Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * PROM interface routines. | |
3 | */ | |
4 | #include <linux/types.h> | |
5 | #include <linux/init.h> | |
6 | #include <linux/string.h> | |
7 | #include <linux/ctype.h> | |
8 | #include <linux/kernel.h> | |
9 | #include <linux/mm.h> | |
10 | #include <linux/bootmem.h> | |
11 | #include <linux/ioport.h> | |
12 | #include <asm/bootinfo.h> | |
13 | #include <asm/lasat/lasat.h> | |
14 | #include <asm/cpu.h> | |
15 | ||
16 | #include "at93c.h" | |
17 | #include <asm/lasat/eeprom.h> | |
18 | #include "prom.h" | |
19 | ||
20 | #define RESET_VECTOR 0xbfc00000 | |
21 | #define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n)) | |
22 | #define PROM_DISPLAY_ADDR PROM_JUMP_TABLE_ENTRY(0) | |
23 | #define PROM_PUTC_ADDR PROM_JUMP_TABLE_ENTRY(1) | |
24 | #define PROM_MONITOR_ADDR PROM_JUMP_TABLE_ENTRY(2) | |
25 | ||
26 | static void null_prom_printf(const char * fmt, ...) | |
27 | { | |
28 | } | |
29 | ||
30 | static void null_prom_display(const char *string, int pos, int clear) | |
31 | { | |
32 | } | |
33 | ||
34 | static void null_prom_monitor(void) | |
35 | { | |
36 | } | |
37 | ||
38 | static void null_prom_putc(char c) | |
39 | { | |
40 | } | |
41 | ||
42 | /* these are functions provided by the bootloader */ | |
43 | static void (* prom_putc)(char c) = null_prom_putc; | |
44 | void (* prom_printf)(const char * fmt, ...) = null_prom_printf; | |
42a3b4f2 | 45 | void (* prom_display)(const char *string, int pos, int clear) = |
1da177e4 LT |
46 | null_prom_display; |
47 | void (* prom_monitor)(void) = null_prom_monitor; | |
48 | ||
49 | unsigned int lasat_ndelay_divider; | |
50 | ||
51 | #define PROM_PRINTFBUF_SIZE 256 | |
52 | static char prom_printfbuf[PROM_PRINTFBUF_SIZE]; | |
53 | ||
54 | static void real_prom_printf(const char * fmt, ...) | |
55 | { | |
56 | va_list ap; | |
57 | int len; | |
58 | char *c = prom_printfbuf; | |
59 | int i; | |
60 | ||
61 | va_start(ap, fmt); | |
62 | len = vsnprintf(prom_printfbuf, PROM_PRINTFBUF_SIZE, fmt, ap); | |
63 | va_end(ap); | |
64 | ||
65 | /* output overflowed the buffer */ | |
66 | if (len < 0 || len > PROM_PRINTFBUF_SIZE) | |
67 | len = PROM_PRINTFBUF_SIZE; | |
68 | ||
69 | for (i=0; i < len; i++) { | |
70 | if (*c == '\n') | |
71 | prom_putc('\r'); | |
72 | prom_putc(*c++); | |
73 | } | |
74 | } | |
75 | ||
76 | static void setup_prom_vectors(void) | |
77 | { | |
78 | u32 version = *(u32 *)(RESET_VECTOR + 0x90); | |
79 | ||
80 | if (version >= 307) { | |
81 | prom_display = (void *)PROM_DISPLAY_ADDR; | |
82 | prom_putc = (void *)PROM_PUTC_ADDR; | |
83 | prom_printf = real_prom_printf; | |
84 | prom_monitor = (void *)PROM_MONITOR_ADDR; | |
85 | } | |
86 | prom_printf("prom vectors set up\n"); | |
87 | } | |
88 | ||
89 | static struct at93c_defs at93c_defs[N_MACHTYPES] = { | |
90 | {(void *)AT93C_REG_100, (void *)AT93C_RDATA_REG_100, AT93C_RDATA_SHIFT_100, | |
91 | AT93C_WDATA_SHIFT_100, AT93C_CS_M_100, AT93C_CLK_M_100}, | |
92 | {(void *)AT93C_REG_200, (void *)AT93C_RDATA_REG_200, AT93C_RDATA_SHIFT_200, | |
93 | AT93C_WDATA_SHIFT_200, AT93C_CS_M_200, AT93C_CLK_M_200}, | |
94 | }; | |
95 | ||
96 | void __init prom_init(void) | |
97 | { | |
98 | int argc = fw_arg0; | |
99 | char **argv = (char **) fw_arg1; | |
100 | ||
101 | setup_prom_vectors(); | |
102 | ||
103 | if (current_cpu_data.cputype == CPU_R5000) { | |
104 | prom_printf("LASAT 200 board\n"); | |
105 | mips_machtype = MACH_LASAT_200; | |
106 | lasat_ndelay_divider = LASAT_200_DIVIDER; | |
107 | } else { | |
108 | prom_printf("LASAT 100 board\n"); | |
109 | mips_machtype = MACH_LASAT_100; | |
110 | lasat_ndelay_divider = LASAT_100_DIVIDER; | |
111 | } | |
112 | ||
113 | at93c = &at93c_defs[mips_machtype]; | |
114 | ||
115 | lasat_init_board_info(); /* Read info from EEPROM */ | |
116 | ||
117 | mips_machgroup = MACH_GROUP_LASAT; | |
118 | ||
119 | /* Get the command line */ | |
120 | if (argc > 0) { | |
121 | strncpy(arcs_cmdline, argv[0], CL_SIZE-1); | |
122 | arcs_cmdline[CL_SIZE-1] = '\0'; | |
123 | } | |
124 | ||
125 | /* Set the I/O base address */ | |
126 | set_io_port_base(KSEG1); | |
127 | ||
128 | /* Set memory regions */ | |
129 | ioport_resource.start = 0; | |
130 | ioport_resource.end = 0xffffffff; /* Wrong, fixme. */ | |
131 | ||
132 | add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM); | |
133 | } | |
134 | ||
135 | unsigned long __init prom_free_prom_memory(void) | |
136 | { | |
137 | return 0; | |
138 | } | |
139 | ||
140 | const char *get_system_type(void) | |
141 | { | |
142 | return lasat_board_info.li_bmstr; | |
143 | } |