2004-07-15 Jay Monkman

	* ChangeLog, Makefile.am, clock/.cvsignore, clock/clockdrv.c,
	include/mc9328mxl.h, irq/.cvsignore, irq/bsp_irq_asm.S,
	irq/bsp_irq_init.c, irq/irq.c, irq/irq.h, timer/.cvsignore,
	timer/timer.c: New files.

1 files changed, 145 insertions, 0 deletions

diff --git a/c/src/lib/libcpu/arm/mc9328mxl/clock/clockdrv.c b/c/src/lib/libcpu/arm/mc9328mxl/clock/clockdrv.c
new file mode 100644
index 0000000000..4d26cb0251
--- /dev/null
+++ b/c/src/lib/libcpu/arm/mc9328mxl/clock/clockdrv.c
@@ -0,0 +1,145 @@
+/*
+ *  MC9328MXL clock specific using the System Timer
+ *
+ *  This is hardware specific part of the clock driver. At the end of this
+ *  file, the generic part of the driver is #included.
+ *
+ *  Copyright (c) 2004 by Cogent Computer Systems
+ *  Written by Jay Monkman <jtm@lopingdog.com>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *
+ *  http://www.OARcorp.com/rtems/license.html.
+ *
+ *
+ *  clockdrv.c,v 1.1 2002/11/13 17:55:04 joel Exp
+*/
+#include <rtems.h>
+#include <bsp.h>
+#include <irq.h>
+#include <mc9328mxl.h>
+
+/* this is defined in ../../../shared/clockdrv_shell.c */
+rtems_isr Clock_isr(rtems_vector_number vector);
+static void clock_isr_on(const rtems_irq_connect_data *unused);
+static void clock_isr_off(const rtems_irq_connect_data *unused);
+static int clock_isr_is_on(const rtems_irq_connect_data *irq);
+
+/* Replace the first value with the clock's interrupt name. */
+rtems_irq_connect_data clock_isr_data = {BSP_INT_TIMER1,
+                                         (rtems_irq_hdl)Clock_isr,
+                                         clock_isr_on,
+                                         clock_isr_off,
+                                         clock_isr_is_on,
+                                         3,     /* unused for ARM cpus */
+                                         0 };   /* unused for ARM cpus */
+
+/* If you follow the code, this is never used, so any value 
+ * should work
+ */
+#define CLOCK_VECTOR 0
+
+    
+/**
+ * When we get the clock interrupt
+ *    - clear the interrupt bit?
+ *    - restart the timer?
+ */
+#define Clock_driver_support_at_tick()                \
+  do {                                                \
+        uint32_t reg;                                 \
+        reg = MC9328MXL_TMR1_TSTAT;                   \
+        MC9328MXL_TMR1_TSTAT = 0;                     \
+  } while(0)
+
+
+/**
+ * Installs the clock ISR. You shouldn't need to change this.
+ */
+#define Clock_driver_support_install_isr( _new, _old )                      \
+  do {                                                                      \
+      BSP_install_rtems_irq_handler(&clock_isr_data);                       \
+     } while(0)
+
+
+/**
+ * Initialize the hardware for the clock
+ *   - Set the frequency
+ *   - enable it
+ *   - clear any pending interrupts
+ *
+ * Since you may want the clock always running, you can 
+ * enable interrupts here. If you do so, the clock_isr_on(),
+ * clock_isr_off(), and clock_isr_is_on() functions can be 
+ * NOPs.
+ */
+#define Clock_driver_support_initialize_hardware() \
+  do { \
+        int freq; \
+        int cnt; \
+        freq = get_perclk1_freq(); \
+        printk("perclk1 freq is %d\n", freq); \
+        cnt = ((freq / 1000) * BSP_Configuration.microseconds_per_tick) / 1000;\
+        printk("cnt freq is %d\n", cnt); \
+        MC9328MXL_TMR1_TCMP = cnt; \
+        /* use PERCLK1 as input, enable timer */ \
+        MC9328MXL_TMR1_TCTL = (MC9328MXL_TMR_TCTL_CLKSRC_PCLK1 | \
+                               MC9328MXL_TMR_TCTL_TEN | \
+                               MC9328MXL_TMR_TCTL_IRQEN); \
+        /* set prescaler to 1 (register value + 1) */ \
+        MC9328MXL_TMR1_TPRER = 0; \
+     } while (0)
+
+/**
+ * Do whatever you need to shut the clock down and remove the 
+ * interrupt handler. Since this normally only gets called on
+ * RTEMS shutdown, you may not need to do anything other than
+ * remove the ISR.
+ */
+#define Clock_driver_support_shutdown_hardware()                        \
+  do {                                                                  \
+        /* Disable timer */ \
+        MC9328MXL_TMR1_TCTL = 0; \
+	BSP_remove_rtems_irq_handler(&clock_isr_data);                  \
+     } while (0)
+
+/**
+ * Enables clock interrupt.
+ *
+ * If the interrupt is always on, this can be a NOP.
+ */
+static void clock_isr_on(const rtems_irq_connect_data *unused)
+{
+    MC9328MXL_TMR1_TCTL |= MC9328MXL_TMR_TCTL_IRQEN;
+    MC9328MXL_AITC_INTENNUM = MC9328MXL_INT_TIMER1;
+
+    return;
+}
+
+/**
+ * Disables clock interrupts
+ *
+ * If the interrupt is always on, this can be a NOP.
+ */
+static void clock_isr_off(const rtems_irq_connect_data *unused)
+{
+    MC9328MXL_TMR1_TCTL &= ~MC9328MXL_TMR_TCTL_IRQEN;
+    MC9328MXL_AITC_INTDISNUM = MC9328MXL_INT_TIMER1;
+    return;
+}
+
+/**
+ * Tests to see if clock interrupt is enabled, and returns 1 if so.
+ * If interrupt is not enabled, returns 0.
+ *
+ * If the interrupt is always on, this always returns 1.
+ */
+static int clock_isr_is_on(const rtems_irq_connect_data *irq)
+{
+    return MC9328MXL_TMR1_TCTL & MC9328MXL_TMR_TCTL_IRQEN;
+}
+
+
+/* Make sure to include this, and only at the end of the file */
+#include "../../../../libbsp/shared/clockdrv_shell.c"