memobj-r0drv-os2.cpp@ 98103

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1	/* $Id: memobj-r0drv-os2.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */
2	/** @file
3	* IPRT - Ring-0 Memory Objects, OS/2.
4	*/
5
6	/*
7	* Contributed by knut st. osmundsen.
8	*
9	* Copyright (C) 2007-2023 Oracle and/or its affiliates.
10	*
11	* This file is part of VirtualBox base platform packages, as
12	* available from https://www.virtualbox.org.
13	*
14	* This program is free software; you can redistribute it and/or
15	* modify it under the terms of the GNU General Public License
16	* as published by the Free Software Foundation, in version 3 of the
17	* License.
18	*
19	* This program is distributed in the hope that it will be useful, but
20	* WITHOUT ANY WARRANTY; without even the implied warranty of
21	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22	* General Public License for more details.
23	*
24	* You should have received a copy of the GNU General Public License
25	* along with this program; if not, see <https://www.gnu.org/licenses>.
26	*
27	* The contents of this file may alternatively be used under the terms
28	* of the Common Development and Distribution License Version 1.0
29	* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
30	* in the VirtualBox distribution, in which case the provisions of the
31	* CDDL are applicable instead of those of the GPL.
32	*
33	* You may elect to license modified versions of this file under the
34	* terms and conditions of either the GPL or the CDDL or both.
35	*
36	* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
37	* --------------------------------------------------------------------
38	*
39	* This code is based on:
40	*
41	* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
42	*
43	* Permission is hereby granted, free of charge, to any person
44	* obtaining a copy of this software and associated documentation
45	* files (the "Software"), to deal in the Software without
46	* restriction, including without limitation the rights to use,
47	* copy, modify, merge, publish, distribute, sublicense, and/or sell
48	* copies of the Software, and to permit persons to whom the
49	* Software is furnished to do so, subject to the following
50	* conditions:
51	*
52	* The above copyright notice and this permission notice shall be
53	* included in all copies or substantial portions of the Software.
54	*
55	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
56	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
57	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
58	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
59	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
60	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
61	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
62	* OTHER DEALINGS IN THE SOFTWARE.
63	*/
64
65
66	/*********************************************************************************************************************************
67	* Header Files *
68	*********************************************************************************************************************************/
69	#include "the-os2-kernel.h"
70
71	#include <iprt/memobj.h>
72	#include <iprt/mem.h>
73	#include <iprt/err.h>
74	#include <iprt/assert.h>
75	#include <iprt/log.h>
76	#include <iprt/param.h>
77	#include <iprt/process.h>
78	#include "internal/memobj.h"
79
80
81	/*********************************************************************************************************************************
82	* Structures and Typedefs *
83	*********************************************************************************************************************************/
84	/**
85	* The OS/2 version of the memory object structure.
86	*/
87	typedef struct RTR0MEMOBJDARWIN
88	{
89	/** The core structure. */
90	RTR0MEMOBJINTERNAL Core;
91	/** Lock for the ring-3 / ring-0 pinned objectes.
92	* This member might not be allocated for some object types. */
93	KernVMLock_t Lock;
94	/** Array of physical pages.
95	* This array can be 0 in length for some object types. */
96	KernPageList_t aPages[1];
97	} RTR0MEMOBJOS2, *PRTR0MEMOBJOS2;
98
99
100	/*********************************************************************************************************************************
101	* Internal Functions *
102	*********************************************************************************************************************************/
103	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet);
104
105
106	DECLHIDDEN(int) rtR0MemObjNativeFree(RTR0MEMOBJ pMem)
107	{
108	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
109	int rc;
110
111	switch (pMemOs2->Core.enmType)
112	{
113	case RTR0MEMOBJTYPE_PHYS_NC:
114	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
115	return VERR_INTERNAL_ERROR;
116
117	case RTR0MEMOBJTYPE_PHYS:
118	if (!pMemOs2->Core.pv)
119	break;
120
121	case RTR0MEMOBJTYPE_MAPPING:
122	if (pMemOs2->Core.u.Mapping.R0Process == NIL_RTR0PROCESS)
123	break;
124
125	RT_FALL_THRU();
126	case RTR0MEMOBJTYPE_PAGE:
127	case RTR0MEMOBJTYPE_LOW:
128	case RTR0MEMOBJTYPE_CONT:
129	rc = KernVMFree(pMemOs2->Core.pv);
130	AssertMsg(!rc, ("rc=%d type=%d pv=%p cb=%#zx\n", rc, pMemOs2->Core.enmType, pMemOs2->Core.pv, pMemOs2->Core.cb));
131	break;
132
133	case RTR0MEMOBJTYPE_LOCK:
134	rc = KernVMUnlock(&pMemOs2->Lock);
135	AssertMsg(!rc, ("rc=%d\n", rc));
136	break;
137
138	case RTR0MEMOBJTYPE_RES_VIRT:
139	default:
140	AssertMsgFailed(("enmType=%d\n", pMemOs2->Core.enmType));
141	return VERR_INTERNAL_ERROR;
142	}
143
144	return VINF_SUCCESS;
145	}
146
147
148	DECLHIDDEN(int) rtR0MemObjNativeAllocPage(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, const char *pszTag)
149	{
150	NOREF(fExecutable);
151
152	/* create the object. */
153	const ULONG cPages = cb >> PAGE_SHIFT;
154	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
155	RTR0MEMOBJTYPE_PAGE, NULL, cb, pszTag);
156	if (pMemOs2)
157	{
158	/* do the allocation. */
159	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
160	if (!rc)
161	{
162	ULONG cPagesRet = cPages;
163	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
164	if (!rc)
165	{
166	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
167	pMemOs2->Core.fFlags \|= RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC; /* doesn't seem to be possible to zero anything */
168	*ppMem = &pMemOs2->Core;
169	return VINF_SUCCESS;
170	}
171	KernVMFree(pMemOs2->Core.pv);
172	}
173	rtR0MemObjDelete(&pMemOs2->Core);
174	return RTErrConvertFromOS2(rc);
175	}
176	return VERR_NO_MEMORY;
177	}
178
179
180	DECLHIDDEN(int) rtR0MemObjNativeAllocLarge(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, size_t cbLargePage, uint32_t fFlags,
181	const char *pszTag)
182	{
183	return rtR0MemObjFallbackAllocLarge(ppMem, cb, cbLargePage, fFlags, pszTag);
184	}
185
186
187	DECLHIDDEN(int) rtR0MemObjNativeAllocLow(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, const char *pszTag)
188	{
189	NOREF(fExecutable);
190
191	/* create the object. */
192	const ULONG cPages = cb >> PAGE_SHIFT;
193	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
194	RTR0MEMOBJTYPE_LOW, NULL, cb, pszTag);
195	if (pMemOs2)
196	{
197	/* do the allocation. */
198	int rc = KernVMAlloc(cb, VMDHA_FIXED, &pMemOs2->Core.pv, (PPVOID)-1, NULL);
199	if (!rc)
200	{
201	ULONG cPagesRet = cPages;
202	rc = KernLinToPageList(pMemOs2->Core.pv, cb, &pMemOs2->aPages[0], &cPagesRet);
203	if (!rc)
204	{
205	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
206	pMemOs2->Core.fFlags \|= RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC; /* doesn't seem to be possible to zero anything */
207	*ppMem = &pMemOs2->Core;
208	return VINF_SUCCESS;
209	}
210	KernVMFree(pMemOs2->Core.pv);
211	}
212	rtR0MemObjDelete(&pMemOs2->Core);
213	rc = RTErrConvertFromOS2(rc);
214	return rc == VERR_NO_MEMORY ? VERR_NO_LOW_MEMORY : rc;
215	}
216	return VERR_NO_MEMORY;
217	}
218
219
220	DECLHIDDEN(int) rtR0MemObjNativeAllocCont(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, bool fExecutable, const char *pszTag)
221	{
222	NOREF(fExecutable);
223
224	/* create the object. */
225	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_CONT,
226	NULL, cb, pszTag);
227	if (pMemOs2)
228	{
229	/* do the allocation. */
230	ULONG ulPhys = ~0UL;
231	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG, &pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
232	if (!rc)
233	{
234	Assert(ulPhys != ~0UL);
235	pMemOs2->Core.fFlags \|= RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC; /* doesn't seem to be possible to zero anything */
236	pMemOs2->Core.u.Cont.Phys = ulPhys;
237	*ppMem = &pMemOs2->Core;
238	return VINF_SUCCESS;
239	}
240	rtR0MemObjDelete(&pMemOs2->Core);
241	return RTErrConvertFromOS2(rc);
242	}
243	return VERR_NO_MEMORY;
244	}
245
246
247	DECLHIDDEN(int) rtR0MemObjNativeAllocPhys(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, size_t uAlignment,
248	const char *pszTag)
249	{
250	AssertMsgReturn(PhysHighest >= 16 *_1M, ("PhysHigest=%RHp\n", PhysHighest), VERR_NOT_SUPPORTED);
251
252	/** @todo alignment */
253	if (uAlignment != PAGE_SIZE)
254	return VERR_NOT_SUPPORTED;
255
256	/* create the object. */
257	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS,
258	NULL, cb, pszTag);
259	if (pMemOs2)
260	{
261	/* do the allocation. */
262	ULONG ulPhys = ~0UL;
263	int rc = KernVMAlloc(cb, VMDHA_FIXED \| VMDHA_CONTIG \| (PhysHighest < _4G ? VMDHA_16M : 0),
264	&pMemOs2->Core.pv, (PPVOID)&ulPhys, NULL);
265	if (!rc)
266	{
267	Assert(ulPhys != ~0UL);
268	pMemOs2->Core.fFlags \|= RTR0MEMOBJ_FLAGS_UNINITIALIZED_AT_ALLOC; /* doesn't seem to be possible to zero anything */
269	pMemOs2->Core.u.Phys.fAllocated = true;
270	pMemOs2->Core.u.Phys.PhysBase = ulPhys;
271	*ppMem = &pMemOs2->Core;
272	return VINF_SUCCESS;
273	}
274	rtR0MemObjDelete(&pMemOs2->Core);
275	return RTErrConvertFromOS2(rc);
276	}
277	return VERR_NO_MEMORY;
278	}
279
280
281	DECLHIDDEN(int) rtR0MemObjNativeAllocPhysNC(PPRTR0MEMOBJINTERNAL ppMem, size_t cb, RTHCPHYS PhysHighest, const char *pszTag)
282	{
283	/** @todo rtR0MemObjNativeAllocPhysNC / os2. */
284	return rtR0MemObjNativeAllocPhys(ppMem, cb, PhysHighest, PAGE_SIZE, pszTag);
285	}
286
287
288	DECLHIDDEN(int) rtR0MemObjNativeEnterPhys(PPRTR0MEMOBJINTERNAL ppMem, RTHCPHYS Phys, size_t cb, uint32_t uCachePolicy,
289	const char *pszTag)
290	{
291	AssertReturn(uCachePolicy == RTMEM_CACHE_POLICY_DONT_CARE, VERR_NOT_SUPPORTED);
292
293	/* create the object. */
294	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_PHYS,
295	NULL, cb, pszTag);
296	if (pMemOs2)
297	{
298	/* there is no allocation here, right? it needs to be mapped somewhere first. */
299	pMemOs2->Core.u.Phys.fAllocated = false;
300	pMemOs2->Core.u.Phys.PhysBase = Phys;
301	pMemOs2->Core.u.Phys.uCachePolicy = uCachePolicy;
302	*ppMem = &pMemOs2->Core;
303	return VINF_SUCCESS;
304	}
305	return VERR_NO_MEMORY;
306	}
307
308
309	DECLHIDDEN(int) rtR0MemObjNativeLockUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3Ptr, size_t cb, uint32_t fAccess,
310	RTR0PROCESS R0Process, const char *pszTag)
311	{
312	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
313
314	/* create the object. */
315	const ULONG cPages = cb >> PAGE_SHIFT;
316	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
317	RTR0MEMOBJTYPE_LOCK, (void *)R3Ptr, cb, pszTag);
318	if (pMemOs2)
319	{
320	/* lock it. */
321	ULONG cPagesRet = cPages;
322	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
323	(void *)R3Ptr, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
324	if (!rc)
325	{
326	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
327	Assert(cb == pMemOs2->Core.cb);
328	Assert(R3Ptr == (RTR3PTR)pMemOs2->Core.pv);
329	pMemOs2->Core.u.Lock.R0Process = R0Process;
330	*ppMem = &pMemOs2->Core;
331	return VINF_SUCCESS;
332	}
333	rtR0MemObjDelete(&pMemOs2->Core);
334	return RTErrConvertFromOS2(rc);
335	}
336	return VERR_NO_MEMORY;
337	}
338
339
340	DECLHIDDEN(int) rtR0MemObjNativeLockKernel(PPRTR0MEMOBJINTERNAL ppMem, void pv, size_t cb, uint32_t fAccess, const char pszTag)
341	{
342	/* create the object. */
343	const ULONG cPages = cb >> PAGE_SHIFT;
344	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF_DYN(RTR0MEMOBJOS2, aPages[cPages]),
345	RTR0MEMOBJTYPE_LOCK, pv, cb, pszTag);
346	if (pMemOs2)
347	{
348	/* lock it. */
349	ULONG cPagesRet = cPages;
350	int rc = KernVMLock(VMDHL_LONG \| (fAccess & RTMEM_PROT_WRITE ? VMDHL_WRITE : 0),
351	pv, cb, &pMemOs2->Lock, &pMemOs2->aPages[0], &cPagesRet);
352	if (!rc)
353	{
354	rtR0MemObjFixPageList(&pMemOs2->aPages[0], cPages, cPagesRet);
355	pMemOs2->Core.u.Lock.R0Process = NIL_RTR0PROCESS;
356	*ppMem = &pMemOs2->Core;
357	return VINF_SUCCESS;
358	}
359	rtR0MemObjDelete(&pMemOs2->Core);
360	return RTErrConvertFromOS2(rc);
361	}
362	return VERR_NO_MEMORY;
363	}
364
365
366	DECLHIDDEN(int) rtR0MemObjNativeReserveKernel(PPRTR0MEMOBJINTERNAL ppMem, void *pvFixed, size_t cb, size_t uAlignment,
367	const char *pszTag)
368	{
369	RT_NOREF(ppMem, pvFixed, cb, uAlignment, pszTag);
370	return VERR_NOT_SUPPORTED;
371	}
372
373
374	DECLHIDDEN(int) rtR0MemObjNativeReserveUser(PPRTR0MEMOBJINTERNAL ppMem, RTR3PTR R3PtrFixed, size_t cb, size_t uAlignment,
375	RTR0PROCESS R0Process, const char *pszTag)
376	{
377	RT_NOREF(ppMem, R3PtrFixed, cb, uAlignment, R0Process, pszTag);
378	return VERR_NOT_SUPPORTED;
379	}
380
381
382	DECLHIDDEN(int) rtR0MemObjNativeMapKernel(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, void *pvFixed, size_t uAlignment,
383	unsigned fProt, size_t offSub, size_t cbSub, const char *pszTag)
384	{
385	AssertMsgReturn(pvFixed == (void *)-1, ("%p\n", pvFixed), VERR_NOT_SUPPORTED);
386
387	/*
388	* Check that the specified alignment is supported.
389	*/
390	if (uAlignment > PAGE_SIZE)
391	return VERR_NOT_SUPPORTED;
392
393	/** @todo finish the implementation. */
394
395	int rc;
396	void *pvR0 = NULL;
397	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
398	switch (pMemToMapOs2->Core.enmType)
399	{
400	/*
401	* These has kernel mappings.
402	*/
403	case RTR0MEMOBJTYPE_PAGE:
404	case RTR0MEMOBJTYPE_LOW:
405	case RTR0MEMOBJTYPE_CONT:
406	pvR0 = pMemToMapOs2->Core.pv;
407	break;
408
409	case RTR0MEMOBJTYPE_PHYS:
410	pvR0 = pMemToMapOs2->Core.pv;
411	if (!pvR0)
412	{
413	/* no ring-0 mapping, so allocate a mapping in the process. */
414	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
415	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
416	ULONG ulPhys = (ULONG)pMemToMapOs2->Core.u.Phys.PhysBase;
417	AssertReturn(ulPhys == pMemToMapOs2->Core.u.Phys.PhysBase, VERR_OUT_OF_RANGE);
418	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS, &pvR0, (PPVOID)&ulPhys, NULL);
419	if (rc)
420	return RTErrConvertFromOS2(rc);
421	pMemToMapOs2->Core.pv = pvR0;
422	}
423	break;
424
425	case RTR0MEMOBJTYPE_PHYS_NC:
426	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
427	return VERR_INTERNAL_ERROR_3;
428
429	case RTR0MEMOBJTYPE_LOCK:
430	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
431	return VERR_NOT_SUPPORTED; /** @todo implement this... */
432	pvR0 = pMemToMapOs2->Core.pv;
433	break;
434
435	case RTR0MEMOBJTYPE_RES_VIRT:
436	case RTR0MEMOBJTYPE_MAPPING:
437	default:
438	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
439	return VERR_INTERNAL_ERROR;
440	}
441
442	/*
443	* Create a dummy mapping object for it.
444	*
445	* All mappings are read/write/execute in OS/2 and there isn't
446	* any cache options, so sharing is ok. And the main memory object
447	* isn't actually freed until all the mappings have been freed up
448	* (reference counting).
449	*/
450	if (!cbSub)
451	cbSub = pMemToMapOs2->Core.cb - offSub;
452	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
453	(uint8_t *)pvR0 + offSub, cbSub, pszTag);
454	if (pMemOs2)
455	{
456	pMemOs2->Core.u.Mapping.R0Process = NIL_RTR0PROCESS;
457	*ppMem = &pMemOs2->Core;
458	return VINF_SUCCESS;
459	}
460	return VERR_NO_MEMORY;
461	}
462
463
464	DECLHIDDEN(int) rtR0MemObjNativeMapUser(PPRTR0MEMOBJINTERNAL ppMem, RTR0MEMOBJ pMemToMap, RTR3PTR R3PtrFixed, size_t uAlignment,
465	unsigned fProt, RTR0PROCESS R0Process, size_t offSub, size_t cbSub, const char *pszTag)
466	{
467	AssertMsgReturn(R0Process == RTR0ProcHandleSelf(), ("%p != %p\n", R0Process, RTR0ProcHandleSelf()), VERR_NOT_SUPPORTED);
468	AssertMsgReturn(R3PtrFixed == (RTR3PTR)-1, ("%p\n", R3PtrFixed), VERR_NOT_SUPPORTED);
469	if (uAlignment > PAGE_SIZE)
470	return VERR_NOT_SUPPORTED;
471	AssertMsgReturn(!offSub && !cbSub, ("%#zx %#zx\n", offSub, cbSub), VERR_NOT_SUPPORTED); /** @todo implement sub maps */
472
473	int rc;
474	void *pvR0;
475	void *pvR3 = NULL;
476	PRTR0MEMOBJOS2 pMemToMapOs2 = (PRTR0MEMOBJOS2)pMemToMap;
477	switch (pMemToMapOs2->Core.enmType)
478	{
479	/*
480	* These has kernel mappings.
481	*/
482	case RTR0MEMOBJTYPE_PAGE:
483	case RTR0MEMOBJTYPE_LOW:
484	case RTR0MEMOBJTYPE_CONT:
485	pvR0 = pMemToMapOs2->Core.pv;
486	break;
487
488	case RTR0MEMOBJTYPE_PHYS:
489	pvR0 = pMemToMapOs2->Core.pv;
490	#if 0/* this is wrong. */
491	if (!pvR0)
492	{
493	/* no ring-0 mapping, so allocate a mapping in the process. */
494	AssertMsgReturn(fProt & RTMEM_PROT_WRITE, ("%#x\n", fProt), VERR_NOT_SUPPORTED);
495	Assert(!pMemToMapOs2->Core.u.Phys.fAllocated);
496	ULONG ulPhys = pMemToMapOs2->Core.u.Phys.PhysBase;
497	rc = KernVMAlloc(pMemToMapOs2->Core.cb, VMDHA_PHYS \| VMDHA_PROCESS, &pvR3, (PPVOID)&ulPhys, NULL);
498	if (rc)
499	return RTErrConvertFromOS2(rc);
500	}
501	break;
502	#endif
503	return VERR_NOT_SUPPORTED;
504
505	case RTR0MEMOBJTYPE_PHYS_NC:
506	AssertMsgFailed(("RTR0MEMOBJTYPE_PHYS_NC\n"));
507	return VERR_INTERNAL_ERROR_5;
508
509	case RTR0MEMOBJTYPE_LOCK:
510	if (pMemToMapOs2->Core.u.Lock.R0Process != NIL_RTR0PROCESS)
511	return VERR_NOT_SUPPORTED; /** @todo implement this... */
512	pvR0 = pMemToMapOs2->Core.pv;
513	break;
514
515	case RTR0MEMOBJTYPE_RES_VIRT:
516	case RTR0MEMOBJTYPE_MAPPING:
517	default:
518	AssertMsgFailed(("enmType=%d\n", pMemToMapOs2->Core.enmType));
519	return VERR_INTERNAL_ERROR;
520	}
521
522	/*
523	* Map the ring-0 memory into the current process.
524	*/
525	if (!pvR3)
526	{
527	Assert(pvR0);
528	ULONG flFlags = 0;
529	if (uAlignment == PAGE_SIZE)
530	flFlags \|= VMDHGP_4MB;
531	if (fProt & RTMEM_PROT_WRITE)
532	flFlags \|= VMDHGP_WRITE;
533	rc = RTR0Os2DHVMGlobalToProcess(flFlags, pvR0, pMemToMapOs2->Core.cb, &pvR3);
534	if (rc)
535	return RTErrConvertFromOS2(rc);
536	}
537	Assert(pvR3);
538
539	/*
540	* Create a mapping object for it.
541	*/
542	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)rtR0MemObjNew(RT_UOFFSETOF(RTR0MEMOBJOS2, Lock), RTR0MEMOBJTYPE_MAPPING,
543	pvR3, pMemToMapOs2->Core.cb, pszTag);
544	if (pMemOs2)
545	{
546	Assert(pMemOs2->Core.pv == pvR3);
547	pMemOs2->Core.u.Mapping.R0Process = R0Process;
548	*ppMem = &pMemOs2->Core;
549	return VINF_SUCCESS;
550	}
551	KernVMFree(pvR3);
552	return VERR_NO_MEMORY;
553	}
554
555
556	DECLHIDDEN(int) rtR0MemObjNativeProtect(PRTR0MEMOBJINTERNAL pMem, size_t offSub, size_t cbSub, uint32_t fProt)
557	{
558	NOREF(pMem);
559	NOREF(offSub);
560	NOREF(cbSub);
561	NOREF(fProt);
562	return VERR_NOT_SUPPORTED;
563	}
564
565
566	DECLHIDDEN(RTHCPHYS) rtR0MemObjNativeGetPagePhysAddr(PRTR0MEMOBJINTERNAL pMem, size_t iPage)
567	{
568	PRTR0MEMOBJOS2 pMemOs2 = (PRTR0MEMOBJOS2)pMem;
569
570	switch (pMemOs2->Core.enmType)
571	{
572	case RTR0MEMOBJTYPE_PAGE:
573	case RTR0MEMOBJTYPE_LOW:
574	case RTR0MEMOBJTYPE_LOCK:
575	case RTR0MEMOBJTYPE_PHYS_NC:
576	return pMemOs2->aPages[iPage].Addr;
577
578	case RTR0MEMOBJTYPE_CONT:
579	return pMemOs2->Core.u.Cont.Phys + (iPage << PAGE_SHIFT);
580
581	case RTR0MEMOBJTYPE_PHYS:
582	return pMemOs2->Core.u.Phys.PhysBase + (iPage << PAGE_SHIFT);
583
584	case RTR0MEMOBJTYPE_RES_VIRT:
585	case RTR0MEMOBJTYPE_MAPPING:
586	default:
587	return NIL_RTHCPHYS;
588	}
589	}
590
591
592	/**
593	* Expands the page list so we can index pages directly.
594	*
595	* @param paPages The page list array to fix.
596	* @param cPages The number of pages that's supposed to go into the list.
597	* @param cPagesRet The actual number of pages in the list.
598	*/
599	static void rtR0MemObjFixPageList(KernPageList_t *paPages, ULONG cPages, ULONG cPagesRet)
600	{
601	Assert(cPages >= cPagesRet);
602	if (cPages != cPagesRet)
603	{
604	ULONG iIn = cPagesRet;
605	ULONG iOut = cPages;
606	do
607	{
608	iIn--;
609	iOut--;
610	Assert(iIn <= iOut);
611
612	KernPageList_t Page = paPages[iIn];
613	Assert(!(Page.Addr & PAGE_OFFSET_MASK));
614	Assert(Page.Size == RT_ALIGN_Z(Page.Size, PAGE_SIZE));
615
616	if (Page.Size > PAGE_SIZE)
617	{
618	do
619	{
620	Page.Size -= PAGE_SIZE;
621	paPages[iOut].Addr = Page.Addr + Page.Size;
622	paPages[iOut].Size = PAGE_SIZE;
623	iOut--;
624	} while (Page.Size > PAGE_SIZE);
625	}
626
627	paPages[iOut].Addr = Page.Addr;
628	paPages[iOut].Size = PAGE_SIZE;
629	} while ( iIn != iOut
630	&& iIn > 0);
631	}
632	}
633

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source: vbox/trunk/src/VBox/Runtime/r0drv/os2/memobj-r0drv-os2.cpp@ 98103

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