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
/*
* Memory and machine-specific definitions. Used in C and assembler.
*/
/*
* Sizes
*/
#define BI2BY 8 /* bits per byte */
#define BI2WD 32 /* bits per word */
#define BY2WD 4 /* bytes per word */
#define BY2PG 4096 /* bytes per page */
#define WD2PG (BY2PG/BY2WD) /* words per page */
#define PGSHIFT 12 /* log(BY2PG) */
#define MAXMACH 1 /* max # cpus system can run */
/*
* Time
*/
#define HZ (60) /* clock frequency */
#define MS2HZ (1000/HZ) /* millisec per clock tick */
#define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
#define TK2MS(t) ((((ulong)(t))*1000)/HZ) /* ticks to milliseconds */
#define MS2TK(t) ((((ulong)(t))*HZ)/1000) /* milliseconds to ticks */
/*
* SR bits
*/
#define SUPER 0x2000
#define SPL(n) (n<<8)
/*
* CACR
*/
#define CCLEAR 0x08
#define CENABLE 0x01
/*
* Magic registers
*/
#define MACH 28 /* R28 is m-> */
#define USER 27 /* R27 is u-> */
/*
* Fundamental addresses
*/
#define USERADDR 0x80000000
#define UREGADDR (USERADDR+BY2PG-(2+4+2+(8+8+1)*BY2WD))
/*
* Devices poked during bootstrap
*/
#define TACADDR 0x40600000
#define MOUSE 0x40200000
/*
* MMU
*/
#define VAMASK 0x1FFFFFFF
/*
* MMU entries
*/
#define PTEVALID (1<<31)
#define PTEWRITE (1<<30)
#define PTEKERNEL (1<<29)
#define PTENOCACHE (1<<28)
#define PTEMAINMEM (0<<26)
#define PTEIO (1<<26)
#define PTEACCESS (1<<25)
#define PTEMODIFY (1<<24)
#define PTERONLY 0 /* BUG */
#define INVALIDPTE 0
#define PPN(pa) ((pa>>12)&0xFFFF)
#define KMAP ((unsigned long *)0xD0000000)
#define UMAP ((unsigned long *)0x50000000)
/*
* Virtual addresses
*/
#define VTAG(va) ((va>>22)&0x03F)
#define VPN(va) ((va>>13)&0x1FF)
#define PARAM ((char*)0x40500000)
#define TLBFLUSH_ 0x01
/*
* Address spaces
*/
#define UZERO 0x00000000 /* base of user address space */
#define UTZERO (UZERO+BY2PG) /* first address in user text */
#define TSTKTOP 0x10000000 /* end of new stack in sysexec */
#define USTKTOP (TSTKTOP-100*BY2PG) /* byte just beyond user stack */
#define KZERO 0x10000000 /* base of kernel address space */
#define KTZERO (KZERO+4*BY2PG) /* first address in kernel text */
#define USTACKSIZE (4*1024*1024) /* size of user stack */
#define NSEG 5
#define MACHSIZE 4096