Changeset 8cd680c in mainline for uspace/lib/c/generic/ddi.c

Timestamp:

2014-08-18T20:34:28Z (11 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:

• uspace/lib/c/generic/ddi.c (modified) (3 diffs)

uspace/lib/c/generic/ddi.c

@@ -87 +87 @@
 }
 
+/** Unmap a piece of physical memory to task.
+ *
+ * Caller of this function must have the CAP_MEM_MANAGER capability.
+ *
+ * @param virt Virtual address from the phys-mapped region.
+ *
+ * @return EOK on success.
+ * @return EPERM if the caller lacks the CAP_MEM_MANAGER capability.
+ *
+ */
+int physmem_unmap(void *virt)
+{
+        return __SYSCALL1(SYS_PHYSMEM_UNMAP, (sysarg_t) virt);
+}
+
 /** Lock a piece physical memory for DMA transfers.
  *
@@ -179 +194 @@
         
         return __SYSCALL1(SYS_IOSPACE_ENABLE, (sysarg_t) &arg);
+}
+
+/** Disable I/O space range to task.
+ *
+ * Caller of this function must have the IO_MEM_MANAGER capability.
+ *
+ * @param id     Task ID.
+ * @param ioaddr Starting address of the I/O range.
+ * @param size   Size of the range.
+ *
+ * @return EOK on success
+ * @return EPERM if the caller lacks the CAP_IO_MANAGER capability
+ * @return ENOENT if there is no task with specified ID
+ *
+ */
+static int iospace_disable(task_id_t id, void *ioaddr, size_t size)
+{
+        const ddi_ioarg_t arg = {
+                .task_id = id,
+                .ioaddr = ioaddr,
+                .size = size
+        };
+        
+        return __SYSCALL1(SYS_IOSPACE_DISABLE, (sysarg_t) &arg);
 }
 
@@ -273 +312 @@
 }
 
+/** Disable PIO for specified I/O range.
+ *
+ * @param virt     I/O start address.
+ * @param size     Size of the I/O region.
+ *
+ * @return EOK on success.
+ * @return Negative error code on failure.
+ *
+ */
+int pio_disable(void *virt, size_t size)
+{
+#ifdef IO_SPACE_BOUNDARY
+        if (virt < IO_SPACE_BOUNDARY)
+                return iospace_disable(task_get_id(), virt, size);
+#else
+        (void) iospace_disable;
+#endif
+        return physmem_unmap(virt);
+}
+
 void pio_write_8(ioport8_t *reg, uint8_t val)
 {