summaryrefslogtreecommitdiffstats
path: root/c/src/lib/libcpu/mips/clock/ckinit.c
diff options
context:
space:
mode:
Diffstat (limited to 'c/src/lib/libcpu/mips/clock/ckinit.c')
-rw-r--r--c/src/lib/libcpu/mips/clock/ckinit.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/c/src/lib/libcpu/mips/clock/ckinit.c b/c/src/lib/libcpu/mips/clock/ckinit.c
deleted file mode 100644
index 9d30652376..0000000000
--- a/c/src/lib/libcpu/mips/clock/ckinit.c
+++ /dev/null
@@ -1,245 +0,0 @@
-
-/* ckinit.c
- *
- * This file contains the clock driver initialization for the IDT 4650.
- *
- * 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, 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.
- *
- * $Id$
- */
-
-#ifndef lint
-static char _sccsid[] = "@(#)ckinit.c 08/20/96 1.3\n";
-#endif
-
-#include <stdlib.h>
-
-#include <rtems.h>
-#include <rtems/libio.h>
-#include <bsp.h>
-
-#define EXT_INT5 0x8000 /* external interrupt 5 */
-
-#include "clock.h"
-
-#define CLOCKS_PER_MICROSECOND ( CPU_CLOCK_RATE_MHZ ) /* equivalent to CPU clock speed in MHz */
-
-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_INT5
-#define CLOCK_VECTOR 0x7
-
-/*
- * Clock_driver_ticks is a monotonically increasing counter of the
- * number of clock ticks since the driver was initialized.
- */
-
-volatile rtems_unsigned32 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.
- */
-
-rtems_unsigned32 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 unsigned32 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
- */
-
- /* refresh the internal CPU timer */
- mips_set_timer( mips_timer_rate );
-
- 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
-)
-{
- /* refresh the internal CPU timer */
- mips_set_timer( mips_timer_rate );
-
- 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 = BSP_Configuration.microseconds_per_tick / 1000;
-
- /*
- * If ticks_per_timeslice is configured as non-zero, then the user
- * wants a clock tick.
- */
-
- if ( BSP_Configuration.ticks_per_timeslice ) {
- Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 );
- /*
- * Hardware specific initialize goes here
- */
-
- mips_timer_rate = BSP_Configuration.microseconds_per_tick * CLOCKS_PER_MICROSECOND;
- mips_set_timer( mips_timer_rate );
- enable_int(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 )
-{
- if ( BSP_Configuration.ticks_per_timeslice ) {
-
- /* mips: turn off the timer interrupts */
- disable_int(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
-)
-{
- rtems_unsigned32 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;
-}