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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /* Copyright (c) 1993,1995 NeXT Computer, Inc. All Rights Reserved */
23: /*
24: * The NEXTSTEP Software License Agreement specifies the terms
25: * and conditions for redistribution.
26: *
27: */
28:
29: #ifndef _PPC_PARAM_H_
30: #define _PPC_PARAM_H_
31:
32: /*
33: * Round p (pointer or byte index) up to a correctly-aligned value for all
34: * data types (int, long, ...). The result is u_int and must be cast to
35: * any desired pointer type.
36: */
37: #define ALIGNBYTES 3
38: #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
39:
40: #define NBPG 4096 /* bytes/page */
41: #define PGOFSET (NBPG-1) /* byte offset into page */
42: #define PGSHIFT 12 /* LOG2(NBPG) */
43:
44: #define NBSEG 0x40000000 /* bytes/segment (quadrant) */
45: #define SEGOFSET (NBSEG-1) /* byte offset into segment */
46: #define SEGSHIFT 30 /* LOG2(NBSEG) */
47:
48: #define DEV_BSIZE 512
49: #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
50: #define BLKDEV_IOSIZE 2048
51: #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
52:
53: #define STACK_GROWTH_UP 0 /* stack grows to lower addresses */
54:
55: #define CLSIZE 1
56: #define CLSIZELOG2 0
57:
58: #define STACKSIZE 4 /* pages in kernel stack */
59: #define UPAGES (USIZE+STACKSIZE) /* total pages in u-area */
60: /* red zone is beyond this */
61:
62: /*
63: * Constants related to network buffer management.
64: * MCLBYTES must be no larger than CLBYTES (the software page size), and,
65: * on machines that exchange pages of input or output buffers with mbuf
66: * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
67: * of the hardware page size.
68: */
69: #define MSIZE 256 /* size of an mbuf */
70: #define MCLBYTES 2048 /* large enough for ether MTU */
71: #define MCLSHIFT 11
72: #define MCLOFSET (MCLBYTES - 1)
73: #ifndef NMBCLUSTERS
74: #if GATEWAY
75: #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES) /* cl map size: 1MB */
76: #else
77: #define NMBCLUSTERS ((1024 * 1024) / MCLBYTES)
78: /* cl map size was 0.5MB when MSIZE was 128, now it's 1MB*/
79: #endif
80: #endif
81:
82: /* pages ("clicks") (NBPG bytes) to disk blocks */
83: #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
84: #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
85: #define dtob(x) ((x)<<DEV_BSHIFT)
86:
87: /* pages to bytes */
88: #define ctob(x) ((x)<<PGSHIFT)
89:
90: /* bytes to pages */
91: #define btoc(x) (((unsigned)(x)+(PGOFSET))>>PGSHIFT)
92: #ifdef __APPLE__
93: #define btodb(bytes, devBlockSize) \
94: ((unsigned)(bytes) / devBlockSize)
95: #define dbtob(db, devBlockSize) \
96: ((unsigned)(db) * devBlockSize)
97: #else
98: #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
99: ((unsigned)(bytes) >> DEV_BSHIFT)
100: #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
101: ((unsigned)(db) << DEV_BSHIFT)
102: #endif
103:
104: /*
105: * Map a ``block device block'' to a file system block.
106: * This should be device dependent, and should use the bsize
107: * field from the disk label.
108: * For now though just use DEV_BSIZE.
109: */
110: #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
111:
112: /* from machdep/ppc/proc_reg.h */
113: #if __BIG_ENDIAN__
114: #define ENDIAN_MASK(val,size) (1 << (size-1 - val))
115: #else
116: #error code not ported to little endian targets yet
117: #endif /* __BIG_ENDIAN__ */
118:
119: #ifndef MASK
120: #define MASK(PART) ENDIAN_MASK(PART ## _BIT, 32)
121: #endif
122:
123: #define MSR_EE_BIT 16
124: #define MSR_PR_BIT 17
125: #define USERMODE(msr) (msr & MASK(MSR_PR) ? TRUE : FALSE)
126: #define BASEPRI(msr) (msr & MASK(MSR_EE) ? TRUE : FALSE)
127: /* end of from proc_reg.h */
128:
129: #if defined(KERNEL) || defined(STANDALONE)
130: #define DELAY(n) delay(n)
131: #else
132: #define DELAY(n) { register int N = (n); while (--N > 0); }
133: #endif /* defined(KERNEL) || defined(STANDALONE) */
134:
135: #define NPIDS 16 /* maximum number of PIDs per process */
136: #define NIOPIDS 8 /* maximum number of IO space PIDs */
137:
138: #endif /* _PPC_PARAM_H_ */
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