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dbda808a FB |
1 | /* |
2 | * OpenPIC emulation | |
3 | * | |
4 | * Copyright (c) 2004 Jocelyn Mayer | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | /* | |
25 | * | |
26 | * Based on OpenPic implementations: | |
27 | * - Intel GW80314 I/O compagnion chip developper's manual | |
28 | * - Motorola MPC8245 & MPC8540 user manuals. | |
29 | * - Motorola MCP750 (aka Raven) programmer manual. | |
30 | * - Motorola Harrier programmer manuel | |
31 | * | |
32 | * Serial interrupts, as implemented in Raven chipset are not supported yet. | |
33 | * | |
34 | */ | |
35 | #include "vl.h" | |
36 | ||
611493d9 | 37 | //#define DEBUG_OPENPIC |
dbda808a FB |
38 | |
39 | #ifdef DEBUG_OPENPIC | |
40 | #define DPRINTF(fmt, args...) do { printf(fmt , ##args); } while (0) | |
41 | #else | |
42 | #define DPRINTF(fmt, args...) do { } while (0) | |
43 | #endif | |
44 | #define ERROR(fmr, args...) do { printf("ERROR: " fmr , ##args); } while (0) | |
45 | ||
46 | #define USE_MPCxxx /* Intel model is broken, for now */ | |
47 | ||
48 | #if defined (USE_INTEL_GW80314) | |
49 | /* Intel GW80314 I/O Companion chip */ | |
50 | ||
51 | #define MAX_CPU 4 | |
52 | #define MAX_IRQ 32 | |
53 | #define MAX_DBL 4 | |
54 | #define MAX_MBX 4 | |
55 | #define MAX_TMR 4 | |
56 | #define VECTOR_BITS 8 | |
57 | #define MAX_IPI 0 | |
58 | ||
59 | #define VID (0x00000000) | |
60 | ||
61 | #define OPENPIC_LITTLE_ENDIAN 1 | |
62 | #define OPENPIC_BIG_ENDIAN 0 | |
63 | ||
64 | #elif defined(USE_MPCxxx) | |
65 | ||
66 | #define MAX_CPU 2 | |
67 | #define MAX_IRQ 64 | |
611493d9 | 68 | #define EXT_IRQ 48 |
dbda808a FB |
69 | #define MAX_DBL 0 |
70 | #define MAX_MBX 0 | |
71 | #define MAX_TMR 4 | |
72 | #define VECTOR_BITS 8 | |
73 | #define MAX_IPI 4 | |
74 | #define VID 0x03 /* MPIC version ID */ | |
75 | #define VENI 0x00000000 /* Vendor ID */ | |
76 | ||
77 | enum { | |
78 | IRQ_IPVP = 0, | |
79 | IRQ_IDE, | |
80 | }; | |
81 | ||
82 | #define OPENPIC_LITTLE_ENDIAN 1 | |
83 | #define OPENPIC_BIG_ENDIAN 0 | |
84 | ||
85 | #else | |
86 | #error "Please select which OpenPic implementation is to be emulated" | |
87 | #endif | |
88 | ||
89 | #if (OPENPIC_BIG_ENDIAN && !TARGET_WORDS_BIGENDIAN) || \ | |
90 | (OPENPIC_LITTLE_ENDIAN && TARGET_WORDS_BIGENDIAN) | |
91 | #define OPENPIC_SWAP | |
92 | #endif | |
93 | ||
94 | /* Interrupt definitions */ | |
95 | #define IRQ_FE (EXT_IRQ) /* Internal functional IRQ */ | |
96 | #define IRQ_ERR (EXT_IRQ + 1) /* Error IRQ */ | |
97 | #define IRQ_TIM0 (EXT_IRQ + 2) /* First timer IRQ */ | |
98 | #if MAX_IPI > 0 | |
99 | #define IRQ_IPI0 (IRQ_TIM0 + MAX_TMR) /* First IPI IRQ */ | |
100 | #define IRQ_DBL0 (IRQ_IPI0 + (MAX_CPU * MAX_IPI)) /* First doorbell IRQ */ | |
101 | #else | |
102 | #define IRQ_DBL0 (IRQ_TIM0 + MAX_TMR) /* First doorbell IRQ */ | |
103 | #define IRQ_MBX0 (IRQ_DBL0 + MAX_DBL) /* First mailbox IRQ */ | |
104 | #endif | |
105 | ||
106 | #define BF_WIDTH(_bits_) \ | |
107 | (((_bits_) + (sizeof(uint32_t) * 8) - 1) / (sizeof(uint32_t) * 8)) | |
108 | ||
109 | static inline void set_bit (uint32_t *field, int bit) | |
110 | { | |
111 | field[bit >> 5] |= 1 << (bit & 0x1F); | |
112 | } | |
113 | ||
114 | static inline void reset_bit (uint32_t *field, int bit) | |
115 | { | |
116 | field[bit >> 5] &= ~(1 << (bit & 0x1F)); | |
117 | } | |
118 | ||
119 | static inline int test_bit (uint32_t *field, int bit) | |
120 | { | |
121 | return (field[bit >> 5] & 1 << (bit & 0x1F)) != 0; | |
122 | } | |
123 | ||
124 | enum { | |
125 | IRQ_EXTERNAL = 0x01, | |
126 | IRQ_INTERNAL = 0x02, | |
127 | IRQ_TIMER = 0x04, | |
128 | IRQ_SPECIAL = 0x08, | |
129 | } IRQ_src_type; | |
130 | ||
131 | typedef struct IRQ_queue_t { | |
132 | uint32_t queue[BF_WIDTH(MAX_IRQ)]; | |
133 | int next; | |
134 | int priority; | |
135 | } IRQ_queue_t; | |
136 | ||
137 | typedef struct IRQ_src_t { | |
138 | uint32_t ipvp; /* IRQ vector/priority register */ | |
139 | uint32_t ide; /* IRQ destination register */ | |
140 | int type; | |
141 | int last_cpu; | |
611493d9 | 142 | int pending; /* TRUE if IRQ is pending */ |
dbda808a FB |
143 | } IRQ_src_t; |
144 | ||
145 | enum IPVP_bits { | |
146 | IPVP_MASK = 31, | |
147 | IPVP_ACTIVITY = 30, | |
148 | IPVP_MODE = 29, | |
149 | IPVP_POLARITY = 23, | |
150 | IPVP_SENSE = 22, | |
151 | }; | |
152 | #define IPVP_PRIORITY_MASK (0x1F << 16) | |
611493d9 | 153 | #define IPVP_PRIORITY(_ipvpr_) ((int)(((_ipvpr_) & IPVP_PRIORITY_MASK) >> 16)) |
dbda808a FB |
154 | #define IPVP_VECTOR_MASK ((1 << VECTOR_BITS) - 1) |
155 | #define IPVP_VECTOR(_ipvpr_) ((_ipvpr_) & IPVP_VECTOR_MASK) | |
156 | ||
157 | typedef struct IRQ_dst_t { | |
158 | uint32_t pctp; /* CPU current task priority */ | |
159 | uint32_t pcsr; /* CPU sensitivity register */ | |
160 | IRQ_queue_t raised; | |
161 | IRQ_queue_t servicing; | |
162 | CPUState *env; /* Needed if we did SMP */ | |
163 | } IRQ_dst_t; | |
164 | ||
611493d9 | 165 | struct openpic_t { |
dbda808a | 166 | PCIDevice pci_dev; |
91d848eb | 167 | int mem_index; |
dbda808a FB |
168 | /* Global registers */ |
169 | uint32_t frep; /* Feature reporting register */ | |
170 | uint32_t glbc; /* Global configuration register */ | |
171 | uint32_t micr; /* MPIC interrupt configuration register */ | |
172 | uint32_t veni; /* Vendor identification register */ | |
173 | uint32_t spve; /* Spurious vector register */ | |
174 | uint32_t tifr; /* Timer frequency reporting register */ | |
175 | /* Source registers */ | |
176 | IRQ_src_t src[MAX_IRQ]; | |
177 | /* Local registers per output pin */ | |
178 | IRQ_dst_t dst[MAX_CPU]; | |
179 | int nb_cpus; | |
180 | /* Timer registers */ | |
181 | struct { | |
182 | uint32_t ticc; /* Global timer current count register */ | |
183 | uint32_t tibc; /* Global timer base count register */ | |
184 | } timers[MAX_TMR]; | |
185 | #if MAX_DBL > 0 | |
186 | /* Doorbell registers */ | |
187 | uint32_t dar; /* Doorbell activate register */ | |
188 | struct { | |
189 | uint32_t dmr; /* Doorbell messaging register */ | |
190 | } doorbells[MAX_DBL]; | |
191 | #endif | |
192 | #if MAX_MBX > 0 | |
193 | /* Mailbox registers */ | |
194 | struct { | |
195 | uint32_t mbr; /* Mailbox register */ | |
196 | } mailboxes[MAX_MAILBOXES]; | |
197 | #endif | |
611493d9 | 198 | }; |
dbda808a FB |
199 | |
200 | static inline void IRQ_setbit (IRQ_queue_t *q, int n_IRQ) | |
201 | { | |
202 | set_bit(q->queue, n_IRQ); | |
203 | } | |
204 | ||
205 | static inline void IRQ_resetbit (IRQ_queue_t *q, int n_IRQ) | |
206 | { | |
207 | reset_bit(q->queue, n_IRQ); | |
208 | } | |
209 | ||
210 | static inline int IRQ_testbit (IRQ_queue_t *q, int n_IRQ) | |
211 | { | |
212 | return test_bit(q->queue, n_IRQ); | |
213 | } | |
214 | ||
215 | static void IRQ_check (openpic_t *opp, IRQ_queue_t *q) | |
216 | { | |
217 | int next, i; | |
218 | int priority; | |
219 | ||
220 | next = -1; | |
221 | priority = -1; | |
222 | for (i = 0; i < MAX_IRQ; i++) { | |
223 | if (IRQ_testbit(q, i)) { | |
611493d9 FB |
224 | DPRINTF("IRQ_check: irq %d set ipvp_pr=%d pr=%d\n", |
225 | i, IPVP_PRIORITY(opp->src[i].ipvp), priority); | |
dbda808a FB |
226 | if (IPVP_PRIORITY(opp->src[i].ipvp) > priority) { |
227 | next = i; | |
228 | priority = IPVP_PRIORITY(opp->src[i].ipvp); | |
229 | } | |
230 | } | |
231 | } | |
232 | q->next = next; | |
233 | q->priority = priority; | |
234 | } | |
235 | ||
236 | static int IRQ_get_next (openpic_t *opp, IRQ_queue_t *q) | |
237 | { | |
238 | if (q->next == -1) { | |
611493d9 | 239 | /* XXX: optimize */ |
dbda808a FB |
240 | IRQ_check(opp, q); |
241 | } | |
242 | ||
243 | return q->next; | |
244 | } | |
245 | ||
246 | static void IRQ_local_pipe (openpic_t *opp, int n_CPU, int n_IRQ) | |
247 | { | |
248 | IRQ_dst_t *dst; | |
249 | IRQ_src_t *src; | |
250 | int priority; | |
251 | ||
252 | dst = &opp->dst[n_CPU]; | |
253 | src = &opp->src[n_IRQ]; | |
254 | priority = IPVP_PRIORITY(src->ipvp); | |
255 | if (priority <= dst->pctp) { | |
256 | /* Too low priority */ | |
257 | return; | |
258 | } | |
259 | if (IRQ_testbit(&dst->raised, n_IRQ)) { | |
260 | /* Interrupt miss */ | |
261 | return; | |
262 | } | |
263 | set_bit(&src->ipvp, IPVP_ACTIVITY); | |
264 | IRQ_setbit(&dst->raised, n_IRQ); | |
265 | if (priority > dst->raised.priority) { | |
266 | IRQ_get_next(opp, &dst->raised); | |
267 | DPRINTF("Raise CPU IRQ\n"); | |
268 | cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD); | |
269 | } | |
270 | } | |
271 | ||
611493d9 FB |
272 | /* update pic state because registers for n_IRQ have changed value */ |
273 | static void openpic_update_irq(openpic_t *opp, int n_IRQ) | |
dbda808a FB |
274 | { |
275 | IRQ_src_t *src; | |
276 | int i; | |
277 | ||
278 | src = &opp->src[n_IRQ]; | |
611493d9 FB |
279 | |
280 | if (!src->pending) { | |
281 | /* no irq pending */ | |
282 | return; | |
283 | } | |
284 | if (test_bit(&src->ipvp, IPVP_MASK)) { | |
dbda808a FB |
285 | /* Interrupt source is disabled */ |
286 | return; | |
287 | } | |
288 | if (IPVP_PRIORITY(src->ipvp) == 0) { | |
289 | /* Priority set to zero */ | |
290 | return; | |
291 | } | |
611493d9 FB |
292 | if (test_bit(&src->ipvp, IPVP_ACTIVITY)) { |
293 | /* IRQ already active */ | |
294 | return; | |
295 | } | |
dbda808a FB |
296 | if (src->ide == 0x00000000) { |
297 | /* No target */ | |
298 | return; | |
299 | } | |
611493d9 FB |
300 | |
301 | if (!test_bit(&src->ipvp, IPVP_MODE) || | |
302 | src->ide == (1 << src->last_cpu)) { | |
303 | /* Directed delivery mode */ | |
304 | for (i = 0; i < opp->nb_cpus; i++) { | |
305 | if (test_bit(&src->ide, i)) | |
306 | IRQ_local_pipe(opp, i, n_IRQ); | |
307 | } | |
dbda808a | 308 | } else { |
611493d9 FB |
309 | /* Distributed delivery mode */ |
310 | /* XXX: incorrect code */ | |
311 | for (i = src->last_cpu; i < src->last_cpu; i++) { | |
312 | if (i == MAX_IRQ) | |
313 | i = 0; | |
314 | if (test_bit(&src->ide, i)) { | |
315 | IRQ_local_pipe(opp, i, n_IRQ); | |
316 | src->last_cpu = i; | |
317 | break; | |
318 | } | |
319 | } | |
320 | } | |
321 | } | |
322 | ||
323 | void openpic_set_irq(openpic_t *opp, int n_IRQ, int level) | |
324 | { | |
325 | IRQ_src_t *src; | |
326 | ||
327 | src = &opp->src[n_IRQ]; | |
328 | DPRINTF("openpic: set irq %d = %d ipvp=%08x\n", | |
329 | n_IRQ, level, src->ipvp); | |
330 | if (test_bit(&src->ipvp, IPVP_SENSE)) { | |
331 | /* level-sensitive irq */ | |
332 | src->pending = level; | |
333 | if (!level) | |
334 | reset_bit(&src->ipvp, IPVP_ACTIVITY); | |
335 | } else { | |
336 | /* edge-sensitive irq */ | |
337 | if (level) | |
338 | src->pending = 1; | |
dbda808a | 339 | } |
611493d9 | 340 | openpic_update_irq(opp, n_IRQ); |
dbda808a FB |
341 | } |
342 | ||
343 | static void openpic_reset (openpic_t *opp) | |
344 | { | |
345 | int i; | |
346 | ||
347 | opp->glbc = 0x80000000; | |
348 | /* Initialise controler registers */ | |
349 | opp->frep = ((EXT_IRQ - 1) << 16) | ((MAX_CPU - 1) << 8) | VID; | |
350 | opp->veni = VENI; | |
351 | opp->spve = 0x000000FF; | |
352 | opp->tifr = 0x003F7A00; | |
353 | /* ? */ | |
354 | opp->micr = 0x00000000; | |
355 | /* Initialise IRQ sources */ | |
356 | for (i = 0; i < MAX_IRQ; i++) { | |
357 | opp->src[i].ipvp = 0xA0000000; | |
358 | opp->src[i].ide = 0x00000000; | |
359 | } | |
360 | /* Initialise IRQ destinations */ | |
361 | for (i = 0; i < opp->nb_cpus; i++) { | |
362 | opp->dst[i].pctp = 0x0000000F; | |
363 | opp->dst[i].pcsr = 0x00000000; | |
364 | memset(&opp->dst[i].raised, 0, sizeof(IRQ_queue_t)); | |
365 | memset(&opp->dst[i].servicing, 0, sizeof(IRQ_queue_t)); | |
366 | } | |
367 | /* Initialise timers */ | |
368 | for (i = 0; i < MAX_TMR; i++) { | |
369 | opp->timers[i].ticc = 0x00000000; | |
370 | opp->timers[i].tibc = 0x80000000; | |
371 | } | |
372 | /* Initialise doorbells */ | |
373 | #if MAX_DBL > 0 | |
374 | opp->dar = 0x00000000; | |
375 | for (i = 0; i < MAX_DBL; i++) { | |
376 | opp->doorbells[i].dmr = 0x00000000; | |
377 | } | |
378 | #endif | |
379 | /* Initialise mailboxes */ | |
380 | #if MAX_MBX > 0 | |
381 | for (i = 0; i < MAX_MBX; i++) { /* ? */ | |
382 | opp->mailboxes[i].mbr = 0x00000000; | |
383 | } | |
384 | #endif | |
385 | /* Go out of RESET state */ | |
386 | opp->glbc = 0x00000000; | |
387 | } | |
388 | ||
389 | static inline uint32_t read_IRQreg (openpic_t *opp, int n_IRQ, uint32_t reg) | |
390 | { | |
391 | uint32_t retval; | |
392 | ||
393 | switch (reg) { | |
394 | case IRQ_IPVP: | |
395 | retval = opp->src[n_IRQ].ipvp; | |
396 | break; | |
397 | case IRQ_IDE: | |
398 | retval = opp->src[n_IRQ].ide; | |
399 | break; | |
400 | } | |
401 | ||
402 | return retval; | |
403 | } | |
404 | ||
405 | static inline void write_IRQreg (openpic_t *opp, int n_IRQ, | |
406 | uint32_t reg, uint32_t val) | |
407 | { | |
408 | uint32_t tmp; | |
409 | ||
410 | switch (reg) { | |
411 | case IRQ_IPVP: | |
611493d9 FB |
412 | /* NOTE: not fully accurate for special IRQs, but simple and |
413 | sufficient */ | |
414 | /* ACTIVITY bit is read-only */ | |
415 | opp->src[n_IRQ].ipvp = | |
416 | (opp->src[n_IRQ].ipvp & 0x40000000) | | |
417 | (val & 0x800F00FF); | |
418 | openpic_update_irq(opp, n_IRQ); | |
419 | DPRINTF("Set IPVP %d to 0x%08x -> 0x%08x\n", | |
420 | n_IRQ, val, opp->src[n_IRQ].ipvp); | |
dbda808a FB |
421 | break; |
422 | case IRQ_IDE: | |
423 | tmp = val & 0xC0000000; | |
424 | tmp |= val & ((1 << MAX_CPU) - 1); | |
425 | opp->src[n_IRQ].ide = tmp; | |
426 | DPRINTF("Set IDE %d to 0x%08x\n", n_IRQ, opp->src[n_IRQ].ide); | |
427 | break; | |
428 | } | |
429 | } | |
430 | ||
431 | #if 0 // Code provision for Intel model | |
432 | #if MAX_DBL > 0 | |
433 | static uint32_t read_doorbell_register (openpic_t *opp, | |
434 | int n_dbl, uint32_t offset) | |
435 | { | |
436 | uint32_t retval; | |
437 | ||
438 | switch (offset) { | |
439 | case DBL_IPVP_OFFSET: | |
440 | retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP); | |
441 | break; | |
442 | case DBL_IDE_OFFSET: | |
443 | retval = read_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE); | |
444 | break; | |
445 | case DBL_DMR_OFFSET: | |
446 | retval = opp->doorbells[n_dbl].dmr; | |
447 | break; | |
448 | } | |
449 | ||
450 | return retval; | |
451 | } | |
452 | ||
453 | static void write_doorbell_register (penpic_t *opp, int n_dbl, | |
454 | uint32_t offset, uint32_t value) | |
455 | { | |
456 | switch (offset) { | |
457 | case DBL_IVPR_OFFSET: | |
458 | write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IPVP, value); | |
459 | break; | |
460 | case DBL_IDE_OFFSET: | |
461 | write_IRQreg(opp, IRQ_DBL0 + n_dbl, IRQ_IDE, value); | |
462 | break; | |
463 | case DBL_DMR_OFFSET: | |
464 | opp->doorbells[n_dbl].dmr = value; | |
465 | break; | |
466 | } | |
467 | } | |
468 | #endif | |
469 | ||
470 | #if MAX_MBX > 0 | |
471 | static uint32_t read_mailbox_register (openpic_t *opp, | |
472 | int n_mbx, uint32_t offset) | |
473 | { | |
474 | uint32_t retval; | |
475 | ||
476 | switch (offset) { | |
477 | case MBX_MBR_OFFSET: | |
478 | retval = opp->mailboxes[n_mbx].mbr; | |
479 | break; | |
480 | case MBX_IVPR_OFFSET: | |
481 | retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP); | |
482 | break; | |
483 | case MBX_DMR_OFFSET: | |
484 | retval = read_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE); | |
485 | break; | |
486 | } | |
487 | ||
488 | return retval; | |
489 | } | |
490 | ||
491 | static void write_mailbox_register (openpic_t *opp, int n_mbx, | |
492 | uint32_t address, uint32_t value) | |
493 | { | |
494 | switch (offset) { | |
495 | case MBX_MBR_OFFSET: | |
496 | opp->mailboxes[n_mbx].mbr = value; | |
497 | break; | |
498 | case MBX_IVPR_OFFSET: | |
499 | write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IPVP, value); | |
500 | break; | |
501 | case MBX_DMR_OFFSET: | |
502 | write_IRQreg(opp, IRQ_MBX0 + n_mbx, IRQ_IDE, value); | |
503 | break; | |
504 | } | |
505 | } | |
506 | #endif | |
507 | #endif /* 0 : Code provision for Intel model */ | |
508 | ||
509 | static void openpic_gbl_write (void *opaque, uint32_t addr, uint32_t val) | |
510 | { | |
511 | openpic_t *opp = opaque; | |
512 | ||
513 | DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val); | |
514 | if (addr & 0xF) | |
515 | return; | |
516 | #if defined OPENPIC_SWAP | |
517 | val = bswap32(val); | |
518 | #endif | |
519 | addr &= 0xFF; | |
520 | switch (addr) { | |
521 | case 0x00: /* FREP */ | |
522 | break; | |
523 | case 0x20: /* GLBC */ | |
524 | if (val & 0x80000000) | |
525 | openpic_reset(opp); | |
526 | opp->glbc = val & ~0x80000000; | |
527 | break; | |
528 | case 0x80: /* VENI */ | |
529 | break; | |
530 | case 0x90: /* PINT */ | |
531 | /* XXX: Should be able to reset any CPU */ | |
532 | if (val & 1) { | |
533 | DPRINTF("Reset CPU IRQ\n"); | |
534 | // cpu_interrupt(cpu_single_env, CPU_INTERRUPT_RESET); | |
535 | } | |
536 | break; | |
537 | #if MAX_IPI > 0 | |
538 | case 0xA0: /* IPI_IPVP */ | |
539 | case 0xB0: | |
540 | case 0xC0: | |
541 | case 0xD0: | |
542 | { | |
543 | int idx; | |
544 | idx = (addr - 0xA0) >> 4; | |
545 | write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP, val); | |
546 | } | |
547 | break; | |
548 | #endif | |
549 | case 0xE0: /* SPVE */ | |
550 | opp->spve = val & 0x000000FF; | |
551 | break; | |
552 | case 0xF0: /* TIFR */ | |
553 | opp->tifr = val; | |
554 | break; | |
555 | default: | |
556 | break; | |
557 | } | |
558 | } | |
559 | ||
560 | static uint32_t openpic_gbl_read (void *opaque, uint32_t addr) | |
561 | { | |
562 | openpic_t *opp = opaque; | |
563 | uint32_t retval; | |
564 | ||
565 | DPRINTF("%s: addr %08x\n", __func__, addr); | |
566 | retval = 0xFFFFFFFF; | |
567 | if (addr & 0xF) | |
568 | return retval; | |
569 | addr &= 0xFF; | |
570 | switch (addr) { | |
571 | case 0x00: /* FREP */ | |
572 | retval = opp->frep; | |
573 | break; | |
574 | case 0x20: /* GLBC */ | |
575 | retval = opp->glbc; | |
576 | break; | |
577 | case 0x80: /* VENI */ | |
578 | retval = opp->veni; | |
579 | break; | |
580 | case 0x90: /* PINT */ | |
581 | retval = 0x00000000; | |
582 | break; | |
583 | #if MAX_IPI > 0 | |
584 | case 0xA0: /* IPI_IPVP */ | |
585 | case 0xB0: | |
586 | case 0xC0: | |
587 | case 0xD0: | |
588 | { | |
589 | int idx; | |
590 | idx = (addr - 0xA0) >> 4; | |
591 | retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IPVP); | |
592 | } | |
593 | break; | |
594 | #endif | |
595 | case 0xE0: /* SPVE */ | |
596 | retval = opp->spve; | |
597 | break; | |
598 | case 0xF0: /* TIFR */ | |
599 | retval = opp->tifr; | |
600 | break; | |
601 | default: | |
602 | break; | |
603 | } | |
604 | DPRINTF("%s: => %08x\n", __func__, retval); | |
605 | #if defined OPENPIC_SWAP | |
606 | retval = bswap32(retval); | |
607 | #endif | |
608 | ||
609 | return retval; | |
610 | } | |
611 | ||
612 | static void openpic_timer_write (void *opaque, uint32_t addr, uint32_t val) | |
613 | { | |
614 | openpic_t *opp = opaque; | |
615 | int idx; | |
616 | ||
617 | DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val); | |
618 | if (addr & 0xF) | |
619 | return; | |
620 | #if defined OPENPIC_SWAP | |
621 | val = bswap32(val); | |
622 | #endif | |
623 | addr -= 0x1100; | |
624 | addr &= 0xFFFF; | |
625 | idx = (addr & 0xFFF0) >> 6; | |
626 | addr = addr & 0x30; | |
627 | switch (addr) { | |
628 | case 0x00: /* TICC */ | |
629 | break; | |
630 | case 0x10: /* TIBC */ | |
631 | if ((opp->timers[idx].ticc & 0x80000000) != 0 && | |
632 | (val & 0x800000000) == 0 && | |
633 | (opp->timers[idx].tibc & 0x80000000) != 0) | |
634 | opp->timers[idx].ticc &= ~0x80000000; | |
635 | opp->timers[idx].tibc = val; | |
636 | break; | |
637 | case 0x20: /* TIVP */ | |
638 | write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP, val); | |
639 | break; | |
640 | case 0x30: /* TIDE */ | |
641 | write_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE, val); | |
642 | break; | |
643 | } | |
644 | } | |
645 | ||
646 | static uint32_t openpic_timer_read (void *opaque, uint32_t addr) | |
647 | { | |
648 | openpic_t *opp = opaque; | |
649 | uint32_t retval; | |
650 | int idx; | |
651 | ||
652 | DPRINTF("%s: addr %08x\n", __func__, addr); | |
653 | retval = 0xFFFFFFFF; | |
654 | if (addr & 0xF) | |
655 | return retval; | |
656 | addr -= 0x1100; | |
657 | addr &= 0xFFFF; | |
658 | idx = (addr & 0xFFF0) >> 6; | |
659 | addr = addr & 0x30; | |
660 | switch (addr) { | |
661 | case 0x00: /* TICC */ | |
662 | retval = opp->timers[idx].ticc; | |
663 | break; | |
664 | case 0x10: /* TIBC */ | |
665 | retval = opp->timers[idx].tibc; | |
666 | break; | |
667 | case 0x20: /* TIPV */ | |
668 | retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IPVP); | |
669 | break; | |
670 | case 0x30: /* TIDE */ | |
671 | retval = read_IRQreg(opp, IRQ_TIM0 + idx, IRQ_IDE); | |
672 | break; | |
673 | } | |
674 | DPRINTF("%s: => %08x\n", __func__, retval); | |
675 | #if defined OPENPIC_SWAP | |
676 | retval = bswap32(retval); | |
677 | #endif | |
678 | ||
679 | return retval; | |
680 | } | |
681 | ||
682 | static void openpic_src_write (void *opaque, uint32_t addr, uint32_t val) | |
683 | { | |
684 | openpic_t *opp = opaque; | |
685 | int idx; | |
686 | ||
687 | DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val); | |
688 | if (addr & 0xF) | |
689 | return; | |
690 | #if defined OPENPIC_SWAP | |
691 | val = tswap32(val); | |
692 | #endif | |
693 | addr = addr & 0xFFF0; | |
694 | idx = addr >> 5; | |
695 | if (addr & 0x10) { | |
696 | /* EXDE / IFEDE / IEEDE */ | |
697 | write_IRQreg(opp, idx, IRQ_IDE, val); | |
698 | } else { | |
699 | /* EXVP / IFEVP / IEEVP */ | |
700 | write_IRQreg(opp, idx, IRQ_IPVP, val); | |
701 | } | |
702 | } | |
703 | ||
704 | static uint32_t openpic_src_read (void *opaque, uint32_t addr) | |
705 | { | |
706 | openpic_t *opp = opaque; | |
707 | uint32_t retval; | |
708 | int idx; | |
709 | ||
710 | DPRINTF("%s: addr %08x\n", __func__, addr); | |
711 | retval = 0xFFFFFFFF; | |
712 | if (addr & 0xF) | |
713 | return retval; | |
714 | addr = addr & 0xFFF0; | |
715 | idx = addr >> 5; | |
716 | if (addr & 0x10) { | |
717 | /* EXDE / IFEDE / IEEDE */ | |
718 | retval = read_IRQreg(opp, idx, IRQ_IDE); | |
719 | } else { | |
720 | /* EXVP / IFEVP / IEEVP */ | |
721 | retval = read_IRQreg(opp, idx, IRQ_IPVP); | |
722 | } | |
723 | DPRINTF("%s: => %08x\n", __func__, retval); | |
724 | #if defined OPENPIC_SWAP | |
725 | retval = tswap32(retval); | |
726 | #endif | |
727 | ||
728 | return retval; | |
729 | } | |
730 | ||
731 | static void openpic_cpu_write (void *opaque, uint32_t addr, uint32_t val) | |
732 | { | |
733 | openpic_t *opp = opaque; | |
734 | IRQ_src_t *src; | |
735 | IRQ_dst_t *dst; | |
736 | int idx, n_IRQ; | |
737 | ||
738 | DPRINTF("%s: addr %08x <= %08x\n", __func__, addr, val); | |
739 | if (addr & 0xF) | |
740 | return; | |
741 | #if defined OPENPIC_SWAP | |
742 | val = bswap32(val); | |
743 | #endif | |
744 | addr &= 0x1FFF0; | |
745 | idx = addr / 0x1000; | |
746 | dst = &opp->dst[idx]; | |
747 | addr &= 0xFF0; | |
748 | switch (addr) { | |
749 | #if MAX_IPI > 0 | |
750 | case 0x40: /* PIPD */ | |
751 | case 0x50: | |
752 | case 0x60: | |
753 | case 0x70: | |
754 | idx = (addr - 0x40) >> 4; | |
755 | write_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE, val); | |
611493d9 FB |
756 | openpic_set_irq(opp, IRQ_IPI0 + idx, 1); |
757 | openpic_set_irq(opp, IRQ_IPI0 + idx, 0); | |
dbda808a FB |
758 | break; |
759 | #endif | |
760 | case 0x80: /* PCTP */ | |
761 | dst->pctp = val & 0x0000000F; | |
762 | break; | |
763 | case 0x90: /* WHOAMI */ | |
764 | /* Read-only register */ | |
765 | break; | |
766 | case 0xA0: /* PIAC */ | |
767 | /* Read-only register */ | |
768 | break; | |
769 | case 0xB0: /* PEOI */ | |
770 | DPRINTF("PEOI\n"); | |
771 | n_IRQ = IRQ_get_next(opp, &dst->servicing); | |
772 | IRQ_resetbit(&dst->servicing, n_IRQ); | |
773 | dst->servicing.next = -1; | |
774 | src = &opp->src[n_IRQ]; | |
775 | /* Set up next servicing IRQ */ | |
776 | IRQ_get_next(opp, &dst->servicing); | |
777 | /* Check queued interrupts. */ | |
778 | n_IRQ = IRQ_get_next(opp, &dst->raised); | |
779 | if (n_IRQ != -1) { | |
780 | src = &opp->src[n_IRQ]; | |
781 | if (IPVP_PRIORITY(src->ipvp) > dst->servicing.priority) { | |
782 | DPRINTF("Raise CPU IRQ\n"); | |
783 | cpu_interrupt(cpu_single_env, CPU_INTERRUPT_HARD); | |
784 | } | |
785 | } | |
786 | break; | |
787 | default: | |
788 | break; | |
789 | } | |
790 | } | |
791 | ||
792 | static uint32_t openpic_cpu_read (void *opaque, uint32_t addr) | |
793 | { | |
794 | openpic_t *opp = opaque; | |
795 | IRQ_src_t *src; | |
796 | IRQ_dst_t *dst; | |
797 | uint32_t retval; | |
798 | int idx, n_IRQ; | |
799 | ||
800 | DPRINTF("%s: addr %08x\n", __func__, addr); | |
801 | retval = 0xFFFFFFFF; | |
802 | if (addr & 0xF) | |
803 | return retval; | |
804 | addr &= 0x1FFF0; | |
805 | idx = addr / 0x1000; | |
806 | dst = &opp->dst[idx]; | |
807 | addr &= 0xFF0; | |
808 | switch (addr) { | |
809 | case 0x80: /* PCTP */ | |
810 | retval = dst->pctp; | |
811 | break; | |
812 | case 0x90: /* WHOAMI */ | |
813 | retval = idx; | |
814 | break; | |
815 | case 0xA0: /* PIAC */ | |
816 | n_IRQ = IRQ_get_next(opp, &dst->raised); | |
817 | DPRINTF("PIAC: irq=%d\n", n_IRQ); | |
818 | if (n_IRQ == -1) { | |
819 | /* No more interrupt pending */ | |
820 | retval = opp->spve; | |
821 | } else { | |
822 | src = &opp->src[n_IRQ]; | |
823 | if (!test_bit(&src->ipvp, IPVP_ACTIVITY) || | |
824 | !(IPVP_PRIORITY(src->ipvp) > dst->pctp)) { | |
825 | /* - Spurious level-sensitive IRQ | |
826 | * - Priorities has been changed | |
827 | * and the pending IRQ isn't allowed anymore | |
828 | */ | |
829 | reset_bit(&src->ipvp, IPVP_ACTIVITY); | |
830 | retval = IPVP_VECTOR(opp->spve); | |
831 | } else { | |
832 | /* IRQ enter servicing state */ | |
833 | IRQ_setbit(&dst->servicing, n_IRQ); | |
834 | retval = IPVP_VECTOR(src->ipvp); | |
835 | } | |
836 | IRQ_resetbit(&dst->raised, n_IRQ); | |
837 | dst->raised.next = -1; | |
611493d9 FB |
838 | if (!test_bit(&src->ipvp, IPVP_SENSE)) { |
839 | /* edge-sensitive IRQ */ | |
dbda808a | 840 | reset_bit(&src->ipvp, IPVP_ACTIVITY); |
611493d9 FB |
841 | src->pending = 0; |
842 | } | |
dbda808a FB |
843 | } |
844 | break; | |
845 | case 0xB0: /* PEOI */ | |
846 | retval = 0; | |
847 | break; | |
848 | #if MAX_IPI > 0 | |
849 | case 0x40: /* IDE */ | |
850 | case 0x50: | |
851 | idx = (addr - 0x40) >> 4; | |
852 | retval = read_IRQreg(opp, IRQ_IPI0 + idx, IRQ_IDE); | |
853 | break; | |
854 | #endif | |
855 | default: | |
856 | break; | |
857 | } | |
858 | DPRINTF("%s: => %08x\n", __func__, retval); | |
859 | #if defined OPENPIC_SWAP | |
860 | retval= bswap32(retval); | |
861 | #endif | |
862 | ||
863 | return retval; | |
864 | } | |
865 | ||
866 | static void openpic_buggy_write (void *opaque, | |
867 | target_phys_addr_t addr, uint32_t val) | |
868 | { | |
869 | printf("Invalid OPENPIC write access !\n"); | |
870 | } | |
871 | ||
872 | static uint32_t openpic_buggy_read (void *opaque, target_phys_addr_t addr) | |
873 | { | |
874 | printf("Invalid OPENPIC read access !\n"); | |
875 | ||
876 | return -1; | |
877 | } | |
878 | ||
879 | static void openpic_writel (void *opaque, | |
880 | target_phys_addr_t addr, uint32_t val) | |
881 | { | |
882 | openpic_t *opp = opaque; | |
883 | ||
884 | addr &= 0x3FFFF; | |
611493d9 | 885 | DPRINTF("%s: offset %08x val: %08x\n", __func__, (int)addr, val); |
dbda808a FB |
886 | if (addr < 0x1100) { |
887 | /* Global registers */ | |
888 | openpic_gbl_write(opp, addr, val); | |
889 | } else if (addr < 0x10000) { | |
890 | /* Timers registers */ | |
891 | openpic_timer_write(opp, addr, val); | |
892 | } else if (addr < 0x20000) { | |
893 | /* Source registers */ | |
894 | openpic_src_write(opp, addr, val); | |
895 | } else { | |
896 | /* CPU registers */ | |
897 | openpic_cpu_write(opp, addr, val); | |
898 | } | |
899 | } | |
900 | ||
901 | static uint32_t openpic_readl (void *opaque,target_phys_addr_t addr) | |
902 | { | |
903 | openpic_t *opp = opaque; | |
904 | uint32_t retval; | |
905 | ||
906 | addr &= 0x3FFFF; | |
611493d9 | 907 | DPRINTF("%s: offset %08x\n", __func__, (int)addr); |
dbda808a FB |
908 | if (addr < 0x1100) { |
909 | /* Global registers */ | |
910 | retval = openpic_gbl_read(opp, addr); | |
911 | } else if (addr < 0x10000) { | |
912 | /* Timers registers */ | |
913 | retval = openpic_timer_read(opp, addr); | |
914 | } else if (addr < 0x20000) { | |
915 | /* Source registers */ | |
916 | retval = openpic_src_read(opp, addr); | |
917 | } else { | |
918 | /* CPU registers */ | |
919 | retval = openpic_cpu_read(opp, addr); | |
920 | } | |
921 | ||
922 | return retval; | |
923 | } | |
924 | ||
925 | static CPUWriteMemoryFunc *openpic_write[] = { | |
926 | &openpic_buggy_write, | |
927 | &openpic_buggy_write, | |
928 | &openpic_writel, | |
929 | }; | |
930 | ||
931 | static CPUReadMemoryFunc *openpic_read[] = { | |
932 | &openpic_buggy_read, | |
933 | &openpic_buggy_read, | |
934 | &openpic_readl, | |
935 | }; | |
936 | ||
937 | static void openpic_map(PCIDevice *pci_dev, int region_num, | |
938 | uint32_t addr, uint32_t size, int type) | |
939 | { | |
940 | openpic_t *opp; | |
dbda808a FB |
941 | |
942 | DPRINTF("Map OpenPIC\n"); | |
943 | opp = (openpic_t *)pci_dev; | |
944 | /* Global registers */ | |
945 | DPRINTF("Register OPENPIC gbl %08x => %08x\n", | |
946 | addr + 0x1000, addr + 0x1000 + 0x100); | |
947 | /* Timer registers */ | |
948 | DPRINTF("Register OPENPIC timer %08x => %08x\n", | |
949 | addr + 0x1100, addr + 0x1100 + 0x40 * MAX_TMR); | |
950 | /* Interrupt source registers */ | |
951 | DPRINTF("Register OPENPIC src %08x => %08x\n", | |
952 | addr + 0x10000, addr + 0x10000 + 0x20 * (EXT_IRQ + 2)); | |
953 | /* Per CPU registers */ | |
954 | DPRINTF("Register OPENPIC dst %08x => %08x\n", | |
955 | addr + 0x20000, addr + 0x20000 + 0x1000 * MAX_CPU); | |
91d848eb | 956 | cpu_register_physical_memory(addr, 0x40000, opp->mem_index); |
dbda808a FB |
957 | #if 0 // Don't implement ISU for now |
958 | opp_io_memory = cpu_register_io_memory(0, openpic_src_read, | |
959 | openpic_src_write); | |
960 | cpu_register_physical_memory(isu_base, 0x20 * (EXT_IRQ + 2), | |
961 | opp_io_memory); | |
962 | #endif | |
963 | } | |
964 | ||
91d848eb | 965 | openpic_t *openpic_init (PCIBus *bus, int *pmem_index, int nb_cpus) |
dbda808a FB |
966 | { |
967 | openpic_t *opp; | |
968 | uint8_t *pci_conf; | |
969 | int i, m; | |
970 | ||
971 | /* XXX: for now, only one CPU is supported */ | |
972 | if (nb_cpus != 1) | |
973 | return NULL; | |
91d848eb FB |
974 | if (bus) { |
975 | opp = (openpic_t *)pci_register_device(bus, "OpenPIC", sizeof(openpic_t), | |
976 | -1, NULL, NULL); | |
977 | if (opp == NULL) | |
978 | return NULL; | |
979 | pci_conf = opp->pci_dev.config; | |
980 | pci_conf[0x00] = 0x14; // IBM MPIC2 | |
981 | pci_conf[0x01] = 0x10; | |
982 | pci_conf[0x02] = 0xFF; | |
983 | pci_conf[0x03] = 0xFF; | |
984 | pci_conf[0x0a] = 0x80; // PIC | |
985 | pci_conf[0x0b] = 0x08; | |
986 | pci_conf[0x0e] = 0x00; // header_type | |
987 | pci_conf[0x3d] = 0x00; // no interrupt pin | |
988 | ||
989 | /* Register I/O spaces */ | |
990 | pci_register_io_region((PCIDevice *)opp, 0, 0x40000, | |
991 | PCI_ADDRESS_SPACE_MEM, &openpic_map); | |
992 | } else { | |
993 | opp = qemu_mallocz(sizeof(openpic_t)); | |
994 | } | |
995 | ||
996 | opp->mem_index = cpu_register_io_memory(0, openpic_read, | |
997 | openpic_write, opp); | |
998 | ||
999 | // isu_base &= 0xFFFC0000; | |
dbda808a FB |
1000 | opp->nb_cpus = nb_cpus; |
1001 | /* Set IRQ types */ | |
1002 | for (i = 0; i < EXT_IRQ; i++) { | |
1003 | opp->src[i].type = IRQ_EXTERNAL; | |
1004 | } | |
1005 | for (; i < IRQ_TIM0; i++) { | |
1006 | opp->src[i].type = IRQ_SPECIAL; | |
1007 | } | |
1008 | #if MAX_IPI > 0 | |
1009 | m = IRQ_IPI0; | |
1010 | #else | |
1011 | m = IRQ_DBL0; | |
1012 | #endif | |
1013 | for (; i < m; i++) { | |
1014 | opp->src[i].type = IRQ_TIMER; | |
1015 | } | |
1016 | for (; i < MAX_IRQ; i++) { | |
1017 | opp->src[i].type = IRQ_INTERNAL; | |
1018 | } | |
1019 | openpic_reset(opp); | |
91d848eb FB |
1020 | if (pmem_index) |
1021 | *pmem_index = opp->mem_index; | |
dbda808a FB |
1022 | return opp; |
1023 | } |