76 lines
1.4 KiB
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();
|
|
}
|