1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Modified from arch/mips/pnx833x/common/prom.c.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/io.h>
9*4882a593Smuzhiyun #include <linux/init.h>
10*4882a593Smuzhiyun #include <linux/memblock.h>
11*4882a593Smuzhiyun #include <linux/serial_reg.h>
12*4882a593Smuzhiyun #include <asm/fw/fw.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include <loongson1.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun unsigned long memsize;
17*4882a593Smuzhiyun
prom_init(void)18*4882a593Smuzhiyun void __init prom_init(void)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun void __iomem *uart_base;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun fw_init_cmdline();
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun memsize = fw_getenvl("memsize");
25*4882a593Smuzhiyun if(!memsize)
26*4882a593Smuzhiyun memsize = DEFAULT_MEMSIZE;
27*4882a593Smuzhiyun
28*4882a593Smuzhiyun if (strstr(arcs_cmdline, "console=ttyS3"))
29*4882a593Smuzhiyun uart_base = ioremap(LS1X_UART3_BASE, 0x0f);
30*4882a593Smuzhiyun else if (strstr(arcs_cmdline, "console=ttyS2"))
31*4882a593Smuzhiyun uart_base = ioremap(LS1X_UART2_BASE, 0x0f);
32*4882a593Smuzhiyun else if (strstr(arcs_cmdline, "console=ttyS1"))
33*4882a593Smuzhiyun uart_base = ioremap(LS1X_UART1_BASE, 0x0f);
34*4882a593Smuzhiyun else
35*4882a593Smuzhiyun uart_base = ioremap(LS1X_UART0_BASE, 0x0f);
36*4882a593Smuzhiyun setup_8250_early_printk_port((unsigned long)uart_base, 0, 0);
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
prom_free_prom_memory(void)39*4882a593Smuzhiyun void __init prom_free_prom_memory(void)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
plat_mem_setup(void)43*4882a593Smuzhiyun void __init plat_mem_setup(void)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun memblock_add(0x0, (memsize << 20));
46*4882a593Smuzhiyun }
47