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1da177e4 LT |
1 | /* |
2 | * Copyright 2002 Momentum Computer Inc. | |
3 | * Author: Matthew Dharm <mdharm@momenco.com> | |
4 | * | |
5 | * Louis Hamilton, Red Hat, Inc. | |
6 | * hamilton@redhat.com [MIPS64 modifications] | |
7 | * | |
8 | * Based on Ocelot Linux port, which is | |
9 | * Copyright 2001 MontaVista Software Inc. | |
10 | * Author: jsun@mvista.com or jsun@junsun.net | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License as published by the | |
14 | * Free Software Foundation; either version 2 of the License, or (at your | |
15 | * option) any later version. | |
16 | */ | |
17 | #include <linux/config.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/mm.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/bootmem.h> | |
22 | ||
23 | #include <asm/addrspace.h> | |
24 | #include <asm/bootinfo.h> | |
25 | #include <asm/mv64340.h> | |
26 | #include <asm/pmon.h> | |
27 | ||
28 | #include "ocelot_c_fpga.h" | |
29 | ||
30 | struct callvectors* debug_vectors; | |
31 | ||
32 | extern unsigned long marvell_base; | |
33 | extern unsigned long cpu_clock; | |
34 | ||
35 | #ifdef CONFIG_MV643XX_ETH | |
36 | extern unsigned char prom_mac_addr_base[6]; | |
37 | #endif | |
38 | ||
39 | const char *get_system_type(void) | |
40 | { | |
41 | #ifdef CONFIG_CPU_SR71000 | |
42 | return "Momentum Ocelot-CS"; | |
43 | #else | |
44 | return "Momentum Ocelot-C"; | |
45 | #endif | |
46 | } | |
47 | ||
48 | #ifdef CONFIG_MV643XX_ETH | |
49 | static void burn_clocks(void) | |
50 | { | |
51 | int i; | |
52 | ||
53 | /* this loop should burn at least 1us -- this should be plenty */ | |
54 | for (i = 0; i < 0x10000; i++) | |
55 | ; | |
56 | } | |
57 | ||
58 | static u8 exchange_bit(u8 val, u8 cs) | |
59 | { | |
60 | /* place the data */ | |
61 | OCELOT_FPGA_WRITE((val << 2) | cs, EEPROM_MODE); | |
62 | burn_clocks(); | |
63 | ||
64 | /* turn the clock on */ | |
65 | OCELOT_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE); | |
66 | burn_clocks(); | |
67 | ||
68 | /* turn the clock off and read-strobe */ | |
69 | OCELOT_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE); | |
42a3b4f2 | 70 | |
1da177e4 LT |
71 | /* return the data */ |
72 | return ((OCELOT_FPGA_READ(EEPROM_MODE) >> 3) & 0x1); | |
73 | } | |
74 | ||
75 | void get_mac(char dest[6]) | |
76 | { | |
77 | u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; | |
78 | int i,j; | |
79 | ||
80 | for (i = 0; i < 12; i++) | |
81 | exchange_bit(read_opcode[i], 1); | |
82 | ||
83 | for (j = 0; j < 6; j++) { | |
84 | dest[j] = 0; | |
85 | for (i = 0; i < 8; i++) { | |
86 | dest[j] <<= 1; | |
87 | dest[j] |= exchange_bit(0, 1); | |
88 | } | |
89 | } | |
90 | ||
91 | /* turn off CS */ | |
92 | exchange_bit(0,0); | |
93 | } | |
94 | #endif | |
95 | ||
96 | ||
875d43e7 | 97 | #ifdef CONFIG_64BIT |
1da177e4 LT |
98 | |
99 | unsigned long signext(unsigned long addr) | |
100 | { | |
101 | addr &= 0xffffffff; | |
102 | return (unsigned long)((int)addr); | |
103 | } | |
104 | ||
105 | void *get_arg(unsigned long args, int arc) | |
106 | { | |
107 | unsigned long ul; | |
108 | unsigned char *puc, uc; | |
109 | ||
110 | args += (arc * 4); | |
111 | ul = (unsigned long)signext(args); | |
112 | puc = (unsigned char *)ul; | |
113 | if (puc == 0) | |
114 | return (void *)0; | |
115 | ||
116 | #ifdef CONFIG_CPU_LITTLE_ENDIAN | |
117 | uc = *puc++; | |
118 | ul = (unsigned long)uc; | |
119 | uc = *puc++; | |
120 | ul |= (((unsigned long)uc) << 8); | |
121 | uc = *puc++; | |
122 | ul |= (((unsigned long)uc) << 16); | |
123 | uc = *puc++; | |
124 | ul |= (((unsigned long)uc) << 24); | |
125 | #else /* CONFIG_CPU_LITTLE_ENDIAN */ | |
126 | uc = *puc++; | |
127 | ul = ((unsigned long)uc) << 24; | |
128 | uc = *puc++; | |
129 | ul |= (((unsigned long)uc) << 16); | |
130 | uc = *puc++; | |
131 | ul |= (((unsigned long)uc) << 8); | |
132 | uc = *puc++; | |
133 | ul |= ((unsigned long)uc); | |
134 | #endif /* CONFIG_CPU_LITTLE_ENDIAN */ | |
135 | ul = signext(ul); | |
136 | return (void *)ul; | |
137 | } | |
138 | ||
139 | char *arg64(unsigned long addrin, int arg_index) | |
140 | { | |
141 | unsigned long args; | |
142 | char *p; | |
143 | args = signext(addrin); | |
144 | p = (char *)get_arg(args, arg_index); | |
145 | return p; | |
146 | } | |
875d43e7 | 147 | #endif /* CONFIG_64BIT */ |
1da177e4 LT |
148 | |
149 | ||
150 | void __init prom_init(void) | |
151 | { | |
152 | int argc = fw_arg0; | |
153 | char **arg = (char **) fw_arg1; | |
154 | char **env = (char **) fw_arg2; | |
155 | struct callvectors *cv = (struct callvectors *) fw_arg3; | |
156 | int i; | |
157 | ||
875d43e7 | 158 | #ifdef CONFIG_64BIT |
1da177e4 LT |
159 | char *ptr; |
160 | ||
161 | printk("prom_init - MIPS64\n"); | |
162 | /* save the PROM vectors for debugging use */ | |
163 | debug_vectors = (struct callvectors *)signext((unsigned long)cv); | |
164 | ||
165 | /* arg[0] is "g", the rest is boot parameters */ | |
166 | arcs_cmdline[0] = '\0'; | |
167 | ||
168 | for (i = 1; i < argc; i++) { | |
169 | ptr = (char *)arg64((unsigned long)arg, i); | |
170 | if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >= | |
171 | sizeof(arcs_cmdline)) | |
172 | break; | |
173 | strcat(arcs_cmdline, ptr); | |
174 | strcat(arcs_cmdline, " "); | |
175 | } | |
176 | i = 0; | |
177 | while (1) { | |
178 | ptr = (char *)arg64((unsigned long)env, i); | |
179 | if (! ptr) | |
180 | break; | |
181 | ||
182 | if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) { | |
183 | marvell_base = simple_strtol(ptr + strlen("gtbase="), | |
184 | NULL, 16); | |
185 | ||
186 | if ((marvell_base & 0xffffffff00000000) == 0) | |
187 | marvell_base |= 0xffffffff00000000; | |
188 | ||
189 | printk("marvell_base set to 0x%016lx\n", marvell_base); | |
190 | } | |
191 | if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) { | |
192 | cpu_clock = simple_strtol(ptr + strlen("cpuclock="), | |
193 | NULL, 10); | |
194 | printk("cpu_clock set to %d\n", cpu_clock); | |
195 | } | |
196 | i++; | |
197 | } | |
198 | printk("arcs_cmdline: %s\n", arcs_cmdline); | |
199 | ||
875d43e7 | 200 | #else /* CONFIG_64BIT */ |
1da177e4 LT |
201 | /* save the PROM vectors for debugging use */ |
202 | debug_vectors = cv; | |
203 | ||
204 | /* arg[0] is "g", the rest is boot parameters */ | |
205 | arcs_cmdline[0] = '\0'; | |
206 | for (i = 1; i < argc; i++) { | |
207 | if (strlen(arcs_cmdline) + strlen(arg[i] + 1) | |
208 | >= sizeof(arcs_cmdline)) | |
209 | break; | |
210 | strcat(arcs_cmdline, arg[i]); | |
211 | strcat(arcs_cmdline, " "); | |
212 | } | |
213 | ||
214 | while (*env) { | |
215 | if (strncmp("gtbase", *env, strlen("gtbase")) == 0) { | |
216 | marvell_base = simple_strtol(*env + strlen("gtbase="), | |
217 | NULL, 16); | |
218 | } | |
219 | if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) { | |
220 | cpu_clock = simple_strtol(*env + strlen("cpuclock="), | |
221 | NULL, 10); | |
222 | } | |
223 | env++; | |
224 | } | |
875d43e7 | 225 | #endif /* CONFIG_64BIT */ |
1da177e4 LT |
226 | |
227 | mips_machgroup = MACH_GROUP_MOMENCO; | |
228 | mips_machtype = MACH_MOMENCO_OCELOT_C; | |
229 | ||
230 | #ifdef CONFIG_MV643XX_ETH | |
231 | /* get the base MAC address for on-board ethernet ports */ | |
232 | get_mac(prom_mac_addr_base); | |
233 | #endif | |
234 | ||
875d43e7 | 235 | #ifndef CONFIG_64BIT |
1da177e4 LT |
236 | debug_vectors->printf("Booting Linux kernel...\n"); |
237 | #endif | |
238 | } | |
239 | ||
240 | unsigned long __init prom_free_prom_memory(void) | |
241 | { | |
242 | return 0; | |
243 | } |