diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/dmv177/clock/clock.c')
-rw-r--r-- | c/src/lib/libbsp/powerpc/dmv177/clock/clock.c | 246 |
1 files changed, 0 insertions, 246 deletions
diff --git a/c/src/lib/libbsp/powerpc/dmv177/clock/clock.c b/c/src/lib/libbsp/powerpc/dmv177/clock/clock.c deleted file mode 100644 index 75490a3382..0000000000 --- a/c/src/lib/libbsp/powerpc/dmv177/clock/clock.c +++ /dev/null @@ -1,246 +0,0 @@ -/* - * Clock Tick Device Driver - * - * This routine utilizes the Decrementer Register common to the PPC family. - * - * The tick frequency is directly programmed to the configured number of - * microseconds per tick. - * - * COPYRIGHT (c) 1989-1997. - * On-Line Applications Research Corporation (OAR). - * Copyright assigned to U.S. Government, 1994. - * - * The license and distribution terms for this file may in - * the file LICENSE in this distribution or at - * http://www.OARcorp.com/rtems/license.html. - * - * $Id$ - */ - -#include <stdlib.h> - -#include <bsp.h> -#include <rtems/libio.h> - -extern rtems_cpu_table Cpu_table; - -/* - * The Real Time Clock Counter Timer uses this trap type. - */ - -#define CLOCK_VECTOR PPC_IRQ_DECREMENTER - -/* - * Clock ticks since initialization - */ - -volatile rtems_unsigned32 Clock_driver_ticks; - -/* - * This is the value programmed into the count down timer. - */ - -rtems_unsigned32 Clock_Decrementer_value; - -/* - * This is the value of the old isr routine. - */ -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_minor_number rtems_clock_minor; - -/*PAGE - * - * Clock_isr - * - * This is the clock tick interrupt handler. - * - * Input parameters: - * vector - vector number - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -rtems_isr Clock_isr( - rtems_vector_number vector, - CPU_Interrupt_frame *frame -) -{ - /* - * Set the decrementer. - */ - - PPC_Set_decrementer( Clock_Decrementer_value ); - - /* - * The driver has seen another tick. - */ - - Clock_driver_ticks += 1; - - /* - * Real Time Clock counter/timer is set to automatically reload. - */ - - rtems_clock_tick(); -} - -/*PAGE - * - * Install_clock - * - * This routine actually performs the hardware initialization for the clock. - * - * Input parameters: - * clock_isr - clock interrupt service routine entry point - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -extern int CLOCK_SPEED; - -void Install_clock( - rtems_isr_entry clock_isr -) -{ - Clock_driver_ticks = 0; - - if ( BSP_Configuration.ticks_per_timeslice ) { - Old_ticker = (rtems_isr_entry) set_vector( clock_isr, CLOCK_VECTOR, 1 ); - - PPC_Set_decrementer( Clock_Decrementer_value ); - - atexit( Clock_exit ); - } -} - -/*PAGE - * - * Clock_exit - * - * This routine allows the clock driver to exit by masking the interrupt and - * disabling the clock's counter. - * - * Input parameters: NONE - * - * Output parameters: NONE - * - * Return values: NONE - * - */ - -void Clock_exit( void ) -{ - if ( BSP_Configuration.ticks_per_timeslice ) { - - /* nothing to do */; - - /* do not restore old vector */ - } -} - -/*PAGE - * - * Clock_initialize - * - * This routine initializes the clock driver. - * - * Input parameters: - * major - clock device major number - * minor - clock device minor number - * parg - pointer to optional device driver arguments - * - * Output parameters: NONE - * - * Return values: - * rtems_device_driver status code - */ - -rtems_device_driver Clock_initialize( - rtems_device_major_number major, - rtems_device_minor_number minor, - void *pargp -) -{ - Clock_Decrementer_value = Cpu_table.clicks_per_usec * - BSP_Configuration.microseconds_per_tick; - - 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; -} - -/* PAGE - * - * Clock_control - * - * This routine is the clock device driver control entry point. - * - * Input parameters: - * major - clock device major number - * minor - clock device minor number - * parg - pointer to optional device driver arguments - * - * Output parameters: NONE - * - * Return values: - * rtems_device_driver status code - */ - -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, pargp ); - } - 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; -} - - - - - |