Changeset b6f9b5f1 in rtems for c/src/exec/score/cpu/c4x/c4xio.h

Timestamp:

03/01/00 18:08:53 (23 years ago)

Author:

Joel Sherrill <joel.sherrill@…>

Branches:

4.10, 4.11, 4.8, 4.9, 5, master

Children:

45a79f38

Parents:

8eacefcc

Message:

Added routines to get and set C3x IOF register. The code is conditionally
compiled and there is no comparable code for the C4x.

File:

• c/src/exec/score/cpu/c4x/c4xio.h (modified) (3 diffs)

c/src/exec/score/cpu/c4x/c4xio.h

@@ -9 +9 @@
 
 /*
- *  The following section of C4x timer code is based on C40 specific
- *  timer code from Ran Cabell <rcabell@norfolk.infi.net>.  The
- *  only C3x/C4x difference spotted was the address of the timer.
- *  The names have been changed to be more RTEMS like.
+ *  Address defines
  */
-
-struct c4x_timer {
-    volatile int tcontrol;
-    volatile int r1[3];
-    volatile int tcounter;
-    volatile int r2[3];
-    volatile int tperiod;
-};
 
 #ifdef _TMS320C40
@@ -30 +19 @@
 #endif
 
+/* XXX how portable */
+
+/* C32 Internal Control Registers */
+#define C4X_STRB0_REG   0x808064
+#define C4X_STRB1_REG   0x808068
+#define C4X_IOSTRB_REG  0x808060
+
+/* C32 Internal RAM Locations */
+/* XXX how long */
+#define C4X_RAM_BLK_0   0x87fe00
+#define C4X_RAM_BLK_1   0x87ff00
+
+/*
+ *  Data Structures to Overlay the Peripherals on the CPU
+ */
+
+struct c4x_timer {
+  volatile int tcontrol;
+  volatile int r1[3];
+  volatile int tcounter;
+  volatile int r2[3];
+  volatile int tperiod;
+};
+
+
+
+
+/*
+ *  Timer Support Routines
+ *
+ *  The following section of C4x timer code is based on C40 specific
+ *  timer code from Ran Cabell <rcabell@norfolk.infi.net>.  The
+ *  only C3x/C4x difference spotted was the address of the timer.
+ *  The names have been changed to be more RTEMS like.
+ */
+
+#define c4x_timer_get_control( _timer ) (volatile int)(_timer->tcontrol)
+
+#define c4x_timer_set_control( _timer, _value ) \
+  do { \
+     (volatile int)(_timer->tcontrol) = _value; \
+  } while (0);
+
 #define c4x_timer_start( _timer ) \
-    _timer->tcontrol=0x02c1
+    c4x_timer_set_control(_timer, 0x02c1 )
 
 #define c4x_timer_stop( _timer ) _timer->tcontrol = 0
@@ -49 +81 @@
   } while (0);
 
+/*
+ *  IO Flags
+ *
+ *  NOTE: iof on c3x, iiof on c4x 
+ */
+
+#ifdef _TMS320C40
+
+#else
+
+static inline unsigned32 c3x_get_iof( void )
+{
+  register unsigned32 iof_value;
+
+  __asm__ volatile ("ldi iof, %0" : "=r" (iof_value));
+  return iof_value;
+}
+
+static inline void c3x_set_iof( unsigned32 value )
+{
+  __asm__ volatile ("ldi  %0,iof" : : "g" (value) : "iof", "cc");
+}
+
+#endif
+
+
 #endif
 /* end if include file */