VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMAll/PDMAll.cpp@ 2744

Last change on this file since 2744 was 2297, checked in by vboxsync, 18 years ago

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1/* $Id: PDMAll.cpp 2297 2007-04-20 23:51:13Z vboxsync $ */
2/** @file
3 * PDM Critical Sections
4 */
5
6/*
7 * Copyright (C) 2006 InnoTek Systemberatung GmbH
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License as published by the Free Software Foundation,
13 * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
14 * distribution. VirtualBox OSE is distributed in the hope that it will
15 * be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * If you received this file as part of a commercial VirtualBox
18 * distribution, then only the terms of your commercial VirtualBox
19 * license agreement apply instead of the previous paragraph.
20 */
21
22
23/*******************************************************************************
24* Header Files *
25*******************************************************************************/
26#define LOG_GROUP LOG_GROUP_PDM
27#include "PDMInternal.h"
28#include <VBox/pdm.h>
29#include <VBox/mm.h>
30#include <VBox/vm.h>
31#include <VBox/err.h>
32
33#include <VBox/log.h>
34#include <iprt/asm.h>
35#include <iprt/assert.h>
36
37
38/**
39 * Gets the pending interrupt.
40 *
41 * @returns VBox status code.
42 * @param pVM VM handle.
43 * @param pu8Interrupt Where to store the interrupt on success.
44 */
45PDMDECL(int) PDMGetInterrupt(PVM pVM, uint8_t *pu8Interrupt)
46{
47 pdmLock(pVM);
48
49 /*
50 * The local APIC has a higer priority than the PIC.
51 */
52 if (VM_FF_ISSET(pVM, VM_FF_INTERRUPT_APIC))
53 {
54 VM_FF_CLEAR(pVM, VM_FF_INTERRUPT_APIC);
55 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
56 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pfnGetInterrupt));
57 int i = pVM->pdm.s.Apic.CTXALLSUFF(pfnGetInterrupt)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
58 AssertMsg(i <= 255 && i >= 0, ("i=%d\n", i));
59 if (i >= 0)
60 {
61 pdmUnlock(pVM);
62 *pu8Interrupt = (uint8_t)i;
63 return VINF_SUCCESS;
64 }
65 }
66
67 /*
68 * Check the PIC.
69 */
70 if (VM_FF_ISSET(pVM, VM_FF_INTERRUPT_PIC))
71 {
72 VM_FF_CLEAR(pVM, VM_FF_INTERRUPT_PIC);
73 Assert(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns));
74 Assert(pVM->pdm.s.Pic.CTXALLSUFF(pfnGetInterrupt));
75 int i = pVM->pdm.s.Pic.CTXALLSUFF(pfnGetInterrupt)(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns));
76 AssertMsg(i <= 255 && i >= 0, ("i=%d\n", i));
77 if (i >= 0)
78 {
79 pdmUnlock(pVM);
80 *pu8Interrupt = (uint8_t)i;
81 return VINF_SUCCESS;
82 }
83 }
84
85#ifndef VBOX_WITH_PDM_LOCK /** @todo Figure out exactly why we can get here without anything being set. (REM) */
86 /* Shouldn't get here! Noone should call us without cause. */
87 Assert(VM_FF_ISPENDING(pVM, VM_FF_INTERRUPT_APIC | VM_FF_INTERRUPT_PIC));
88#endif
89 pdmUnlock(pVM);
90 return VERR_NO_DATA;
91}
92
93
94/**
95 * Sets the pending interrupt.
96 *
97 * @returns VBox status code.
98 * @param pVM VM handle.
99 * @param u8Irq The IRQ line.
100 * @param u8Level The new level.
101 */
102PDMDECL(int) PDMIsaSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
103{
104 pdmLock(pVM);
105
106 int rc = VERR_PDM_NO_PIC_INSTANCE;
107 if (pVM->pdm.s.Pic.CTXALLSUFF(pDevIns))
108 {
109 Assert(pVM->pdm.s.Pic.CTXALLSUFF(pfnSetIrq));
110 pVM->pdm.s.Pic.CTXALLSUFF(pfnSetIrq)(pVM->pdm.s.Pic.CTXALLSUFF(pDevIns), u8Irq, u8Level);
111 rc = VINF_SUCCESS;
112 }
113
114 if (pVM->pdm.s.IoApic.CTXALLSUFF(pDevIns))
115 {
116 Assert(pVM->pdm.s.IoApic.CTXALLSUFF(pfnSetIrq));
117 pVM->pdm.s.IoApic.CTXALLSUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTXALLSUFF(pDevIns), u8Irq, u8Level);
118 rc = VINF_SUCCESS;
119 }
120
121 pdmUnlock(pVM);
122 return rc;
123}
124
125
126/**
127 * Sets the pending I/O APIC interrupt.
128 *
129 * @returns VBox status code.
130 * @param pVM VM handle.
131 * @param u8Irq The IRQ line.
132 * @param u8Level The new level.
133 */
134PDMDECL(int) PDMIoApicSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
135{
136 if (pVM->pdm.s.IoApic.CTXALLSUFF(pDevIns))
137 {
138 Assert(pVM->pdm.s.IoApic.CTXALLSUFF(pfnSetIrq));
139 pdmLock(pVM);
140 pVM->pdm.s.IoApic.CTXALLSUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTXALLSUFF(pDevIns), u8Irq, u8Level);
141 pdmUnlock(pVM);
142 return VINF_SUCCESS;
143 }
144 return VERR_PDM_NO_PIC_INSTANCE;
145}
146
147
148/**
149 * Set the APIC base.
150 *
151 * @returns VBox status code.
152 * @param pVM VM handle.
153 * @param u64Base The new base.
154 */
155PDMDECL(int) PDMApicSetBase(PVM pVM, uint64_t u64Base)
156{
157 if (pVM->pdm.s.Apic.CTXALLSUFF(pDevIns))
158 {
159 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pfnSetBase));
160 pdmLock(pVM);
161 pVM->pdm.s.Apic.CTXALLSUFF(pfnSetBase)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns), u64Base);
162 pdmUnlock(pVM);
163 return VINF_SUCCESS;
164 }
165 return VERR_PDM_NO_APIC_INSTANCE;
166}
167
168
169/**
170 * Get the APIC base.
171 *
172 * @returns VBox status code.
173 * @param pVM VM handle.
174 * @param pu64Base Where to store the APIC base.
175 */
176PDMDECL(int) PDMApicGetBase(PVM pVM, uint64_t *pu64Base)
177{
178 if (pVM->pdm.s.Apic.CTXALLSUFF(pDevIns))
179 {
180 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pfnGetBase));
181 pdmLock(pVM);
182 *pu64Base = pVM->pdm.s.Apic.CTXALLSUFF(pfnGetBase)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
183 pdmUnlock(pVM);
184 return VINF_SUCCESS;
185 }
186 *pu64Base = 0;
187 return VERR_PDM_NO_APIC_INSTANCE;
188}
189
190
191/**
192 * Set the TPR (task priority register?).
193 *
194 * @returns VBox status code.
195 * @param pVM VM handle.
196 * @param u8TPR The new TPR.
197 */
198PDMDECL(int) PDMApicSetTPR(PVM pVM, uint8_t u8TPR)
199{
200 if (pVM->pdm.s.Apic.CTXALLSUFF(pDevIns))
201 {
202 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pfnSetTPR));
203 pdmLock(pVM);
204 pVM->pdm.s.Apic.CTXALLSUFF(pfnSetTPR)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns), u8TPR);
205 pdmUnlock(pVM);
206 return VINF_SUCCESS;
207 }
208 return VERR_PDM_NO_APIC_INSTANCE;
209}
210
211
212/**
213 * Get the TPR (task priority register?).
214 *
215 * @returns The current TPR.
216 * @param pVM VM handle.
217 * @param pu8TPR Where to store the TRP.
218 */
219PDMDECL(int) PDMApicGetTPR(PVM pVM, uint8_t *pu8TPR)
220{
221 if (pVM->pdm.s.Apic.CTXALLSUFF(pDevIns))
222 {
223 Assert(pVM->pdm.s.Apic.CTXALLSUFF(pfnGetTPR));
224 pdmLock(pVM);
225 *pu8TPR = pVM->pdm.s.Apic.CTXALLSUFF(pfnGetTPR)(pVM->pdm.s.Apic.CTXALLSUFF(pDevIns));
226 pdmUnlock(pVM);
227 return VINF_SUCCESS;
228 }
229 *pu8TPR = 0;
230 return VERR_PDM_NO_APIC_INSTANCE;
231}
232
233
234#ifdef VBOX_WITH_PDM_LOCK
235/**
236 * Locks PDM.
237 * This might call back to Ring-3 in order to deal with lock contention in GC and R3.
238 *
239 * @param pVM The VM handle.
240 */
241void pdmLock(PVM pVM)
242{
243#ifdef IN_RING3
244 int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_INTERNAL_ERROR);
245#else
246 int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_GENERAL_FAILURE);
247 if (rc == VERR_GENERAL_FAILURE)
248 {
249# ifdef IN_GC
250 rc = VMMGCCallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
251#else
252 rc = VMMR0CallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
253#endif
254 }
255#endif
256 AssertRC(rc);
257}
258
259
260/**
261 * Locks PDM but don't go to ring-3 if it's owned by someone.
262 *
263 * @returns VINF_SUCCESS on success.
264 * @returns rc if we're in GC or R0 and can't get the lock.
265 * @param pVM The VM handle.
266 * @param rc The RC to return in GC or R0 when we can't get the lock.
267 */
268int pdmLockEx(PVM pVM, int rc)
269{
270 return PDMCritSectEnter(&pVM->pdm.s.CritSect, rc);
271}
272
273
274/**
275 * Unlocks PDM.
276 *
277 * @param pVM The VM handle.
278 */
279void pdmUnlock(PVM pVM)
280{
281 PDMCritSectLeave(&pVM->pdm.s.CritSect);
282}
283#endif /* VBOX_WITH_PDM_LOCK */
284
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