acrn-hypervisor/hypervisor/debug/console.c

76 lines
1.4 KiB
C

/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <hypervisor.h>
#include "uart16550.h"
struct hv_timer console_timer;
#define CONSOLE_KICK_TIMER_TIMEOUT 40UL /* timeout is 40ms*/
void console_init(void)
{
uart16550_init();
}
void console_putc(const char *ch)
{
(void)uart16550_puts(ch, 1U);
}
size_t console_write(const char *s, size_t len)
{
return uart16550_puts(s, len);
}
char console_getc(void)
{
return uart16550_getc();
}
static void console_timer_callback(__unused void *data)
{
struct acrn_vuart *vu;
/* Kick HV-Shell and Uart-Console tasks */
vu = vuart_console_active();
if (vu != NULL) {
/* serial Console Rx operation */
vuart_console_rx_chars(vu);
/* serial Console Tx operation */
vuart_console_tx_chars(vu);
} else {
shell_kick();
}
}
void console_setup_timer(void)
{
uint64_t period_in_cycle, fire_tsc;
period_in_cycle = CYCLES_PER_MS * CONSOLE_KICK_TIMER_TIMEOUT;
fire_tsc = rdtsc() + period_in_cycle;
initialize_timer(&console_timer,
console_timer_callback, NULL,
fire_tsc, TICK_MODE_PERIODIC, period_in_cycle);
/* Start an periodic timer */
if (add_timer(&console_timer) != 0) {
pr_err("Failed to add console kick timer");
}
}
void suspend_console(void)
{
del_timer(&console_timer);
}
void resume_console(void)
{
console_setup_timer();
}