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/*
* Copyright (c) 2015 Travis Geiselbrecht
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <reg.h>
#include <trace.h>
#include <err.h>
#include <lk/init.h>
#include <kernel/thread.h>
#include <platform.h>
#include <platform/timer.h>
#include <platform/interrupts.h>
#include <platform/debug.h>
#include <sys/types.h>
#include <target/microblaze-config.h>
#define LOCAL_TRACE 0
#define R_TCSR 0
#define R_TLR 1
#define R_TCR 2
#define R_MAX 4
#define TCSR_MDT (1<<0)
#define TCSR_UDT (1<<1)
#define TCSR_GENT (1<<2)
#define TCSR_CAPT (1<<3)
#define TCSR_ARHT (1<<4)
#define TCSR_LOAD (1<<5)
#define TCSR_ENIT (1<<6)
#define TCSR_ENT (1<<7)
#define TCSR_TINT (1<<8)
#define TCSR_PWMA (1<<9)
#define TCSR_ENALL (1<<10)
#define TIMER_REG(reg) (*REG32(TIMER_BASEADDR + (reg) * 4))
static platform_timer_callback timer_cb;
static void *timer_arg;
static uint32_t ticks = 0;
status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, lk_time_t interval)
{
LTRACEF("cb %p, arg %p, interval %u\n", callback, arg, interval);
uint32_t count = ((uint64_t)TIMER_RATE * interval / 1000);
LTRACEF("count 0x%x\n", count);
timer_cb = callback;
timer_arg = arg;
TIMER_REG(R_TCSR) = 0;
TIMER_REG(R_TLR) = count;
TIMER_REG(R_TCSR) = TCSR_ENIT | TCSR_UDT | TCSR_ARHT | TCSR_ENT;
return NO_ERROR;
}
lk_bigtime_t current_time_hires(void)
{
return (lk_bigtime_t)ticks * 10000;
}
lk_time_t current_time(void)
{
return (lk_time_t)ticks * 10;
}
enum handler_return timer_irq(void *arg)
{
LTRACE;
TIMER_REG(R_TCSR) |= TCSR_TINT;
ticks += 1;
enum handler_return ret = timer_cb(timer_arg, ticks * 10);
return ret;
}
static void timer_init(uint level)
{
LTRACE;
register_int_handler(TIMER_IRQ, timer_irq, NULL);
unmask_interrupt(TIMER_IRQ);
}
LK_INIT_HOOK(timer, timer_init, LK_INIT_LEVEL_PLATFORM_EARLY + 1);
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