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 | 108 |
1 files changed, 88 insertions, 20 deletions
diff --git a/c/src/lib/libbsp/i386/force386/clock/ckinit.c b/c/src/lib/libbsp/i386/force386/clock/ckinit.c index 45400dbd49..45a64f6f14 100644 --- a/c/src/lib/libbsp/i386/force386/clock/ckinit.c +++ b/c/src/lib/libbsp/i386/force386/clock/ckinit.c @@ -19,33 +19,44 @@ */ #include <bsp.h> -#include <clockdrv.h> + +#include <rtems/libio.h> + #include <stdlib.h> -volatile rtems_unsigned32 Clock_driver_ticks; +#define CLOCK_VECTOR 0x38 + rtems_unsigned32 Clock_isrs; /* ISRs until next tick */ + +volatile rtems_unsigned32 Clock_driver_ticks; + rtems_isr_entry Old_ticker; -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 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; -void ReInstall_clock( - rtems_isr_entry clock_isr +/* + * This is the ISR handler. + */ + +rtems_isr Clock_isr( + rtems_vector_number vector ) { - rtems_unsigned32 isrlevel = 0; - - rtems_interrupt_disable( isrlevel ); - (void) set_vector( clock_isr, 0x38, 1 ); - rtems_interrupt_enable( isrlevel ); + /* 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( @@ -56,7 +67,7 @@ void Install_clock( Clock_isrs = BSP_Configuration.microseconds_per_tick / 1000; if ( BSP_Configuration.ticks_per_timeslice ) { - Old_ticker = ( rtems_isr_entry ) set_vector( clock_isr, 0x38, 1 ); + 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 */ @@ -64,6 +75,17 @@ void Install_clock( atexit( Clock_exit ); } +void ReInstall_clock( + rtems_isr_entry clock_isr +) +{ + rtems_unsigned32 isrlevel = 0; + + rtems_interrupt_disable( isrlevel ); + (void) set_vector( clock_isr, CLOCK_VECTOR, 1 ); + rtems_interrupt_enable( isrlevel ); +} + void Clock_exit( void ) { if ( BSP_Configuration.ticks_per_timeslice ) { @@ -73,3 +95,49 @@ void Clock_exit( void ) } } +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_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', ' ')) + { + ReInstall_clock(args->buffer); + } + +done: + return RTEMS_SUCCESSFUL; +} |