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