1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
4 *
5 * Modified from arch/mips/pnx833x/common/prom.c.
6 */
7
8#include <linux/io.h>
9#include <linux/init.h>
10#include <linux/memblock.h>
11#include <linux/serial_reg.h>
12#include <asm/fw/fw.h>
13
14#include <loongson1.h>
15
16unsigned long memsize;
17
18void __init prom_init(void)
19{
20	void __iomem *uart_base;
21
22	fw_init_cmdline();
23
24	memsize = fw_getenvl("memsize");
25	if(!memsize)
26		memsize = DEFAULT_MEMSIZE;
27
28	if (strstr(arcs_cmdline, "console=ttyS3"))
29		uart_base = ioremap(LS1X_UART3_BASE, 0x0f);
30	else if (strstr(arcs_cmdline, "console=ttyS2"))
31		uart_base = ioremap(LS1X_UART2_BASE, 0x0f);
32	else if (strstr(arcs_cmdline, "console=ttyS1"))
33		uart_base = ioremap(LS1X_UART1_BASE, 0x0f);
34	else
35		uart_base = ioremap(LS1X_UART0_BASE, 0x0f);
36	setup_8250_early_printk_port((unsigned long)uart_base, 0, 0);
37}
38
39void __init plat_mem_setup(void)
40{
41	memblock_add(0x0, (memsize << 20));
42}
43