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
|
/*
* linux/arch/m68k/sun3/config.c
*
* Copyright (C) 1996,1997 Pekka Pietik{inen
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file COPYING in the main directory of this archive
* for more details.
*/
#include <stdarg.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/kd.h>
#include <linux/tty.h>
#include <linux/console.h>
#include <linux/init.h>
#include <asm/oplib.h>
#include <asm/setup.h>
#include <asm/contregs.h>
#include <asm/movs.h>
#include <asm/pgtable.h>
#include <asm/sun3-head.h>
#include <asm/sun3mmu.h>
#include <asm/machdep.h>
#include <asm/intersil.h>
#include <asm/irq.h>
#include <asm/segment.h>
extern char _text, _end;
static int kernel_start, kernel_end;
char sun3_reserved_pmeg[SUN3_PMEGS_NUM];
extern unsigned long sun3_gettimeoffset(void);
extern int sun3_get_irq_list (char *);
extern void sun3_sched_init(void (*handler)(int, void *, struct pt_regs *));
extern void sun3_init_IRQ (void);
extern void (*sun3_default_handler[]) (int, void *, struct pt_regs *);
extern int sun3_request_irq (unsigned int irq, void (*handler)(int, void *, struct pt_regs *),
unsigned long flags, const char *devname, void *dev_id);
extern void sun3_free_irq (unsigned int irq, void *dev_id);
extern void sun3_enable_irq (unsigned int);
extern void sun3_disable_irq (unsigned int);
extern void sun3_enable_interrupts (void);
extern void sun3_disable_interrupts (void);
extern void sun3_get_model (unsigned char* model);
extern void idprom_init (void);
extern void sun3_gettod (int *yearp, int *monp, int *dayp,
int *hourp, int *minp, int *secp);
extern int sun3_hwclk(int set, struct hwclk_time *t);
extern unsigned long sun_serial_setup(unsigned long memory_start);
volatile char* clock_va;
extern unsigned char* sun3_intreg;
void __init sun3_init(void)
{
unsigned char enable_register;
int i;
m68k_machtype= MACH_SUN3;
m68k_cputype = CPU_68020;
m68k_fputype = FPU_68881; /* mc68881 actually */
m68k_mmutype = MMU_SUN3;
clock_va = (char *) 0xfe06000; /* dark */
sun3_intreg = (unsigned char *) 0xfe0a000; /* magic */
sun3_disable_interrupts();
prom_init((void *)LINUX_OPPROM_BEGVM);
GET_CONTROL_BYTE(AC_SENABLE,enable_register);
enable_register |= 0x40; /* Enable FPU */
SET_CONTROL_BYTE(AC_SENABLE,enable_register);
GET_CONTROL_BYTE(AC_SENABLE,enable_register);
/* This code looks suspicious, because it doesn't subtract
memory belonging to the kernel from the available space */
memset(sun3_reserved_pmeg, 0, sizeof(sun3_reserved_pmeg));
/* Reserve important PMEGS */
/* FIXME: These should be probed instead of hardcoded */
for (i=0; i<8; i++) /* Kernel PMEGs */
sun3_reserved_pmeg[i] = 1;
sun3_reserved_pmeg[247] = 1; /* ROM mapping */
sun3_reserved_pmeg[248] = 1; /* AMD Ethernet */
sun3_reserved_pmeg[251] = 1; /* VB area */
sun3_reserved_pmeg[254] = 1; /* main I/O */
sun3_reserved_pmeg[249] = 1;
sun3_reserved_pmeg[252] = 1;
sun3_reserved_pmeg[253] = 1;
set_fs(KERNEL_DS);
}
/* Without this, Bad Things happen when something calls arch_reset. */
static void sun3_reboot (void)
{
prom_reboot ("vmlinux");
}
static void sun3_halt (void)
{
prom_halt ();
}
void __init config_sun3(unsigned long *start_mem_p, unsigned long *end_mem_p)
{
printk("ARCH: SUN3\n");
idprom_init();
/* Subtract kernel memory from available memory */
mach_sched_init = sun3_sched_init;
mach_init_IRQ = sun3_init_IRQ;
mach_default_handler = &sun3_default_handler;
mach_request_irq = sun3_request_irq;
mach_free_irq = sun3_free_irq;
// mach_keyb_init = sun3_keyb_init;
enable_irq = sun3_enable_irq;
disable_irq = sun3_disable_irq;
mach_get_irq_list = sun3_get_irq_list;
mach_gettod = sun3_gettod;
mach_reset = sun3_reboot;
mach_gettimeoffset = sun3_gettimeoffset;
mach_get_model = sun3_get_model;
mach_hwclk = sun3_hwclk;
mach_halt = sun3_halt;
#ifndef CONFIG_SERIAL_CONSOLE
conswitchp = &dummy_con;
#endif
kernel_start = 0x00000000; /* NOT &_text */
kernel_end = ((((int)&_end) + 0x2000) & ~0x1fff) - 1;
*start_mem_p = kernel_end + 1;
// PROM seems to want the last couple of physical pages. --m
*end_mem_p = *(romvec->pv_sun3mem) + PAGE_OFFSET - 2*PAGE_SIZE;
m68k_num_memory=1;
m68k_memory[0].size=*(romvec->pv_sun3mem);
*start_mem_p = sun_serial_setup(*start_mem_p);
}
void __init sun3_sched_init(void (*timer_routine)(int, void *, struct pt_regs *))
{
sun3_disable_interrupts();
intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_DISABLE|INTERSIL_24H_MODE);
intersil_clock->int_reg=INTERSIL_HZ_100_MASK;
intersil_clear();
sun3_enable_irq(5);
intersil_clock->cmd_reg=(INTERSIL_RUN|INTERSIL_INT_ENABLE|INTERSIL_24H_MODE);
sun3_enable_interrupts();
intersil_clear();
}
|
