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updated to format of 3.6.0 clock drivers

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This commit is contained in:
Joel Sherrill
1996-10-15 21:39:06 +00:00
parent 27f0d42495
commit 39cafa5c15
1 changed files with 84 additions and 25 deletions
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109
c/src/lib/libbsp/i386/i386ex/clock/ckinit.c
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@@ -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
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
)
{
Install_clock( Clock_isr );
}
void ReInstall_clock(
rtems_isr_entry clock_isr
)
{
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;
}