IOMInline.h@ 97441

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1	/* $Id: IOMInline.h 96407 2022-08-22 17:43:14Z vboxsync $ */
2	/** @file
3	* IOM - Inlined functions.
4	*/
5
6	/*
7	* Copyright (C) 2006-2022 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28	#ifndef VMM_INCLUDED_SRC_include_IOMInline_h
29	#define VMM_INCLUDED_SRC_include_IOMInline_h
30	#ifndef RT_WITHOUT_PRAGMA_ONCE
31	# pragma once
32	#endif
33
34	#include <iprt/errcore.h>
35
36	/** @addtogroup grp_iom_int Internals
37	* @internal
38	* @{
39	*/
40
41
42	/**
43	* Gets the I/O port entry for the specified I/O port in the current context.
44	*
45	* @returns Pointer to I/O port entry.
46	* @returns NULL if no port registered.
47	*
48	* @param pVM The cross context VM structure.
49	* @param uPort The I/O port to lookup.
50	* @param poffPort Where to return the port offset relative to the
51	* start of the I/O port range.
52	* @param pidxLastHint Pointer to IOMCPU::idxIoPortLastRead or
53	* IOMCPU::idxIoPortLastWrite.
54	*
55	* @note In ring-0 it is possible to get an uninitialized entry (pDevIns is
56	* NULL, cPorts is 0), in which case there should be ring-3 handlers
57	* for the entry. Use IOMIOPORTENTRYR0::idxSelf to get the ring-3
58	* entry.
59	*
60	* @note This code is almost identical to iomMmioGetEntry, so keep in sync.
61	*/
62	DECLINLINE(CTX_SUFF(PIOMIOPORTENTRY)) iomIoPortGetEntry(PVMCC pVM, RTIOPORT uPort, PRTIOPORT poffPort, uint16_t *pidxLastHint)
63	{
64	Assert(IOM_IS_SHARED_LOCK_OWNER(pVM));
65
66	#ifdef IN_RING0
67	uint32_t iEnd = RT_MIN(pVM->iom.s.cIoPortLookupEntries, pVM->iomr0.s.cIoPortAlloc);
68	PCIOMIOPORTLOOKUPENTRY paLookup = pVM->iomr0.s.paIoPortLookup;
69	#else
70	uint32_t iEnd = pVM->iom.s.cIoPortLookupEntries;
71	PCIOMIOPORTLOOKUPENTRY paLookup = pVM->iom.s.paIoPortLookup;
72	#endif
73	if (iEnd > 0)
74	{
75	uint32_t iFirst = 0;
76	uint32_t i = *pidxLastHint;
77	if (i < iEnd)
78	{ /* likely */ }
79	else
80	i = iEnd / 2;
81	for (;;)
82	{
83	PCIOMIOPORTLOOKUPENTRY pCur = &paLookup[i];
84	if (pCur->uFirstPort > uPort)
85	{
86	if (i > iFirst)
87	iEnd = i;
88	else
89	break;
90	}
91	else if (pCur->uLastPort < uPort)
92	{
93	i += 1;
94	if (i < iEnd)
95	iFirst = i;
96	else
97	break;
98	}
99	else
100	{
101	*pidxLastHint = (uint16_t)i;
102	*poffPort = uPort - pCur->uFirstPort;
103
104	/*
105	* Translate the 'idx' member into a pointer.
106	*/
107	size_t const idx = pCur->idx;
108	#ifdef IN_RING0
109	AssertMsg(idx < pVM->iom.s.cIoPortRegs && idx < pVM->iomr0.s.cIoPortAlloc,
110	("%#zx vs %#x/%x (port %#x)\n", idx, pVM->iom.s.cIoPortRegs, pVM->iomr0.s.cIoPortMax, uPort));
111	if (idx < pVM->iomr0.s.cIoPortAlloc)
112	return &pVM->iomr0.s.paIoPortRegs[idx];
113	#else
114	if (idx < pVM->iom.s.cIoPortRegs)
115	return &pVM->iom.s.paIoPortRegs[idx];
116	AssertMsgFailed(("%#zx vs %#x (port %#x)\n", idx, pVM->iom.s.cIoPortRegs, uPort));
117	#endif
118	break;
119	}
120
121	i = iFirst + (iEnd - iFirst) / 2;
122	}
123	}
124	*poffPort = 0;
125	return NULL;
126	}
127
128
129	#ifdef VBOX_WITH_STATISTICS
130	/**
131	* Gets the statistics entry for an I/O port.
132	*
133	* @returns Pointer to stats. Instead of NULL, a pointer to IoPortDummyStats is
134	* returned, so the caller does not need to check for NULL.
135	*
136	* @param pVM The cross context VM structure.
137	* @param pRegEntry The I/O port entry to get stats for.
138	* @param offPort The offset of the port relative to the start of the
139	* registration entry.
140	*/
141	DECLINLINE(PIOMIOPORTSTATSENTRY) iomIoPortGetStats(PVMCC pVM, CTX_SUFF(PIOMIOPORTENTRY) pRegEntry, uint16_t offPort)
142	{
143	size_t idxStats = pRegEntry->idxStats;
144	idxStats += offPort;
145	# ifdef IN_RING0
146	if (idxStats < pVM->iomr0.s.cIoPortStatsAllocation)
147	return &pVM->iomr0.s.paIoPortStats[idxStats];
148	# else
149	if (idxStats < pVM->iom.s.cIoPortStats)
150	return &pVM->iom.s.paIoPortStats[idxStats];
151	# endif
152	return &pVM->iom.s.IoPortDummyStats;
153	}
154	#endif
155
156
157	/**
158	* Gets the MMIO region entry for the specified address in the current context.
159	*
160	* @returns Pointer to MMIO region entry.
161	* @returns NULL if no MMIO region registered for the given address.
162	*
163	* @param pVM The cross context VM structure.
164	* @param GCPhys The address to lookup.
165	* @param poffRegion Where to return the byte offset into the MMIO
166	* region that corresponds to @a GCPhys.
167	* @param pidxLastHint Pointer to IOMCPU::idxMmioLastRead,
168	* IOMCPU::idxMmioLastWrite, or similar.
169	*
170	* @note In ring-0 it is possible to get an uninitialized entry (pDevIns is
171	* NULL, cbRegion is 0), in which case there should be ring-3 handlers
172	* for the entry. Use IOMMMIOENTRYR0::idxSelf to get the ring-3 entry.
173	*
174	* @note This code is almost identical to iomIoPortGetEntry, so keep in sync.
175	*/
176	DECLINLINE(CTX_SUFF(PIOMMMIOENTRY)) iomMmioGetEntry(PVMCC pVM, RTGCPHYS GCPhys, PRTGCPHYS poffRegion, uint16_t *pidxLastHint)
177	{
178	Assert(IOM_IS_SHARED_LOCK_OWNER(pVM));
179
180	#ifdef IN_RING0
181	uint32_t iEnd = RT_MIN(pVM->iom.s.cMmioLookupEntries, pVM->iomr0.s.cMmioAlloc);
182	PCIOMMMIOLOOKUPENTRY paLookup = pVM->iomr0.s.paMmioLookup;
183	#else
184	uint32_t iEnd = pVM->iom.s.cMmioLookupEntries;
185	PCIOMMMIOLOOKUPENTRY paLookup = pVM->iom.s.paMmioLookup;
186	#endif
187	if (iEnd > 0)
188	{
189	uint32_t iFirst = 0;
190	uint32_t i = *pidxLastHint;
191	if (i < iEnd)
192	{ /* likely */ }
193	else
194	i = iEnd / 2;
195	for (;;)
196	{
197	PCIOMMMIOLOOKUPENTRY pCur = &paLookup[i];
198	if (pCur->GCPhysFirst > GCPhys)
199	{
200	if (i > iFirst)
201	iEnd = i;
202	else
203	break;
204	}
205	else if (pCur->GCPhysLast < GCPhys)
206	{
207	i += 1;
208	if (i < iEnd)
209	iFirst = i;
210	else
211	break;
212	}
213	else
214	{
215	*pidxLastHint = (uint16_t)i;
216	*poffRegion = GCPhys - pCur->GCPhysFirst;
217
218	/*
219	* Translate the 'idx' member into a pointer.
220	*/
221	size_t const idx = pCur->idx;
222	#ifdef IN_RING0
223	AssertMsg(idx < pVM->iom.s.cMmioRegs && idx < pVM->iomr0.s.cMmioAlloc,
224	("%#zx vs %#x/%x (GCPhys=%RGp)\n", idx, pVM->iom.s.cMmioRegs, pVM->iomr0.s.cMmioMax, GCPhys));
225	if (idx < pVM->iomr0.s.cMmioAlloc)
226	return &pVM->iomr0.s.paMmioRegs[idx];
227	#else
228	if (idx < pVM->iom.s.cMmioRegs)
229	return &pVM->iom.s.paMmioRegs[idx];
230	AssertMsgFailed(("%#zx vs %#x (GCPhys=%RGp)\n", idx, pVM->iom.s.cMmioRegs, GCPhys));
231	#endif
232	break;
233	}
234
235	i = iFirst + (iEnd - iFirst) / 2;
236	}
237	}
238	*poffRegion = 0;
239	return NULL;
240	}
241
242
243	#ifdef VBOX_WITH_STATISTICS
244	/**
245	* Gets the statistics entry for an MMIO region.
246	*
247	* @returns Pointer to stats. Instead of NULL, a pointer to MmioDummyStats is
248	* returned, so the caller does not need to check for NULL.
249	*
250	* @param pVM The cross context VM structure.
251	* @param pRegEntry The I/O port entry to get stats for.
252	*/
253	DECLINLINE(PIOMMMIOSTATSENTRY) iomMmioGetStats(PVMCC pVM, CTX_SUFF(PIOMMMIOENTRY) pRegEntry)
254	{
255	size_t idxStats = pRegEntry->idxStats;
256	# ifdef IN_RING0
257	if (idxStats < pVM->iomr0.s.cMmioStatsAllocation)
258	return &pVM->iomr0.s.paMmioStats[idxStats];
259	# else
260	if (idxStats < pVM->iom.s.cMmioStats)
261	return &pVM->iom.s.paMmioStats[idxStats];
262	# endif
263	return &pVM->iom.s.MmioDummyStats;
264	}
265	#endif
266
267	/** @} */
268
269	#endif /* !VMM_INCLUDED_SRC_include_IOMInline_h */
270

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source: vbox/trunk/src/VBox/VMM/include/IOMInline.h@ 97441

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