aboutsummaryrefslogtreecommitdiff
path: root/arch/mips/momentum/ocelot_c/prom.c
blob: b689ceea8cfbf1b4244b61bd46321ac369184f92 (plain)
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
/*
 * 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/init.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include <linux/bootmem.h>
#include <linux/mv643xx.h>

#include <asm/addrspace.h>
#include <asm/bootinfo.h>
#include <asm/pmon.h>

#include "ocelot_c_fpga.h"

struct callvectors* debug_vectors;

extern unsigned long marvell_base;
extern unsigned int cpu_clock;

const char *get_system_type(void)
{
#ifdef CONFIG_CPU_SR71000
	return "Momentum Ocelot-CS";
#else
	return "Momentum Ocelot-C";
#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;

#ifndef CONFIG_64BIT
	debug_vectors->printf("Booting Linux kernel...\n");
#endif
}

void __init prom_free_prom_memory(void)
{
}