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1.1 root 1: /* (-lgl
2: * COHERENT Version 3.0
3: * Copyright (c) 1982, 1990 by Mark Williams Company.
4: * All rights reserved. May not be copied without permission.
5: -lgl) */
6: /*
7: * Machine dependent definitions.
8: * 80386 Coherent, IBM PC.
9: */
10: #ifndef MACHINE_H
11: #define MACHINE_H MACHINE_H
12:
13: #include <sys/types.h>
14: #include <sys/param.h>
15:
16: /*
17: * Alloc definitions.
18: */
19: #define align(p) ((ALL *) ((int) (p) & ~1))
20: #define link(p) align((p)->a_link)
21: #define tstfree(p) (((int) (p)->a_link&1) == 0)
22: #define setfree(p) ((p)->a_link = (int) (p)->a_link & ~1)
23: #define setused(p) ((p)->a_link = (int) (p)->a_link | 1)
24:
25:
26: /*
27: * Functions.
28: * blockn - block number from byte number
29: * blocko - block offset from byte number
30: * nbnrem - offset into indirect block from block number
31: * nbndiv - residual indirect mapping from block number
32: * btocru - byte to click (saddr_t) rounding up
33: * btocrd - byte to click rounding down
34: * ctob - click to byte
35: * stod - saddr_t to daddr_t conversion for swapper.
36: */
37:
38: #define NIVEC 192
39:
40: #define blockn(n) ((n)>>9)
41: #define blocko(n) ((n)&(512-1))
42: #define nbnrem(b) ((int)(b)&(128-1))
43: #define nbndiv(b) ((b)>>7)
44:
45:
46: #define btos(n) ((((unsigned long)(n))+(1<<BPSSHIFT)-1) >> BPSSHIFT)
47: #define btosrd(n) (((unsigned long)(n)) >> BPSSHIFT)
48: #define stob(n) (((long)(n)) << BPSSHIFT)
49:
50: #define btoc(n) ((((unsigned long)(n))+NBPC-1) >> BPCSHIFT)
51: #define btocrd(n) (((unsigned long)(n)) >> BPCSHIFT)
52: #define ctob(n) (((long)(n)) << BPCSHIFT)
53:
54: #define ctos(x) (((x) + (1<<SG1SHIFT)-1) >> SG1SHIFT)
55: #define ctosrd(x) ((x) >> SG1SHIFT)
56: #define stoc(x) ((x) << SG1SHIFT)
57:
58: /*
59: * The saved registers are accessed
60: * via constant offsets from the top of the
61: * user area stack. The symbols defined below,
62: * are the offsets, in words, from the initial system
63: * stack. The offsets depend on the actual save order
64: * defined by "tsave" in the assist.
65: */
66: #define SS 18
67: #define UESP 17
68: #define EFL 16
69: #define CS 15
70: #define EIP 14
71: #define ERR 13
72: #define TRAPNO 12
73: #define EAX 11
74: #define ECX 10
75: #define EDX 9
76: #define EBX 8
77: #define ESP 7
78: #define EBP 6
79: #define ESI 5
80: #define EDI 4
81: #define DS 3
82: #define ES 2
83: #define FS 1
84: #define GS 0
85:
86: /*
87: * These are not put on the stack, but they have slots in the table
88: * global_reg[]. These numbers are the offsets into that table.
89: */
90: #define RCR0 19
91: #define RCR1 20
92: #define RCR2 21
93: #define RCR3 22
94:
95: /*
96: * How many register slots do we recognise?
97: */
98: #define NUM_REG 23
99:
100: /*
101: * Buffers are not mapped.
102: */
103: #define bsave(o)
104: #define brest(o)
105: #define bmapv(p)
106: #define bconv(p) (p)
107:
108: /*
109: * Drivers are not mapped.
110: */
111: #define dsave(o)
112: #define drest(o)
113: #define dmapv(s)
114: #define dvirt() 0
115: #define dcopy(dst,src)
116:
117: #define mfixcon(pp) /* do nothing */
118:
119: /*
120: * Register structure.
121: */
122: typedef union mreg_u {
123: unsigned m_reg[1];
124: unsigned m_int;
125: } MREG;
126:
127: /*
128: * Segmenation prototype.
129: */
130: typedef struct mproto {
131: unsigned mp_csl;
132: unsigned mp_dsl;
133: vaddr_t mp_svb;
134: vaddr_t mp_svl;
135: } MPROTO;
136:
137: /*
138: * Set jump and return structure.
139: */
140: typedef struct menv_s {
141: int me_di;
142: int me_si;
143: int mc_bx;
144: int me_bp;
145: int me_sp;
146: int me_pc;
147: int me_fw;
148: } MENV;
149:
150: /*
151: * Context structure.
152: */
153: typedef struct mcon_s {
154: int mc_di;
155: int mc_si;
156: int mc_bx;
157: int mc_bp;
158: int mc_sp;
159: int mc_pc;
160: int mc_fw;
161: } MCON;
162:
163: /*
164: * General register structure.
165: */
166: typedef int MGEN[1];
167:
168: /*
169: * Useful definitions.
170: */
171: #define PIC 0x20 /* 8259 command port */
172: #define PICM 0x21 /* 8259 mask port */
173: #define SPIC 0xA0 /* Slave 8259 command port */
174: #define SPICM 0xA1 /* Slave 8259 mask port */
175: #define MFTTB 0x0100 /* Trace trap bit */
176: #define MFINT 0x0200 /* Interupt enable */
177: #define MUERR 0x0002 /* Location of errno */
178: #define MFCBIT 0x0001 /* Carry bit */
179:
180: /*
181: * Trap codes.
182: * Passed in the upper 8 bits of
183: * the "id" passed to "trap".
184: */
185: #define SIDIV 0 /* Divide overflow */
186: #define SISST 1 /* Single step */
187: #define SINMI 2 /* NMI (parity) */
188: #define SIBPT 3 /* Breakpoint */
189: #define SIOVF 4 /* Overflow */
190: #define SIBND 5 /* Bound */
191: #define SIOP 6 /* Invalid opcode */
192: #define SIXNP 7 /* Processor extension not available */
193: #define SIDBL 8 /* Double exception */
194: #define SIXS 9 /* Processor extension segment overrun */
195: #define SITS 10 /* Invalid task state segment */
196: #define SINP 11 /* Segment not present */
197: #define SISS 12 /* Stack segment overrun/not present */
198: #define SIGP 13 /* General protection */
199: #define SIPF 14 /* Page Fault */
200: #define SIFP 16 /* Floating Point */
201: #define SISYS 32 /* System call */
202: #define SIRAN 33 /* Random interrupt */
203: #define SIOSYS 34 /* System call */
204: #define SIDEV 64 /* Device interrupt */
205:
206: /*
207: * For accessing high and low words of a long.
208: */
209: struct l {
210: int l_lo;
211: int l_hi;
212: };
213: #define msetppc(v) u.u_regl[EIP] = (int)v
214:
215: #endif
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