Changeset 46321fb in mainline for kernel/arch/ia64/src/ddi/ddi.c

Timestamp:

2008-11-25T20:22:04Z (15 years ago)

Author:

Jakub Vana <jakub.vana@…>

Branches:

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

Children:

83d9712

Parents:

14c331a

Message:

IA64: Userspace I/O support

File:

• kernel/arch/ia64/src/ddi/ddi.c (modified) (3 diffs)

kernel/arch/ia64/src/ddi/ddi.c

@@ -1 +1 @@
 /*
- * Copyright (c) 2006 Jakub Jermar
+ * Copyright (c) 2006 Jakub Jermar, Jakub vana
  * All rights reserved.
  *
@@ -36 +36 @@
 #include <proc/task.h>
 #include <arch/types.h>
+#include <mm/slab.h>
+#include <errno.h>
+
+#define IO_MEMMAP_PAGES 16384
+#define PORTS_PER_PAGE 4
 
 /** Enable I/O space range for task.
@@ -49 +54 @@
 int ddi_iospace_enable_arch(task_t *task, uintptr_t ioaddr, size_t size)
 {
+
+        if(!task->arch.iomap)
+        {
+                uint8_t *map;
+                task->arch.iomap=malloc(sizeof(bitmap_t),0);
+                map=malloc(BITS2BYTES(IO_MEMMAP_PAGES),0);
+                if(!map)
+                        return ENOMEM;
+                bitmap_initialize(task->arch.iomap,map,IO_MEMMAP_PAGES);        
+                bitmap_clear_range(task->arch.iomap,0,IO_MEMMAP_PAGES);
+        }
+        
+        uintptr_t iopage = ioaddr / PORTS_PER_PAGE;
+        size = ALIGN_UP (size+ioaddr-4*iopage,PORTS_PER_PAGE);
+        bitmap_set_range(task->arch.iomap,iopage,size/4);
+
+
         return 0;
 }