-        void *virt;
-        
-        /** Size in pages */
-        size_t size;
-        
-        /** Mapping flags */
-        unsigned int flags;
-} dmamem_t;
+extern int device_assign_devno(void);
 
-extern int device_assign_devno(void);
 extern int physmem_map(void *, void *, size_t, unsigned int);
-extern int dmamem_map(dmamem_t *, size_t, unsigned int, unsigned int);
-extern int dmamem_unmap(dmamem_t *);
-extern int dmamem_lock(void *, void **, size_t);
-extern int dmamem_unlock(void *, size_t);
+
+extern int dmamem_map(void *, size_t, unsigned int, unsigned int, void **);
+extern int dmamem_map_anonymous(size_t, unsigned int, unsigned int, void **,
+    void **);
+extern int dmamem_unmap(void *, size_t, unsigned int);
+extern int dmamem_unmap_anonymous(void *);
+
 extern int iospace_enable(task_id_t, void *, unsigned long);
 extern int pio_enable(void *, size_t, void **);
+
 extern int register_irq(int, int, int, irq_code_t *);
 extern int unregister_irq(int, int);