memobj-r0drv-os2.cpp@ 28999

Last change on this file since 28999 was 28777, checked in by vboxsync, 15 years ago
iprt: added CachePolicy parameter to RTR0MemObjEnterPhys()
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 18.3 KB

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1	/* $Id: memobj-r0drv-os2.cpp 28777 2010-04-26 19:45:16Z 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, unsigned CachePolicy)
234	{
235	AssertReturn(CachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_IMPLEMENTED);
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	*ppMem = &pMemOs2->Core;
246	return VINF_SUCCESS;
247	}
248
249
250	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
251	{
252	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
253
254	/* create the object. */
255	const ULONG cPages = cb >> PAGE_SHIFT;
256	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
257	if (!pMemOs2)
258	return VERR_NO_MEMORY;
259
260	/* lock it. */
261	ULONG cPagesRet = cPages;
262	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
263	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
264	if (!rc)
265	{
266	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
267	Assert(cb == pMemOs2->Core.cb);
268	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
269	pMemOs2->Core.u.Lock.R0Process = R0Process;
270	*ppMem = &pMemOs2->Core;
271	return VINF_SUCCESS;
272	}
273	rtR0MemObjDelete(&pMemOs2->Core);
274	return RTErrConvertFromOS2(rc);
275	}
276
277
278	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
279	{
280	/* create the object. */
281	const ULONG cPages = cb >> PAGE_SHIFT;
282	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, pv, cb);
283	if (!pMemOs2)
284	return VERR_NO_MEMORY;
285
286	/* lock it. */
287	ULONG cPagesRet = cPages;
288	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
289	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
290	if (!rc)
291	{
292	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
293	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
294	*ppMem = &pMemOs2->Core;
295	return VINF_SUCCESS;
296	}
297	rtR0MemObjDelete(&pMemOs2->Core);
298	return RTErrConvertFromOS2(rc);
299	}
300
301
302	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
303	{
304	return VERR_NOT_IMPLEMENTED;
305	}
306
307
308	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
309	{
310	return VERR_NOT_IMPLEMENTED;
311	}
312
313
314	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
315	unsigned fProt, size_t offSub, size_t cbSub)
316	{
317	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
318	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
319
320	/*
321	* Check that the specified alignment is supported.
322	*/
323	if (uAlignment > PAGE_SIZE)
324	return VERR_NOT_SUPPORTED;
325
326
327	/** @todo finish the implementation. */
328
329	int rc;
330	void *pvR0 = NULL;
331	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
332	switch (pMemToMapOs2->Core.enmType)
333	{
334	/*
335	* These has kernel mappings.
336	*/
337	case RTR0MEMOBJTYPE_PAGE:
338	case RTR0MEMOBJTYPE_LOW:
339	case RTR0MEMOBJTYPE_CONT:
340	pvR0 = pMemToMapOs2->Core.pv;
341	break;
342
343	case RTR0MEMOBJTYPE_PHYS:
344	pvR0 = pMemToMapOs2->Core.pv;
345	if (!pvR0)
346	{
347	/* no ring-0 mapping, so allocate a mapping in the process. */
348	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
349	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
350	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
351	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
352	if (rc)
353	return RTErrConvertFromOS2(rc);
354	pMemToMapOs2->Core.pv = pvR0;
355	}
356	break;
357
358	case RTR0MEMOBJTYPE_PHYS_NC:
359	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
360	return VERR_NOT_IMPLEMENTED;
361	break;
362
363	case RTR0MEMOBJTYPE_LOCK:
364	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
365	return VERR_NOT_SUPPORTED; /** @todo implement this... */
366	pvR0 = pMemToMapOs2->Core.pv;
367	break;
368
369	case RTR0MEMOBJTYPE_RES_VIRT:
370	case RTR0MEMOBJTYPE_MAPPING:
371	default:
372	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
373	return VERR_INTERNAL_ERROR;
374	}
375
376	/*
377	* Create a dummy mapping object for it.
378	*
379	* All mappings are read/write/execute in OS/2 and there isn't
380	* any cache options, so sharing is ok. And the main memory object
381	* isn't actually freed until all the mappings have been freed up
382	* (reference counting).
383	*/
384	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
385	if (pMemOs2)
386	{
387	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
388	*ppMem = &pMemOs2->Core;
389	return VINF_SUCCESS;
390	}
391	return VERR_NO_MEMORY;
392	}
393
394
395	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
396	{
397	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
398	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
399	if (uAlignment > PAGE_SIZE)
400	return VERR_NOT_SUPPORTED;
401
402	int rc;
403	void *pvR0;
404	void *pvR3 = NULL;
405	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
406	switch (pMemToMapOs2->Core.enmType)
407	{
408	/*
409	* These has kernel mappings.
410	*/
411	case RTR0MEMOBJTYPE_PAGE:
412	case RTR0MEMOBJTYPE_LOW:
413	case RTR0MEMOBJTYPE_CONT:
414	pvR0 = pMemToMapOs2->Core.pv;
415	break;
416
417	case RTR0MEMOBJTYPE_PHYS:
418	pvR0 = pMemToMapOs2->Core.pv;
419	#if 0/* this is wrong. */
420	if (!pvR0)
421	{
422	/* no ring-0 mapping, so allocate a mapping in the process. */
423	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
424	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
425	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
426	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
427	if (rc)
428	return RTErrConvertFromOS2(rc);
429	}
430	break;
431	#endif
432	return VERR_NOT_SUPPORTED;
433
434	case RTR0MEMOBJTYPE_PHYS_NC:
435	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
436	return VERR_NOT_IMPLEMENTED;
437	break;
438
439	case RTR0MEMOBJTYPE_LOCK:
440	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
441	return VERR_NOT_SUPPORTED; /** @todo implement this... */
442	pvR0 = pMemToMapOs2->Core.pv;
443	break;
444
445	case RTR0MEMOBJTYPE_RES_VIRT:
446	case RTR0MEMOBJTYPE_MAPPING:
447	default:
448	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
449	return VERR_INTERNAL_ERROR;
450	}
451
452	/*
453	* Map the ring-0 memory into the current process.
454	*/
455	if (!pvR3)
456	{
457	Assert(pvR0);
458	ULONG flFlags = 0;
459	if (uAlignment == PAGE_SIZE)
460	flFlags \|= VMDHGP_4MB;
461	if (fProt & RTMEM_PROT_WRITE)
462	flFlags \|= VMDHGP_WRITE;
463	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
464	if (rc)
465	return RTErrConvertFromOS2(rc);
466	}
467	Assert(pvR3);
468
469	/*
470	* Create a mapping object for it.
471	*/
472	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR3, pMemToMapOs2->Core.cb);
473	if (pMemOs2)
474	{
475	Assert(pMemOs2->Core.pv == pvR3);
476	pMemOs2->Core.u.Mapping.R0Process = R0Process;
477	*ppMem = &pMemOs2->Core;
478	return VINF_SUCCESS;
479	}
480	KernVMFree(pvR3);
481	return VERR_NO_MEMORY;
482	}
483
484
485	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
486	{
487	NOREF(pMem);
488	NOREF(offSub);
489	NOREF(cbSub);
490	NOREF(fProt);
491	return VERR_NOT_SUPPORTED;
492	}
493
494
495	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
496	{
497	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
498
499	switch (pMemOs2->Core.enmType)
500	{
501	case RTR0MEMOBJTYPE_PAGE:
502	case RTR0MEMOBJTYPE_LOW:
503	case RTR0MEMOBJTYPE_LOCK:
504	case RTR0MEMOBJTYPE_PHYS_NC:
505	return pMemOs2->aPages[iPage].Addr;
506
507	case RTR0MEMOBJTYPE_CONT:
508	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
509
510	case RTR0MEMOBJTYPE_PHYS:
511	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
512
513	case RTR0MEMOBJTYPE_RES_VIRT:
514	case RTR0MEMOBJTYPE_MAPPING:
515	default:
516	return NIL_RTHCPHYS;
517	}
518	}
519
520
521	/**
522	* Expands the page list so we can index pages directly.
523	*
524	* @param paPages The page list array to fix.
525	* @param cPages The number of pages that's supposed to go into the list.
526	* @param cPagesRet The actual number of pages in the list.
527	*/
528	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
529	{
530	Assert(cPages >= cPagesRet);
531	if (cPages != cPagesRet)
532	{
533	ULONG iIn = cPagesRet;
534	ULONG iOut = cPages;
535	do
536	{
537	iIn--;
538	iOut--;
539	Assert(iIn <= iOut);
540
541	KernPageList_t Page = paPages[iIn];
542	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
543	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
544
545	if (Page.Size > PAGE_SIZE)
546	{
547	do
548	{
549	Page.Size -= PAGE_SIZE;
550	paPages[iOut].Addr = Page.Addr + Page.Size;
551	paPages[iOut].Size = PAGE_SIZE;
552	iOut--;
553	} while (Page.Size > PAGE_SIZE);
554	}
555
556	paPages[iOut].Addr = Page.Addr;
557	paPages[iOut].Size = PAGE_SIZE;
558	} while ( iIn != iOut
559	&& iIn > 0);
560	}
561	}
562

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source: vbox/trunk/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp@ 28999

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