Changeset 407 for trunk/hal/tsar_mips32/drivers/soclib_tty.h

Timestamp:

Nov 7, 2017, 3:08:12 PM (6 years ago)

Author:

alain

Message:

First implementation of fork/exec.

File:

• trunk/hal/tsar_mips32/drivers/soclib_tty.h (modified) (3 diffs)

trunk/hal/tsar_mips32/drivers/soclib_tty.h

@@ -38 +38 @@
  ***************************************************************************************/
 
-#define TTY_WRITE_REG          0
-#define TTY_STATUS_REG         1
-#define TTY_READ_REG           2
-#define TTY_CONFIG_REG         3
+#define TTY_WRITE              0
+#define TTY_STATUS             1
+#define TTY_READ               2
+#define TTY_RX_IRQ_ENABLE      3
+#define TTY_TX_IRQ_ENABLE      4
 
-#define TTY_SPAN               4       // number of registers per channel
+#define TTY_SPAN               8       // number of registers per channel
 
 /****************************************************************************************
@@ -51 +52 @@
 #define TTY_STATUS_RX_FULL     1       // TTY_READ_REG full if 1
 #define TTY_STATUS_TX_FULL     2       // TTY_WRITE_REG full if 1
-
-/****************************************************************************************
- * masks for TTY_CONFIG_REG
- ***************************************************************************************/
-
-#define TTY_CONFIG_RX_ENABLE   1       // TTY_RX IRQ enabled if 1
-#define TTY_CONFIG_TX_ENABLE   2       // TTY_TX IRQ enabled if 1
 
 /****************************************************************************************
@@ -68 +62 @@
 
 /****************************************************************************************
- * This function handles the command registered in the thread descriptor identified
- * by the <xp_thread> argument.
- * - For the TXT_READ and TXT_WRITE commands, it only unmask the proper TTY_RX / TTY_TX
- *   IRQ, and blocks the TXT device server thread on the THREAD_BLOCKED_DEV_ISR, as the
- *   data transfer is done by the ISR.
- * - For the TXT_SYNC_READ command, that should be only used by the kernel do display
- *   log or debug messages, it directly access the SOCLIB_TTY registers, using
- *   a busy waiting policy if required.
- ****************************************************************************************
+ * This function implements the TXT_READ & TXT_WRITE commands registered in the client
+ * thread descriptor (in the txt_cmd field), identified by the <xp_thread> argument.
+ * Depending on the command type, it only unmasks the relevant TTY_RX / TTY_TX IRQ,
+ * and blocks the TXT device server thread on the THREAD_BLOCKED_DEV_ISR, as the data
+ * transfer is done by the ISR.
+ * ****************************************************************************************
  * @ thread_xp : extended pointer on client thread descriptor.
  ***************************************************************************************/
 void soclib_tty_cmd( xptr_t thread_xp );
+
+/****************************************************************************************
+ * This function implements the TXT_SYNC_WRITE command registered in the txt_aux_t
+ * structure, using a busy waiting policy, without using the TTY IRQ.
+ * It is used by the kernel do display debug messages on TXT0 terminal, without
+ * interference with another TXT access to another terminal done by the same thread.
+ ****************************************************************************************
+ * @ thread_xp : pointer on the txt_aux_t structure containing the arguments.
+ ***************************************************************************************/
+void soclib_tty_aux( void * args );
 
 /****************************************************************************************