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Diffstat (limited to 'c/src/lib/libcpu/hppa1.1/clock/clock.c')
-rw-r--r--c/src/lib/libcpu/hppa1.1/clock/clock.c257
1 files changed, 0 insertions, 257 deletions
diff --git a/c/src/lib/libcpu/hppa1.1/clock/clock.c b/c/src/lib/libcpu/hppa1.1/clock/clock.c
deleted file mode 100644
index 759aafd56f..0000000000
--- a/c/src/lib/libcpu/hppa1.1/clock/clock.c
+++ /dev/null
@@ -1,257 +0,0 @@
-/* Clock
- *
- * This routine initializes the interval timer on the
- * PA-RISC CPU. The tick frequency is specified by the bsp.
- *
- * COPYRIGHT (c) 1989-1999.
- * On-Line Applications Research Corporation (OAR).
- *
- * The license and distribution terms for this file may be
- * found in the file LICENSE in this distribution or at
- * http://www.rtems.com/license/LICENSE.
- *
- * $Id$
- */
-
-#include <rtems.h>
-#include <rtems/libio.h>
-
-/* should get this from bsp.h, but it is not installed yet */
-rtems_isr_entry set_vector(rtems_isr_entry, rtems_vector_number, int);
-
-#include <stdlib.h> /* for atexit() */
-
-typedef unsigned long long hppa_click_count_t;
-
-/*
- * These are set by clock driver during its init
- */
-
-rtems_device_major_number rtems_clock_major = ~0;
-rtems_device_minor_number rtems_clock_minor;
-
-/*
- * CPU_HPPA_CLICKS_PER_TICK is either a #define or an rtems_unsigned32
- * allocated and set by bsp_start()
- */
-
-#ifndef CPU_HPPA_CLICKS_PER_TICK
-extern rtems_unsigned32 CPU_HPPA_CLICKS_PER_TICK;
-#endif
-
-volatile rtems_unsigned32 Clock_driver_ticks;
-rtems_unsigned32 Clock_isrs; /* ISRs until next tick */
-
-rtems_unsigned32 most_recent_itimer_value;
-
-rtems_unsigned64 Clock_clicks; /* running total of cycles */
-
-rtems_unsigned32 Clock_clicks_interrupt;
-
-void Clock_exit(void);
-
-void
-ReInstall_clock(rtems_isr_entry new_clock_isr)
-{
- rtems_unsigned32 isrlevel = 0;
-
- rtems_interrupt_disable(isrlevel);
- (void) set_vector(
- new_clock_isr,
- HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER,
- 1
- );
- rtems_interrupt_enable(isrlevel);
-}
-
-/*
- * read itimer and update Clock_clicks as appropriate
- */
-
-rtems_unsigned32
-Clock_read_itimer()
-{
- rtems_unsigned32 isrlevel;
- rtems_unsigned32 itimer_value;
- rtems_unsigned32 wrap_count;
- rtems_unsigned32 recent_count;
-
- rtems_interrupt_disable(isrlevel);
-
- wrap_count = (Clock_clicks & 0xFFFFFFFF00000000ULL) >> 32;
- recent_count = (rtems_unsigned32) Clock_clicks;
-
- itimer_value = get_itimer();
-
- if (itimer_value < recent_count)
- wrap_count++;
- Clock_clicks = (((rtems_unsigned64) wrap_count) << 32) + itimer_value;
-
- rtems_interrupt_enable(isrlevel);
-
- return itimer_value;
-}
-
-
-void Install_clock(rtems_isr_entry clock_isr)
-{
- Clock_driver_ticks = 0;
- Clock_clicks_interrupt = 0;
- Clock_clicks = 0;
-
- Clock_isrs = rtems_configuration_get_milliseconds_per_tick();
-
- /*
- * initialize the interval here
- * First tick is set to right amount of time in the future
- * Future ticks will be incremented over last value set
- * in order to provide consistent clicks in the face of
- * interrupt overhead
- */
-
- Clock_clicks_interrupt = Clock_read_itimer() + CPU_HPPA_CLICKS_PER_TICK;
- set_itimer((rtems_unsigned32) Clock_clicks_interrupt);
-
- (void) set_vector(clock_isr, HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER, 1);
- atexit(Clock_exit);
-}
-
-rtems_isr
-Clock_isr(rtems_vector_number vector)
-{
- rtems_unsigned32 clicks_til_next_interrupt;
- rtems_unsigned32 itimer_value;
-
- /*
- * setup for next interrupt; making sure the new value is reasonably
- * in the future.... in case we lost out on an interrupt somehow
- */
-
- itimer_value = Clock_read_itimer();
- Clock_clicks_interrupt += CPU_HPPA_CLICKS_PER_TICK;
-
- /*
- * how far away is next interrupt *really*
- * It may be a long time; this subtraction works even if
- * Clock_clicks_interrupt < Clock_clicks_low_order via
- * the miracle of unsigned math.
- */
- clicks_til_next_interrupt = Clock_clicks_interrupt - itimer_value;
-
- /*
- * If it is too soon then bump it up.
- * This should only happen if CPU_HPPA_CLICKS_PER_TICK is too small.
- * But setting it low is useful for debug, so...
- */
-
- if (clicks_til_next_interrupt < 400)
- {
- Clock_clicks_interrupt = itimer_value + 1000;
- /* XXX: count these! this should be rare */
- }
-
- /*
- * If it is too late, that means we missed the interrupt somehow.
- * Rather than wait 35-50s for a wrap, we just fudge it here.
- */
-
- if (clicks_til_next_interrupt > CPU_HPPA_CLICKS_PER_TICK)
- {
- Clock_clicks_interrupt = itimer_value + 1000;
- /* XXX: count these! this should never happen :-) */
- }
-
- set_itimer((rtems_unsigned32) Clock_clicks_interrupt);
-
- Clock_driver_ticks++;
-
- if (Clock_isrs == 1)
- {
- rtems_clock_tick();
- Clock_isrs = rtems_configuration_get_milliseconds_per_tick();
- if (Clock_isrs == 0)
- Clock_isrs = 1;
- }
- else
- Clock_isrs--;
-}
-
-/*
- * Called via atexit()
- * Remove the clock interrupt handler by setting handler to NULL
- */
-
-void
-Clock_exit(void)
-{
- (void) set_vector(0, HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER, 1);
-}
-
-/*
- * spin delay for specified number of microseconds
- * used by RTEMS delay macro
- */
-
-void
-Clock_delay(rtems_unsigned32 microseconds)
-{
- rtems_unsigned64 future_time;
-
- (void) Clock_read_itimer();
- future_time = Clock_clicks +
- ((rtems_unsigned64) microseconds) *
- rtems_cpu_configuration_get_itimer_clicks_per_microsecond();
-
- for (;;)
- {
- (void) Clock_read_itimer();
- if (future_time <= Clock_clicks)
- break;
- }
-}
-
-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(HPPA_INTERRUPT_EXTERNAL_INTERVAL_TIMER);
- }
- else if (args->command == rtems_build_name('N', 'E', 'W', ' '))
- {
- ReInstall_clock(args->buffer);
- }
-
-done:
- return RTEMS_SUCCESSFUL;
-}
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