New (Submission by Bruce Robinson <brucer@pmccorp.com>).

3 files changed, 332 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/mips/hurricane/clock/ckinit.c b/c/src/lib/libbsp/mips/hurricane/clock/ckinit.c
new file mode 100644
index 0000000000..4a906756b6
--- /dev/null
+++ b/c/src/lib/libbsp/mips/hurricane/clock/ckinit.c
@@ -0,0 +1,262 @@
+
+/*  ckinit.c
+ *
+ *  This file contains the clock driver initialization for the Hurricane BSP.
+ *
+ *  Author:     Craig Lebakken <craigl@transition.com>
+ *
+ *  COPYRIGHT (c) 1996 by Transition Networks Inc.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of Transition Networks not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      Transition Networks makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  Derived from c/src/lib/libbsp/no_cpu/no_bsp/clock/ckinit.c:
+ *
+ *  COPYRIGHT (c) 1989-1999.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  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.
+ *
+ *  $Id$
+ */
+
+/*
+ *  Rather than deleting this, it is commented out to (hopefully) help
+ *  the submitter send updates.
+ *
+ *  static char _sccsid[] = "@(#)ckinit.c 08/20/96     1.3\n";
+ */
+
+
+#include <stdlib.h>
+
+#include <rtems.h>
+#include <rtems/libio.h>
+
+#define EXT_INT1    0x800  /* external interrupt 5 */
+
+#include "clock.h"
+
+/* formerly in the BSP */
+#if 0
+#define CLOCKS_PER_MICROSECOND ( CPU_CLOCK_RATE_MHZ ) /* equivalent to CPU clock speed in MHz */
+#endif
+
+#define CLOCKS_PER_MICROSECOND \
+  rtems_cpu_configuration_get_clicks_per_microsecond()
+/* to avoid including the bsp */
+mips_isr_entry set_vector( rtems_isr_entry, rtems_vector_number, int );
+
+void USC_isr( void );
+void reset_wdt(void);
+void enable_wdi(void);
+void init_hbt(void);
+void enable_hbi(void);
+void disable_hbi(void);
+
+void Clock_exit( void );
+rtems_isr Clock_isr( rtems_vector_number vector );
+
+
+/*
+ *  The interrupt vector number associated with the clock tick device
+ *  driver.
+ */
+
+#define CLOCK_VECTOR_MASK    EXT_INT1
+#define CLOCK_VECTOR         MIPS_INTERRUPT_BASE + 0x3
+
+/*
+ *  Clock_driver_ticks is a monotonically increasing counter of the
+ *  number of clock ticks since the driver was initialized.
+ */
+
+volatile uint32_t Clock_driver_ticks;
+
+/*
+ *  Clock_isrs is the number of clock ISRs until the next invocation of
+ *  the RTEMS clock tick routine.  The clock tick device driver
+ *  gets an interrupt once a millisecond and counts down until the
+ *  length of time between the user configured microseconds per tick
+ *  has passed.
+ */
+
+uint32_t Clock_isrs;              /* ISRs until next tick */
+
+/*
+ * These are set by clock driver during its init
+ */
+ 
+rtems_device_major_number rtems_clock_major = ~0;
+rtems_device_minor_number rtems_clock_minor;
+
+/*
+ *  The previous ISR on this clock tick interrupt vector.
+ */
+
+rtems_isr_entry  Old_ticker;
+
+void Clock_exit( void );
+
+static uint32_t mips_timer_rate = 0;
+
+/*
+ *  Isr Handler
+ */
+
+rtems_isr Clock_isr(
+  rtems_vector_number vector
+)
+{
+/*
+ * bump the number of clock driver ticks since initialization
+ *
+ * determine if it is time to announce the passing of tick as configured
+ * to RTEMS through the rtems_clock_tick directive
+ *
+ * perform any timer dependent tasks
+ */
+
+  reset_wdt();		/* Reset hardware watchdog timer */
+
+  Clock_driver_ticks += 1;
+
+  rtems_clock_tick();
+}
+
+/* User callback shell (set from Clock_Control) */
+static void (*user_callback)(void);
+
+rtems_isr User_Clock_isr(
+  rtems_vector_number vector
+)
+{
+   if (user_callback)
+      user_callback();
+}
+
+/*
+ *  Install_clock
+ *
+ *  Install a clock tick handleR and reprograms the chip.  This
+ *  is used to initially establish the clock tick.
+ */
+
+void Install_clock(
+  rtems_isr_entry clock_isr
+)
+{
+	/*
+	*  Initialize the clock tick device driver variables
+	*/
+
+	Clock_driver_ticks = 0;
+	Clock_isrs = rtems_configuration_get_milliseconds_per_tick();
+
+	mips_timer_rate =
+		rtems_configuration_get_microseconds_per_tick() * CLOCKS_PER_MICROSECOND;
+
+	/*
+	*  Hardware specific initialize goes here
+	*/
+	
+	/* Set up USC heartbeat timer to generate interrupts */
+	disable_hbi();			/* Disable heartbeat interrupt in USC */
+	
+							/* Install interrupt handler */
+	Old_ticker = (rtems_isr_entry) set_vector( USC_isr, CLOCK_VECTOR, 1 );
+	
+	init_hbt();				/* Initialize heartbeat timer */
+	
+	reset_wdt();			/* Reset watchdog timer */
+	
+	enable_wdi();			/* Enable watchdog interrupt in USC */
+	
+	enable_hbi();			/* Enable heartbeat interrupt in USC */
+	
+							/* Enable USC interrupt in MIPS processor */
+	mips_enable_in_interrupt_mask(CLOCK_VECTOR_MASK);
+	
+	/*
+	*  Schedule the clock cleanup routine to execute if the application exits.
+	*/
+
+	atexit( Clock_exit );
+}
+
+/*
+ *  Clean up before the application exits
+ */
+
+void Clock_exit( void )
+{
+  /* mips: turn off the timer interrupts */
+  mips_disable_in_interrupt_mask(~CLOCK_VECTOR_MASK);
+}
+
+/*
+ *  Clock_initialize
+ *
+ *  Device driver entry point for clock tick driver initialization.
+ */
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+  Install_clock( Clock_isr );
+ 
+  /*
+   * make major/minor avail to others such as shared memory driver
+   */
+ 
+  rtems_clock_major = major;
+  rtems_clock_minor = minor;
+ 
+  return RTEMS_SUCCESSFUL;
+}
+
+rtems_device_driver Clock_control(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp
+)
+{
+    uint32_t isrlevel;
+    rtems_libio_ioctl_args_t *args = pargp;
+ 
+    if (args == 0)
+        goto done;
+ 
+    /*
+     * This is hokey, but until we get a defined interface
+     * to do this, it will just be this simple...
+     */
+ 
+    if (args->command == rtems_build_name('I', 'S', 'R', ' '))
+    {
+        Clock_isr(CLOCK_VECTOR);
+    }
+    else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
+    {
+      rtems_interrupt_disable( isrlevel );
+      user_callback = (void (*)(void))args->buffer;
+      (void) set_vector( User_Clock_isr, CLOCK_VECTOR, 1 );
+      rtems_interrupt_enable( isrlevel );
+    }
+ 
+done:
+    return RTEMS_SUCCESSFUL;
+}
diff --git a/c/src/lib/libbsp/mips/hurricane/clock/clock.S b/c/src/lib/libbsp/mips/hurricane/clock/clock.S
new file mode 100644
index 0000000000..30b823f5ba
--- /dev/null
+++ b/c/src/lib/libbsp/mips/hurricane/clock/clock.S
@@ -0,0 +1,45 @@
+/*  clock.s 
+ *
+ *  This file contains the assembly code for the Hurricane BSP clock driver.
+ *
+ *  Author:     Craig Lebakken <craigl@transition.com>
+ *
+ *  COPYRIGHT (c) 1996 by Transition Networks Inc.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of Transition Networks not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      Transition Networks makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  clock.S,v 1.5 2001/05/24 13:23:48 joel Exp
+ */
+/* @(#)clock.S       08/20/96     1.2 */
+
+#include <iregdef.h>
+#include <idtcpu.h>
+#include <asm.h>
+
+FRAME(mips_set_timer,sp,0,ra)
+	.set noreorder
+        mfc0 t0,C0_COUNT
+        nop
+        addu t0,a0,t0
+        mtc0 t0,C0_COMPARE
+        j ra
+	nop
+	.set reorder
+ENDFRAME(mips_set_timer)
+
+FRAME(mips_get_timer,sp,0,ra)
+	.set noreorder
+        mfc0 v0,C0_COUNT
+        j ra
+	nop
+	.set reorder
+ENDFRAME(mips_get_timer)
diff --git a/c/src/lib/libbsp/mips/hurricane/clock/clock.h b/c/src/lib/libbsp/mips/hurricane/clock/clock.h
new file mode 100644
index 0000000000..49f97db29f
--- /dev/null
+++ b/c/src/lib/libbsp/mips/hurricane/clock/clock.h
@@ -0,0 +1,25 @@
+/*  clock.s
+ *
+ *  This file contains the assembly code for the Hurricane BSP clock driver.
+ *
+ *  Author:     Craig Lebakken <craigl@transition.com>
+ *
+ *  COPYRIGHT (c) 1996 by Transition Networks Inc.
+ *
+ *  To anyone who acknowledges that this file is provided "AS IS"
+ *  without any express or implied warranty:
+ *      permission to use, copy, modify, and distribute this file
+ *      for any purpose is hereby granted without fee, provided that
+ *      the above copyright notice and this notice appears in all
+ *      copies, and that the name of Transition Networks not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      Transition Networks makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  clock.h,v 1.2 1996/09/11 19:14:52 joel Exp
+ */
+
+/* @(#)clock.h       08/20/96     1.2 */
+
+extern void mips_set_timer( uint32_t timer_clock_interval );