diff options
Diffstat (limited to 'c/src/lib/libbsp/i386/force386/clock/ckinit.c')
-rw-r--r-- | c/src/lib/libbsp/i386/force386/clock/ckinit.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/c/src/lib/libbsp/i386/force386/clock/ckinit.c b/c/src/lib/libbsp/i386/force386/clock/ckinit.c deleted file mode 100644 index 947b777654..0000000000 --- a/c/src/lib/libbsp/i386/force386/clock/ckinit.c +++ /dev/null @@ -1,135 +0,0 @@ -/* Clock_initialize - * - * This routine initializes the Motorola MFP 68901 on the - * FORCE CPU386 board. The tick frequency is 1 millisecond. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * COPYRIGHT (c) 1989-1998. - * On-Line Applications Research Corporation (OAR). - * Copyright assigned to U.S. Government, 1994. - * - * 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. - * - * $Id$ - */ - -#include <bsp.h> - -#include <rtems/libio.h> - -#include <stdlib.h> - -#define CLOCK_VECTOR 0x38 - -rtems_unsigned32 Clock_isrs; /* ISRs until next tick */ - -volatile rtems_unsigned32 Clock_driver_ticks; - -rtems_isr_entry Old_ticker; - -void Clock_exit( void ); - -/* - * These are set by clock driver during its init - */ - -rtems_device_major_number rtems_clock_major = ~0; -rtems_device_major_number rtems_clock_minor = 0; - -/* - * This is the ISR handler. - */ - -rtems_isr Clock_isr( - rtems_vector_number vector -) -{ - /* enable_tracing(); */ - Clock_driver_ticks += 1; - if ( Clock_isrs == 1 ) { - rtems_clock_tick(); - Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000; - } - else - Clock_isrs -= 1; -} - -void Install_clock( - rtems_isr_entry clock_isr -) -{ - Clock_driver_ticks = 0; - Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000; - - if ( BSP_Configuration.ticks_per_timeslice ) { - Old_ticker = ( rtems_isr_entry ) set_vector( clock_isr, CLOCK_VECTOR, 1 ); - outport_byte( TBCR, 0x14 ); /* reset it, delay mode, 50X */ - outport_byte( TBDR, 0x50 ); /* 1 millisecond */ - outport_byte( IERA, 0x41 ); /* enable interrupt for B */ - } - atexit( Clock_exit ); -} - -void Clock_exit( void ) -{ - if ( BSP_Configuration.ticks_per_timeslice ) { - outport_byte( TBCR, 0x00 ); /* initial value */ - outport_byte( IERA, 0x40 ); /* disable interrupt */ - /* ??? Is "do not restore old vector" causing problems? */ - } -} - -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 ); - (void) set_vector( args->buffer, CLOCK_VECTOR, 1 ); - rtems_interrupt_enable( isrlevel ); - } - -done: - return RTEMS_SUCCESSFUL; -} |