d06fbd35c8
The port more or less fully works now, except for actual interrupt driven io and proper atomics. Also hit a floating point exception in the string benchmark.
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright (c) 2019 Travis Geiselbrecht
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*
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* Use of this source code is governed by a MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT
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*/
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#include <lk/debug.h>
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#include <lk/err.h>
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#include <lk/trace.h>
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#include <kernel/thread.h>
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#include <platform.h>
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#include <platform/timer.h>
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#include <arch/vax.h>
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static uint32_t ticks;
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static platform_timer_callback cb;
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static void *cb_arg;
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// stubbed out timer
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status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, lk_time_t interval) {
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// for the moment, assume the kernel is asking for 10ms
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DEBUG_ASSERT(interval == 10);
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cb = callback;
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cb_arg = arg;
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return NO_ERROR;
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}
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// fires once every 10ms
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void vax_interval_timer(void) {
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ticks++;
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enum handler_return ret = cb(cb_arg, current_time());
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if (ret == INT_RESCHEDULE) {
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thread_preempt();
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}
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}
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void platform_early_timer_init(void) {
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// we can only assume there is a single 10ms interval timer available,
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// but go ahead and configure it using the full register interface, since it
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// wont hurt.
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// load the next count register with -10000 usecs
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mtpr(-10000, PR_NICR);
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// start the timer and clear any old state
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// clear error, clear interrupt, enable interrupt, load count, run
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mtpr((1<<31) | (1<<7) | (1<<6) | (1<<4) | (1<<0), PR_ICCS);
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}
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void platform_timer_init(void) {
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}
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lk_time_t current_time() {
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return ticks * 10;
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}
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lk_bigtime_t current_time_hires() {
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return ticks * 10000;
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}
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