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12#include <linux/serial_reg.h>
13#include <asm/bootinfo.h>
14
15#include <loongson1.h>
16#include <prom.h>
17
18int prom_argc;
19char **prom_argv, **prom_envp;
20unsigned long memsize, highmemsize;
21
22char *prom_getenv(char *envname)
23{
24 char **env = prom_envp;
25 int i;
26
27 i = strlen(envname);
28
29 while (*env) {
30 if (strncmp(envname, *env, i) == 0 && *(*env + i) == '=')
31 return *env + i + 1;
32 env++;
33 }
34
35 return 0;
36}
37
38static inline unsigned long env_or_default(char *env, unsigned long dfl)
39{
40 char *str = prom_getenv(env);
41 return str ? simple_strtol(str, 0, 0) : dfl;
42}
43
44void __init prom_init_cmdline(void)
45{
46 char *c = &(arcs_cmdline[0]);
47 int i;
48
49 for (i = 1; i < prom_argc; i++) {
50 strcpy(c, prom_argv[i]);
51 c += strlen(prom_argv[i]);
52 if (i < prom_argc - 1)
53 *c++ = ' ';
54 }
55 *c = 0;
56}
57
58void __init prom_init(void)
59{
60 void __iomem *uart_base;
61 prom_argc = fw_arg0;
62 prom_argv = (char **)fw_arg1;
63 prom_envp = (char **)fw_arg2;
64
65 prom_init_cmdline();
66
67 memsize = env_or_default("memsize", DEFAULT_MEMSIZE);
68 highmemsize = env_or_default("highmemsize", 0x0);
69
70 if (strstr(arcs_cmdline, "console=ttyS3"))
71 uart_base = ioremap_nocache(LS1X_UART3_BASE, 0x0f);
72 else if (strstr(arcs_cmdline, "console=ttyS2"))
73 uart_base = ioremap_nocache(LS1X_UART2_BASE, 0x0f);
74 else if (strstr(arcs_cmdline, "console=ttyS1"))
75 uart_base = ioremap_nocache(LS1X_UART1_BASE, 0x0f);
76 else
77 uart_base = ioremap_nocache(LS1X_UART0_BASE, 0x0f);
78 setup_8250_early_printk_port((unsigned long)uart_base, 0, 0);
79}
80
81void __init prom_free_prom_memory(void)
82{
83}
84