![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to kern_machdep.c CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / bsd / dev / ppc|
Return to kern_machdep.c CVS log | Up to [Apple XNU] / XNU / bsd / dev / ppc |
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: /*
23: * Copyright (C) 1990, 1993 NeXT, Inc.
24: * Copyright (C) 1997 Apple Computer, Inc.
25: *
26: * File: next/kern_machdep.c
27: * Author: John Seamons
28: *
29: * Machine-specific kernel routines.
30: *
31: * HISTORY
32: * 8-Dec-91 Peter King (king) at NeXT
33: * Added grade_cpu_subtype().
34: * FIXME: Do we want to merge this with check_cpu_subtype()?
35: *
36: * 5-Mar-90 John Seamons (jks) at NeXT
37: * Created.
38: */
39:
40: #include <sys/types.h>
41: #include <sys/param.h>
42: #include <mach/machine.h>
43: #include <mach/boolean.h>
44: #include <mach/vm_param.h>
45: #include <kern/cpu_number.h>
46:
47: int
48: check_cpu_subtype(cpu_subtype_t cpu_subtype)
49: {
50: struct machine_slot *ms = &machine_slot[cpu_number()];
51:
52: if (cpu_subtype == ms->cpu_subtype)
53: return (TRUE);
54:
55: if (cpu_subtype == CPU_SUBTYPE_POWERPC_601)
56: return (FALSE);
57:
58: switch (cpu_subtype) {
59: case CPU_SUBTYPE_POWERPC_Max:
60: case CPU_SUBTYPE_POWERPC_750:
61: case CPU_SUBTYPE_POWERPC_604e:
62: case CPU_SUBTYPE_POWERPC_604:
63: case CPU_SUBTYPE_POWERPC_603ev:
64: case CPU_SUBTYPE_POWERPC_603e:
65: case CPU_SUBTYPE_POWERPC_603:
66: case CPU_SUBTYPE_POWERPC_ALL:
67: return (TRUE);
68: }
69:
70: return (FALSE);
71: }
72:
73: /*
74: * Routine: grade_cpu_subtype()
75: *
76: * Function:
77: * Return a relative preference for cpu_subtypes in fat executable files.
78: * The higher the grade, the higher the preference.
79: * A grade of 0 means not acceptable.
80: */
81:
82: int
83: grade_cpu_subtype(cpu_subtype_t cpu_subtype)
84: {
85: struct machine_slot *ms = &machine_slot[cpu_number()];
86:
87: /*
88: * This code should match cpusubtype_findbestarch() in best_arch.c in the
89: * cctools project. As of 2/16/98 this is what has been agreed upon for
90: * the PowerPC subtypes. If an exact match is not found the subtype will
91: * be picked from the following order:
92: * Max, 750, 604e, 604, 603ev, 603e, 603, ALL
93: * Note the 601 is NOT in the list above. It is only picked via an exact
94: * match. For details see Radar 2213821.
95: *
96: * To implement this function to follow what was agreed upon above, we use
97: * the fact there are currently 9 different subtypes. Exact matches return
98: * the value 9, the value 0 is returned for 601 that is not an exact match,
99: * and the values 8 thru 1 are returned for the subtypes listed in the order
100: * above.
101: */
102: if (ms->cpu_subtype == cpu_subtype)
103: return 9;
104: if (cpu_subtype == CPU_SUBTYPE_POWERPC_601)
105: return 0;
106: switch (cpu_subtype) {
107: case CPU_SUBTYPE_POWERPC_Max:
108: return 8;
109: case CPU_SUBTYPE_POWERPC_750:
110: return 7;
111: case CPU_SUBTYPE_POWERPC_604e:
112: return 6;
113: case CPU_SUBTYPE_POWERPC_604:
114: return 5;
115: case CPU_SUBTYPE_POWERPC_603ev:
116: return 4;
117: case CPU_SUBTYPE_POWERPC_603e:
118: return 3;
119: case CPU_SUBTYPE_POWERPC_603:
120: return 2;
121: case CPU_SUBTYPE_POWERPC_ALL:
122: return 1;
123: }
124: /*
125: * If we get here it is because it is a cpusubtype we don't support (602 and
126: * 620) or new cpusubtype that was added since this code was written. Both
127: * will be considered unacceptable.
128: */
129: return 0;
130: }
131:
132: boolean_t
133: kernacc(
134: off_t start,
135: size_t len
136: )
137: {
138: off_t base;
139: off_t end;
140:
141: base = trunc_page(start);
142: end = start + len;
143:
144: while (base < end) {
145: if(kvtophys((vm_offset_t)base) == NULL)
146: return(FALSE);
147: base += page_size;
148: }
149:
150: return (TRUE);
151: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.