memobj-r0drv-os2.cpp@ 27737

最後變更在這個檔案從27737是 26847,由 vboxsync 提交於 15 年前
Don't pass uAlignment=0 to rtR0MemObjNativeAllocPhys, resolve the alias like is done for the other APIs.
屬性 svn:eol-style 設為 `native` 屬性 svn:keywords 設為 `Id`
檔案大小: 18.2 KB

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1	/* $Id: memobj-r0drv-os2.cpp 26847 2010-02-26 13:19:14Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, OS/2.
4	*/
5
6	/*
7	* Copyright (c) 2007 knut st. osmundsen <[email protected]>
8	*
9	* Permission is hereby granted, free of charge, to any person
10	* obtaining a copy of this software and associated documentation
11	* files (the "Software"), to deal in the Software without
12	* restriction, including without limitation the rights to use,
13	* copy, modify, merge, publish, distribute, sublicense, and/or sell
14	* copies of the Software, and to permit persons to whom the
15	* Software is furnished to do so, subject to the following
16	* conditions:
17	*
18	* The above copyright notice and this permission notice shall be
19	* included in all copies or substantial portions of the Software.
20	*
21	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28	* OTHER DEALINGS IN THE SOFTWARE.
29	*/
30
31
32	/*******************************************************************************
33	* Header Files *
34	*******************************************************************************/
35	#include "the-os2-kernel.h"
36
37	#include <iprt/memobj.h>
38	#include <iprt/mem.h>
39	#include <iprt/err.h>
40	#include <iprt/assert.h>
41	#include <iprt/log.h>
42	#include <iprt/param.h>
43	#include <iprt/process.h>
44	#include "internal/memobj.h"
45
46
47	/*******************************************************************************
48	* Structures and Typedefs *
49	*******************************************************************************/
50	/**
51	* The OS/2 version of the memory object structure.
52	*/
53	typedef struct RTR0MEMOBJDARWIN
54	{
55	/** The core structure. */
56	RTR0MEMOBJINTERNAL Core;
57	/** Lock for the ring-3 / ring-0 pinned objectes.
58	* This member might not be allocated for some object types. */
59	KernVMLock_t Lock;
60	/** Array of physical pages.
61	* This array can be 0 in length for some object types. */
62	KernPageList_t aPages[1];
63	} RTR0MEMOBJOS2, *PRTR0MEMOBJOS2;
64
65
66	/*******************************************************************************
67	* Internal Functions *
68	*******************************************************************************/
69	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet);
70
71
72	int rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
73	{
74	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
75	int rc;
76
77	switch (pMemOs2->Core.enmType)
78	{
79	case RTR0MEMOBJTYPE_PHYS_NC:
80	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
81	return VERR_INTERNAL_ERROR;
82	break;
83
84	case RTR0MEMOBJTYPE_PHYS:
85	if (!pMemOs2->Core.pv)
86	break;
87
88	case RTR0MEMOBJTYPE_MAPPING:
89	if (pMemOs2->Core.u.Mapping.R0Process == NIL_RTR0PROCESS)
90	break;
91
92	/* fall thru */
93	case RTR0MEMOBJTYPE_PAGE:
94	case RTR0MEMOBJTYPE_LOW:
95	case RTR0MEMOBJTYPE_CONT:
96	rc = KernVMFree(pMemOs2->Core.pv);
97	AssertMsg(!rc, ("rc=%d type=%d pv=%p cb=%#zx\n", rc, pMemOs2->Core.enmType, pMemOs2->Core.pv, pMemOs2->Core.cb));
98	break;
99
100	case RTR0MEMOBJTYPE_LOCK:
101	rc = KernVMUnlock(&pMemOs2->Lock);
102	AssertMsg(!rc, ("rc=%d\n", rc));
103	break;
104
105	case RTR0MEMOBJTYPE_RES_VIRT:
106	default:
107	AssertMsgFailed(("enmType=%d\n", pMemOs2->Core.enmType));
108	return VERR_INTERNAL_ERROR;
109	}
110
111	return VINF_SUCCESS;
112	}
113
114
115	int rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
116	{
117	NOREF(fExecutable);
118
119	/* create the object. */
120	const ULONG cPages = cb >> PAGE_SHIFT;
121	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_PAGE, NULL, cb);
122	if (!pMemOs2)
123	return VERR_NO_MEMORY;
124
125	/* do the allocation. */
126	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
127	if (!rc)
128	{
129	ULONG cPagesRet = cPages;
130	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
131	if (!rc)
132	{
133	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
134	*ppMem = &pMemOs2->Core;
135	return VINF_SUCCESS;
136	}
137	KernVMFree(pMemOs2->Core.pv);
138	}
139	rtR0MemObjDelete(&pMemOs2->Core);
140	return RTErrConvertFromOS2(rc);
141	}
142
143
144	int rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
145	{
146	NOREF(fExecutable);
147
148	/* create the object. */
149	const ULONG cPages = cb >> PAGE_SHIFT;
150	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOW, NULL, cb);
151	if (!pMemOs2)
152	return VERR_NO_MEMORY;
153
154	/* do the allocation. */
155	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
156	if (!rc)
157	{
158	ULONG cPagesRet = cPages;
159	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
160	if (!rc)
161	{
162	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
163	*ppMem = &pMemOs2->Core;
164	return VINF_SUCCESS;
165	}
166	KernVMFree(pMemOs2->Core.pv);
167	}
168	rtR0MemObjDelete(&pMemOs2->Core);
169	return RTErrConvertFromOS2(rc);
170	}
171
172
173	int rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable)
174	{
175	NOREF(fExecutable);
176
177	/* create the object. */
178	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_CONT, NULL, cb);
179	if (!pMemOs2)
180	return VERR_NO_MEMORY;
181
182	/* do the allocation. */
183	ULONG ulPhys = ~0UL;
184	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG, &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
185	if (!rc)
186	{
187	Assert(ulPhys != ~0UL);
188	pMemOs2->Core.u.Cont.Phys = ulPhys;
189	*ppMem = &pMemOs2->Core;
190	return VINF_SUCCESS;
191	}
192	rtR0MemObjDelete(&pMemOs2->Core);
193	return RTErrConvertFromOS2(rc);
194	}
195
196
197	int rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
198	{
199	AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_IMPLEMENTED);
200
201	/** @todo alignment */
202	if (uAlignment != PAGE_SIZE)
203	return VERR_NOT_SUPPORTED;
204
205	/* create the object. */
206	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
207	if (!pMemOs2)
208	return VERR_NO_MEMORY;
209
210	/* do the allocation. */
211	ULONG ulPhys = ~0UL;
212	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG \| (PhysHighest < _4G ? VMDHA_16M : 0), &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
213	if (!rc)
214	{
215	Assert(ulPhys != ~0UL);
216	pMemOs2->Core.u.Phys.fAllocated = true;
217	pMemOs2->Core.u.Phys.PhysBase = ulPhys;
218	*ppMem = &pMemOs2->Core;
219	return VINF_SUCCESS;
220	}
221	rtR0MemObjDelete(&pMemOs2->Core);
222	return RTErrConvertFromOS2(rc);
223	}
224
225
226	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
227	{
228	/** @todo rtR0MemObjNativeAllocPhys / darwin. */
229	return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest, PAGE_SIZE);
230	}
231
232
233	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
234	{
235	/* create the object. */
236	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
237	if (!pMemOs2)
238	return VERR_NO_MEMORY;
239
240	/* there is no allocation here, right? it needs to be mapped somewhere first. */
241	pMemOs2->Core.u.Phys.fAllocated = false;
242	pMemOs2->Core.u.Phys.PhysBase = Phys;
243	*ppMem = &pMemOs2->Core;
244	return VINF_SUCCESS;
245	}
246
247
248	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
249	{
250	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
251
252	/* create the object. */
253	const ULONG cPages = cb >> PAGE_SHIFT;
254	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
255	if (!pMemOs2)
256	return VERR_NO_MEMORY;
257
258	/* lock it. */
259	ULONG cPagesRet = cPages;
260	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
261	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
262	if (!rc)
263	{
264	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
265	Assert(cb == pMemOs2->Core.cb);
266	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
267	pMemOs2->Core.u.Lock.R0Process = R0Process;
268	*ppMem = &pMemOs2->Core;
269	return VINF_SUCCESS;
270	}
271	rtR0MemObjDelete(&pMemOs2->Core);
272	return RTErrConvertFromOS2(rc);
273	}
274
275
276	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
277	{
278	/* create the object. */
279	const ULONG cPages = cb >> PAGE_SHIFT;
280	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, pv, cb);
281	if (!pMemOs2)
282	return VERR_NO_MEMORY;
283
284	/* lock it. */
285	ULONG cPagesRet = cPages;
286	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
287	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
288	if (!rc)
289	{
290	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
291	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
292	*ppMem = &pMemOs2->Core;
293	return VINF_SUCCESS;
294	}
295	rtR0MemObjDelete(&pMemOs2->Core);
296	return RTErrConvertFromOS2(rc);
297	}
298
299
300	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
301	{
302	return VERR_NOT_IMPLEMENTED;
303	}
304
305
306	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
307	{
308	return VERR_NOT_IMPLEMENTED;
309	}
310
311
312	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
313	unsigned fProt, size_t offSub, size_t cbSub)
314	{
315	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
316	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
317
318	/*
319	* Check that the specified alignment is supported.
320	*/
321	if (uAlignment > PAGE_SIZE)
322	return VERR_NOT_SUPPORTED;
323
324
325	/** @todo finish the implementation. */
326
327	int rc;
328	void *pvR0 = NULL;
329	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
330	switch (pMemToMapOs2->Core.enmType)
331	{
332	/*
333	* These has kernel mappings.
334	*/
335	case RTR0MEMOBJTYPE_PAGE:
336	case RTR0MEMOBJTYPE_LOW:
337	case RTR0MEMOBJTYPE_CONT:
338	pvR0 = pMemToMapOs2->Core.pv;
339	break;
340
341	case RTR0MEMOBJTYPE_PHYS:
342	pvR0 = pMemToMapOs2->Core.pv;
343	if (!pvR0)
344	{
345	/* no ring-0 mapping, so allocate a mapping in the process. */
346	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
347	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
348	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
349	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
350	if (rc)
351	return RTErrConvertFromOS2(rc);
352	pMemToMapOs2->Core.pv = pvR0;
353	}
354	break;
355
356	case RTR0MEMOBJTYPE_PHYS_NC:
357	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
358	return VERR_NOT_IMPLEMENTED;
359	break;
360
361	case RTR0MEMOBJTYPE_LOCK:
362	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
363	return VERR_NOT_SUPPORTED; /** @todo implement this... */
364	pvR0 = pMemToMapOs2->Core.pv;
365	break;
366
367	case RTR0MEMOBJTYPE_RES_VIRT:
368	case RTR0MEMOBJTYPE_MAPPING:
369	default:
370	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
371	return VERR_INTERNAL_ERROR;
372	}
373
374	/*
375	* Create a dummy mapping object for it.
376	*
377	* All mappings are read/write/execute in OS/2 and there isn't
378	* any cache options, so sharing is ok. And the main memory object
379	* isn't actually freed until all the mappings have been freed up
380	* (reference counting).
381	*/
382	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
383	if (pMemOs2)
384	{
385	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
386	*ppMem = &pMemOs2->Core;
387	return VINF_SUCCESS;
388	}
389	return VERR_NO_MEMORY;
390	}
391
392
393	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
394	{
395	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
396	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
397	if (uAlignment > PAGE_SIZE)
398	return VERR_NOT_SUPPORTED;
399
400	int rc;
401	void *pvR0;
402	void *pvR3 = NULL;
403	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
404	switch (pMemToMapOs2->Core.enmType)
405	{
406	/*
407	* These has kernel mappings.
408	*/
409	case RTR0MEMOBJTYPE_PAGE:
410	case RTR0MEMOBJTYPE_LOW:
411	case RTR0MEMOBJTYPE_CONT:
412	pvR0 = pMemToMapOs2->Core.pv;
413	break;
414
415	case RTR0MEMOBJTYPE_PHYS:
416	pvR0 = pMemToMapOs2->Core.pv;
417	#if 0/* this is wrong. */
418	if (!pvR0)
419	{
420	/* no ring-0 mapping, so allocate a mapping in the process. */
421	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
422	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
423	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
424	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
425	if (rc)
426	return RTErrConvertFromOS2(rc);
427	}
428	break;
429	#endif
430	return VERR_NOT_SUPPORTED;
431
432	case RTR0MEMOBJTYPE_PHYS_NC:
433	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
434	return VERR_NOT_IMPLEMENTED;
435	break;
436
437	case RTR0MEMOBJTYPE_LOCK:
438	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
439	return VERR_NOT_SUPPORTED; /** @todo implement this... */
440	pvR0 = pMemToMapOs2->Core.pv;
441	break;
442
443	case RTR0MEMOBJTYPE_RES_VIRT:
444	case RTR0MEMOBJTYPE_MAPPING:
445	default:
446	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
447	return VERR_INTERNAL_ERROR;
448	}
449
450	/*
451	* Map the ring-0 memory into the current process.
452	*/
453	if (!pvR3)
454	{
455	Assert(pvR0);
456	ULONG flFlags = 0;
457	if (uAlignment == PAGE_SIZE)
458	flFlags \|= VMDHGP_4MB;
459	if (fProt & RTMEM_PROT_WRITE)
460	flFlags \|= VMDHGP_WRITE;
461	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
462	if (rc)
463	return RTErrConvertFromOS2(rc);
464	}
465	Assert(pvR3);
466
467	/*
468	* Create a mapping object for it.
469	*/
470	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR3, pMemToMapOs2->Core.cb);
471	if (pMemOs2)
472	{
473	Assert(pMemOs2->Core.pv == pvR3);
474	pMemOs2->Core.u.Mapping.R0Process = R0Process;
475	*ppMem = &pMemOs2->Core;
476	return VINF_SUCCESS;
477	}
478	KernVMFree(pvR3);
479	return VERR_NO_MEMORY;
480	}
481
482
483	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
484	{
485	NOREF(pMem);
486	NOREF(offSub);
487	NOREF(cbSub);
488	NOREF(fProt);
489	return VERR_NOT_SUPPORTED;
490	}
491
492
493	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
494	{
495	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
496
497	switch (pMemOs2->Core.enmType)
498	{
499	case RTR0MEMOBJTYPE_PAGE:
500	case RTR0MEMOBJTYPE_LOW:
501	case RTR0MEMOBJTYPE_LOCK:
502	case RTR0MEMOBJTYPE_PHYS_NC:
503	return pMemOs2->aPages[iPage].Addr;
504
505	case RTR0MEMOBJTYPE_CONT:
506	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
507
508	case RTR0MEMOBJTYPE_PHYS:
509	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
510
511	case RTR0MEMOBJTYPE_RES_VIRT:
512	case RTR0MEMOBJTYPE_MAPPING:
513	default:
514	return NIL_RTHCPHYS;
515	}
516	}
517
518
519	/**
520	* Expands the page list so we can index pages directly.
521	*
522	* @param paPages The page list array to fix.
523	* @param cPages The number of pages that's supposed to go into the list.
524	* @param cPagesRet The actual number of pages in the list.
525	*/
526	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
527	{
528	Assert(cPages >= cPagesRet);
529	if (cPages != cPagesRet)
530	{
531	ULONG iIn = cPagesRet;
532	ULONG iOut = cPages;
533	do
534	{
535	iIn--;
536	iOut--;
537	Assert(iIn <= iOut);
538
539	KernPageList_t Page = paPages[iIn];
540	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
541	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
542
543	if (Page.Size > PAGE_SIZE)
544	{
545	do
546	{
547	Page.Size -= PAGE_SIZE;
548	paPages[iOut].Addr = Page.Addr + Page.Size;
549	paPages[iOut].Size = PAGE_SIZE;
550	iOut--;
551	} while (Page.Size > PAGE_SIZE);
552	}
553
554	paPages[iOut].Addr = Page.Addr;
555	paPages[iOut].Size = PAGE_SIZE;
556	} while ( iIn != iOut
557	&& iIn > 0);
558	}
559	}
560

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