86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/*
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* Copyright (c) 2008 Travis Geiselbrecht
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <sys/types.h>
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#include <err.h>
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#include <kernel/thread.h>
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#include <platform.h>
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#include <platform/interrupts.h>
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#include <platform/timer.h>
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#include <platform/armemu.h>
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#include "platform_p.h"
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static platform_timer_callback t_callback;
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status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, time_t interval)
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{
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enter_critical_section();
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t_callback = callback;
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*REG(PIT_CLEAR) = 1;
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*REG(PIT_INTERVAL) = interval;
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*REG(PIT_START_PERIODIC) = 1;
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unmask_interrupt(INT_PIT);
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exit_critical_section();
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return NO_ERROR;
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}
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bigtime_t current_time_hires(void)
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{
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bigtime_t time;
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*REG(SYSINFO_TIME_LATCH) = 1;
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time = *REG(SYSINFO_TIME_SECS) * 1000000ULL;
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time += *REG(SYSINFO_TIME_USECS);
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return time;
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}
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time_t current_time(void)
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{
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time_t time;
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*REG(SYSINFO_TIME_LATCH) = 1;
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time = *REG(SYSINFO_TIME_SECS) * 1000;
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time += *REG(SYSINFO_TIME_USECS) / 1000;
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return time;
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}
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static enum handler_return platform_tick(void *arg)
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{
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*REG(PIT_CLEAR_INT) = 1;
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if (t_callback) {
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return t_callback(arg, current_time());
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} else {
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return INT_NO_RESCHEDULE;
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}
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}
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void platform_init_timer(void)
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{
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register_int_handler(INT_PIT, &platform_tick, NULL);
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}
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