memobj-r0drv-os2.cpp@ 26430

Last change on this file since 26430 was 26430, checked in by vboxsync, 15 years ago
Introducing RTR0MemObjAllocPhysEx
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 18.2 KB

Line
1	/* $Id: memobj-r0drv-os2.cpp 26430 2010-02-11 14:23:01Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, OS/2.
4	*/
5
6	/*
7	* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
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 */
202	if ( uAlignment != 0
203	&& uAlignment != PAGE_SIZE)
204	return VERR_NOT_SUPPORTED;
205
206	/* create the object. */
207	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
208	if (!pMemOs2)
209	return VERR_NO_MEMORY;
210
211	/* do the allocation. */
212	ULONG ulPhys = ~0UL;
213	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG \| (PhysHighest < _4G ? VMDHA_16M : 0), &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
214	if (!rc)
215	{
216	Assert(ulPhys != ~0UL);
217	pMemOs2->Core.u.Phys.fAllocated = true;
218	pMemOs2->Core.u.Phys.PhysBase = ulPhys;
219	*ppMem = &pMemOs2->Core;
220	return VINF_SUCCESS;
221	}
222	rtR0MemObjDelete(&pMemOs2->Core);
223	return RTErrConvertFromOS2(rc);
224	}
225
226
227	int rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest)
228	{
229	/** @todo rtR0MemObjNativeAllocPhys / darwin. */
230	return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest);
231	}
232
233
234	int rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb)
235	{
236	/* create the object. */
237	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS, NULL, cb);
238	if (!pMemOs2)
239	return VERR_NO_MEMORY;
240
241	/* there is no allocation here, right? it needs to be mapped somewhere first. */
242	pMemOs2->Core.u.Phys.fAllocated = false;
243	pMemOs2->Core.u.Phys.PhysBase = Phys;
244	*ppMem = &pMemOs2->Core;
245	return VINF_SUCCESS;
246	}
247
248
249	int rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess, RTR0PROCESS R0Process)
250	{
251	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
252
253	/* create the object. */
254	const ULONG cPages = cb >> PAGE_SHIFT;
255	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb);
256	if (!pMemOs2)
257	return VERR_NO_MEMORY;
258
259	/* lock it. */
260	ULONG cPagesRet = cPages;
261	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
262	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
263	if (!rc)
264	{
265	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
266	Assert(cb == pMemOs2->Core.cb);
267	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
268	pMemOs2->Core.u.Lock.R0Process = R0Process;
269	*ppMem = &pMemOs2->Core;
270	return VINF_SUCCESS;
271	}
272	rtR0MemObjDelete(&pMemOs2->Core);
273	return RTErrConvertFromOS2(rc);
274	}
275
276
277	int rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pv, size_t cb, uint32_t fAccess)
278	{
279	/* create the object. */
280	const ULONG cPages = cb >> PAGE_SHIFT;
281	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, aPages[cPages]), RTR0MEMOBJTYPE_LOCK, pv, cb);
282	if (!pMemOs2)
283	return VERR_NO_MEMORY;
284
285	/* lock it. */
286	ULONG cPagesRet = cPages;
287	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
288	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
289	if (!rc)
290	{
291	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
292	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
293	*ppMem = &pMemOs2->Core;
294	return VINF_SUCCESS;
295	}
296	rtR0MemObjDelete(&pMemOs2->Core);
297	return RTErrConvertFromOS2(rc);
298	}
299
300
301	int rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment)
302	{
303	return VERR_NOT_IMPLEMENTED;
304	}
305
306
307	int rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment, RTR0PROCESS R0Process)
308	{
309	return VERR_NOT_IMPLEMENTED;
310	}
311
312
313	int rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
314	unsigned fProt, size_t offSub, size_t cbSub)
315	{
316	AssertMsgReturn(!offSub && !cbSub, ("%#x %#x\n", offSub, cbSub), VERR_NOT_SUPPORTED);
317	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
318
319	/*
320	* Check that the specified alignment is supported.
321	*/
322	if (uAlignment > PAGE_SIZE)
323	return VERR_NOT_SUPPORTED;
324
325
326	/** @todo finish the implementation. */
327
328	int rc;
329	void *pvR0 = NULL;
330	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
331	switch (pMemToMapOs2->Core.enmType)
332	{
333	/*
334	* These has kernel mappings.
335	*/
336	case RTR0MEMOBJTYPE_PAGE:
337	case RTR0MEMOBJTYPE_LOW:
338	case RTR0MEMOBJTYPE_CONT:
339	pvR0 = pMemToMapOs2->Core.pv;
340	break;
341
342	case RTR0MEMOBJTYPE_PHYS:
343	pvR0 = pMemToMapOs2->Core.pv;
344	if (!pvR0)
345	{
346	/* no ring-0 mapping, so allocate a mapping in the process. */
347	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
348	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
349	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
350	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
351	if (rc)
352	return RTErrConvertFromOS2(rc);
353	pMemToMapOs2->Core.pv = pvR0;
354	}
355	break;
356
357	case RTR0MEMOBJTYPE_PHYS_NC:
358	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
359	return VERR_NOT_IMPLEMENTED;
360	break;
361
362	case RTR0MEMOBJTYPE_LOCK:
363	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
364	return VERR_NOT_SUPPORTED; /** @todo implement this... */
365	pvR0 = pMemToMapOs2->Core.pv;
366	break;
367
368	case RTR0MEMOBJTYPE_RES_VIRT:
369	case RTR0MEMOBJTYPE_MAPPING:
370	default:
371	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
372	return VERR_INTERNAL_ERROR;
373	}
374
375	/*
376	* Create a dummy mapping object for it.
377	*
378	* All mappings are read/write/execute in OS/2 and there isn't
379	* any cache options, so sharing is ok. And the main memory object
380	* isn't actually freed until all the mappings have been freed up
381	* (reference counting).
382	*/
383	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR0, pMemToMapOs2->Core.cb);
384	if (pMemOs2)
385	{
386	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
387	*ppMem = &pMemOs2->Core;
388	return VINF_SUCCESS;
389	}
390	return VERR_NO_MEMORY;
391	}
392
393
394	int rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment, unsigned fProt, RTR0PROCESS R0Process)
395	{
396	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
397	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
398	if (uAlignment > PAGE_SIZE)
399	return VERR_NOT_SUPPORTED;
400
401	int rc;
402	void *pvR0;
403	void *pvR3 = NULL;
404	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
405	switch (pMemToMapOs2->Core.enmType)
406	{
407	/*
408	* These has kernel mappings.
409	*/
410	case RTR0MEMOBJTYPE_PAGE:
411	case RTR0MEMOBJTYPE_LOW:
412	case RTR0MEMOBJTYPE_CONT:
413	pvR0 = pMemToMapOs2->Core.pv;
414	break;
415
416	case RTR0MEMOBJTYPE_PHYS:
417	pvR0 = pMemToMapOs2->Core.pv;
418	#if 0/* this is wrong. */
419	if (!pvR0)
420	{
421	/* no ring-0 mapping, so allocate a mapping in the process. */
422	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
423	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
424	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
425	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
426	if (rc)
427	return RTErrConvertFromOS2(rc);
428	}
429	break;
430	#endif
431	return VERR_NOT_SUPPORTED;
432
433	case RTR0MEMOBJTYPE_PHYS_NC:
434	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
435	return VERR_NOT_IMPLEMENTED;
436	break;
437
438	case RTR0MEMOBJTYPE_LOCK:
439	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
440	return VERR_NOT_SUPPORTED; /** @todo implement this... */
441	pvR0 = pMemToMapOs2->Core.pv;
442	break;
443
444	case RTR0MEMOBJTYPE_RES_VIRT:
445	case RTR0MEMOBJTYPE_MAPPING:
446	default:
447	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
448	return VERR_INTERNAL_ERROR;
449	}
450
451	/*
452	* Map the ring-0 memory into the current process.
453	*/
454	if (!pvR3)
455	{
456	Assert(pvR0);
457	ULONG flFlags = 0;
458	if (uAlignment == PAGE_SIZE)
459	flFlags \|= VMDHGP_4MB;
460	if (fProt & RTMEM_PROT_WRITE)
461	flFlags \|= VMDHGP_WRITE;
462	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
463	if (rc)
464	return RTErrConvertFromOS2(rc);
465	}
466	Assert(pvR3);
467
468	/*
469	* Create a mapping object for it.
470	*/
471	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_OFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING, pvR3, pMemToMapOs2->Core.cb);
472	if (pMemOs2)
473	{
474	Assert(pMemOs2->Core.pv == pvR3);
475	pMemOs2->Core.u.Mapping.R0Process = R0Process;
476	*ppMem = &pMemOs2->Core;
477	return VINF_SUCCESS;
478	}
479	KernVMFree(pvR3);
480	return VERR_NO_MEMORY;
481	}
482
483
484	int rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
485	{
486	NOREF(pMem);
487	NOREF(offSub);
488	NOREF(cbSub);
489	NOREF(fProt);
490	return VERR_NOT_SUPPORTED;
491	}
492
493
494	RTHCPHYS rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
495	{
496	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
497
498	switch (pMemOs2->Core.enmType)
499	{
500	case RTR0MEMOBJTYPE_PAGE:
501	case RTR0MEMOBJTYPE_LOW:
502	case RTR0MEMOBJTYPE_LOCK:
503	case RTR0MEMOBJTYPE_PHYS_NC:
504	return pMemOs2->aPages[iPage].Addr;
505
506	case RTR0MEMOBJTYPE_CONT:
507	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
508
509	case RTR0MEMOBJTYPE_PHYS:
510	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
511
512	case RTR0MEMOBJTYPE_RES_VIRT:
513	case RTR0MEMOBJTYPE_MAPPING:
514	default:
515	return NIL_RTHCPHYS;
516	}
517	}
518
519
520	/**
521	* Expands the page list so we can index pages directly.
522	*
523	* @param paPages The page list array to fix.
524	* @param cPages The number of pages that's supposed to go into the list.
525	* @param cPagesRet The actual number of pages in the list.
526	*/
527	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
528	{
529	Assert(cPages >= cPagesRet);
530	if (cPages != cPagesRet)
531	{
532	ULONG iIn = cPagesRet;
533	ULONG iOut = cPages;
534	do
535	{
536	iIn--;
537	iOut--;
538	Assert(iIn <= iOut);
539
540	KernPageList_t Page = paPages[iIn];
541	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
542	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
543
544	if (Page.Size > PAGE_SIZE)
545	{
546	do
547	{
548	Page.Size -= PAGE_SIZE;
549	paPages[iOut].Addr = Page.Addr + Page.Size;
550	paPages[iOut].Size = PAGE_SIZE;
551	iOut--;
552	} while (Page.Size > PAGE_SIZE);
553	}
554
555	paPages[iOut].Addr = Page.Addr;
556	paPages[iOut].Size = PAGE_SIZE;
557	} while ( iIn != iOut
558	&& iIn > 0);
559	}
560	}
561

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source: vbox/trunk/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp@ 26430

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