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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * The NEXTSTEP Software License Agreement specifies the terms
28: * and conditions for redistribution.
29: *
30: */
31:
32: #ifndef _PPC_PARAM_H_
33: #define _PPC_PARAM_H_
34:
35: /*
36: * Round p (pointer or byte index) up to a correctly-aligned value for all
37: * data types (int, long, ...). The result is u_int and must be cast to
38: * any desired pointer type.
39: */
40: #define ALIGNBYTES 3
41: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
42:
43: #define NBPG 4096 /* bytes/page */
44: #define PGOFSET (NBPG-1) /* byte offset into page */
45: #define PGSHIFT 12 /* LOG2(NBPG) */
46:
47: #define NBSEG 0x40000000 /* bytes/segment (quadrant) */
48: #define SEGOFSET (NBSEG-1) /* byte offset into segment */
49: #define SEGSHIFT 30 /* LOG2(NBSEG) */
50:
51: #define DEV_BSIZE 512
52: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
53: #define BLKDEV_IOSIZE 2048
54: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
55:
56: #define STACK_GROWTH_UP 0 /* stack grows to lower addresses */
57:
58: #define CLSIZE 1
59: #define CLSIZELOG2 0
60:
61: #define STACKSIZE 4 /* pages in kernel stack */
62: #define UPAGES (USIZE+STACKSIZE) /* total pages in u-area */
63: /* red zone is beyond this */
64:
65: /*
66: * Constants related to network buffer management.
67: * MCLBYTES must be no larger than CLBYTES (the software page size), and,
68: * on machines that exchange pages of input or output buffers with mbuf
69: * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
70: * of the hardware page size.
71: */
72: #define MSIZE 256 /* size of an mbuf */
73: #define MCLBYTES 2048 /* large enough for ether MTU */
74: #define MCLSHIFT 11
75: #define MCLOFSET (MCLBYTES - 1)
76: #ifndef NMBCLUSTERS
77: #ifdef GATEWAY
78: #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */
79: #else
80: #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES)
81: /* cl map size was 0.5MB when MSIZE was 128, now it's 1MB*/
82: #endif
83: #endif
84:
85: /* pages ("clicks") (NBPG bytes) to disk blocks */
86: #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
87: #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
88: #define dtob(x) ((x)<<DEV_BSHIFT)
89:
90: /* pages to bytes */
91: #define ctob(x) ((x)<<PGSHIFT)
92:
93: /* bytes to pages */
94: #define btoc(x) (((unsigned)(x)+(PGOFSET))>>PGSHIFT)
95: #ifdef __APPLE__
96: #define btodb(bytes, devBlockSize) \
97: ((unsigned)(bytes) / devBlockSize)
98: #define dbtob(db, devBlockSize) \
99: ((unsigned)(db) * devBlockSize)
100: #else
101: #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
102: ((unsigned)(bytes) >> DEV_BSHIFT)
103: #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
104: ((unsigned)(db) << DEV_BSHIFT)
105: #endif
106:
107: /*
108: * Map a ``block device block'' to a file system block.
109: * This should be device dependent, and should use the bsize
110: * field from the disk label.
111: * For now though just use DEV_BSIZE.
112: */
113: #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
114:
115: /* from machdep/ppc/proc_reg.h */
116: #if __BIG_ENDIAN__
117: #define ENDIAN_MASK(val,size) (1 << (size-1 - val))
118: #else
119: #error code not ported to little endian targets yet
120: #endif /* __BIG_ENDIAN__ */
121:
122: #ifndef MASK
123: #define MASK(PART) ENDIAN_MASK(PART ## _BIT, 32)
124: #endif
125:
126: #define MSR_EE_BIT 16
127: #define MSR_PR_BIT 17
128: #define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
129: #define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
130: /* end of from proc_reg.h */
131:
132: #ifndef __ASSEMBLER__
133: /*
134: * Pull in our definition of simple_lock_data_t.
135: */
136: #import <mach/machine/simple_lock.h>
137:
138: #endif /* __ASSEMBLER__ */
139:
140: #if defined(_KERNEL) || defined(STANDALONE)
141: #define DELAY(n) us_spin(n)
142: #else
143: #define DELAY(n) { register int N = (n); while (--N > 0); }
144: #endif /* defined(_KERNEL) || defined(STANDALONE) */
145:
146: #define NPIDS 16 /* maximum number of PIDs per process */
147: #define NIOPIDS 8 /* maximum number of IO space PIDs */
148:
149: #endif /* _PPC_PARAM_H_ */
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