DevPIC.cpp@ 78097

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1	/* $Id: DevPIC.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* DevPIC - Intel 8259 Programmable Interrupt Controller (PIC) Device.
4	*/
5
6	/*
7	* Copyright (C) 2006-2019 Oracle Corporation
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	*
18	* This code is based on:
19	*
20	* QEMU 8259 interrupt controller emulation
21	*
22	* Copyright (c) 2003-2004 Fabrice Bellard
23	*
24	* Permission is hereby granted, free of charge, to any person obtaining a copy
25	* of this software and associated documentation files (the "Software"), to deal
26	* in the Software without restriction, including without limitation the rights
27	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
28	* copies of the Software, and to permit persons to whom the Software is
29	* furnished to do so, subject to the following conditions:
30	*
31	* The above copyright notice and this permission notice shall be included in
32	* all copies or substantial portions of the Software.
33	*
34	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
35	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
36	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
37	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
38	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
39	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
40	* THE SOFTWARE.
41	*
42	*/
43
44
45	/*********************************************************************************************************************************
46	* Header Files *
47	*********************************************************************************************************************************/
48	#define LOG_GROUP LOG_GROUP_DEV_PIC
49	#include <VBox/vmm/pdmdev.h>
50	#include <VBox/log.h>
51	#include <iprt/assert.h>
52	#include <iprt/string.h>
53
54	#include "VBoxDD.h"
55
56
57	/*********************************************************************************************************************************
58	* Defined Constants And Macros *
59	*********************************************************************************************************************************/
60	/** @def PIC_LOCK
61	* Acquires the PDM lock. This is a NOP if locking is disabled. */
62	/** @def PIC_UNLOCK
63	* Releases the PDM lock. This is a NOP if locking is disabled. */
64	#define PIC_LOCK(pThis, rc) \
65	do { \
66	int rc2 = (pThis)->CTX_SUFF(pPicHlp)->pfnLock((pThis)->CTX_SUFF(pDevIns), rc); \
67	if (rc2 != VINF_SUCCESS) \
68	return rc2; \
69	} while (0)
70	#define PIC_UNLOCK(pThis) \
71	(pThis)->CTX_SUFF(pPicHlp)->pfnUnlock((pThis)->CTX_SUFF(pDevIns))
72
73
74	/* debug PIC */
75	#define DEBUG_PIC
76
77	/#define DEBUG_IRQ_COUNT/
78
79	/**
80	* The instance data of one (1) PIC.
81	*/
82	typedef struct PICSTATE
83	{
84	uint8_t last_irr; /*< edge detection /
85	uint8_t irr; /*< interrupt request register /
86	uint8_t imr; /*< interrupt mask register /
87	uint8_t isr; /*< interrupt service register /
88	uint8_t priority_add; /*< highest irq priority /
89	uint8_t irq_base;
90	uint8_t read_reg_select;
91	uint8_t poll;
92	uint8_t special_mask;
93	uint8_t init_state;
94	uint8_t auto_eoi;
95	uint8_t rotate_on_auto_eoi;
96	uint8_t special_fully_nested_mode;
97	uint8_t init4; /*< true if 4 byte init /
98	uint8_t elcr; /*< PIIX edge/trigger selection/
99	uint8_t elcr_mask;
100	/** Pointer to the device instance, R3 Ptr. */
101	PPDMDEVINSR3 pDevInsR3;
102	/** Pointer to the device instance, R0 Ptr. */
103	PPDMDEVINSR0 pDevInsR0;
104	/** Pointer to the device instance, RC Ptr. */
105	PPDMDEVINSRC pDevInsRC;
106	/** The PIC index (0 or 1). */
107	uint8_t idxPic;
108	uint8_t abAlignment0[3]; /*< Alignment padding. /
109	/** The IRQ tags and source IDs for each (tracing purposes). */
110	uint32_t auTags[8];
111	} PICSTATE;
112	/** Pointer to the state of one PIC. */
113	typedef PICSTATE *PPICSTATE;
114
115
116	/**
117	* The whole PIC device instance data.
118	*/
119	typedef struct DEVPIC
120	{
121	/** The two interrupt controllers. */
122	PICSTATE aPics[2];
123	/** Pointer to the device instance - R3 Ptr. */
124	PPDMDEVINSR3 pDevInsR3;
125	/** Pointer to the PIC R3 helpers. */
126	PCPDMPICHLPR3 pPicHlpR3;
127	/** Pointer to the device instance - R0 Ptr. */
128	PPDMDEVINSR0 pDevInsR0;
129	/** Pointer to the PIC R0 helpers. */
130	PCPDMPICHLPR0 pPicHlpR0;
131	/** Pointer to the device instance - RC Ptr. */
132	PPDMDEVINSRC pDevInsRC;
133	/** Pointer to the PIC RC helpers. */
134	PCPDMPICHLPRC pPicHlpRC;
135	/** Number of release log entries. Used to prevent flooding. */
136	uint32_t cRelLogEntries;
137	uint32_t u32AlignmentPadding;
138	#ifdef VBOX_WITH_STATISTICS
139	STAMCOUNTER StatSetIrqGC;
140	STAMCOUNTER StatSetIrqHC;
141	STAMCOUNTER StatClearedActiveIRQ2;
142	STAMCOUNTER StatClearedActiveMasterIRQ;
143	STAMCOUNTER StatClearedActiveSlaveIRQ;
144	#endif
145	} DEVPIC;
146	/** Pointer to the whole PIC instance data. */
147	typedef DEVPIC *PDEVPIC;
148
149
150	#ifndef VBOX_DEVICE_STRUCT_TESTCASE
151	#ifdef LOG_ENABLED
152	DECLINLINE(void) DumpPICState(PPICSTATE pPic, const char *pszFn)
153	{
154	PDEVPIC pThis = PDMINS_2_DATA(pPic->CTX_SUFF(pDevIns), PDEVPIC);
155
156	Log2(("%s: pic%d: elcr=%x last_irr=%x irr=%x imr=%x isr=%x irq_base=%x\n",
157	pszFn, (&pThis->aPics[0] == pPic) ? 0 : 1,
158	pPic->elcr, pPic->last_irr, pPic->irr, pPic->imr, pPic->isr, pPic->irq_base));
159	}
160	#else
161	# define DumpPICState(pThis, szFn) do { } while (0)
162	#endif
163
164	/* set irq level. If an edge is detected, then the IRR is set to 1 */
165	DECLINLINE(void) pic_set_irq1(PPICSTATE pPic, int irq, int level, uint32_t uTagSrc)
166	{
167	Log(("pic_set_irq1: irq=%d level=%d\n", irq, level));
168	int mask = 1 << irq;
169	if (pPic->elcr & mask)
170	{
171	/* level triggered */
172	if (level)
173	{
174	Log2(("pic_set_irq1(ls) irr=%d irrnew=%d\n", pPic->irr, pPic->irr \| mask));
175	pPic->irr \|= mask;
176	pPic->last_irr \|= mask;
177	}
178	else
179	{
180	Log2(("pic_set_irq1(lc) irr=%d irrnew=%d\n", pPic->irr, pPic->irr & ~mask));
181	pPic->irr &= ~mask;
182	pPic->last_irr &= ~mask;
183	}
184	}
185	else
186	{
187	/* edge triggered */
188	if (level)
189	{
190	if ((pPic->last_irr & mask) == 0)
191	{
192	Log2(("pic_set_irq1 irr=%x last_irr=%x\n", pPic->irr \| mask, pPic->last_irr));
193	pPic->irr \|= mask;
194	}
195	pPic->last_irr \|= mask;
196	}
197	else
198	{
199	pPic->irr &= ~mask;
200	pPic->last_irr &= ~mask;
201	}
202	}
203
204	/* Save the tag. */
205	if (level)
206	{
207	if (!pPic->auTags[irq])
208	pPic->auTags[irq] = uTagSrc;
209	else
210	pPic->auTags[irq] \|= RT_BIT_32(31);
211	}
212
213	DumpPICState(pPic, "pic_set_irq1");
214	}
215
216	/* return the highest priority found in mask (highest = smallest
217	number). Return 8 if no irq */
218	DECLINLINE(int) get_priority(PPICSTATE pPic, int mask)
219	{
220	int priority;
221	if (mask == 0)
222	return 8;
223	priority = 0;
224	while ((mask & (1 << ((priority + pPic->priority_add) & 7))) == 0)
225	priority++;
226	return priority;
227	}
228
229	/* return the pic wanted interrupt. return -1 if none */
230	static int pic_get_irq(PPICSTATE pPic)
231	{
232	int mask, cur_priority, priority;
233	Log(("pic_get_irq%d: mask=%x\n", pPic->idxPic, pPic->irr & ~pPic->imr));
234	DumpPICState(pPic, "pic_get_irq");
235
236	mask = pPic->irr & ~pPic->imr;
237	priority = get_priority(pPic, mask);
238	Log(("pic_get_irq: priority=%x\n", priority));
239	if (priority == 8)
240	return -1;
241	/* compute current priority. If special fully nested mode on the
242	master, the IRQ coming from the slave is not taken into account
243	for the priority computation. */
244	mask = pPic->isr;
245	if (pPic->special_mask)
246	mask &= ~pPic->imr;
247	if (pPic->special_fully_nested_mode && pPic->idxPic == 0)
248	mask &= ~(1 << 2);
249	cur_priority = get_priority(pPic, mask);
250	Log(("pic_get_irq%d: cur_priority=%x pending=%d\n", pPic->idxPic,
251	cur_priority, (priority == 8) ? -1 : (priority + pPic->priority_add) & 7));
252	if (priority < cur_priority)
253	{
254	/* higher priority found: an irq should be generated */
255	return (priority + pPic->priority_add) & 7;
256	}
257	return -1;
258	}
259
260	/* raise irq to CPU if necessary. must be called every time the active
261	irq may change */
262	static int pic_update_irq(PDEVPIC pThis)
263	{
264	int irq2, irq;
265
266	/* first look at slave pic */
267	irq2 = pic_get_irq(&pThis->aPics[1]);
268	Log(("pic_update_irq irq2=%d\n", irq2));
269	if (irq2 >= 0)
270	{
271	/* if irq request by slave pic, signal master PIC */
272	pic_set_irq1(&pThis->aPics[0], 2, 1, pThis->aPics[1].auTags[irq2]);
273	}
274	else
275	{
276	/* If not, clear the IR on the master PIC. */
277	pic_set_irq1(&pThis->aPics[0], 2, 0, 0 /uTagSrc/);
278	}
279	/* look at requested irq */
280	irq = pic_get_irq(&pThis->aPics[0]);
281	if (irq >= 0)
282	{
283	/* If irq 2 is pending on the master pic, then there must be one pending on the slave pic too! Otherwise we'll get
284	* spurious slave interrupts in picGetInterrupt.
285	*/
286	if (irq != 2 \|\| irq2 != -1)
287	{
288	#if defined(DEBUG_PIC)
289	for (int i = 0; i < 2; i++)
290	Log(("pic%d: imr=%x irr=%x padd=%d\n", i, pThis->aPics[i].imr, pThis->aPics[i].irr, pThis->aPics[i].priority_add));
291	Log(("pic: cpu_interrupt\n"));
292	#endif
293	pThis->CTX_SUFF(pPicHlp)->pfnSetInterruptFF(pThis->CTX_SUFF(pDevIns));
294	}
295	else
296	{
297	STAM_COUNTER_INC(&pThis->StatClearedActiveIRQ2);
298	Log(("pic_update_irq: irq 2 is active, but no interrupt is pending on the slave pic!!\n"));
299	/* Clear it here, so lower priority interrupts can still be dispatched. */
300
301	/* if this was the only pending irq, then we must clear the interrupt ff flag */
302	pThis->CTX_SUFF(pPicHlp)->pfnClearInterruptFF(pThis->CTX_SUFF(pDevIns));
303
304	/** @todo Is this correct? */
305	pThis->aPics[0].irr &= ~(1 << 2);
306
307	/* Call ourselves again just in case other interrupts are pending */
308	return pic_update_irq(pThis);
309	}
310	}
311	else
312	{
313	Log(("pic_update_irq: no interrupt is pending!!\n"));
314
315	/* we must clear the interrupt ff flag */
316	pThis->CTX_SUFF(pPicHlp)->pfnClearInterruptFF(pThis->CTX_SUFF(pDevIns));
317	}
318	return VINF_SUCCESS;
319	}
320
321	/**
322	* Set the an IRQ.
323	*
324	* @param pDevIns Device instance of the PICs.
325	* @param iIrq IRQ number to set.
326	* @param iLevel IRQ level.
327	* @param uTagSrc The IRQ tag and source ID (for tracing).
328	*/
329	PDMBOTHCBDECL(void) picSetIrq(PPDMDEVINS pDevIns, int iIrq, int iLevel, uint32_t uTagSrc)
330	{
331	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
332	Assert(pThis->CTX_SUFF(pDevIns) == pDevIns);
333	Assert(pThis->aPics[0].CTX_SUFF(pDevIns) == pDevIns);
334	Assert(pThis->aPics[1].CTX_SUFF(pDevIns) == pDevIns);
335	AssertMsg(iIrq < 16, ("iIrq=%d\n", iIrq));
336
337	Log(("picSetIrq %d %d\n", iIrq, iLevel));
338	DumpPICState(&pThis->aPics[0], "picSetIrq");
339	DumpPICState(&pThis->aPics[1], "picSetIrq");
340	STAM_COUNTER_INC(&pThis->CTXSUFF(StatSetIrq));
341	if ((iLevel & PDM_IRQ_LEVEL_FLIP_FLOP) == PDM_IRQ_LEVEL_FLIP_FLOP)
342	{
343	/* A flip-flop lowers the IRQ line and immediately raises it, so
344	* that a rising edge is guaranteed to occur. Note that the IRQ
345	* line must be held high for a while to avoid spurious interrupts.
346	*/
347	pic_set_irq1(&pThis->aPics[iIrq >> 3], iIrq & 7, 0, uTagSrc);
348	pic_update_irq(pThis);
349	}
350	pic_set_irq1(&pThis->aPics[iIrq >> 3], iIrq & 7, iLevel & PDM_IRQ_LEVEL_HIGH, uTagSrc);
351	pic_update_irq(pThis);
352	}
353
354
355	/* acknowledge interrupt 'irq' */
356	DECLINLINE(void) pic_intack(PPICSTATE pPic, int irq)
357	{
358	if (pPic->auto_eoi)
359	{
360	if (pPic->rotate_on_auto_eoi)
361	pPic->priority_add = (irq + 1) & 7;
362	}
363	else
364	pPic->isr \|= (1 << irq);
365
366	/* We don't clear a level sensitive interrupt here */
367	if (!(pPic->elcr & (1 << irq)))
368	{
369	Log2(("pic_intack: irr=%x irrnew=%x\n", pPic->irr, pPic->irr & ~(1 << irq)));
370	pPic->irr &= ~(1 << irq);
371	}
372	}
373
374
375	/**
376	* Get a pending interrupt.
377	*
378	* @returns Pending interrupt number.
379	* @param pDevIns Device instance of the PICs.
380	* @param puTagSrc Where to return the IRQ tag and source ID.
381	*/
382	PDMBOTHCBDECL(int) picGetInterrupt(PPDMDEVINS pDevIns, uint32_t *puTagSrc)
383	{
384	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
385	int irq;
386	int irq2;
387	int intno;
388
389	/* read the irq from the PIC */
390	DumpPICState(&pThis->aPics[0], "picGetInterrupt");
391	DumpPICState(&pThis->aPics[1], "picGetInterrupt");
392
393	irq = pic_get_irq(&pThis->aPics[0]);
394	if (irq >= 0)
395	{
396	pic_intack(&pThis->aPics[0], irq);
397	if (irq == 2)
398	{
399	irq2 = pic_get_irq(&pThis->aPics[1]);
400	if (irq2 >= 0)
401	pic_intack(&pThis->aPics[1], irq2);
402	else
403	{
404	/* Interrupt went away or is now masked. */
405	Log(("picGetInterrupt: spurious IRQ on slave controller, converted to IRQ15\n"));
406	irq2 = 7;
407	}
408	intno = pThis->aPics[1].irq_base + irq2;
409	*puTagSrc = pThis->aPics[0].auTags[irq2];
410	pThis->aPics[0].auTags[irq2] = 0;
411	Log2(("picGetInterrupt1: %x base=%x irq=%x uTagSrc=%#x\n", intno, pThis->aPics[1].irq_base, irq2, *puTagSrc));
412	irq = irq2 + 8;
413	}
414	else
415	{
416	intno = pThis->aPics[0].irq_base + irq;
417	*puTagSrc = pThis->aPics[0].auTags[irq];
418	pThis->aPics[0].auTags[irq] = 0;
419	Log2(("picGetInterrupt0: %x base=%x irq=%x uTagSrc=%#x\n", intno, pThis->aPics[0].irq_base, irq, *puTagSrc));
420	}
421	}
422	else
423	{
424	/* Interrupt went away or is now masked. */
425	Log(("picGetInterrupt: spurious IRQ on master controller, converted to IRQ7\n"));
426	irq = 7;
427	intno = pThis->aPics[0].irq_base + irq;
428	*puTagSrc = 0;
429	}
430	pic_update_irq(pThis);
431
432	Log(("picGetInterrupt: 0x%02x pending 0:%d 1:%d\n", intno, pic_get_irq(&pThis->aPics[0]), pic_get_irq(&pThis->aPics[1])));
433
434	return intno;
435	}
436
437	static void pic_reset(PPICSTATE pPic)
438	{
439	PPDMDEVINSR3 pDevInsR3 = pPic->pDevInsR3;
440	PPDMDEVINSR0 pDevInsR0 = pPic->pDevInsR0;
441	PPDMDEVINSRC pDevInsRC = pPic->pDevInsRC;
442	int elcr_mask = pPic->elcr_mask;
443	int elcr = pPic->elcr;
444
445	memset(pPic, 0, sizeof(*pPic));
446
447	pPic->elcr = elcr;
448	pPic->elcr_mask = elcr_mask;
449	pPic->pDevInsRC = pDevInsRC;
450	pPic->pDevInsR0 = pDevInsR0;
451	pPic->pDevInsR3 = pDevInsR3;
452	}
453
454
455	static int pic_ioport_write(PDEVPIC pThis, PPICSTATE pPic, uint32_t addr, uint32_t val)
456	{
457	int rc = VINF_SUCCESS;
458	int irq;
459
460	Log(("pic_write: addr=0x%02x val=0x%02x\n", addr, val));
461	addr &= 1;
462	if (addr == 0)
463	{
464	if (val & 0x10)
465	{
466	/* init */
467	pic_reset(pPic);
468	/* deassert a pending interrupt */
469	pThis->CTX_SUFF(pPicHlp)->pfnClearInterruptFF(pThis->CTX_SUFF(pDevIns));
470
471	pPic->init_state = 1;
472	pPic->init4 = val & 1;
473	if (val & 0x02)
474	AssertReleaseMsgFailed(("single mode not supported"));
475	if (val & 0x08)
476	if (pThis->cRelLogEntries++ < 64)
477	LogRel(("pic_write: Level sensitive IRQ setting ignored.\n"));
478	}
479	else if (val & 0x08)
480	{
481	if (val & 0x04)
482	pPic->poll = 1;
483	if (val & 0x02)
484	pPic->read_reg_select = val & 1;
485	if (val & 0x40)
486	pPic->special_mask = (val >> 5) & 1;
487	}
488	else
489	{
490	int cmd = val >> 5;
491	switch (cmd)
492	{
493	case 0:
494	case 4:
495	pPic->rotate_on_auto_eoi = cmd >> 2;
496	break;
497	case 1: /* end of interrupt */
498	case 5:
499	{
500	int priority = get_priority(pPic, pPic->isr);
501	if (priority != 8) {
502	irq = (priority + pPic->priority_add) & 7;
503	Log(("pic_write: EOI prio=%d irq=%d\n", priority, irq));
504	pPic->isr &= ~(1 << irq);
505	if (cmd == 5)
506	pPic->priority_add = (irq + 1) & 7;
507	rc = pic_update_irq(pThis);
508	Assert(rc == VINF_SUCCESS);
509	DumpPICState(pPic, "eoi");
510	}
511	break;
512	}
513	case 3:
514	{
515	irq = val & 7;
516	Log(("pic_write: EOI2 for irq %d\n", irq));
517	pPic->isr &= ~(1 << irq);
518	rc = pic_update_irq(pThis);
519	Assert(rc == VINF_SUCCESS);
520	DumpPICState(pPic, "eoi2");
521	break;
522	}
523	case 6:
524	{
525	pPic->priority_add = (val + 1) & 7;
526	Log(("pic_write: lowest priority %d (highest %d)\n", val & 7, pPic->priority_add));
527	rc = pic_update_irq(pThis);
528	Assert(rc == VINF_SUCCESS);
529	break;
530	}
531	case 7:
532	{
533	irq = val & 7;
534	Log(("pic_write: EOI3 for irq %d\n", irq));
535	pPic->isr &= ~(1 << irq);
536	pPic->priority_add = (irq + 1) & 7;
537	rc = pic_update_irq(pThis);
538	Assert(rc == VINF_SUCCESS);
539	DumpPICState(pPic, "eoi3");
540	break;
541	}
542	default:
543	/* no operation */
544	break;
545	}
546	}
547	}
548	else
549	{
550	switch (pPic->init_state)
551	{
552	case 0:
553	/* normal mode */
554	pPic->imr = val;
555	rc = pic_update_irq(pThis);
556	Assert(rc == VINF_SUCCESS);
557	break;
558	case 1:
559	pPic->irq_base = val & 0xf8;
560	pPic->init_state = 2;
561	Log(("pic_write: set irq base to %x\n", pPic->irq_base));
562	break;
563	case 2:
564	if (pPic->init4)
565	pPic->init_state = 3;
566	else
567	pPic->init_state = 0;
568	break;
569	case 3:
570	pPic->special_fully_nested_mode = (val >> 4) & 1;
571	pPic->auto_eoi = (val >> 1) & 1;
572	pPic->init_state = 0;
573	Log(("pic_write: special_fully_nested_mode=%d auto_eoi=%d\n", pPic->special_fully_nested_mode, pPic->auto_eoi));
574	break;
575	}
576	}
577	return rc;
578	}
579
580
581	static uint32_t pic_poll_read(PPICSTATE pPic, uint32_t addr1)
582	{
583	PDEVPIC pThis = RT_FROM_MEMBER_DYN(pPic, DEVPIC, aPics[pPic->idxPic]);
584
585	int ret = pic_get_irq(pPic);
586	if (ret >= 0)
587	{
588	if (addr1 >> 7)
589	{
590	Log2(("pic_poll_read: clear slave irq (isr)\n"));
591	pThis->aPics[0].isr &= ~(1 << 2);
592	pThis->aPics[0].irr &= ~(1 << 2);
593	}
594	Log2(("pic_poll_read: clear irq %d (isr)\n", ret));
595	pPic->irr &= ~(1 << ret);
596	pPic->isr &= ~(1 << ret);
597	if (addr1 >> 7 \|\| ret != 2)
598	pic_update_irq(pThis);
599	}
600	else
601	{
602	ret = 0;
603	pic_update_irq(pThis);
604	}
605
606	return ret;
607	}
608
609
610	static uint32_t pic_ioport_read(PPICSTATE pPic, uint32_t addr1, int *pRC)
611	{
612	unsigned int addr;
613	int ret;
614
615	*pRC = VINF_SUCCESS;
616
617	addr = addr1;
618	addr &= 1;
619	if (pPic->poll)
620	{
621	ret = pic_poll_read(pPic, addr1);
622	pPic->poll = 0;
623	}
624	else
625	{
626	if (addr == 0)
627	{
628	if (pPic->read_reg_select)
629	ret = pPic->isr;
630	else
631	ret = pPic->irr;
632	}
633	else
634	ret = pPic->imr;
635	}
636	Log(("pic_read: addr=0x%02x val=0x%02x\n", addr1, ret));
637	return ret;
638	}
639
640
641
642	/* -=-=-=-=-=- I/O ports -=-=-=-=-=- */
643
644	/**
645	* @callback_method_impl{FNIOMIOPORTIN}
646	*/
647	PDMBOTHCBDECL(int) picIOPortRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT uPort, uint32_t pu32, unsigned cb)
648	{
649	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
650	uint32_t iPic = (uint32_t)(uintptr_t)pvUser;
651
652	Assert(iPic == 0 \|\| iPic == 1);
653	if (cb == 1)
654	{
655	int rc;
656	PIC_LOCK(pThis, VINF_IOM_R3_IOPORT_READ);
657	*pu32 = pic_ioport_read(&pThis->aPics[iPic], uPort, &rc);
658	PIC_UNLOCK(pThis);
659	return rc;
660	}
661	return VERR_IOM_IOPORT_UNUSED;
662	}
663
664
665	/**
666	* @callback_method_impl{FNIOMIOPORTOUT}
667	*/
668	PDMBOTHCBDECL(int) picIOPortWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT uPort, uint32_t u32, unsigned cb)
669	{
670	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
671	uint32_t iPic = (uint32_t)(uintptr_t)pvUser;
672
673	Assert(iPic == 0 \|\| iPic == 1);
674
675	if (cb == 1)
676	{
677	int rc;
678	PIC_LOCK(pThis, VINF_IOM_R3_IOPORT_WRITE);
679	rc = pic_ioport_write(pThis, &pThis->aPics[iPic], uPort, u32);
680	PIC_UNLOCK(pThis);
681	return rc;
682	}
683	return VINF_SUCCESS;
684	}
685
686
687	/**
688	* @callback_method_impl{FNIOMIOPORTIN, ELCR}
689	*/
690	PDMBOTHCBDECL(int) picIOPortElcrRead(PPDMDEVINS pDevIns, void pvUser, RTIOPORT Port, uint32_t pu32, unsigned cb)
691	{
692	if (cb == 1)
693	{
694	PPICSTATE pPic = (PPICSTATE)pvUser;
695	PIC_LOCK(PDMINS_2_DATA(pDevIns, PDEVPIC), VINF_IOM_R3_IOPORT_READ);
696	*pu32 = pPic->elcr;
697	PIC_UNLOCK(PDMINS_2_DATA(pDevIns, PDEVPIC));
698	return VINF_SUCCESS;
699	}
700	NOREF(Port);
701	return VERR_IOM_IOPORT_UNUSED;
702	}
703
704
705	/**
706	* @callback_method_impl{FNIOMIOPORTOUT, ELCR}
707	*/
708	PDMBOTHCBDECL(int) picIOPortElcrWrite(PPDMDEVINS pDevIns, void *pvUser, RTIOPORT Port, uint32_t u32, unsigned cb)
709	{
710	if (cb == 1)
711	{
712	PPICSTATE pPic = (PPICSTATE)pvUser;
713	PIC_LOCK(PDMINS_2_DATA(pDevIns, PDEVPIC), VINF_IOM_R3_IOPORT_WRITE);
714	pPic->elcr = u32 & pPic->elcr_mask;
715	PIC_UNLOCK(PDMINS_2_DATA(pDevIns, PDEVPIC));
716	}
717	NOREF(Port);
718	return VINF_SUCCESS;
719	}
720
721
722	#ifdef IN_RING3
723
724	/**
725	* @callback_method_impl{FNDBGFHANDLERDEV}
726	*/
727	static DECLCALLBACK(void) picInfo(PPDMDEVINS pDevIns, PCDBGFINFOHLP pHlp, const char *pszArgs)
728	{
729	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
730	NOREF(pszArgs);
731
732	/*
733	* Show info.
734	*/
735	for (int i = 0; i < 2; i++)
736	{
737	PPICSTATE pPic = &pThis->aPics[i];
738
739	pHlp->pfnPrintf(pHlp, "PIC%d:\n", i);
740	pHlp->pfnPrintf(pHlp, " IMR :%02x ISR :%02x IRR :%02x LIRR:%02x\n",
741	pPic->imr, pPic->isr, pPic->irr, pPic->last_irr);
742	pHlp->pfnPrintf(pHlp, " Base:%02x PriAdd:%02x RegSel:%02x\n",
743	pPic->irq_base, pPic->priority_add, pPic->read_reg_select);
744	pHlp->pfnPrintf(pHlp, " Poll:%02x SpMask:%02x IState:%02x\n",
745	pPic->poll, pPic->special_mask, pPic->init_state);
746	pHlp->pfnPrintf(pHlp, " AEOI:%02x Rotate:%02x FNest :%02x Ini4:%02x\n",
747	pPic->auto_eoi, pPic->rotate_on_auto_eoi,
748	pPic->special_fully_nested_mode, pPic->init4);
749	pHlp->pfnPrintf(pHlp, " ELCR:%02x ELMask:%02x\n", pPic->elcr, pPic->elcr_mask);
750	}
751	}
752
753
754	/* -=-=-=-=-=- Saved State -=-=-=-=-=- */
755
756	/**
757	* @callback_method_impl{FNSSMDEVSAVEEXEC}
758	*/
759	static DECLCALLBACK(int) picSaveExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM)
760	{
761	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
762	for (unsigned i = 0; i < RT_ELEMENTS(pThis->aPics); i++)
763	{
764	SSMR3PutU8(pSSM, pThis->aPics[i].last_irr);
765	SSMR3PutU8(pSSM, pThis->aPics[i].irr);
766	SSMR3PutU8(pSSM, pThis->aPics[i].imr);
767	SSMR3PutU8(pSSM, pThis->aPics[i].isr);
768	SSMR3PutU8(pSSM, pThis->aPics[i].priority_add);
769	SSMR3PutU8(pSSM, pThis->aPics[i].irq_base);
770	SSMR3PutU8(pSSM, pThis->aPics[i].read_reg_select);
771	SSMR3PutU8(pSSM, pThis->aPics[i].poll);
772	SSMR3PutU8(pSSM, pThis->aPics[i].special_mask);
773	SSMR3PutU8(pSSM, pThis->aPics[i].init_state);
774	SSMR3PutU8(pSSM, pThis->aPics[i].auto_eoi);
775	SSMR3PutU8(pSSM, pThis->aPics[i].rotate_on_auto_eoi);
776	SSMR3PutU8(pSSM, pThis->aPics[i].special_fully_nested_mode);
777	SSMR3PutU8(pSSM, pThis->aPics[i].init4);
778	SSMR3PutU8(pSSM, pThis->aPics[i].elcr);
779	}
780	return VINF_SUCCESS;
781	}
782
783
784	/**
785	* @callback_method_impl{FNSSMDEVLOADEXEC}
786	*/
787	static DECLCALLBACK(int) picLoadExec(PPDMDEVINS pDevIns, PSSMHANDLE pSSM, uint32_t uVersion, uint32_t uPass)
788	{
789	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
790
791	if (uVersion != 1)
792	return VERR_SSM_UNSUPPORTED_DATA_UNIT_VERSION;
793	Assert(uPass == SSM_PASS_FINAL); NOREF(uPass);
794
795	for (unsigned i = 0; i < RT_ELEMENTS(pThis->aPics); i++)
796	{
797	SSMR3GetU8(pSSM, &pThis->aPics[i].last_irr);
798	SSMR3GetU8(pSSM, &pThis->aPics[i].irr);
799	SSMR3GetU8(pSSM, &pThis->aPics[i].imr);
800	SSMR3GetU8(pSSM, &pThis->aPics[i].isr);
801	SSMR3GetU8(pSSM, &pThis->aPics[i].priority_add);
802	SSMR3GetU8(pSSM, &pThis->aPics[i].irq_base);
803	SSMR3GetU8(pSSM, &pThis->aPics[i].read_reg_select);
804	SSMR3GetU8(pSSM, &pThis->aPics[i].poll);
805	SSMR3GetU8(pSSM, &pThis->aPics[i].special_mask);
806	SSMR3GetU8(pSSM, &pThis->aPics[i].init_state);
807	SSMR3GetU8(pSSM, &pThis->aPics[i].auto_eoi);
808	SSMR3GetU8(pSSM, &pThis->aPics[i].rotate_on_auto_eoi);
809	SSMR3GetU8(pSSM, &pThis->aPics[i].special_fully_nested_mode);
810	SSMR3GetU8(pSSM, &pThis->aPics[i].init4);
811	SSMR3GetU8(pSSM, &pThis->aPics[i].elcr);
812	}
813	return VINF_SUCCESS;
814	}
815
816
817	/* -=-=-=-=-=- PDMDEVREG -=-=-=-=-=- */
818
819	/**
820	* @interface_method_impl{PDMDEVREG,pfnReset}
821	*/
822	static DECLCALLBACK(void) picReset(PPDMDEVINS pDevIns)
823	{
824	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
825	unsigned i;
826	LogFlow(("picReset:\n"));
827	pThis->pPicHlpR3->pfnLock(pDevIns, VERR_INTERNAL_ERROR);
828
829	for (i = 0; i < RT_ELEMENTS(pThis->aPics); i++)
830	pic_reset(&pThis->aPics[i]);
831
832	PIC_UNLOCK(pThis);
833	}
834
835
836	/**
837	* @interface_method_impl{PDMDEVREG,pfnRelocate}
838	*/
839	static DECLCALLBACK(void) picRelocate(PPDMDEVINS pDevIns, RTGCINTPTR offDelta)
840	{
841	RT_NOREF1(offDelta);
842	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
843	unsigned i;
844
845	pThis->pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
846	pThis->pPicHlpRC = pThis->pPicHlpR3->pfnGetRCHelpers(pDevIns);
847	for (i = 0; i < RT_ELEMENTS(pThis->aPics); i++)
848	pThis->aPics[i].pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
849	}
850
851
852	/**
853	* @interface_method_impl{PDMDEVREG,pfnConstruct}
854	*/
855	static DECLCALLBACK(int) picConstruct(PPDMDEVINS pDevIns, int iInstance, PCFGMNODE pCfg)
856	{
857	PDMDEV_CHECK_VERSIONS_RETURN(pDevIns);
858	RT_NOREF1(iInstance);
859	PDEVPIC pThis = PDMINS_2_DATA(pDevIns, PDEVPIC);
860	int rc;
861	bool fGCEnabled;
862	bool fR0Enabled;
863	Assert(iInstance == 0);
864
865	/*
866	* Validate and read configuration.
867	*/
868	if (!CFGMR3AreValuesValid(pCfg, "GCEnabled\0" "R0Enabled\0"))
869	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
870
871	rc = CFGMR3QueryBoolDef(pCfg, "GCEnabled", &fGCEnabled, true);
872	if (RT_FAILURE(rc))
873	return PDMDEV_SET_ERROR(pDevIns, rc,
874	N_("Configuration error: failed to read GCEnabled as boolean"));
875
876	rc = CFGMR3QueryBoolDef(pCfg, "R0Enabled", &fR0Enabled, true);
877	if (RT_FAILURE(rc))
878	return PDMDEV_SET_ERROR(pDevIns, rc,
879	N_("Configuration error: failed to read R0Enabled as boolean"));
880
881	Log(("DevPIC: fGCEnabled=%RTbool fR0Enabled=%RTbool\n", fGCEnabled, fR0Enabled));
882
883	/*
884	* Init the data.
885	*/
886	Assert(RT_ELEMENTS(pThis->aPics) == 2);
887	pThis->pDevInsR3 = pDevIns;
888	pThis->pDevInsR0 = PDMDEVINS_2_R0PTR(pDevIns);
889	pThis->pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
890	pThis->aPics[0].elcr_mask = 0xf8;
891	pThis->aPics[1].elcr_mask = 0xde;
892	pThis->aPics[0].pDevInsR3 = pDevIns;
893	pThis->aPics[1].pDevInsR3 = pDevIns;
894	pThis->aPics[0].pDevInsR0 = PDMDEVINS_2_R0PTR(pDevIns);
895	pThis->aPics[1].pDevInsR0 = PDMDEVINS_2_R0PTR(pDevIns);
896	pThis->aPics[0].pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
897	pThis->aPics[1].pDevInsRC = PDMDEVINS_2_RCPTR(pDevIns);
898	pThis->aPics[0].idxPic = 0;
899	pThis->aPics[1].idxPic = 1;
900	pThis->cRelLogEntries = 0;
901
902	/*
903	* Register us as the PIC with PDM.
904	*/
905	PDMPICREG PicReg;
906	PicReg.u32Version = PDM_PICREG_VERSION;
907	PicReg.pfnSetIrqR3 = picSetIrq;
908	PicReg.pfnGetInterruptR3 = picGetInterrupt;
909
910	if (fGCEnabled)
911	{
912	PicReg.pszSetIrqRC = "picSetIrq";
913	PicReg.pszGetInterruptRC = "picGetInterrupt";
914	}
915	else
916	{
917	PicReg.pszSetIrqRC = NULL;
918	PicReg.pszGetInterruptRC = NULL;
919	}
920
921	if (fR0Enabled)
922	{
923	PicReg.pszSetIrqR0 = "picSetIrq";
924	PicReg.pszGetInterruptR0 = "picGetInterrupt";
925	}
926	else
927	{
928	PicReg.pszSetIrqR0 = NULL;
929	PicReg.pszGetInterruptR0 = NULL;
930	}
931
932	rc = PDMDevHlpPICRegister(pDevIns, &PicReg, &pThis->pPicHlpR3);
933	AssertLogRelMsgRCReturn(rc, ("PICRegister -> %Rrc\n", rc), rc);
934	if (fGCEnabled)
935	pThis->pPicHlpRC = pThis->pPicHlpR3->pfnGetRCHelpers(pDevIns);
936	if (fR0Enabled)
937	pThis->pPicHlpR0 = pThis->pPicHlpR3->pfnGetR0Helpers(pDevIns);
938
939	/*
940	* Since the PIC helper interface provides access to the PDM lock,
941	* we need no device level critical section.
942	*/
943	rc = PDMDevHlpSetDeviceCritSect(pDevIns, PDMDevHlpCritSectGetNop(pDevIns));
944	AssertRCReturn(rc, rc);
945
946	/*
947	* Register I/O ports and save state.
948	*/
949	rc = PDMDevHlpIOPortRegister(pDevIns, 0x20, 2, (void *)0, picIOPortWrite, picIOPortRead, NULL, NULL, "i8259 PIC #0");
950	if (RT_FAILURE(rc))
951	return rc;
952	rc = PDMDevHlpIOPortRegister(pDevIns, 0xa0, 2, (void *)1, picIOPortWrite, picIOPortRead, NULL, NULL, "i8259 PIC #1");
953	if (RT_FAILURE(rc))
954	return rc;
955	if (fGCEnabled)
956	{
957	rc = PDMDevHlpIOPortRegisterRC(pDevIns, 0x20, 2, 0, "picIOPortWrite", "picIOPortRead", NULL, NULL, "i8259 PIC #0");
958	if (RT_FAILURE(rc))
959	return rc;
960	rc = PDMDevHlpIOPortRegisterRC(pDevIns, 0xa0, 2, 1, "picIOPortWrite", "picIOPortRead", NULL, NULL, "i8259 PIC #1");
961	if (RT_FAILURE(rc))
962	return rc;
963	}
964	if (fR0Enabled)
965	{
966	rc = PDMDevHlpIOPortRegisterR0(pDevIns, 0x20, 2, 0, "picIOPortWrite", "picIOPortRead", NULL, NULL, "i8259 PIC #0");
967	if (RT_FAILURE(rc))
968	return rc;
969	rc = PDMDevHlpIOPortRegisterR0(pDevIns, 0xa0, 2, 1, "picIOPortWrite", "picIOPortRead", NULL, NULL, "i8259 PIC #1");
970	if (RT_FAILURE(rc))
971	return rc;
972	}
973
974	rc = PDMDevHlpIOPortRegister(pDevIns, 0x4d0, 1, &pThis->aPics[0],
975	picIOPortElcrWrite, picIOPortElcrRead, NULL, NULL, "i8259 PIC #0 - elcr");
976	if (RT_FAILURE(rc))
977	return rc;
978	rc = PDMDevHlpIOPortRegister(pDevIns, 0x4d1, 1, &pThis->aPics[1],
979	picIOPortElcrWrite, picIOPortElcrRead, NULL, NULL, "i8259 PIC #1 - elcr");
980	if (RT_FAILURE(rc))
981	return rc;
982	if (fGCEnabled)
983	{
984	RTRCPTR pDataRC = PDMINS_2_DATA_RCPTR(pDevIns);
985	rc = PDMDevHlpIOPortRegisterRC(pDevIns, 0x4d0, 1, pDataRC + RT_OFFSETOF(DEVPIC, aPics[0]),
986	"picIOPortElcrWrite", "picIOPortElcrRead", NULL, NULL, "i8259 PIC #0 - elcr");
987	if (RT_FAILURE(rc))
988	return rc;
989	rc = PDMDevHlpIOPortRegisterRC(pDevIns, 0x4d1, 1, pDataRC + RT_OFFSETOF(DEVPIC, aPics[1]),
990	"picIOPortElcrWrite", "picIOPortElcrRead", NULL, NULL, "i8259 PIC #1 - elcr");
991	if (RT_FAILURE(rc))
992	return rc;
993	}
994	if (fR0Enabled)
995	{
996	RTR0PTR pDataR0 = PDMINS_2_DATA_R0PTR(pDevIns);
997	rc = PDMDevHlpIOPortRegisterR0(pDevIns, 0x4d0, 1, pDataR0 + RT_OFFSETOF(DEVPIC, aPics[0]),
998	"picIOPortElcrWrite", "picIOPortElcrRead", NULL, NULL, "i8259 PIC #0 - elcr");
999	if (RT_FAILURE(rc))
1000	return rc;
1001	rc = PDMDevHlpIOPortRegisterR0(pDevIns, 0x4d1, 1, pDataR0 + RT_OFFSETOF(DEVPIC, aPics[1]),
1002	"picIOPortElcrWrite", "picIOPortElcrRead", NULL, NULL, "i8259 PIC #1 - elcr");
1003	if (RT_FAILURE(rc))
1004	return rc;
1005	}
1006
1007	rc = PDMDevHlpSSMRegister(pDevIns, 1 /* uVersion /, sizeof(pThis), picSaveExec, picLoadExec);
1008	if (RT_FAILURE(rc))
1009	return rc;
1010
1011
1012	/*
1013	* Register the info item.
1014	*/
1015	PDMDevHlpDBGFInfoRegister(pDevIns, "pic", "PIC info.", picInfo);
1016
1017	/*
1018	* Initialize the device state.
1019	*/
1020	picReset(pDevIns);
1021
1022	#ifdef VBOX_WITH_STATISTICS
1023	/*
1024	* Statistics.
1025	*/
1026	PDMDevHlpSTAMRegister(pDevIns, &pThis->StatSetIrqGC, STAMTYPE_COUNTER, "/Devices/PIC/SetIrqGC", STAMUNIT_OCCURENCES, "Number of PIC SetIrq calls in GC.");
1027	PDMDevHlpSTAMRegister(pDevIns, &pThis->StatSetIrqHC, STAMTYPE_COUNTER, "/Devices/PIC/SetIrqHC", STAMUNIT_OCCURENCES, "Number of PIC SetIrq calls in HC.");
1028
1029	PDMDevHlpSTAMRegister(pDevIns, &pThis->StatClearedActiveIRQ2, STAMTYPE_COUNTER, "/Devices/PIC/Masked/ActiveIRQ2", STAMUNIT_OCCURENCES, "Number of cleared irq 2.");
1030	PDMDevHlpSTAMRegister(pDevIns, &pThis->StatClearedActiveMasterIRQ, STAMTYPE_COUNTER, "/Devices/PIC/Masked/ActiveMaster", STAMUNIT_OCCURENCES, "Number of cleared master irqs.");
1031	PDMDevHlpSTAMRegister(pDevIns, &pThis->StatClearedActiveSlaveIRQ, STAMTYPE_COUNTER, "/Devices/PIC/Masked/ActiveSlave", STAMUNIT_OCCURENCES, "Number of cleared slave irqs.");
1032	#endif
1033
1034	return VINF_SUCCESS;
1035	}
1036
1037
1038	/**
1039	* The device registration structure.
1040	*/
1041	const PDMDEVREG g_DeviceI8259 =
1042	{
1043	/* u32Version */
1044	PDM_DEVREG_VERSION,
1045	/* szName */
1046	"i8259",
1047	/* szRCMod */
1048	"VBoxDDRC.rc",
1049	/* szR0Mod */
1050	"VBoxDDR0.r0",
1051	/* pszDescription */
1052	"Intel 8259 Programmable Interrupt Controller (PIC) Device.",
1053	/* fFlags */
1054	PDM_DEVREG_FLAGS_HOST_BITS_DEFAULT \| PDM_DEVREG_FLAGS_GUEST_BITS_32_64 \| PDM_DEVREG_FLAGS_PAE36 \| PDM_DEVREG_FLAGS_RC \| PDM_DEVREG_FLAGS_R0,
1055	/* fClass */
1056	PDM_DEVREG_CLASS_PIC,
1057	/* cMaxInstances */
1058	1,
1059	/* cbInstance */
1060	sizeof(DEVPIC),
1061	/* pfnConstruct */
1062	picConstruct,
1063	/* pfnDestruct */
1064	NULL,
1065	/* pfnRelocate */
1066	picRelocate,
1067	/* pfnMemSetup */
1068	NULL,
1069	/* pfnPowerOn */
1070	NULL,
1071	/* pfnReset */
1072	picReset,
1073	/* pfnSuspend */
1074	NULL,
1075	/* pfnResume */
1076	NULL,
1077	/* pfnAttach */
1078	NULL,
1079	/* pfnDetach */
1080	NULL,
1081	/* pfnQueryInterface. */
1082	NULL,
1083	/* pfnInitComplete */
1084	NULL,
1085	/* pfnPowerOff */
1086	NULL,
1087	/* pfnSoftReset */
1088	NULL,
1089	/* u32VersionEnd */
1090	PDM_DEVREG_VERSION
1091	};
1092
1093	#endif /* IN_RING3 */
1094	#endif /* !VBOX_DEVICE_STRUCT_TESTCASE */
1095

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source: vbox/trunk/src/VBox/Devices/PC/DevPIC.cpp@ 78097

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