Commit | Line | Data |
---|---|---|
1f21d2bd BM |
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_display(const char *string, int pos, int clear) | |
27 | { | |
28 | } | |
29 | ||
30 | static void null_prom_monitor(void) | |
31 | { | |
32 | } | |
33 | ||
34 | static void null_prom_putc(char c) | |
35 | { | |
36 | } | |
37 | ||
38 | /* these are functions provided by the bootloader */ | |
39 | static void (*__prom_putc)(char c) = null_prom_putc; | |
40 | ||
41 | void prom_putchar(char c) | |
42 | { | |
43 | __prom_putc(c); | |
44 | } | |
45 | ||
46 | void (*prom_display)(const char *string, int pos, int clear) = | |
47 | null_prom_display; | |
48 | void (*prom_monitor)(void) = null_prom_monitor; | |
49 | ||
50 | unsigned int lasat_ndelay_divider; | |
51 | ||
52 | static void setup_prom_vectors(void) | |
53 | { | |
54 | u32 version = *(u32 *)(RESET_VECTOR + 0x90); | |
55 | ||
56 | if (version >= 307) { | |
57 | prom_display = (void *)PROM_DISPLAY_ADDR; | |
58 | __prom_putc = (void *)PROM_PUTC_ADDR; | |
59 | prom_monitor = (void *)PROM_MONITOR_ADDR; | |
60 | } | |
61 | printk(KERN_DEBUG "prom vectors set up\n"); | |
62 | } | |
63 | ||
64 | static struct at93c_defs at93c_defs[N_MACHTYPES] = { | |
65 | { | |
66 | .reg = (void *)AT93C_REG_100, | |
67 | .rdata_reg = (void *)AT93C_RDATA_REG_100, | |
68 | .rdata_shift = AT93C_RDATA_SHIFT_100, | |
69 | .wdata_shift = AT93C_WDATA_SHIFT_100, | |
70 | .cs = AT93C_CS_M_100, | |
71 | .clk = AT93C_CLK_M_100 | |
72 | }, { | |
73 | .reg = (void *)AT93C_REG_200, | |
74 | .rdata_reg = (void *)AT93C_RDATA_REG_200, | |
75 | .rdata_shift = AT93C_RDATA_SHIFT_200, | |
76 | .wdata_shift = AT93C_WDATA_SHIFT_200, | |
77 | .cs = AT93C_CS_M_200, | |
78 | .clk = AT93C_CLK_M_200 | |
79 | }, | |
80 | }; | |
81 | ||
82 | void __init prom_init(void) | |
83 | { | |
84 | int argc = fw_arg0; | |
85 | char **argv = (char **) fw_arg1; | |
86 | ||
87 | setup_prom_vectors(); | |
88 | ||
b27418aa | 89 | if (IS_LASAT_200()) { |
1f21d2bd | 90 | printk(KERN_INFO "LASAT 200 board\n"); |
1f21d2bd | 91 | lasat_ndelay_divider = LASAT_200_DIVIDER; |
b27418aa | 92 | at93c = &at93c_defs[1]; |
1f21d2bd BM |
93 | } else { |
94 | printk(KERN_INFO "LASAT 100 board\n"); | |
1f21d2bd | 95 | lasat_ndelay_divider = LASAT_100_DIVIDER; |
b27418aa | 96 | at93c = &at93c_defs[0]; |
1f21d2bd BM |
97 | } |
98 | ||
1f21d2bd BM |
99 | lasat_init_board_info(); /* Read info from EEPROM */ |
100 | ||
1f21d2bd BM |
101 | /* Get the command line */ |
102 | if (argc > 0) { | |
103 | strncpy(arcs_cmdline, argv[0], CL_SIZE-1); | |
104 | arcs_cmdline[CL_SIZE-1] = '\0'; | |
105 | } | |
106 | ||
107 | /* Set the I/O base address */ | |
108 | set_io_port_base(KSEG1); | |
109 | ||
110 | /* Set memory regions */ | |
111 | ioport_resource.start = 0; | |
112 | ioport_resource.end = 0xffffffff; /* Wrong, fixme. */ | |
113 | ||
114 | add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM); | |
115 | } | |
116 | ||
117 | void __init prom_free_prom_memory(void) | |
118 | { | |
119 | } | |
120 | ||
121 | const char *get_system_type(void) | |
122 | { | |
123 | return lasat_board_info.li_bmstr; | |
124 | } |