memobj-r0drv-os2.cpp@ 38888

最後變更在這個檔案從38888是 36555,由 vboxsync 提交於 14 年前
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1	/* $Id: memobj-r0drv-os2.cpp 36555 2011-04-05 12:34:09Z 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	DECLHIDDEN(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	DECLHIDDEN(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	DECLHIDDEN(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	DECLHIDDEN(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	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment)
198	{
199	AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_SUPPORTED);
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	DECLHIDDEN(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	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy)
234	{
235	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
236
237	/* create the object. */
238	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
239	if (!pMemOs2)
240	return VERR_NO_MEMORY;
241
242	/* there is no allocation here, right? it needs to be mapped somewhere first. */
243	pMemOs2->Core.u.Phys.fAllocated = false;
244	pMemOs2->Core.u.Phys.PhysBase = Phys;
245	pMemOs2->Core.u.Phys.uCachePolicy = uCachePolicy;
246	*ppMem = &pMemOs2->Core;
247	return VINF_SUCCESS;
248	}
249
250
251	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess,
252	RTR0PROCESS R0Process)
253	{
254	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
255
256	/* create the object. */
257	const ULONG cPages = cb >> PAGE_SHIFT;
258	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
259	if (!pMemOs2)
260	return VERR_NO_MEMORY;
261
262	/* lock it. */
263	ULONG cPagesRet = cPages;
264	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
265	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
266	if (!rc)
267	{
268	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
269	Assert(cb == pMemOs2->Core.cb);
270	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
271	pMemOs2->Core.u.Lock.R0Process = R0Process;
272	*ppMem = &pMemOs2->Core;
273	return VINF_SUCCESS;
274	}
275	rtR0MemObjDelete(&pMemOs2->Core);
276	return RTErrConvertFromOS2(rc);
277	}
278
279
280	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
281	{
282	/* create the object. */
283	const ULONG cPages = cb >> PAGE_SHIFT;
284	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, pv, cb);
285	if (!pMemOs2)
286	return VERR_NO_MEMORY;
287
288	/* lock it. */
289	ULONG cPagesRet = cPages;
290	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
291	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
292	if (!rc)
293	{
294	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
295	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
296	*ppMem = &pMemOs2->Core;
297	return VINF_SUCCESS;
298	}
299	rtR0MemObjDelete(&pMemOs2->Core);
300	return RTErrConvertFromOS2(rc);
301	}
302
303
304	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
305	{
306	return VERR_NOT_SUPPORTED;
307	}
308
309
310	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment,
311	RTR0PROCESS R0Process)
312	{
313	return VERR_NOT_SUPPORTED;
314	}
315
316
317	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
318	unsigned fProt, size_t offSub, size_t cbSub)
319	{
320	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
321	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
322
323	/*
324	* Check that the specified alignment is supported.
325	*/
326	if (uAlignment > PAGE_SIZE)
327	return VERR_NOT_SUPPORTED;
328
329
330	/** @todo finish the implementation. */
331
332	int rc;
333	void *pvR0 = NULL;
334	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
335	switch (pMemToMapOs2->Core.enmType)
336	{
337	/*
338	* These has kernel mappings.
339	*/
340	case RTR0MEMOBJTYPE_PAGE:
341	case RTR0MEMOBJTYPE_LOW:
342	case RTR0MEMOBJTYPE_CONT:
343	pvR0 = pMemToMapOs2->Core.pv;
344	break;
345
346	case RTR0MEMOBJTYPE_PHYS:
347	pvR0 = pMemToMapOs2->Core.pv;
348	if (!pvR0)
349	{
350	/* no ring-0 mapping, so allocate a mapping in the process. */
351	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
352	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
353	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
354	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
355	if (rc)
356	return RTErrConvertFromOS2(rc);
357	pMemToMapOs2->Core.pv = pvR0;
358	}
359	break;
360
361	case RTR0MEMOBJTYPE_PHYS_NC:
362	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
363	return VERR_INTERNAL_ERROR_3;
364	break;
365
366	case RTR0MEMOBJTYPE_LOCK:
367	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
368	return VERR_NOT_SUPPORTED; /** @todo implement this... */
369	pvR0 = pMemToMapOs2->Core.pv;
370	break;
371
372	case RTR0MEMOBJTYPE_RES_VIRT:
373	case RTR0MEMOBJTYPE_MAPPING:
374	default:
375	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
376	return VERR_INTERNAL_ERROR;
377	}
378
379	/*
380	* Create a dummy mapping object for it.
381	*
382	* All mappings are read/write/execute in OS/2 and there isn't
383	* any cache options, so sharing is ok. And the main memory object
384	* isn't actually freed until all the mappings have been freed up
385	* (reference counting).
386	*/
387	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
388	if (pMemOs2)
389	{
390	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
391	*ppMem = &pMemOs2->Core;
392	return VINF_SUCCESS;
393	}
394	return VERR_NO_MEMORY;
395	}
396
397
398	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
399	{
400	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
401	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
402	if (uAlignment > PAGE_SIZE)
403	return VERR_NOT_SUPPORTED;
404
405	int rc;
406	void *pvR0;
407	void *pvR3 = NULL;
408	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
409	switch (pMemToMapOs2->Core.enmType)
410	{
411	/*
412	* These has kernel mappings.
413	*/
414	case RTR0MEMOBJTYPE_PAGE:
415	case RTR0MEMOBJTYPE_LOW:
416	case RTR0MEMOBJTYPE_CONT:
417	pvR0 = pMemToMapOs2->Core.pv;
418	break;
419
420	case RTR0MEMOBJTYPE_PHYS:
421	pvR0 = pMemToMapOs2->Core.pv;
422	#if 0/* this is wrong. */
423	if (!pvR0)
424	{
425	/* no ring-0 mapping, so allocate a mapping in the process. */
426	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
427	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
428	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
429	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
430	if (rc)
431	return RTErrConvertFromOS2(rc);
432	}
433	break;
434	#endif
435	return VERR_NOT_SUPPORTED;
436
437	case RTR0MEMOBJTYPE_PHYS_NC:
438	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
439	return VERR_INTERNAL_ERROR_5;
440	break;
441
442	case RTR0MEMOBJTYPE_LOCK:
443	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
444	return VERR_NOT_SUPPORTED; /** @todo implement this... */
445	pvR0 = pMemToMapOs2->Core.pv;
446	break;
447
448	case RTR0MEMOBJTYPE_RES_VIRT:
449	case RTR0MEMOBJTYPE_MAPPING:
450	default:
451	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
452	return VERR_INTERNAL_ERROR;
453	}
454
455	/*
456	* Map the ring-0 memory into the current process.
457	*/
458	if (!pvR3)
459	{
460	Assert(pvR0);
461	ULONG flFlags = 0;
462	if (uAlignment == PAGE_SIZE)
463	flFlags \|= VMDHGP_4MB;
464	if (fProt & RTMEM_PROT_WRITE)
465	flFlags \|= VMDHGP_WRITE;
466	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
467	if (rc)
468	return RTErrConvertFromOS2(rc);
469	}
470	Assert(pvR3);
471
472	/*
473	* Create a mapping object for it.
474	*/
475	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR3, pMemToMapOs2->Core.cb);
476	if (pMemOs2)
477	{
478	Assert(pMemOs2->Core.pv == pvR3);
479	pMemOs2->Core.u.Mapping.R0Process = R0Process;
480	*ppMem = &pMemOs2->Core;
481	return VINF_SUCCESS;
482	}
483	KernVMFree(pvR3);
484	return VERR_NO_MEMORY;
485	}
486
487
488	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
489	{
490	NOREF(pMem);
491	NOREF(offSub);
492	NOREF(cbSub);
493	NOREF(fProt);
494	return VERR_NOT_SUPPORTED;
495	}
496
497
498	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
499	{
500	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
501
502	switch (pMemOs2->Core.enmType)
503	{
504	case RTR0MEMOBJTYPE_PAGE:
505	case RTR0MEMOBJTYPE_LOW:
506	case RTR0MEMOBJTYPE_LOCK:
507	case RTR0MEMOBJTYPE_PHYS_NC:
508	return pMemOs2->aPages[iPage].Addr;
509
510	case RTR0MEMOBJTYPE_CONT:
511	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
512
513	case RTR0MEMOBJTYPE_PHYS:
514	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
515
516	case RTR0MEMOBJTYPE_RES_VIRT:
517	case RTR0MEMOBJTYPE_MAPPING:
518	default:
519	return NIL_RTHCPHYS;
520	}
521	}
522
523
524	/**
525	* Expands the page list so we can index pages directly.
526	*
527	* @param paPages The page list array to fix.
528	* @param cPages The number of pages that's supposed to go into the list.
529	* @param cPagesRet The actual number of pages in the list.
530	*/
531	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
532	{
533	Assert(cPages >= cPagesRet);
534	if (cPages != cPagesRet)
535	{
536	ULONG iIn = cPagesRet;
537	ULONG iOut = cPages;
538	do
539	{
540	iIn--;
541	iOut--;
542	Assert(iIn <= iOut);
543
544	KernPageList_t Page = paPages[iIn];
545	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
546	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
547
548	if (Page.Size > PAGE_SIZE)
549	{
550	do
551	{
552	Page.Size -= PAGE_SIZE;
553	paPages[iOut].Addr = Page.Addr + Page.Size;
554	paPages[iOut].Size = PAGE_SIZE;
555	iOut--;
556	} while (Page.Size > PAGE_SIZE);
557	}
558
559	paPages[iOut].Addr = Page.Addr;
560	paPages[iOut].Size = PAGE_SIZE;
561	} while ( iIn != iOut
562	&& iIn > 0);
563	}
564	}
565

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