Changeset 8cd680c in mainline for kernel/arch/amd64/src/ddi/ddi.c

Timestamp:

2014-08-18T20:34:28Z (10 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

6eeb4a3

Parents:

8820544

Message:

Add pio_disable().

• Implement *iospace_disable*().
• Implement physmem_unmap().

File:

• kernel/arch/amd64/src/ddi/ddi.c (modified) (2 diffs)

kernel/arch/amd64/src/ddi/ddi.c

@@ -51 +51 @@
  *
  * @param task   Task.
- * @param ioaddr Startign I/O space address.
+ * @param ioaddr Starting I/O space address.
  * @param size   Size of the enabled I/O range.
  *
- * @return 0 on success or an error code from errno.h.
+ * @return EOK on success or an error code from errno.h.
  *
  */
@@ -106 +106 @@
         task->arch.iomapver++;
         
+        return EOK;
+}
+
+/** Disable I/O space range for task.
+ *
+ * Interrupts are disabled and task is locked.
+ *
+ * @param task   Task.
+ * @param ioaddr Starting I/O space address.
+ * @param size   Size of the enabled I/O range.
+ *
+ * @return EOK on success or an error code from errno.h.
+ *
+ */
+int ddi_iospace_disable_arch(task_t *task, uintptr_t ioaddr, size_t size)
+{
+        size_t elements = ioaddr + size;
+        if (elements > IO_PORTS)
+                return ENOENT;
+        
+        if (ioaddr >= task->arch.iomap.elements)
+                return EINVAL;  
+
+        if (task->arch.iomap.elements < elements)
+                size -= elements - task->arch.iomap.elements;
+
+        /*
+         * Disable the range.
+         */
+        bitmap_set_range(&task->arch.iomap, (size_t) ioaddr, size);
+        
+        /*
+         * Increment I/O Permission bitmap generation counter.
+         */
+        task->arch.iomapver++;
+        
         return 0;
 }