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
|
// SPDX-License-Identifier: GPL-2.0
/* Prom access routines for the sun3x */
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <asm/page.h>
#include <asm/setup.h>
#include <asm/traps.h>
#include <asm/sun3xprom.h>
#include <asm/idprom.h>
#include <asm/segment.h>
#include <asm/sun3ints.h>
#include <asm/openprom.h>
#include <asm/machines.h>
void (*sun3x_putchar)(int);
int (*sun3x_getchar)(void);
int (*sun3x_mayget)(void);
int (*sun3x_mayput)(int);
void (*sun3x_prom_reboot)(void);
e_vector sun3x_prom_abort;
struct linux_romvec *romvec;
/* prom vector table */
e_vector *sun3x_prom_vbr;
/* Handle returning to the prom */
void sun3x_halt(void)
{
unsigned long flags;
/* Disable interrupts while we mess with things */
local_irq_save(flags);
/* Restore prom vbr */
asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
/* Restore prom NMI clock */
// sun3x_disable_intreg(5);
sun3_enable_irq(7);
/* Let 'er rip */
asm volatile ("trap #14");
/* Restore everything */
sun3_disable_irq(7);
sun3_enable_irq(5);
asm volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
local_irq_restore(flags);
}
void sun3x_reboot(void)
{
/* This never returns, don't bother saving things */
local_irq_disable();
/* Restore prom vbr */
asm volatile ("movec %0,%%vbr" : : "r" ((void*)sun3x_prom_vbr));
/* Restore prom NMI clock */
sun3_disable_irq(5);
sun3_enable_irq(7);
/* Let 'er rip */
(*romvec->pv_reboot)("vmlinux");
}
static void sun3x_prom_write(struct console *co, const char *s,
unsigned int count)
{
while (count--) {
if (*s == '\n')
sun3x_putchar('\r');
sun3x_putchar(*s++);
}
}
/* debug console - write-only */
static struct console sun3x_debug = {
.name = "debug",
.write = sun3x_prom_write,
.flags = CON_PRINTBUFFER,
.index = -1,
};
void __init sun3x_prom_init(void)
{
/* Read the vector table */
sun3x_putchar = *(void (**)(int)) (SUN3X_P_PUTCHAR);
sun3x_getchar = *(int (**)(void)) (SUN3X_P_GETCHAR);
sun3x_mayget = *(int (**)(void)) (SUN3X_P_MAYGET);
sun3x_mayput = *(int (**)(int)) (SUN3X_P_MAYPUT);
sun3x_prom_reboot = *(void (**)(void)) (SUN3X_P_REBOOT);
sun3x_prom_abort = *(e_vector *) (SUN3X_P_ABORT);
romvec = (struct linux_romvec *)SUN3X_PROM_BASE;
idprom_init();
if (!((idprom->id_machtype & SM_ARCH_MASK) == SM_SUN3X)) {
pr_warn("Machine reports strange type %02x\n",
idprom->id_machtype);
pr_warn("Pretending it's a 3/80, but very afraid...\n");
idprom->id_machtype = SM_SUN3X | SM_3_80;
}
/* point trap #14 at abort.
* XXX this is futile since we restore the vbr first - oops
*/
vectors[VEC_TRAP14] = sun3x_prom_abort;
}
static int __init sun3x_debug_setup(char *arg)
{
/* If debug=prom was specified, start the debug console */
if (MACH_IS_SUN3X && !strcmp(arg, "prom"))
register_console(&sun3x_debug);
return 0;
}
early_param("debug", sun3x_debug_setup);
/* some prom functions to export */
int prom_getintdefault(int node, char *property, int deflt)
{
return deflt;
}
int prom_getbool (int node, char *prop)
{
return 1;
}
void prom_printf(char *fmt, ...)
{
}
void prom_halt (void)
{
sun3x_halt();
}
/* Get the idprom and stuff it into buffer 'idbuf'. Returns the
* format type. 'num_bytes' is the number of bytes that your idbuf
* has space for. Returns 0xff on error.
*/
unsigned char
prom_get_idprom(char *idbuf, int num_bytes)
{
int i;
/* make a copy of the idprom structure */
for (i = 0; i < num_bytes; i++)
idbuf[i] = ((char *)SUN3X_IDPROM)[i];
return idbuf[0];
}
|
