VirtualBox

source: vbox/trunk/src/VBox/VMM/VMMAll/PDMAll.cpp@ 11985

Last change on this file since 11985 was 11261, checked in by vboxsync, 16 years ago

#1865: DevPIC.
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1/* $Id: PDMAll.cpp 11261 2008-08-08 15:46:17Z vboxsync $ */
2/** @file
3 * PDM Critical Sections
4 */
5
6/*
7 * Copyright (C) 2006-2007 Sun Microsystems, Inc.
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 (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 *
17 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
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.CTX_SUFF(pDevIns));
56 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetInterrupt));
57 int i = pVM->pdm.s.Apic.CTX_SUFF(pfnGetInterrupt)(pVM->pdm.s.Apic.CTX_SUFF(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.CTX_SUFF(pDevIns));
74 Assert(pVM->pdm.s.Pic.CTX_SUFF(pfnGetInterrupt));
75 int i = pVM->pdm.s.Pic.CTX_SUFF(pfnGetInterrupt)(pVM->pdm.s.Pic.CTX_SUFF(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 /** @todo Figure out exactly why we can get here without anything being set. (REM) */
86
87 pdmUnlock(pVM);
88 return VERR_NO_DATA;
89}
90
91
92/**
93 * Sets the pending interrupt.
94 *
95 * @returns VBox status code.
96 * @param pVM VM handle.
97 * @param u8Irq The IRQ line.
98 * @param u8Level The new level.
99 */
100PDMDECL(int) PDMIsaSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
101{
102 pdmLock(pVM);
103
104 int rc = VERR_PDM_NO_PIC_INSTANCE;
105 if (pVM->pdm.s.Pic.CTX_SUFF(pDevIns))
106 {
107 Assert(pVM->pdm.s.Pic.CTX_SUFF(pfnSetIrq));
108 pVM->pdm.s.Pic.CTX_SUFF(pfnSetIrq)(pVM->pdm.s.Pic.CTX_SUFF(pDevIns), u8Irq, u8Level);
109 rc = VINF_SUCCESS;
110 }
111
112 if (pVM->pdm.s.IoApic.CTX_SUFF(pDevIns))
113 {
114 Assert(pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq));
115 pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTX_SUFF(pDevIns), u8Irq, u8Level);
116 rc = VINF_SUCCESS;
117 }
118
119 pdmUnlock(pVM);
120 return rc;
121}
122
123
124/**
125 * Sets the pending I/O APIC interrupt.
126 *
127 * @returns VBox status code.
128 * @param pVM VM handle.
129 * @param u8Irq The IRQ line.
130 * @param u8Level The new level.
131 */
132PDMDECL(int) PDMIoApicSetIrq(PVM pVM, uint8_t u8Irq, uint8_t u8Level)
133{
134 if (pVM->pdm.s.IoApic.CTX_SUFF(pDevIns))
135 {
136 Assert(pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq));
137 pdmLock(pVM);
138 pVM->pdm.s.IoApic.CTX_SUFF(pfnSetIrq)(pVM->pdm.s.IoApic.CTX_SUFF(pDevIns), u8Irq, u8Level);
139 pdmUnlock(pVM);
140 return VINF_SUCCESS;
141 }
142 return VERR_PDM_NO_PIC_INSTANCE;
143}
144
145
146/**
147 * Set the APIC base.
148 *
149 * @returns VBox status code.
150 * @param pVM VM handle.
151 * @param u64Base The new base.
152 */
153PDMDECL(int) PDMApicSetBase(PVM pVM, uint64_t u64Base)
154{
155 if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
156 {
157 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetBase));
158 pdmLock(pVM);
159 pVM->pdm.s.Apic.CTX_SUFF(pfnSetBase)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns), u64Base);
160 pdmUnlock(pVM);
161 return VINF_SUCCESS;
162 }
163 return VERR_PDM_NO_APIC_INSTANCE;
164}
165
166
167/**
168 * Get the APIC base.
169 *
170 * @returns VBox status code.
171 * @param pVM VM handle.
172 * @param pu64Base Where to store the APIC base.
173 */
174PDMDECL(int) PDMApicGetBase(PVM pVM, uint64_t *pu64Base)
175{
176 if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
177 {
178 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetBase));
179 pdmLock(pVM);
180 *pu64Base = pVM->pdm.s.Apic.CTX_SUFF(pfnGetBase)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
181 pdmUnlock(pVM);
182 return VINF_SUCCESS;
183 }
184 *pu64Base = 0;
185 return VERR_PDM_NO_APIC_INSTANCE;
186}
187
188
189/**
190 * Check if the APIC has a pending interrupt/if a TPR change would active one.
191 *
192 * @returns VINF_SUCCESS or VERR_PDM_NO_APIC_INSTANCE.
193 * @param pDevIns Device instance of the APIC.
194 * @param pfPending Pending state (out).
195 */
196PDMDECL(int) PDMApicHasPendingIrq(PVM pVM, bool *pfPending)
197{
198 if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
199 {
200 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR));
201 pdmLock(pVM);
202 *pfPending = pVM->pdm.s.Apic.CTX_SUFF(pfnHasPendingIrq)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
203 pdmUnlock(pVM);
204 return VINF_SUCCESS;
205 }
206 return VERR_PDM_NO_APIC_INSTANCE;
207}
208
209
210/**
211 * Set the TPR (task priority register?).
212 *
213 * @returns VBox status code.
214 * @param pVM VM handle.
215 * @param u8TPR The new TPR.
216 */
217PDMDECL(int) PDMApicSetTPR(PVM pVM, uint8_t u8TPR)
218{
219 if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
220 {
221 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR));
222 pdmLock(pVM);
223 pVM->pdm.s.Apic.CTX_SUFF(pfnSetTPR)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns), u8TPR);
224 pdmUnlock(pVM);
225 return VINF_SUCCESS;
226 }
227 return VERR_PDM_NO_APIC_INSTANCE;
228}
229
230
231/**
232 * Get the TPR (task priority register).
233 *
234 * @returns The current TPR.
235 * @param pVM VM handle.
236 * @param pu8TPR Where to store the TRP.
237 * @param pfPending Pending interrupt state (out).
238*/
239PDMDECL(int) PDMApicGetTPR(PVM pVM, uint8_t *pu8TPR, bool *pfPending)
240{
241 if (pVM->pdm.s.Apic.CTX_SUFF(pDevIns))
242 {
243 Assert(pVM->pdm.s.Apic.CTX_SUFF(pfnGetTPR));
244 pdmLock(pVM);
245 *pu8TPR = pVM->pdm.s.Apic.CTX_SUFF(pfnGetTPR)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
246 if (pfPending)
247 *pfPending = pVM->pdm.s.Apic.CTX_SUFF(pfnHasPendingIrq)(pVM->pdm.s.Apic.CTX_SUFF(pDevIns));
248 pdmUnlock(pVM);
249 return VINF_SUCCESS;
250 }
251 *pu8TPR = 0;
252 return VERR_PDM_NO_APIC_INSTANCE;
253}
254
255
256/**
257 * Locks PDM.
258 * This might call back to Ring-3 in order to deal with lock contention in GC and R3.
259 *
260 * @param pVM The VM handle.
261 */
262void pdmLock(PVM pVM)
263{
264#ifdef IN_RING3
265 int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_INTERNAL_ERROR);
266#else
267 int rc = PDMCritSectEnter(&pVM->pdm.s.CritSect, VERR_GENERAL_FAILURE);
268 if (rc == VERR_GENERAL_FAILURE)
269 {
270# ifdef IN_GC
271 rc = VMMGCCallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
272# else
273 rc = VMMR0CallHost(pVM, VMMCALLHOST_PDM_LOCK, 0);
274# endif
275 }
276#endif
277 AssertRC(rc);
278}
279
280
281/**
282 * Locks PDM but don't go to ring-3 if it's owned by someone.
283 *
284 * @returns VINF_SUCCESS on success.
285 * @returns rc if we're in GC or R0 and can't get the lock.
286 * @param pVM The VM handle.
287 * @param rc The RC to return in GC or R0 when we can't get the lock.
288 */
289int pdmLockEx(PVM pVM, int rc)
290{
291 return PDMCritSectEnter(&pVM->pdm.s.CritSect, rc);
292}
293
294
295/**
296 * Unlocks PDM.
297 *
298 * @param pVM The VM handle.
299 */
300void pdmUnlock(PVM pVM)
301{
302 PDMCritSectLeave(&pVM->pdm.s.CritSect);
303}
304
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