aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/momentum/jaguar_atx/prom.c
blob: 5dd154ee58f68306e666aee3fcb5b8e92847e63a (plain) (blame)
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
/*
 * 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.
 *
 * Added changes for SMP - Manish Lachwani (lachwani@pmc-sierra.com)
 */
#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 "jaguar_atx_fpga.h"

extern void ja_setup_console(void);

struct callvectors *debug_vectors;

extern unsigned long cpu_clock;

const char *get_system_type(void)
{
	return "Momentum Jaguar-ATX";
}

#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++;
	l = (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
	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
	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 */

/* PMON passes arguments in C main() style */
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_SERIAL_8250_CONSOLE
//	ja_setup_console();	/* The very first thing.  */
#endif

#ifdef CONFIG_64BIT
	char *ptr;

	printk("Mips64 Jaguar-ATX\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_JAGUAR_ATX;
}

void __init prom_free_prom_memory(void)
{
}

void __init prom_fixup_mem_map(unsigned long start, unsigned long end)
{
}

int prom_boot_secondary(int cpu, unsigned long sp, unsigned long gp)
{
	/* Clear the semaphore */
	*(volatile uint32_t *)(0xbb000a68) = 0x80000000;

	return 1;
}

void prom_init_secondary(void)
{
        clear_c0_config(CONF_CM_CMASK);
        set_c0_config(0x2);

	clear_c0_status(ST0_IM);
	set_c0_status(0x1ffff);
}

void prom_smp_finish(void)
{
}