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
|
/**
** @file kdefs.h
**
** @author CSCI-452 class of 20245
**
** @brief Kernel-only declarations.
*/
#ifndef KDEFS_H_
#define KDEFS_H_
// debugging macros
#include <debug.h>
/*
** General (C and/or assembly) definitions
*/
// page sizes
#define SZ_PAGE NUM_4KB
#define SZ_BIGPAGE NUM_4MB
// kernel stack size (bytes)
#define N_KSTKPAGES 1
#define SZ_KSTACK (N_KSTKPAGES * SZ_PAGE)
// user stack size
#define N_USTKPAGES 2
#define SZ_USTACK (N_USTKPAGES * SZ_PAGE)
// declarations for modulus checking of (e.g.) sizes and addresses
#define MOD4_BITS 0x00000003
#define MOD4_MASK 0xfffffffc
#define MOD4_INC 0x00000004
#define MOD4_SHIFT 2
#define MOD16_BITS 0x0000000f
#define MOD16_MASK 0xfffffff0
#define MOD16_INC 0x00000010
#define MOD16_SHIFT 4
#define MOD1K_BITS 0x000003ff
#define MOD1K_MASK 0xfffffc00
#define MOD1K_INC 0x00000400
#define MOD1K_SHIFT 10
#define MOD4K_BITS 0x00000fff
#define MOD4K_MASK 0xfffff000
#define MOD4K_INC 0x00001000
#define MOD4K_SHIFT 12
#define MOD1M_BITS 0x000fffff
#define MOD1M_MASK 0xfff00000
#define MOD1M_INC 0x00100000
#define MOD1M_SHIFT 20
#define MOD4M_BITS 0x003fffff
#define MOD4M_MASK 0xffc00000
#define MOD4M_INC 0x00400000
#define MOD4M_SHIFT 22
#define MOD1G_BITS 0x3fffffff
#define MOD1G_MASK 0xc0000000
#define MOD1G_INC 0x40000000
#define MOD1G_SHIFT 30
#ifndef ASM_SRC
/*
** Start of C-only definitions
*/
// unit conversion macros
#define B_TO_KB(x) (((uint_t)(x))>>10)
#define B_TO_MB(x) (((uint_t)(x))>>20)
#define B_TO_GB(x) (((uint_t)(x))>>30)
#define KB_TO_B(x) (((uint_t)(x))<<10)
#define KB_TO_MB(x) (((uint_t)(x))>>10)
#define KB_TO_GB(x) (((uint_t)(x))>>20)
#define MB_TO_B(x) (((uint_t)(x))<<20)
#define MB_TO_KB(x) (((uint_t)(x))<<10)
#define MB_TO_GB(x) (((uint_t)(x))>>10)
#define GB_TO_B(x) (((uint_t)(x))<<30)
#define GB_TO_KB(x) (((uint_t)(x))<<20)
#define GB_TO_MB(x) (((uint_t)(x))<<10)
// potetially useful compiler attributes
#define ATTR_ALIGNED(x) __attribute__((__aligned__(x)))
#define ATTR_PACKED __attribute__((__packed__))
#define ATTR_UNUSED __attribute__((__unused__))
/*
** Utility macros
*/
//
// macros to clear data structures
//
// these are usable for clearing single-valued data items (e.g.,
// a PCB, etc.)
#define CLEAR(v) memclr( &v, sizeof(v) )
#define CLEAR_PTR(p) memclr( p, sizeof(*p) )
//
// macros for access registers and system call arguments
//
// REG(pcb,x) -- access a specific register in a process context
#define REG(pcb,x) ((pcb)->context->x)
// RET(pcb) -- access return value register in a process context
#define RET(pcb) ((pcb)->context->eax)
// ARG(pcb,n) -- access argument #n from the indicated process
//
// ARG(pcb,0) --> return address
// ARG(pcb,1) --> first parameter
// ARG(pcb,2) --> second parameter
// etc.
//
// ASSUMES THE STANDARD 32-BIT ABI, WITH PARAMETERS PUSHED ONTO THE
// STACK. IF THE PARAMETER PASSING MECHANISM CHANGES, SO MUST THIS!
#define ARG(pcb,n) ( ( (uint32_t *) (((pcb)->context) + 1) ) [(n)] )
/*
** Types
*/
/*
** Globals
*/
// general-purpose character buffer
extern char b256[256];
// buffer for use by PANIC() macro
extern char b512[512];
// kernel stack
extern uint8_t kstack[SZ_KSTACK];
/*
** Prototypes
*/
#endif /* !ASM_SRC */
#endif
|
