aboutsummaryrefslogtreecommitdiff
path: root/src/mainboard/emulation/qemu-riscv/uart.c
blob: 40192c91fa3eef64f81996800d0489c0d631efe0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
/*
 * This file is part of the coreboot project.
 *
 * Copyright 2014 Google Inc.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <types.h>
#include <console/uart.h>
#include <arch/io.h>
#include <boot/coreboot_tables.h>
#include "frontend.h"

static uint8_t *buf = (void *)0x3f8;
uintptr_t uart_platform_base(int idx)
{
	return (uintptr_t) buf;
}

void uart_init(int idx)
{
}

unsigned char uart_rx_byte(int idx)
{
	return *buf;
}

void uart_tx_byte(int idx, unsigned char data)
{
	*buf = data;
}

void uart_tx_flush(int idx)
{
}

#ifndef __PRE_RAM__
void uart_fill_lb(void *data)
{
	struct lb_serial serial;
	serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
	serial.baseaddr = 0x3f8;
	serial.baud = 115200;
	lb_add_serial(&serial, data);
        lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);
}
#endif