![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to vm_param.h CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [Apple XNU] / XNU / osfmk / mach / i386|
Return to vm_param.h CVS log | Up to [Apple XNU] / XNU / osfmk / mach / i386 |
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: * @OSF_COPYRIGHT@
24: */
25: /*
26: * HISTORY
27: *
28: * Revision 1.2 1998/09/30 21:21:01 wsanchez
29: * Merged in IntelMerge1 (mburg: Intel support)
30: *
31: * Revision 1.1.1.1.6.1 1998/09/30 18:14:00 mburg
32: * Changes for Intel port
33: *
34: * Revision 1.1.1.1 1998/09/22 21:05:31 wsanchez
35: * Import of Mac OS X kernel (~semeria)
36: *
37: * Revision 1.1.1.1 1998/03/07 02:25:47 wsanchez
38: * Import of OSF Mach kernel (~mburg)
39: *
40: * Revision 1.2.45.1 1997/03/27 18:53:17 barbou
41: * Replaced reference to cpu_x86_model in PMAP_ENTER_386_CHECK() macro
42: * (replaced by cpuid_family).
43: * [addis]
44: * Remove i386 specific PMAP_ENTER macro.
45: * [95/08/29 rwd]
46: * [97/02/26 barbou]
47: *
48: * Revision 1.2.9.13 1996/07/31 09:57:05 paire
49: * Merged with nmk20b7_shared (1.2.39.1)
50: * [96/07/24 paire]
51: *
52: * Revision 1.2.39.1 1996/06/13 12:39:45 bernadat
53: * Linux drivers support:
54: * Arrange so that physical memory is mapped at
55: * identical virtual addresses.
56: * User segment linear address remains 0
57: * kernel segment linear address is now LINEAR_KERNEL_ADDRESS
58: * Kernel and user segments linear address now differ.
59: * [96/06/04 bernadat]
60: *
61: * Revision 1.2.9.12 1996/02/02 12:19:49 emcmanus
62: * Merged with nmk20b5_shared.
63: * [1996/02/02 11:57:41 emcmanus]
64: *
65: * Checked in prior to merge.
66: * [1996/02/02 11:40:14 emcmanus]
67: *
68: * Revision 1.2.9.11 1996/01/29 13:15:45 bernadat
69: * 0xefffffff is much to large for VM_MAX_KERNEL_LOADED_ADDRESS.
70: * Page tables overwrite BIOS ! Must find away to dynamically
71: * allocate kernel page tables. Set it to 0xdfffffff.
72: * [96/01/29 bernadat]
73: *
74: * Revision 1.2.9.10 1996/01/25 12:58:26 bernadat
75: * Linux Server Support:
76: * increased VM_MAX_KERNEL_LOADED_ADDRESS.
77: * [95/12/28 barbou]
78: *
79: * Revision 1.2.34.1 1995/12/30 17:12:54 emcmanus
80: * Defined machine_btop here to avoid ugly #ifdefs in drivers.
81: * [1995/12/30 17:04:42 emcmanus]
82: *
83: * Revision 1.2.9.9 1995/06/13 18:40:24 bolinger
84: * Broader fix for ri-osc CR1387: for x86 only, change PMAP_ENTER
85: * to ensure that VM_PROT_WRITE is always set on calls to change
86: * kernel_pmap.
87: * [1995/06/12 19:16:51 bolinger]
88: *
89: * Revision 1.2.9.8 1995/05/22 20:26:50 dwm
90: * ri-osc CR1340 - turning off TASK_SWAPPER doesn't eliminate
91: * thread swapping, so kernel stack size must be congruent with
92: * zero mod page_size unless both TASK+THREAD_SWAPPER are off.
93: * [1995/05/22 20:26:15 dwm]
94: *
95: * Revision 1.2.9.7 1995/05/14 18:19:59 dwm
96: * ri-osc CR1304 - merge (nmk19_latest - nmk19b1) diffs into mainline.
97: * fix use of constant in comment, breaks ancient grep script
98: * [1995/05/14 17:34:44 dwm]
99: *
100: * Revision 1.2.9.6 1995/04/07 19:05:17 barbou
101: * Kernel stack needs to be a multiple of page_size if TASK_SWAPPER is on,
102: * or we won't be able to unwire them when swapping out.
103: * [95/03/10 barbou]
104: *
105: * Revision 1.2.9.5 1995/03/15 17:19:33 bruel
106: * Increased Vm Min Kernel Loaded Address
107: * (Corollary kernels are link edited at 0xc4000000)
108: * [95/02/27 bernadat]
109: * [95/03/06 bruel]
110: *
111: * Revision 1.2.18.1 1995/05/02 21:57:51 travos
112: * Use large stacks for XKMACHKERNEL (same as NORMA_VM)
113: * [1995/05/02 21:56:52 travos]
114: *
115: * Revision 1.2.9.4 1994/09/23 02:37:53 ezf
116: * change marker to not FREE
117: * [1994/09/22 21:40:25 ezf]
118: *
119: * Revision 1.2.9.3 1994/08/31 15:55:53 dwm
120: * mk6 CR300 - INTSTACK_SIZE needs to be one whole page
121: * - bump collo range for larger MP configs
122: * [1994/08/31 15:51:37 dwm]
123: *
124: * Revision 1.2.9.2 1994/07/14 20:47:05 bolinger
125: * Put use of kernel feature header file under #ifdef MACH_KERNEL.
126: * [1994/07/14 20:46:45 bolinger]
127: *
128: * Revision 1.2.9.1 1994/07/14 16:01:49 bolinger
129: * If NORMA_VM, make kernel thread and interrupt stack size be 8KB.
130: * (NORMA-associated threads seem to need at least 5KB.)
131: * [1994/07/14 16:01:01 bolinger]
132: *
133: * Revision 1.2.6.5 1994/02/16 20:27:59 condict
134: * Export the range of kernel virtual addresses that are reserved
135: * for use by kernel-loaded servers.
136: * [1994/02/16 19:42:48 condict]
137: *
138: * Revision 1.2.6.4 1994/02/09 00:40:49 dwm
139: * Reduce kernel & interrupt stack size to 1/2 page, in the
140: * never-ending quest to reduce wired memory consumption.
141: * [1994/02/09 00:34:14 dwm]
142: *
143: * Revision 1.2.6.3 1993/12/10 19:37:00 dwm
144: * Re-hack of workaround: KERNEL_STACK_SIZE back to 1 page;
145: * lower THREAD_STATE_MAX to 64 ints instead.
146: * [1993/12/10 19:36:34 dwm]
147: *
148: * Revision 1.2.6.2 1993/10/26 21:54:01 dwm
149: * Coloc: Bump kernel stack size to 2 pages temporarily; mach/exc_user.c
150: * builds the exception msg on the stack, mig seemingly ignores -maxonstack,
151: * and I don't want to lower THREAD_STATE_MAX and have to rebuild the server
152: * and risk breaking some RISC variant for now. Yuck.
153: * (all this in preparation for RPC short-circuiting of exception path).
154: * [1993/10/26 20:55:16 dwm]
155: *
156: * Revision 1.2.2.3 1993/07/12 18:07:25 gm
157: * CR9339: Added trailing 'U' to VM_*_ADDRESS definitions.
158: * [1993/07/12 13:36:47 gm]
159: *
160: * Revision 1.2.2.2 1993/06/09 02:40:56 gm
161: * Added to OSF/1 R1.3 from NMK15.0.
162: * [1993/06/02 21:16:35 jeffc]
163: *
164: * Revision 1.2 1993/04/19 16:34:29 devrcs
165: * ansi C conformance changes
166: * [1993/02/02 18:56:25 david]
167: *
168: * Revision 1.1 1992/09/30 02:30:55 robert
169: * Initial revision
170: *
171: * $EndLog$
172: */
173: /* CMU_HIST */
174: /*
175: * Revision 2.5.2.1 92/03/03 16:21:49 jeffreyh
176: * Changes from TRUNK
177: * [92/02/26 12:01:03 jeffreyh]
178: *
179: * Revision 2.6 92/01/03 20:20:33 dbg
180: * Drop back to 1-page kernel stacks, since emulation_vector calls
181: * now pass data out-of-line.
182: * [92/01/03 dbg]
183: *
184: * Revision 2.5 91/11/19 08:08:35 rvb
185: * NORMA needs a larger stack so we do it for everyone,
186: * since stack space usage does not matter anymore.
187: *
188: * Revision 2.4 91/05/14 16:52:50 mrt
189: * Correcting copyright
190: *
191: * Revision 2.3 91/02/05 17:32:30 mrt
192: * Changed to new Mach copyright
193: * [91/02/01 17:10:30 mrt]
194: *
195: * Revision 2.2 90/05/03 15:48:20 dbg
196: * Move page-table definitions into i386/pmap.h.
197: * [90/04/05 dbg]
198: *
199: * Remove misleading comment about kernel stack size.
200: * [90/02/05 dbg]
201: *
202: * Revision 1.3 89/03/09 20:20:06 rpd
203: * More cleanup.
204: *
205: * Revision 1.2 89/02/26 13:01:13 gm0w
206: * Changes for cleanup.
207: *
208: * 31-Dec-88 Robert Baron (rvb) at Carnegie-Mellon University
209: * Derived from MACH2.0 vax release.
210: *
211: * 16-Jan-87 David Golub (dbg) at Carnegie-Mellon University
212: * Made vax_ptob return 'unsigned' instead of caddr_t.
213: *
214: */
215: /* CMU_ENDHIST */
216: /*
217: * Mach Operating System
218: * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
219: * All Rights Reserved.
220: *
221: * Permission to use, copy, modify and distribute this software and its
222: * documentation is hereby granted, provided that both the copyright
223: * notice and this permission notice appear in all copies of the
224: * software, derivative works or modified versions, and any portions
225: * thereof, and that both notices appear in supporting documentation.
226: *
227: * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
228: * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
229: * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
230: *
231: * Carnegie Mellon requests users of this software to return to
232: *
233: * Software Distribution Coordinator or [email protected]
234: * School of Computer Science
235: * Carnegie Mellon University
236: * Pittsburgh PA 15213-3890
237: *
238: * any improvements or extensions that they make and grant Carnegie Mellon
239: * the rights to redistribute these changes.
240: */
241:
242: /*
243: * Copyright (c) 1994 The University of Utah and
244: * the Computer Systems Laboratory at the University of Utah (CSL).
245: * All rights reserved.
246: *
247: * Permission to use, copy, modify and distribute this software is hereby
248: * granted provided that (1) source code retains these copyright, permission,
249: * and disclaimer notices, and (2) redistributions including binaries
250: * reproduce the notices in supporting documentation, and (3) all advertising
251: * materials mentioning features or use of this software display the following
252: * acknowledgement: ``This product includes software developed by the
253: * Computer Systems Laboratory at the University of Utah.''
254: *
255: * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
256: * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
257: * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
258: *
259: * CSL requests users of this software to return to [email protected] any
260: * improvements that they make and grant CSL redistribution rights.
261: *
262: */
263:
264: /*
265: * File: vm_param.h
266: * Author: Avadis Tevanian, Jr.
267: * Date: 1985
268: *
269: * I386 machine dependent virtual memory parameters.
270: * Most of the declarations are preceeded by I386_ (or i386_)
271: * which is OK because only I386 specific code will be using
272: * them.
273: */
274:
275: #ifndef _MACH_I386_VM_PARAM_H_
276: #define _MACH_I386_VM_PARAM_H_
277:
278: #define BYTE_SIZE 8 /* byte size in bits */
279:
280: #define I386_PGBYTES 4096 /* bytes per 80386 page */
281: #define I386_PGSHIFT 12 /* number of bits to shift for pages */
282:
283: /*
284: * Convert bytes to pages and convert pages to bytes.
285: * No rounding is used.
286: */
287:
288: #define i386_btop(x) (((unsigned)(x)) >> I386_PGSHIFT)
289: #define machine_btop(x) i386_btop(x)
290: #define i386_ptob(x) (((unsigned)(x)) << I386_PGSHIFT)
291:
292: /*
293: * Round off or truncate to the nearest page. These will work
294: * for either addresses or counts. (i.e. 1 byte rounds to 1 page
295: * bytes.
296: */
297:
298: #define i386_round_page(x) ((((unsigned)(x)) + I386_PGBYTES - 1) & \
299: ~(I386_PGBYTES-1))
300: #define i386_trunc_page(x) (((unsigned)(x)) & ~(I386_PGBYTES-1))
301:
302: #define VM_MIN_ADDRESS ((vm_offset_t) 0)
303: #define VM_MAX_ADDRESS ((vm_offset_t) 0xc0000000U)
304:
305: #define LINEAR_KERNEL_ADDRESS ((vm_offset_t) 0xc0000000)
306:
307: #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0x00000000U)
308: #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x3fffffffU)
309:
310: #define VM_MIN_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x0c000000U)
311: #define VM_MAX_KERNEL_LOADED_ADDRESS ((vm_offset_t) 0x1fffffffU)
312:
313: /* FIXME - always leave like this? */
314: #define INTSTACK_SIZE (I386_PGBYTES*4)
315: #define KERNEL_STACK_SIZE (I386_PGBYTES*4)
316:
317: #if 0 /* FIXME */
318:
319: #include <norma_vm.h>
320: #include <xkmachkernel.h>
321: #include <task_swapper.h>
322: #include <thread_swapper.h>
323:
324: #if defined(AT386)
325: #include <i386/cpuid.h>
326: #endif
327:
328: #if !NORMA_VM && !XKMACHKERNEL
329: #if !TASK_SWAPPER && !THREAD_SWAPPER
330: #define KERNEL_STACK_SIZE (I386_PGBYTES/2)
331: #else
332: /* stack needs to be a multiple of page size to get unwired when swapped */
333: #define KERNEL_STACK_SIZE (I386_PGBYTES)
334: #endif /* TASK || THREAD SWAPPER */
335: #define INTSTACK_SIZE (I386_PGBYTES) /* interrupt stack size */
336: #else /* NORMA_VM && !XKMACHKERNEL */
337: #define KERNEL_STACK_SIZE (I386_PGBYTES*2)
338: #define INTSTACK_SIZE (I386_PGBYTES*2) /* interrupt stack size */
339: #endif /* NORMA_VM && !XKMACHKERNEL */
340: #endif /* MACH_KERNEL */
341:
342: /*
343: * Conversion between 80386 pages and VM pages
344: */
345:
346: #define trunc_i386_to_vm(p) (atop(trunc_page(i386_ptob(p))))
347: #define round_i386_to_vm(p) (atop(round_page(i386_ptob(p))))
348: #define vm_to_i386(p) (i386_btop(ptoa(p)))
349:
350: /*
351: * Physical memory is mapped 1-1 with virtual memory starting
352: * at VM_MIN_KERNEL_ADDRESS.
353: */
354: #define phystokv(a) ((vm_offset_t)(a) + VM_MIN_KERNEL_ADDRESS)
355:
356: /*
357: * For 386 only, ensure that pages are installed in the
358: * kernel_pmap with VM_PROT_WRITE enabled. This avoids
359: * code in pmap_enter that disallows a read-only mapping
360: * in the kernel's pmap. (See ri-osc CR1387.)
361: *
362: * An entry in kernel_pmap is made only by the kernel or
363: * a collocated server -- by definition (;-)), the requester
364: * is trusted code. If it asked for read-only access,
365: * it won't attempt a write. We don't have to enforce the
366: * restriction. (Naturally, this assumes that any collocated
367: * server will _not_ depend on trapping write accesses to pages
368: * mapped read-only; this cannot be made to work in the current
369: * i386-inspired pmap model.)
370: */
371:
372: /*#if defined(AT386)
373:
374: #define PMAP_ENTER_386_CHECK \
375: if (cpuid_family == CPUID_FAMILY_386)
376:
377: #else -- FIXME? We're only running on Pentiums or better */
378:
379: #define PMAP_ENTER_386_CHECK
380:
381: /*#endif*/
382:
383: #define PMAP_ENTER(pmap, virtual_address, page, protection, wired) \
384: MACRO_BEGIN \
385: vm_prot_t __prot__ = \
386: (protection) & ~(page)->page_lock; \
387: \
388: PMAP_ENTER_386_CHECK \
389: if ((pmap) == kernel_pmap) \
390: __prot__ |= VM_PROT_WRITE; \
391: pmap_enter( \
392: (pmap), \
393: (virtual_address), \
394: (page)->phys_addr, \
395: __prot__, \
396: (wired) \
397: ); \
398: MACRO_END
399:
400: #endif /* _MACH_I386_VM_PARAM_H_ */
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.