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Diffstat (limited to '')
-rw-r--r-- | c/src/lib/libcpu/mips64orion/clock/ckinit.c | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/c/src/lib/libcpu/mips64orion/clock/ckinit.c b/c/src/lib/libcpu/mips64orion/clock/ckinit.c deleted file mode 100644 index d191d3086d..0000000000 --- a/c/src/lib/libcpu/mips64orion/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) 1989-1999. - * 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.rtems.com/license/LICENSE. - * - * $Id$ - */ - -/* - * 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_INT5 0x8000 /* 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 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 = rtems_configuration_get_milliseconds_per_tick(); - - Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 ); - /* - * Hardware specific initialize goes here - */ - - mips_timer_rate = - rtems_configuration_get_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 ) -{ - /* 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; -} |