Changeset 7918fce in mainline for kernel/generic/include/ipc/ipc.h

Timestamp:

2007-07-11T20:31:45Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

975f62f

Parents:

398d967

Message:

Implement a new mechanism for copying data between two address spaces based on
IPC. New system method IPC_M_DATA_SEND is introduced. The implementation is
generic and does not make use of any possible architecture optimizations such as
direct copy from one address space to another.

File:

• kernel/generic/include/ipc/ipc.h (modified) (2 diffs)

kernel/generic/include/ipc/ipc.h

@@ -139 +139 @@
 #define IPC_M_PHONE_HUNGUP      3
 
-/** Send as_area over IPC 
- * - ARG1 - src as_area base address
- * - ARG2 - size of src as_area (filled automatically by kernel)
+/** Send as_area over IPC.
+ * - ARG1 - source as_area base address
+ * - ARG2 - size of source as_area (filled automatically by kernel)
  * - ARG3 - flags of the as_area being sent
  * 
- * on answer:
+ * on answer, the recipient must set:
  * - ARG1 - dst as_area base adress
  */
 #define IPC_M_AS_AREA_SEND      4       
 
-/** Get as_area over IPC
- * - ARG1 - dst as_area base address
- * - ARG2 - dst as_area size
+/** Receive as_area over IPC.
+ * - ARG1 - destination as_area base address
+ * - ARG2 - destination as_area size
  * - ARG3 - user defined argument
  * 
- * on answer, the server must set:
- *
- * - ARG1 - src as_area base address
+ * on answer, the recipient must set:
+ *
+ * - ARG1 - source as_area base address
  * - ARG2 - flags that will be used for sharing
  */
 #define IPC_M_AS_AREA_RECV      5       
 
+/** Send data to another address space over IPC.
+ * - ARG1 - destination address space virtual address, may be overriden by the
+ *          recipient
+ * - ARG2 - source address space virtual address
+ * - ARG3 - size of data to be copied, may be overriden by the recipient
+ *
+ * on answer, the recipient must set:
+ *
+ * - ARG1 - final destination address space virtual address
+ * - ARG3 - final size of data to be copied
+ */
+#define IPC_M_DATA_SEND         6
 
 /* Well-known methods */
@@ -243 +255 @@
         /** Data passed from/to userspace. */
         ipc_data_t data;
+
+        /** Buffer for IPC_M_DATA_SEND. */
+        uint8_t *buffer;
 } call_t;