summaryrefslogtreecommitdiffstats
path: root/arch/mips/lasat/prom.c
blob: 88c7ab871ec44bbe0c4f7dae9a92ca5c58b36da7 (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
/*
 * PROM interface routines.
 */
#include <linux/types.h>
#include <linux/init.h>
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/ioport.h>
#include <asm/bootinfo.h>
#include <asm/lasat/lasat.h>
#include <asm/cpu.h>

#include "at93c.h"
#include <asm/lasat/eeprom.h>
#include "prom.h"

#define RESET_VECTOR	0xbfc00000
#define PROM_JUMP_TABLE_ENTRY(n) (*((u32 *)(RESET_VECTOR + 0x20) + n))
#define PROM_DISPLAY_ADDR	PROM_JUMP_TABLE_ENTRY(0)
#define PROM_PUTC_ADDR		PROM_JUMP_TABLE_ENTRY(1)
#define PROM_MONITOR_ADDR	PROM_JUMP_TABLE_ENTRY(2)

static void null_prom_printf(const char * fmt, ...)
{
}

static void null_prom_display(const char *string, int pos, int clear)
{
}

static void null_prom_monitor(void)
{
}

static void null_prom_putc(char c)
{
}

/* these are functions provided by the bootloader */
static void (* prom_putc)(char c) = null_prom_putc;
void (* prom_printf)(const char * fmt, ...) = null_prom_printf;
void (* prom_display)(const char *string, int pos, int clear) =
		null_prom_display;
void (* prom_monitor)(void) = null_prom_monitor;

unsigned int lasat_ndelay_divider;

#define PROM_PRINTFBUF_SIZE 256
static char prom_printfbuf[PROM_PRINTFBUF_SIZE];

static void real_prom_printf(const char * fmt, ...)
{
	va_list ap;
	int len;
	char *c = prom_printfbuf;
	int i;

	va_start(ap, fmt);
	len = vsnprintf(prom_printfbuf, PROM_PRINTFBUF_SIZE, fmt, ap);
	va_end(ap);

	/* output overflowed the buffer */
	if (len < 0 || len > PROM_PRINTFBUF_SIZE)
		len = PROM_PRINTFBUF_SIZE;

	for (i=0; i < len; i++) {
		if (*c == '\n')
			prom_putc('\r');
		prom_putc(*c++);
	}
}

static void setup_prom_vectors(void)
{
	u32 version = *(u32 *)(RESET_VECTOR + 0x90);

	if (version >= 307) {
		prom_display = (void *)PROM_DISPLAY_ADDR;
		prom_putc = (void *)PROM_PUTC_ADDR;
		prom_printf = real_prom_printf;
		prom_monitor = (void *)PROM_MONITOR_ADDR;
	}
	prom_printf("prom vectors set up\n");
}

static struct at93c_defs at93c_defs[N_MACHTYPES] = {
	{(void *)AT93C_REG_100, (void *)AT93C_RDATA_REG_100, AT93C_RDATA_SHIFT_100,
	AT93C_WDATA_SHIFT_100, AT93C_CS_M_100, AT93C_CLK_M_100},
	{(void *)AT93C_REG_200, (void *)AT93C_RDATA_REG_200, AT93C_RDATA_SHIFT_200,
	AT93C_WDATA_SHIFT_200, AT93C_CS_M_200, AT93C_CLK_M_200},
};

void __init prom_init(void)
{
	int argc = fw_arg0;
	char **argv = (char **) fw_arg1;

	setup_prom_vectors();

	if (current_cpu_data.cputype == CPU_R5000) {
	        prom_printf("LASAT 200 board\n");
		mips_machtype = MACH_LASAT_200;
                lasat_ndelay_divider = LASAT_200_DIVIDER;
        } else {
	        prom_printf("LASAT 100 board\n");
		mips_machtype = MACH_LASAT_100;
                lasat_ndelay_divider = LASAT_100_DIVIDER;
        }

	at93c = &at93c_defs[mips_machtype];

	lasat_init_board_info();		/* Read info from EEPROM */

	mips_machgroup = MACH_GROUP_LASAT;

	/* Get the command line */
	if (argc > 0) {
		strncpy(arcs_cmdline, argv[0], CL_SIZE-1);
		arcs_cmdline[CL_SIZE-1] = '\0';
	}

	/* Set the I/O base address */
	set_io_port_base(KSEG1);

	/* Set memory regions */
	ioport_resource.start = 0;
	ioport_resource.end = 0xffffffff;	/* Wrong, fixme.  */

	add_memory_region(0, lasat_board_info.li_memsize, BOOT_MEM_RAM);
}

unsigned long __init prom_free_prom_memory(void)
{
	return 0;
}

const char *get_system_type(void)
{
	return lasat_board_info.li_bmstr;
}