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
|
/*
* Mach Operating System
* Copyright (c) 1993-1991 Carnegie Mellon University
* Copyright (c) 1991 OMRON Corporation
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON AND OMRON ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON AND OMRON DISCLAIM ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* HISTORY
*/
/*
* Basic initialization for vme187.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/user.h>
#include <sys/reboot.h>
#include <sys/exec.h>
#include <vm/pmap.h>
#include <machine/vmparam.h>
#include <machine/cpu.h>
#include <machine/bug.h>
#define INITIAL_MHZ_GUESS 25.0
struct bugenv bugargs;
struct kernel{
void *entry;
void *symtab;
void *esym;
int bflags;
int bdev;
char *kname;
void *smini;
void *emini;
void *end_load;
}kflags;
char *esym;
int boothowto; /* read in kern/bootstrap */
int machineid;
#ifndef roundup
#define roundup(value, stride) (((unsigned)(value) + (stride) - 1) & ~((stride)-1))
#endif /* roundup */
vm_size_t mem_size;
vm_size_t rawmem_size;
vm_offset_t first_addr = 0;
vm_offset_t last_addr = 0;
vm_offset_t avail_start, avail_next, avail_end;
vm_offset_t virtual_avail, virtual_end;
void *end_loaded;
int bootdev;
int no_symbols;
vm_offset_t miniroot;
struct proc *lastproc;
pcb_t curpcb;
void cmmu_init(void);
double cycles_per_microsecond = INITIAL_MHZ_GUESS;
extern struct user *proc0paddr;
int bcd2int __P((unsigned int));
/*
* Called from locore.S during boot,
* this is the first C code that's run.
*/
void
m187_bootstrap(void)
{
extern char version[];
extern char *edata, *end;
extern int cold;
extern int kernelstart;
extern vm_offset_t size_memory(void);
struct bugbrdid brdid;
cold = 1; /* we are still booting */
bugbrdid(&brdid);
machineid = brdid.brdno;
vm_set_page_size();
#if 0
esym = kflags.esym;
boothowto = kflags.bflags;
bootdev = kflags.bdev;
#endif /* 0 */
#if 0
end_loaded = kflags.end_load;
if (esym != NULL) {
end = (char *)((int)(kflags.symtab));
} else {
first_addr = (vm_offset_t)&end;
}
#endif
first_addr = m88k_round_page(first_addr);
if (!no_symbols)
boothowto |= RB_KDB;
printf("about to probe\n");
#if 1
last_addr = size_memory();
#else
last_addr = (vm_offset_t)0x01000000;
physmem = btoc(last_addr);
#endif
printf("probing done\n");
cmmu_init();
avail_start = first_addr;
avail_end = last_addr;
printf("%s",version);
printf("M187 boot: memory from 0x%x to 0x%x\n", avail_start, avail_end);
/*
* Steal one page at the top of physical memory for msgbuf
*/
avail_end -= PAGE_SIZE;
pmap_bootstrap((vm_offset_t)&kernelstart - GOOFYLDOFFSET /* loadpt */,
&avail_start, &avail_end, &virtual_avail,
&virtual_end);
printf("returned from pmap_bootstrap\n");
/*
* Must initialize p_addr before autoconfig or
* the fault handler will get a NULL reference.
*/
proc0.p_addr = proc0paddr;
curproc = &proc0;
curpcb = &proc0paddr->u_pcb;
/* Initialize cached PTEs for u-area mapping. */
save_u_area(&proc0, proc0paddr);
/*
* Map proc0's u-area at the standard address (UADDR).
*/
load_u_area(&proc0);
/* Initialize the "u-area" pages. */
bzero((caddr_t)UADDR, UPAGES*NBPG);
printf("returning from init\n");
}
#ifdef notneeded
ipow(int base, int i)
{
int cnt = 1;
while (i--) {
cnt *= base;
}
return cnt;
}
int
bcd2int(unsigned int i)
{
unsigned val = 0;
int cnt = 0;
while (i) {
val += (i&0xf) * ipow(10,cnt);
cnt++;
i >>= 4;
}
return val;
}
#endif /* notneeded */
|
