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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 | * Added changes for SMP - Manish Lachwani (lachwani@pmc-sierra.com) | |
18 | */ | |
19 | #include <linux/config.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/sched.h> | |
23 | #include <linux/bootmem.h> | |
24 | ||
25 | #include <asm/addrspace.h> | |
26 | #include <asm/bootinfo.h> | |
27 | #include <asm/mv64340.h> | |
28 | #include <asm/pmon.h> | |
29 | ||
30 | #include "jaguar_atx_fpga.h" | |
31 | ||
32 | extern void ja_setup_console(void); | |
33 | ||
34 | struct callvectors *debug_vectors; | |
35 | ||
36 | extern unsigned long cpu_clock; | |
37 | ||
38 | const char *get_system_type(void) | |
39 | { | |
40 | return "Momentum Jaguar-ATX"; | |
41 | } | |
42 | ||
43 | #ifdef CONFIG_MV643XX_ETH | |
44 | extern unsigned char prom_mac_addr_base[6]; | |
45 | ||
46 | static void burn_clocks(void) | |
47 | { | |
48 | int i; | |
49 | ||
50 | /* this loop should burn at least 1us -- this should be plenty */ | |
51 | for (i = 0; i < 0x10000; i++) | |
52 | ; | |
53 | } | |
54 | ||
55 | static u8 exchange_bit(u8 val, u8 cs) | |
56 | { | |
57 | /* place the data */ | |
58 | JAGUAR_FPGA_WRITE((val << 2) | cs, EEPROM_MODE); | |
59 | burn_clocks(); | |
60 | ||
61 | /* turn the clock on */ | |
62 | JAGUAR_FPGA_WRITE((val << 2) | cs | 0x2, EEPROM_MODE); | |
63 | burn_clocks(); | |
64 | ||
65 | /* turn the clock off and read-strobe */ | |
66 | JAGUAR_FPGA_WRITE((val << 2) | cs | 0x10, EEPROM_MODE); | |
42a3b4f2 | 67 | |
1da177e4 LT |
68 | /* return the data */ |
69 | return ((JAGUAR_FPGA_READ(EEPROM_MODE) >> 3) & 0x1); | |
70 | } | |
71 | ||
72 | void get_mac(char dest[6]) | |
73 | { | |
74 | u8 read_opcode[12] = {1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; | |
75 | int i,j; | |
76 | ||
77 | for (i = 0; i < 12; i++) | |
78 | exchange_bit(read_opcode[i], 1); | |
79 | ||
80 | for (j = 0; j < 6; j++) { | |
81 | dest[j] = 0; | |
82 | for (i = 0; i < 8; i++) { | |
83 | dest[j] <<= 1; | |
84 | dest[j] |= exchange_bit(0, 1); | |
85 | } | |
86 | } | |
87 | ||
88 | /* turn off CS */ | |
89 | exchange_bit(0,0); | |
90 | } | |
91 | #endif | |
92 | ||
875d43e7 | 93 | #ifdef CONFIG_64BIT |
1da177e4 LT |
94 | |
95 | unsigned long signext(unsigned long addr) | |
96 | { | |
97 | addr &= 0xffffffff; | |
98 | return (unsigned long)((int)addr); | |
99 | } | |
100 | ||
101 | void *get_arg(unsigned long args, int arc) | |
102 | { | |
103 | unsigned long ul; | |
104 | unsigned char *puc, uc; | |
105 | ||
106 | args += (arc * 4); | |
107 | ul = (unsigned long)signext(args); | |
108 | puc = (unsigned char *)ul; | |
109 | if (puc == 0) | |
110 | return (void *)0; | |
111 | ||
112 | #ifdef CONFIG_CPU_LITTLE_ENDIAN | |
113 | uc = *puc++; | |
114 | l = (unsigned long)uc; | |
115 | uc = *puc++; | |
116 | ul |= (((unsigned long)uc) << 8); | |
117 | uc = *puc++; | |
118 | ul |= (((unsigned long)uc) << 16); | |
119 | uc = *puc++; | |
120 | ul |= (((unsigned long)uc) << 24); | |
121 | #else | |
122 | uc = *puc++; | |
123 | ul = ((unsigned long)uc) << 24; | |
124 | uc = *puc++; | |
125 | ul |= (((unsigned long)uc) << 16); | |
126 | uc = *puc++; | |
127 | ul |= (((unsigned long)uc) << 8); | |
128 | uc = *puc++; | |
129 | ul |= ((unsigned long)uc); | |
130 | #endif | |
131 | ul = signext(ul); | |
132 | ||
133 | return (void *)ul; | |
134 | } | |
135 | ||
136 | char *arg64(unsigned long addrin, int arg_index) | |
137 | { | |
138 | unsigned long args; | |
139 | char *p; | |
140 | ||
141 | args = signext(addrin); | |
142 | p = (char *)get_arg(args, arg_index); | |
143 | ||
144 | return p; | |
145 | } | |
875d43e7 | 146 | #endif /* CONFIG_64BIT */ |
1da177e4 LT |
147 | |
148 | /* PMON passes arguments in C main() style */ | |
149 | void __init prom_init(void) | |
150 | { | |
151 | int argc = fw_arg0; | |
152 | char **arg = (char **) fw_arg1; | |
153 | char **env = (char **) fw_arg2; | |
154 | struct callvectors *cv = (struct callvectors *) fw_arg3; | |
155 | int i; | |
156 | ||
157 | #ifdef CONFIG_SERIAL_8250_CONSOLE | |
158 | // ja_setup_console(); /* The very first thing. */ | |
159 | #endif | |
160 | ||
875d43e7 | 161 | #ifdef CONFIG_64BIT |
1da177e4 LT |
162 | char *ptr; |
163 | ||
164 | printk("Mips64 Jaguar-ATX\n"); | |
165 | /* save the PROM vectors for debugging use */ | |
166 | debug_vectors = (struct callvectors *)signext((unsigned long)cv); | |
167 | ||
168 | /* arg[0] is "g", the rest is boot parameters */ | |
169 | arcs_cmdline[0] = '\0'; | |
170 | ||
171 | for (i = 1; i < argc; i++) { | |
172 | ptr = (char *)arg64((unsigned long)arg, i); | |
173 | if ((strlen(arcs_cmdline) + strlen(ptr) + 1) >= | |
174 | sizeof(arcs_cmdline)) | |
175 | break; | |
176 | strcat(arcs_cmdline, ptr); | |
177 | strcat(arcs_cmdline, " "); | |
178 | } | |
179 | ||
180 | i = 0; | |
181 | while (1) { | |
182 | ptr = (char *)arg64((unsigned long)env, i); | |
183 | if (! ptr) | |
184 | break; | |
185 | ||
186 | if (strncmp("gtbase", ptr, strlen("gtbase")) == 0) { | |
187 | marvell_base = simple_strtol(ptr + strlen("gtbase="), | |
188 | NULL, 16); | |
189 | ||
190 | if ((marvell_base & 0xffffffff00000000) == 0) | |
191 | marvell_base |= 0xffffffff00000000; | |
192 | ||
193 | printk("marvell_base set to 0x%016lx\n", marvell_base); | |
194 | } | |
195 | if (strncmp("cpuclock", ptr, strlen("cpuclock")) == 0) { | |
196 | cpu_clock = simple_strtol(ptr + strlen("cpuclock="), | |
197 | NULL, 10); | |
198 | printk("cpu_clock set to %d\n", cpu_clock); | |
199 | } | |
200 | i++; | |
201 | } | |
202 | printk("arcs_cmdline: %s\n", arcs_cmdline); | |
203 | ||
875d43e7 | 204 | #else /* CONFIG_64BIT */ |
1da177e4 LT |
205 | /* save the PROM vectors for debugging use */ |
206 | debug_vectors = cv; | |
207 | ||
208 | /* arg[0] is "g", the rest is boot parameters */ | |
209 | arcs_cmdline[0] = '\0'; | |
210 | for (i = 1; i < argc; i++) { | |
211 | if (strlen(arcs_cmdline) + strlen(arg[i] + 1) | |
212 | >= sizeof(arcs_cmdline)) | |
213 | break; | |
214 | strcat(arcs_cmdline, arg[i]); | |
215 | strcat(arcs_cmdline, " "); | |
216 | } | |
217 | ||
218 | while (*env) { | |
219 | if (strncmp("gtbase", *env, strlen("gtbase")) == 0) { | |
220 | marvell_base = simple_strtol(*env + strlen("gtbase="), | |
221 | NULL, 16); | |
222 | } | |
223 | if (strncmp("cpuclock", *env, strlen("cpuclock")) == 0) { | |
224 | cpu_clock = simple_strtol(*env + strlen("cpuclock="), | |
225 | NULL, 10); | |
226 | } | |
227 | env++; | |
228 | } | |
875d43e7 | 229 | #endif /* CONFIG_64BIT */ |
1da177e4 LT |
230 | mips_machgroup = MACH_GROUP_MOMENCO; |
231 | mips_machtype = MACH_MOMENCO_JAGUAR_ATX; | |
232 | ||
233 | #ifdef CONFIG_MV643XX_ETH | |
234 | /* get the base MAC address for on-board ethernet ports */ | |
235 | get_mac(prom_mac_addr_base); | |
236 | #endif | |
237 | } | |
238 | ||
239 | void __init prom_free_prom_memory(void) | |
240 | { | |
241 | } | |
242 | ||
243 | void __init prom_fixup_mem_map(unsigned long start, unsigned long end) | |
244 | { | |
245 | } | |
246 | ||
247 | int prom_boot_secondary(int cpu, unsigned long sp, unsigned long gp) | |
248 | { | |
249 | /* Clear the semaphore */ | |
250 | *(volatile uint32_t *)(0xbb000a68) = 0x80000000; | |
251 | ||
252 | return 1; | |
253 | } | |
254 | ||
255 | void prom_init_secondary(void) | |
256 | { | |
257 | clear_c0_config(CONF_CM_CMASK); | |
258 | set_c0_config(0x2); | |
259 | ||
260 | clear_c0_status(ST0_IM); | |
261 | set_c0_status(0x1ffff); | |
262 | } | |
263 | ||
264 | void prom_smp_finish(void) | |
265 | { | |
266 | } |