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4a0312fc TB |
1 | /* |
2 | * Big Endian PROM code for SNI RM machines | |
3 | * | |
4 | * This file is subject to the terms and conditions of the GNU General Public | |
5 | * License. See the file "COPYING" in the main directory of this archive | |
6 | * for more details. | |
7 | * | |
8 | * Copyright (C) 2005-2006 Florian Lohoff (flo@rfc822.org) | |
9 | * Copyright (C) 2005-2006 Thomas Bogendoerfer (tsbogend@alpha.franken.de) | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/string.h> | |
15 | ||
16 | #include <asm/addrspace.h> | |
17 | #include <asm/sni.h> | |
18 | #include <asm/mipsprom.h> | |
19 | #include <asm/bootinfo.h> | |
20 | ||
21 | /* special SNI prom calls */ | |
22 | /* | |
23 | * This does not exist in all proms - SINIX compares | |
24 | * the prom env variable "version" against "2.0008" | |
25 | * or greater. If lesser it tries to probe interesting | |
26 | * registers | |
27 | */ | |
28 | #define PROM_GET_MEMCONF 58 | |
29 | ||
30 | #define PROM_VEC (u64 *)CKSEG1ADDR(0x1fc00000) | |
31 | #define PROM_ENTRY(x) (PROM_VEC + (x)) | |
32 | ||
33 | ||
34 | #undef DEBUG | |
35 | #ifdef DEBUG | |
36 | #define DBG_PRINTF(x...) prom_printf(x) | |
37 | #else | |
38 | #define DBG_PRINTF(x...) | |
39 | #endif | |
40 | ||
41 | static int *(*__prom_putchar)(int) = (int *(*)(int))PROM_ENTRY(PROM_PUTCHAR); | |
42 | static char *(*__prom_getenv)(char *) = (char *(*)(char *))PROM_ENTRY(PROM_GETENV); | |
43 | static void (*__prom_get_memconf)(void *) = (void (*)(void *))PROM_ENTRY(PROM_GET_MEMCONF); | |
44 | ||
45 | char *prom_getenv (char *s) | |
46 | { | |
47 | return __prom_getenv(s); | |
48 | } | |
49 | ||
50 | void prom_printf(char *fmt, ...) | |
51 | { | |
52 | va_list args; | |
53 | char ppbuf[1024]; | |
54 | char *bptr; | |
55 | ||
56 | va_start(args, fmt); | |
57 | vsprintf(ppbuf, fmt, args); | |
58 | ||
59 | bptr = ppbuf; | |
60 | ||
61 | while (*bptr != 0) { | |
62 | if (*bptr == '\n') | |
63 | __prom_putchar('\r'); | |
64 | ||
65 | __prom_putchar(*bptr++); | |
66 | } | |
67 | va_end(args); | |
68 | } | |
69 | ||
70 | unsigned long prom_free_prom_memory(void) | |
71 | { | |
72 | return 0; | |
73 | } | |
74 | ||
75 | /* | |
76 | * /proc/cpuinfo system type | |
77 | * | |
78 | */ | |
79 | static const char *systype = "Unknown"; | |
80 | const char *get_system_type(void) | |
81 | { | |
82 | return systype; | |
83 | } | |
84 | ||
85 | #define SNI_IDPROM_BASE 0xbff00000 | |
86 | #define SNI_IDPROM_MEMSIZE (SNI_IDPROM_BASE+0x28) /* Memsize in 16MB quantities */ | |
87 | #define SNI_IDPROM_BRDTYPE (SNI_IDPROM_BASE+0x29) /* Board Type */ | |
88 | #define SNI_IDPROM_CPUTYPE (SNI_IDPROM_BASE+0x30) /* CPU Type */ | |
89 | ||
90 | #define SNI_IDPROM_SIZE 0x1000 | |
91 | ||
92 | #ifdef DEBUG | |
93 | static void sni_idprom_dump(void) | |
94 | { | |
95 | int i; | |
96 | ||
97 | prom_printf("SNI IDProm dump (first 128byte):\n"); | |
98 | for(i=0;i<128;i++) { | |
99 | if (i%16 == 0) | |
100 | prom_printf("%04x ", i); | |
101 | ||
102 | prom_printf("%02x ", *(unsigned char *) (SNI_IDPROM_BASE+i)); | |
103 | ||
104 | if (i%16 == 15) | |
105 | prom_printf("\n"); | |
106 | } | |
107 | } | |
108 | #endif | |
109 | ||
110 | static void sni_mem_init(void ) | |
111 | { | |
112 | int i, memsize; | |
113 | struct membank { | |
114 | u32 size; | |
115 | u32 base; | |
116 | u32 size2; | |
117 | u32 pad1; | |
118 | u32 pad2; | |
119 | } memconf[8]; | |
120 | ||
121 | /* MemSIZE from prom in 16MByte chunks */ | |
122 | memsize=*((unsigned char *) SNI_IDPROM_MEMSIZE) * 16; | |
123 | ||
124 | DBG_PRINTF("IDProm memsize: %lu MByte\n", memsize); | |
125 | ||
126 | /* get memory bank layout from prom */ | |
127 | __prom_get_memconf(&memconf); | |
128 | ||
129 | DBG_PRINTF("prom_get_mem_conf memory configuration:\n"); | |
130 | for(i=0;i<8 && memconf[i].size;i++) { | |
131 | prom_printf("Bank%d: %08x @ %08x\n", i, | |
132 | memconf[i].size, memconf[i].base); | |
133 | add_memory_region(memconf[i].base, memconf[i].size, BOOT_MEM_RAM); | |
134 | } | |
135 | } | |
136 | ||
137 | void __init prom_init(void) | |
138 | { | |
139 | int argc = fw_arg0; | |
140 | char **argv = (void *)fw_arg1; | |
141 | unsigned int sni_brd_type = *(unsigned char *) SNI_IDPROM_BRDTYPE; | |
142 | int i; | |
143 | ||
144 | DBG_PRINTF("Found SNI brdtype %02x\n", sni_brd_type); | |
145 | ||
146 | #ifdef DEBUG | |
147 | sni_idprom_dump(); | |
148 | #endif | |
149 | sni_mem_init(); | |
150 | ||
151 | /* copy prom cmdline parameters to kernel cmdline */ | |
152 | for (i = 1; i < argc; i++) { | |
153 | strcat(arcs_cmdline, argv[i]); | |
154 | if (i < (argc - 1)) | |
155 | strcat(arcs_cmdline, " "); | |
156 | } | |
157 | } | |
158 |