acrn-hypervisor/hypervisor/debug/dbg_cmd.c

63 lines
1.3 KiB
C

/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <types.h>
#include <rtl.h>
#include <pci.h>
#include <uart16550.h>
#include <dbg_cmd.h>
#define MAX_PORT 0x10000 /* port 0 - 64K */
#define DEFAULT_UART_PORT 0x3F8
#define MAX_CMD_LEN 64
static struct uart_cmd {
const char *const str;
int type;
} cmd_list[] = {
{ "uart=port@", PIO }, /* uart=port@0x3F8 */
{ "uart=bdf@", PCI }, /* uart=bdf@0xc1 */
{ "uart=mmio@", MMIO }, /* uart=mmio@0xfe040000 */
{ "uart=disabled", INVALID }
};
bool handle_dbg_cmd(const char *cmd, int32_t len)
{
uint32_t i;
uint64_t data;
for (i = 0; i < ARRAY_SIZE(cmd_list); i++) {
int32_t tmp = strnlen_s(cmd_list[i].str, MAX_CMD_LEN);
int type = cmd_list[i].type;
/* cmd prefix should be same with one in cmd_list */
if (len < tmp)
continue;
if (strncmp(cmd_list[i].str, cmd, tmp) != 0)
continue;
if (type == INVALID) {
/* set uart disabled*/
uart16550_set_property(false, type, 0UL);
} else if (type == PIO) {
data = strtoul_hex(cmd + tmp);
if (data > MAX_PORT) {
data = DEFAULT_UART_PORT;
}
uart16550_set_property(true, type, data);
} else {
data = strtoul_hex(cmd + tmp);
uart16550_set_property(true, type, data);
}
}
return (i < ARRAY_SIZE(cmd_list));
}