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author | Joel Sherrill <joel.sherrill@OARcorp.com> | 1996-10-15 21:39:06 +0000 |
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committer | Joel Sherrill <joel.sherrill@OARcorp.com> | 1996-10-15 21:39:06 +0000 |
commit | 39cafa5c1512073cfd998bc13d4d8daa7e734924 (patch) | |
tree | de40d2d34a57906fdd50af8ad77104eaef377713 | |
parent | added support for cpu time used field in tcb (diff) | |
download | rtems-39cafa5c1512073cfd998bc13d4d8daa7e734924.tar.bz2 |
updated to format of 3.6.0 clock drivers
-rw-r--r-- | c/src/lib/libbsp/i386/i386ex/clock/ckinit.c | 107 |
1 files changed, 83 insertions, 24 deletions
diff --git a/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c index 1d43059ac2..7352ee27b8 100644 --- a/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c +++ b/c/src/lib/libbsp/i386/i386ex/clock/ckinit.c @@ -21,33 +21,44 @@ */ #include <bsp.h> -#include <clockdrv.h> + +#include <rtems/libio.h> + #include <stdlib.h> -volatile rtems_unsigned32 Clock_driver_ticks; +#define CLOCK_VECTOR 0x20 + 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 ); -void ReInstall_clock( - rtems_isr_entry clock_isr +/* + * 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 ) { - rtems_unsigned32 isrlevel = 0; - - rtems_interrupt_disable( isrlevel ); - (void) set_vector( clock_isr, 0x20, 1 ); /* was 0x38 */ - 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( @@ -58,8 +69,7 @@ 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, 0x20, 1 ); - /* was 0x38 */ + Old_ticker = ( rtems_isr_entry ) set_vector( clock_isr, CLOCK_VECTOR, 1 ); /* The following is already set up in interns.s -> ( This is test code only... production code will move the @@ -85,9 +95,58 @@ void Install_clock( 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? */ + /* should do something here */; } } + +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; +} + |