Changeset c6ae4c2 in mainline for kernel/generic/include

Timestamp:

2011-12-16T21:12:52Z (14 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

Location:

kernel/generic/include

Files:

• ddi/ddi.h (modified) (1 diff)
• mm/page.h (modified) (1 diff)

kernel/generic/include/ddi/ddi.h

@@ -55 +55 @@
 extern void ddi_parea_register(parea_t *);
 
-extern sysarg_t sys_physmem_map(sysarg_t, sysarg_t, sysarg_t, sysarg_t);
+extern sysarg_t sys_physmem_map(uintptr_t, uintptr_t, size_t, unsigned int);
+
+extern sysarg_t sys_dmamem_map(uintptr_t, size_t, unsigned int, unsigned int,
+    void *);
+extern sysarg_t sys_dmamem_unmap(uintptr_t, size_t, unsigned int);
+
 extern sysarg_t sys_iospace_enable(ddi_ioarg_t *);
 

kernel/generic/include/mm/page.h

@@ -66 +66 @@
 extern uintptr_t hw_map(uintptr_t, size_t);
 
-extern sysarg_t sys_page_find_mapping(uintptr_t, uintptr_t *);
+extern int page_find_mapping(uintptr_t, void **);
+extern sysarg_t sys_page_find_mapping(uintptr_t, void *);
 
 #endif