Support for variable length names added to Object Handler. This supports

both fixed length "raw" names and strings from the API's point of view.

Both inline and macro implementations were tested.

1 files changed, 215 insertions, 0 deletions

diff --git a/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c
new file mode 100644
index 0000000000..fc17de4cc8
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/ppc403/clock/clock.c
@@ -0,0 +1,215 @@
+/*  clock.c
+ *
+ *  This routine initializes the interval timer on the
+ *  PowerPC 403 CPU.  The tick frequency is specified by the bsp.
+ *
+ *  Author:	Andrew Bray <andy@i-cubed.demon.co.uk>
+ *
+ *  COPYRIGHT (c) 1995 by i-cubed ltd.
+ *
+ *  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 i-cubed limited not be used in
+ *      advertising or publicity pertaining to distribution of the
+ *      software without specific, written prior permission.
+ *      i-cubed limited makes no representations about the suitability
+ *      of this software for any purpose.
+ *
+ *  Derived from c/src/lib/libcpu/hppa1_1/clock/clock.c:
+ *
+ *  COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994.
+ *  On-Line Applications Research Corporation (OAR).
+ *  All rights assigned to U.S. Government, 1994.
+ *
+ *  This material may be reproduced by or for the U.S. Government pursuant
+ *  to the copyright license under the clause at DFARS 252.227-7013.  This
+ *  notice must appear in all copies of this file and its derivatives.
+ *
+ *  clock.c,v 1.2 1995/05/31 16:59:06 joel Exp
+ */
+
+#include <bsp.h>
+#include <clockdrv.h>
+
+#include <stdlib.h>                     /* for atexit() */
+
+extern rtems_cpu_table           Cpu_table;             /* owned by BSP */
+
+volatile rtems_unsigned32 Clock_driver_ticks;
+static rtems_unsigned32 pit_value, tick_time;
+static rtems_boolean auto_restart;
+
+rtems_device_driver Clock_initialize(
+  rtems_device_major_number major,
+  rtems_device_minor_number minor,
+  void *pargp,
+  rtems_id tid,
+  rtems_unsigned32 *rval
+)
+{
+    Install_clock(Clock_isr);
+}
+
+
+void
+ReInstall_clock(rtems_isr_entry new_clock_isr)
+{
+    rtems_isr_entry previous_isr;
+    rtems_unsigned32 isrlevel = 0;
+
+    rtems_interrupt_disable(isrlevel);
+    
+    rtems_interrupt_catch(new_clock_isr, PPC_IRQ_PIT,
+			  &previous_isr);
+
+    rtems_interrupt_enable(isrlevel);
+}
+
+static INLINE rtems_unsigned32 get_itimer(void)
+{
+    register rtems_unsigned32 rc;
+
+    asm volatile ("mftblo %0" : "=r" ((rc)));
+
+    return rc;
+}
+
+void Install_clock(rtems_isr_entry clock_isr)
+{
+    rtems_isr_entry previous_isr;
+    rtems_unsigned32 pvr, iocr;
+
+    Clock_driver_ticks = 0;
+
+    asm volatile ("mfiocr %0" : "=r" (iocr));
+    iocr &= ~4;
+    iocr |= 4;  /* Select external timer clock */
+    asm volatile ("mtiocr %0" : "=r" (iocr) : "0" (iocr));
+
+    asm volatile ("mfpvr %0" : "=r" ((pvr)));
+
+    if (((pvr & 0xffff0000) >> 16) != 0x0020)
+	return; /* Not a ppc403 */
+
+    if ((pvr & 0xff00) == 0x0000) /* 403GA */
+	auto_restart = (pvr & 0x00f0) > 0x0000 ? 1 : 0;
+    else if ((pvr & 0xff00) == 0x0100) /* 403GB */
+	auto_restart = 1;
+
+    pit_value = BSP_Configuration.microseconds_per_tick *
+	Cpu_table.clicks_per_usec;
+
+    if (BSP_Configuration.ticks_per_timeslice)
+    {
+	register rtems_unsigned32 tcr;
+        /*
+         * initialize the interval here
+         * First tick is set to right amount of time in the future
+         * Future ticks will be incremented over last value set
+         * in order to provide consistent clicks in the face of
+         * interrupt overhead
+         */
+
+	rtems_interrupt_catch(clock_isr, PPC_IRQ_PIT,
+			      &previous_isr);
+
+	asm volatile ("mtpit %0" : : "r" (pit_value));
+
+	asm volatile ("mftcr %0" : "=r" ((tcr)));
+
+	tcr &= ~ 0x04400000;
+
+	tcr |= (auto_restart ? 0x04400000 : 0x04000000);
+
+	tick_time = get_itimer() + pit_value;
+
+	asm volatile ("mttcr %0" : "=r" ((tcr)) : "0" ((tcr)));
+    }
+    atexit(Clock_exit);
+}
+
+
+rtems_isr
+Clock_isr(rtems_vector_number vector)
+{
+    if (!auto_restart)
+	{
+	    rtems_unsigned32 clicks_til_next_interrupt;
+	    rtems_unsigned32 itimer_value;
+
+	    /*
+	     * setup for next interrupt; making sure the new value is reasonably
+	     * in the future.... in case we lost out on an interrupt somehow
+	     */
+
+	    itimer_value = get_itimer();
+	    tick_time += pit_value;
+
+	    /*
+	     * how far away is next interrupt *really*
+	     * It may be a long time; this subtraction works even if
+	     * Clock_clicks_interrupt < Clock_clicks_low_order via
+	     * the miracle of unsigned math.
+	     */
+	    clicks_til_next_interrupt = tick_time - itimer_value;
+
+	    /*
+	     * If it is too soon then bump it up.
+	     * This should only happen if CPU_HPPA_CLICKS_PER_TICK is too small.
+	     * But setting it low is useful for debug, so...
+	     */
+
+	    if (clicks_til_next_interrupt < 400)
+		{
+		    tick_time = itimer_value + 1000;
+		    clicks_til_next_interrupt = 1000;
+		    /* XXX: count these! this should be rare */
+		}
+
+	    /*
+	     * If it is too late, that means we missed the interrupt somehow.
+	     * Rather than wait 35-50s for a wrap, we just fudge it here.
+	     */
+	    
+	    if (clicks_til_next_interrupt > pit_value)
+		{
+		    tick_time = itimer_value + 1000;
+		    clicks_til_next_interrupt = 1000;
+		    /* XXX: count these! this should never happen :-) */
+		}
+
+	    asm volatile ("mtpit %0" :: "r" (clicks_til_next_interrupt));
+	}
+
+    asm volatile ( "mttsr %0" :: "r" (0x08000000));
+
+    Clock_driver_ticks++;
+
+    rtems_clock_tick();
+}
+
+/*
+ * Called via atexit()
+ * Remove the clock interrupt handler by setting handler to NULL
+ */
+
+void
+Clock_exit(void)
+{
+    if ( BSP_Configuration.ticks_per_timeslice )
+    {
+	register rtems_unsigned32 tcr;
+
+	asm volatile ("mftcr %0" : "=r" ((tcr)));
+
+	tcr &= ~ 0x04400000;
+
+	asm volatile ("mttcr %0" : "=r" ((tcr)) : "0" ((tcr)));
+
+        (void) set_vector(0, PPC_IRQ_PIT, 1);
+    }
+}
+