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simulator: Rework dummy simulator code to user timer_irq / serial_irq

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Change the simulator to use the generic timer_irq.c and serial_irq.c
code for (dummy) timer and io handling.  This is just to make the code
a better example for other developers (most micro-controllers will use
the timer_irq.c and serial_irq.c code).

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-07-11 13:46:07 -04:00
parent 00ea4428a3
commit 5294b3cd2d
6 changed files with 165 additions and 109 deletions
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109
src/simulator/main.c
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@ -1,122 +1,15 @@
// Main starting point for host simulator.
//
// Copyright (C) 2016 Kevin O'Connor <kevin@koconnor.net>
// Copyright (C) 2016-2018 Kevin O'Connor <kevin@koconnor.net>
//
// This file may be distributed under the terms of the GNU GPLv3 license.
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include "board/misc.h" // timer_from_us
#include "board/irq.h" // irq_disable
#include "sched.h" // sched_main
/****************************************************************
* Interrupts
****************************************************************/
irqstatus_t Interrupt_off;
void
irq_disable(void)
{
Interrupt_off = 1;
barrier();
}
void
irq_enable(void)
{
barrier();
Interrupt_off = 0;
}
irqstatus_t
irq_save(void)
{
irqstatus_t flag = Interrupt_off;
irq_disable();
return flag;
}
void
irq_restore(irqstatus_t flag)
{
barrier();
Interrupt_off = flag;
}
void
irq_wait(void)
{
}
void
irq_poll(void)
{
}
/****************************************************************
* Timers
****************************************************************/
uint32_t
timer_from_us(uint32_t us)
{
return 0; // XXX
}
uint8_t
timer_is_before(uint32_t time1, uint32_t time2)
{
return (int32_t)(time1 - time2) < 0;
}
uint32_t
timer_read_time(void)
{
return 0; // XXX
}
void
timer_kick(void)
{
}
/****************************************************************
* Turn stdin/stdout into serial console
****************************************************************/
// Encode and transmit a "response" message
void
console_sendf(const struct command_encoder *ce, va_list args)
{
}
/****************************************************************
* Startup
****************************************************************/
// Periodically sleep so we don't consume all CPU
void
simu_pause(void)
{
// XXX - should check that no timers are present.
usleep(1);
}
DECL_TASK(simu_pause);
// Main entry point for simulator.
int
main(void)
{
// Make stdin non-blocking
fcntl(STDIN_FILENO, F_SETFL, fcntl(STDIN_FILENO, F_GETFL, 0) | O_NONBLOCK);
sched_main();
return 0;
}