2 * ARM GICv3 emulation: Distributor
4 * Copyright (c) 2015 Huawei.
5 * Copyright (c) 2016 Linaro Limited.
6 * Written by Shlomo Pongratz, Peter Maydell
8 * This code is licensed under the GPL, version 2 or (at your option)
12 #include "qemu/osdep.h"
15 #include "gicv3_internal.h"
17 /* The GICD_NSACR registers contain a two bit field for each interrupt which
18 * allows the guest to give NonSecure code access to registers controlling
20 * 0b00: no access (NS accesses to bits for Secure interrupts will RAZ/WI)
21 * 0b01: NS r/w accesses permitted to ISPENDR, SETSPI_NSR, SGIR
22 * 0b10: as 0b01, and also r/w to ICPENDR, r/o to ISACTIVER/ICACTIVER,
23 * and w/o to CLRSPI_NSR
24 * 0b11: as 0b10, and also r/w to IROUTER and ITARGETSR
26 * Given a (multiple-of-32) interrupt number, these mask functions return
27 * a mask word where each bit is 1 if the NSACR settings permit access
28 * to the interrupt. The mask returned can then be ORed with the GICD_GROUP
29 * word for this set of interrupts to give an overall mask.
32 typedef uint32_t maskfn(GICv3State *s, int irq);
34 static uint32_t mask_nsacr_ge1(GICv3State *s, int irq)
36 /* Return a mask where each bit is set if the NSACR field is >= 1 */
37 uint64_t raw_nsacr = s->gicd_nsacr[irq / 16 + 1];
39 raw_nsacr = raw_nsacr << 32 | s->gicd_nsacr[irq / 16];
40 raw_nsacr = (raw_nsacr >> 1) | raw_nsacr;
41 return half_unshuffle64(raw_nsacr);
44 static uint32_t mask_nsacr_ge2(GICv3State *s, int irq)
46 /* Return a mask where each bit is set if the NSACR field is >= 2 */
47 uint64_t raw_nsacr = s->gicd_nsacr[irq / 16 + 1];
49 raw_nsacr = raw_nsacr << 32 | s->gicd_nsacr[irq / 16];
50 raw_nsacr = raw_nsacr >> 1;
51 return half_unshuffle64(raw_nsacr);
54 /* We don't need a mask_nsacr_ge3() because IROUTER<n> isn't a bitmap register,
55 * but it would be implemented using:
56 * raw_nsacr = (raw_nsacr >> 1) & raw_nsacr;
59 static uint32_t mask_group_and_nsacr(GICv3State *s, MemTxAttrs attrs,
60 maskfn *maskfn, int irq)
62 /* Return a 32-bit mask which should be applied for this set of 32
63 * interrupts; each bit is 1 if access is permitted by the
64 * combination of attrs.secure, GICD_GROUPR and GICD_NSACR.
68 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
69 /* bits for Group 0 or Secure Group 1 interrupts are RAZ/WI
70 * unless the NSACR bits permit access.
72 mask = *gic_bmp_ptr32(s->group, irq);
74 mask |= maskfn(s, irq);
81 static int gicd_ns_access(GICv3State *s, int irq)
83 /* Return the 2 bit NS_access<x> field from GICD_NSACR<n> for the
84 * specified interrupt.
86 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
89 return extract32(s->gicd_nsacr[irq / 16], (irq % 16) * 2, 2);
92 static void gicd_write_set_bitmap_reg(GICv3State *s, MemTxAttrs attrs,
95 int offset, uint32_t val)
97 /* Helper routine to implement writing to a "set-bitmap" register
98 * (GICD_ISENABLER, GICD_ISPENDR, etc).
99 * Semantics implemented here:
100 * RAZ/WI for SGIs, PPIs, unimplemented IRQs
101 * Bits corresponding to Group 0 or Secure Group 1 interrupts RAZ/WI.
102 * Writing 1 means "set bit in bitmap"; writing 0 is ignored.
103 * offset should be the offset in bytes of the register from the start
106 int irq = offset * 8;
108 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
111 val &= mask_group_and_nsacr(s, attrs, maskfn, irq);
112 *gic_bmp_ptr32(bmp, irq) |= val;
113 gicv3_update(s, irq, 32);
116 static void gicd_write_clear_bitmap_reg(GICv3State *s, MemTxAttrs attrs,
119 int offset, uint32_t val)
121 /* Helper routine to implement writing to a "clear-bitmap" register
122 * (GICD_ICENABLER, GICD_ICPENDR, etc).
123 * Semantics implemented here:
124 * RAZ/WI for SGIs, PPIs, unimplemented IRQs
125 * Bits corresponding to Group 0 or Secure Group 1 interrupts RAZ/WI.
126 * Writing 1 means "clear bit in bitmap"; writing 0 is ignored.
127 * offset should be the offset in bytes of the register from the start
130 int irq = offset * 8;
132 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
135 val &= mask_group_and_nsacr(s, attrs, maskfn, irq);
136 *gic_bmp_ptr32(bmp, irq) &= ~val;
137 gicv3_update(s, irq, 32);
140 static uint32_t gicd_read_bitmap_reg(GICv3State *s, MemTxAttrs attrs,
145 /* Helper routine to implement reading a "set/clear-bitmap" register
146 * (GICD_ICENABLER, GICD_ISENABLER, GICD_ICPENDR, etc).
147 * Semantics implemented here:
148 * RAZ/WI for SGIs, PPIs, unimplemented IRQs
149 * Bits corresponding to Group 0 or Secure Group 1 interrupts RAZ/WI.
150 * offset should be the offset in bytes of the register from the start
153 int irq = offset * 8;
156 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
159 val = *gic_bmp_ptr32(bmp, irq);
160 if (bmp == s->pending) {
161 /* The PENDING register is a special case -- for level triggered
162 * interrupts, the PENDING state is the logical OR of the state of
163 * the PENDING latch with the input line level.
165 uint32_t edge = *gic_bmp_ptr32(s->edge_trigger, irq);
166 uint32_t level = *gic_bmp_ptr32(s->level, irq);
167 val |= (~edge & level);
169 val &= mask_group_and_nsacr(s, attrs, maskfn, irq);
173 static uint8_t gicd_read_ipriorityr(GICv3State *s, MemTxAttrs attrs, int irq)
175 /* Read the value of GICD_IPRIORITYR<n> for the specified interrupt,
176 * honouring security state (these are RAZ/WI for Group 0 or Secure
177 * Group 1 interrupts).
181 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
185 prio = s->gicd_ipriority[irq];
187 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
188 if (!gicv3_gicd_group_test(s, irq)) {
189 /* Fields for Group 0 or Secure Group 1 interrupts are RAZ/WI */
192 /* NS view of the interrupt priority */
193 prio = (prio << 1) & 0xff;
198 static void gicd_write_ipriorityr(GICv3State *s, MemTxAttrs attrs, int irq,
201 /* Write the value of GICD_IPRIORITYR<n> for the specified interrupt,
202 * honouring security state (these are RAZ/WI for Group 0 or Secure
203 * Group 1 interrupts).
205 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
209 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
210 if (!gicv3_gicd_group_test(s, irq)) {
211 /* Fields for Group 0 or Secure Group 1 interrupts are RAZ/WI */
214 /* NS view of the interrupt priority */
215 value = 0x80 | (value >> 1);
217 s->gicd_ipriority[irq] = value;
220 static uint64_t gicd_read_irouter(GICv3State *s, MemTxAttrs attrs, int irq)
222 /* Read the value of GICD_IROUTER<n> for the specified interrupt,
223 * honouring security state.
225 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
229 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
230 /* RAZ/WI for NS accesses to secure interrupts */
231 if (!gicv3_gicd_group_test(s, irq)) {
232 if (gicd_ns_access(s, irq) != 3) {
238 return s->gicd_irouter[irq];
241 static void gicd_write_irouter(GICv3State *s, MemTxAttrs attrs, int irq,
244 /* Write the value of GICD_IROUTER<n> for the specified interrupt,
245 * honouring security state.
247 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
251 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
252 /* RAZ/WI for NS accesses to secure interrupts */
253 if (!gicv3_gicd_group_test(s, irq)) {
254 if (gicd_ns_access(s, irq) != 3) {
260 s->gicd_irouter[irq] = val;
261 gicv3_cache_target_cpustate(s, irq);
262 gicv3_update(s, irq, 1);
265 static MemTxResult gicd_readb(GICv3State *s, hwaddr offset,
266 uint64_t *data, MemTxAttrs attrs)
268 /* Most GICv3 distributor registers do not support byte accesses. */
270 case GICD_CPENDSGIR ... GICD_CPENDSGIR + 0xf:
271 case GICD_SPENDSGIR ... GICD_SPENDSGIR + 0xf:
272 case GICD_ITARGETSR ... GICD_ITARGETSR + 0x3ff:
273 /* This GIC implementation always has affinity routing enabled,
274 * so these registers are all RAZ/WI.
277 case GICD_IPRIORITYR ... GICD_IPRIORITYR + 0x3ff:
278 *data = gicd_read_ipriorityr(s, attrs, offset - GICD_IPRIORITYR);
285 static MemTxResult gicd_writeb(GICv3State *s, hwaddr offset,
286 uint64_t value, MemTxAttrs attrs)
288 /* Most GICv3 distributor registers do not support byte accesses. */
290 case GICD_CPENDSGIR ... GICD_CPENDSGIR + 0xf:
291 case GICD_SPENDSGIR ... GICD_SPENDSGIR + 0xf:
292 case GICD_ITARGETSR ... GICD_ITARGETSR + 0x3ff:
293 /* This GIC implementation always has affinity routing enabled,
294 * so these registers are all RAZ/WI.
297 case GICD_IPRIORITYR ... GICD_IPRIORITYR + 0x3ff:
299 int irq = offset - GICD_IPRIORITYR;
301 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
304 gicd_write_ipriorityr(s, attrs, irq, value);
305 gicv3_update(s, irq, 1);
313 static MemTxResult gicd_readw(GICv3State *s, hwaddr offset,
314 uint64_t *data, MemTxAttrs attrs)
316 /* Only GICD_SETSPI_NSR, GICD_CLRSPI_NSR, GICD_SETSPI_SR and GICD_SETSPI_NSR
317 * support 16 bit accesses, and those registers are all part of the
318 * optional message-based SPI feature which this GIC does not currently
319 * implement (ie for us GICD_TYPER.MBIS == 0), so for us they are
325 static MemTxResult gicd_writew(GICv3State *s, hwaddr offset,
326 uint64_t value, MemTxAttrs attrs)
328 /* Only GICD_SETSPI_NSR, GICD_CLRSPI_NSR, GICD_SETSPI_SR and GICD_SETSPI_NSR
329 * support 16 bit accesses, and those registers are all part of the
330 * optional message-based SPI feature which this GIC does not currently
331 * implement (ie for us GICD_TYPER.MBIS == 0), so for us they are
337 static MemTxResult gicd_readl(GICv3State *s, hwaddr offset,
338 uint64_t *data, MemTxAttrs attrs)
340 /* Almost all GICv3 distributor registers are 32-bit.
341 * Note that WO registers must return an UNKNOWN value on reads,
347 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
348 /* The NS view of the GICD_CTLR sees only certain bits:
349 * + bit [31] (RWP) is an alias of the Secure bit [31]
350 * + bit [4] (ARE_NS) is an alias of Secure bit [5]
351 * + bit [1] (EnableGrp1A) is an alias of Secure bit [1] if
352 * NS affinity routing is enabled, otherwise RES0
353 * + bit [0] (EnableGrp1) is an alias of Secure bit [1] if
354 * NS affinity routing is not enabled, otherwise RES0
355 * Since for QEMU affinity routing is always enabled
356 * for both S and NS this means that bits [4] and [5] are
357 * both always 1, and we can simply make the NS view
358 * be bits 31, 4 and 1 of the S view.
360 *data = s->gicd_ctlr & (GICD_CTLR_ARE_S |
361 GICD_CTLR_EN_GRP1NS |
364 *data = s->gicd_ctlr;
369 /* For this implementation:
370 * No1N == 1 (1-of-N SPI interrupts not supported)
371 * A3V == 1 (non-zero values of Affinity level 3 supported)
372 * IDbits == 0xf (we support 16-bit interrupt identifiers)
373 * DVIS == 0 (Direct virtual LPI injection not supported)
374 * LPIS == 0 (LPIs not supported)
375 * MBIS == 0 (message-based SPIs not supported)
376 * SecurityExtn == 1 if security extns supported
377 * CPUNumber == 0 since for us ARE is always 1
378 * ITLinesNumber == (num external irqs / 32) - 1
380 int itlinesnumber = ((s->num_irq - GIC_INTERNAL) / 32) - 1;
382 *data = (1 << 25) | (1 << 24) | (s->security_extn << 10) |
383 (0xf << 19) | itlinesnumber;
387 /* We claim to be an ARM r0p0 with a zero ProductID.
388 * This is the same as an r0p0 GIC-500.
390 *data = gicv3_iidr();
393 /* RAZ/WI for us (this is an optional register and our implementation
394 * does not track RO/WO/reserved violations to report them to the guest)
398 case GICD_IGROUPR ... GICD_IGROUPR + 0x7f:
402 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
406 /* RAZ/WI for SGIs, PPIs, unimplemented irqs */
407 irq = (offset - GICD_IGROUPR) * 8;
408 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
412 *data = *gic_bmp_ptr32(s->group, irq);
415 case GICD_ISENABLER ... GICD_ISENABLER + 0x7f:
416 *data = gicd_read_bitmap_reg(s, attrs, s->enabled, NULL,
417 offset - GICD_ISENABLER);
419 case GICD_ICENABLER ... GICD_ICENABLER + 0x7f:
420 *data = gicd_read_bitmap_reg(s, attrs, s->enabled, NULL,
421 offset - GICD_ICENABLER);
423 case GICD_ISPENDR ... GICD_ISPENDR + 0x7f:
424 *data = gicd_read_bitmap_reg(s, attrs, s->pending, mask_nsacr_ge1,
425 offset - GICD_ISPENDR);
427 case GICD_ICPENDR ... GICD_ICPENDR + 0x7f:
428 *data = gicd_read_bitmap_reg(s, attrs, s->pending, mask_nsacr_ge2,
429 offset - GICD_ICPENDR);
431 case GICD_ISACTIVER ... GICD_ISACTIVER + 0x7f:
432 *data = gicd_read_bitmap_reg(s, attrs, s->active, mask_nsacr_ge2,
433 offset - GICD_ISACTIVER);
435 case GICD_ICACTIVER ... GICD_ICACTIVER + 0x7f:
436 *data = gicd_read_bitmap_reg(s, attrs, s->active, mask_nsacr_ge2,
437 offset - GICD_ICACTIVER);
439 case GICD_IPRIORITYR ... GICD_IPRIORITYR + 0x3ff:
441 int i, irq = offset - GICD_IPRIORITYR;
444 for (i = irq + 3; i >= irq; i--, value <<= 8) {
445 value |= gicd_read_ipriorityr(s, attrs, i);
450 case GICD_ITARGETSR ... GICD_ITARGETSR + 0x3ff:
451 /* RAZ/WI since affinity routing is always enabled */
454 case GICD_ICFGR ... GICD_ICFGR + 0xff:
456 /* Here only the even bits are used; odd bits are RES0 */
457 int irq = (offset - GICD_ICFGR) * 4;
460 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
465 /* Since our edge_trigger bitmap is one bit per irq, we only need
466 * half of the 32-bit word, which we can then spread out
469 value = *gic_bmp_ptr32(s->edge_trigger, irq & ~0x1f);
470 value &= mask_group_and_nsacr(s, attrs, NULL, irq & ~0x1f);
471 value = extract32(value, (irq & 0x1f) ? 16 : 0, 16);
472 value = half_shuffle32(value) << 1;
476 case GICD_IGRPMODR ... GICD_IGRPMODR + 0xff:
480 if ((s->gicd_ctlr & GICD_CTLR_DS) || !attrs.secure) {
481 /* RAZ/WI if security disabled, or if
482 * security enabled and this is an NS access
487 /* RAZ/WI for SGIs, PPIs, unimplemented irqs */
488 irq = (offset - GICD_IGRPMODR) * 8;
489 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
493 *data = *gic_bmp_ptr32(s->grpmod, irq);
496 case GICD_NSACR ... GICD_NSACR + 0xff:
498 /* Two bits per interrupt */
499 int irq = (offset - GICD_NSACR) * 4;
501 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
506 if ((s->gicd_ctlr & GICD_CTLR_DS) || !attrs.secure) {
507 /* RAZ/WI if security disabled, or if
508 * security enabled and this is an NS access
514 *data = s->gicd_nsacr[irq / 16];
517 case GICD_CPENDSGIR ... GICD_CPENDSGIR + 0xf:
518 case GICD_SPENDSGIR ... GICD_SPENDSGIR + 0xf:
519 /* RAZ/WI since affinity routing is always enabled */
522 case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
525 int irq = (offset - GICD_IROUTER) / 8;
527 r = gicd_read_irouter(s, attrs, irq);
535 case GICD_IDREGS ... GICD_IDREGS + 0x1f:
537 *data = gicv3_idreg(offset - GICD_IDREGS);
540 /* WO registers, return unknown value */
541 qemu_log_mask(LOG_GUEST_ERROR,
542 "%s: invalid guest read from WO register at offset "
543 TARGET_FMT_plx "\n", __func__, offset);
551 static MemTxResult gicd_writel(GICv3State *s, hwaddr offset,
552 uint64_t value, MemTxAttrs attrs)
554 /* Almost all GICv3 distributor registers are 32-bit. Note that
555 * RO registers must ignore writes, not abort.
563 if (s->gicd_ctlr & GICD_CTLR_DS) {
564 /* With only one security state, E1NWF is RAZ/WI, DS is RAO/WI,
565 * ARE is RAO/WI (affinity routing always on), and only
566 * bits 0 and 1 (group enables) are writable.
568 mask = GICD_CTLR_EN_GRP0 | GICD_CTLR_EN_GRP1NS;
571 /* for secure access:
572 * ARE_NS and ARE_S are RAO/WI (affinity routing always on)
573 * E1NWF is RAZ/WI (we don't support enable-1-of-n-wakeup)
575 * We can only modify bits[2:0] (the group enables).
577 mask = GICD_CTLR_DS | GICD_CTLR_EN_GRP0 | GICD_CTLR_EN_GRP1_ALL;
579 /* For non secure access ARE_NS is RAO/WI and EnableGrp1
580 * is RES0. The only writable bit is [1] (EnableGrp1A), which
581 * is an alias of the Secure bit [1].
583 mask = GICD_CTLR_EN_GRP1NS;
586 s->gicd_ctlr = (s->gicd_ctlr & ~mask) | (value & mask);
587 if (value & mask & GICD_CTLR_DS) {
588 /* We just set DS, so the ARE_NS and EnG1S bits are now RES0.
589 * Note that this is a one-way transition because if DS is set
590 * then it's not writeable, so it can only go back to 0 with a
593 s->gicd_ctlr &= ~(GICD_CTLR_EN_GRP1S | GICD_CTLR_ARE_NS);
595 gicv3_full_update(s);
599 /* RAZ/WI for our implementation */
601 case GICD_IGROUPR ... GICD_IGROUPR + 0x7f:
605 if (!attrs.secure && !(s->gicd_ctlr & GICD_CTLR_DS)) {
608 /* RAZ/WI for SGIs, PPIs, unimplemented irqs */
609 irq = (offset - GICD_IGROUPR) * 8;
610 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
613 *gic_bmp_ptr32(s->group, irq) = value;
614 gicv3_update(s, irq, 32);
617 case GICD_ISENABLER ... GICD_ISENABLER + 0x7f:
618 gicd_write_set_bitmap_reg(s, attrs, s->enabled, NULL,
619 offset - GICD_ISENABLER, value);
621 case GICD_ICENABLER ... GICD_ICENABLER + 0x7f:
622 gicd_write_clear_bitmap_reg(s, attrs, s->enabled, NULL,
623 offset - GICD_ICENABLER, value);
625 case GICD_ISPENDR ... GICD_ISPENDR + 0x7f:
626 gicd_write_set_bitmap_reg(s, attrs, s->pending, mask_nsacr_ge1,
627 offset - GICD_ISPENDR, value);
629 case GICD_ICPENDR ... GICD_ICPENDR + 0x7f:
630 gicd_write_clear_bitmap_reg(s, attrs, s->pending, mask_nsacr_ge2,
631 offset - GICD_ICPENDR, value);
633 case GICD_ISACTIVER ... GICD_ISACTIVER + 0x7f:
634 gicd_write_set_bitmap_reg(s, attrs, s->active, NULL,
635 offset - GICD_ISACTIVER, value);
637 case GICD_ICACTIVER ... GICD_ICACTIVER + 0x7f:
638 gicd_write_clear_bitmap_reg(s, attrs, s->active, NULL,
639 offset - GICD_ICACTIVER, value);
641 case GICD_IPRIORITYR ... GICD_IPRIORITYR + 0x3ff:
643 int i, irq = offset - GICD_IPRIORITYR;
645 if (irq < GIC_INTERNAL || irq + 3 >= s->num_irq) {
649 for (i = irq; i < irq + 4; i++, value >>= 8) {
650 gicd_write_ipriorityr(s, attrs, i, value);
652 gicv3_update(s, irq, 4);
655 case GICD_ITARGETSR ... GICD_ITARGETSR + 0x3ff:
656 /* RAZ/WI since affinity routing is always enabled */
658 case GICD_ICFGR ... GICD_ICFGR + 0xff:
660 /* Here only the odd bits are used; even bits are RES0 */
661 int irq = (offset - GICD_ICFGR) * 4;
662 uint32_t mask, oldval;
664 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
668 /* Since our edge_trigger bitmap is one bit per irq, our input
669 * 32-bits will compress down into 16 bits which we need
670 * to write into the bitmap.
672 value = half_unshuffle32(value >> 1);
673 mask = mask_group_and_nsacr(s, attrs, NULL, irq & ~0x1f);
680 oldval = *gic_bmp_ptr32(s->edge_trigger, (irq & ~0x1f));
681 value = (oldval & ~mask) | (value & mask);
682 *gic_bmp_ptr32(s->edge_trigger, irq & ~0x1f) = value;
685 case GICD_IGRPMODR ... GICD_IGRPMODR + 0xff:
689 if ((s->gicd_ctlr & GICD_CTLR_DS) || !attrs.secure) {
690 /* RAZ/WI if security disabled, or if
691 * security enabled and this is an NS access
695 /* RAZ/WI for SGIs, PPIs, unimplemented irqs */
696 irq = (offset - GICD_IGRPMODR) * 8;
697 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
700 *gic_bmp_ptr32(s->grpmod, irq) = value;
701 gicv3_update(s, irq, 32);
704 case GICD_NSACR ... GICD_NSACR + 0xff:
706 /* Two bits per interrupt */
707 int irq = (offset - GICD_NSACR) * 4;
709 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
713 if ((s->gicd_ctlr & GICD_CTLR_DS) || !attrs.secure) {
714 /* RAZ/WI if security disabled, or if
715 * security enabled and this is an NS access
720 s->gicd_nsacr[irq / 16] = value;
721 /* No update required as this only affects access permission checks */
725 /* RES0 if affinity routing is enabled */
727 case GICD_CPENDSGIR ... GICD_CPENDSGIR + 0xf:
728 case GICD_SPENDSGIR ... GICD_SPENDSGIR + 0xf:
729 /* RAZ/WI since affinity routing is always enabled */
731 case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
734 int irq = (offset - GICD_IROUTER) / 8;
736 if (irq < GIC_INTERNAL || irq >= s->num_irq) {
740 /* Write half of the 64-bit register */
741 r = gicd_read_irouter(s, attrs, irq);
742 r = deposit64(r, (offset & 7) ? 32 : 0, 32, value);
743 gicd_write_irouter(s, attrs, irq, r);
746 case GICD_IDREGS ... GICD_IDREGS + 0x1f:
749 /* RO registers, ignore the write */
750 qemu_log_mask(LOG_GUEST_ERROR,
751 "%s: invalid guest write to RO register at offset "
752 TARGET_FMT_plx "\n", __func__, offset);
759 static MemTxResult gicd_writell(GICv3State *s, hwaddr offset,
760 uint64_t value, MemTxAttrs attrs)
762 /* Our only 64-bit registers are GICD_IROUTER<n> */
766 case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
767 irq = (offset - GICD_IROUTER) / 8;
768 gicd_write_irouter(s, attrs, irq, value);
775 static MemTxResult gicd_readll(GICv3State *s, hwaddr offset,
776 uint64_t *data, MemTxAttrs attrs)
778 /* Our only 64-bit registers are GICD_IROUTER<n> */
782 case GICD_IROUTER ... GICD_IROUTER + 0x1fdf:
783 irq = (offset - GICD_IROUTER) / 8;
784 *data = gicd_read_irouter(s, attrs, irq);
791 MemTxResult gicv3_dist_read(void *opaque, hwaddr offset, uint64_t *data,
792 unsigned size, MemTxAttrs attrs)
794 GICv3State *s = (GICv3State *)opaque;
799 r = gicd_readb(s, offset, data, attrs);
802 r = gicd_readw(s, offset, data, attrs);
805 r = gicd_readl(s, offset, data, attrs);
808 r = gicd_readll(s, offset, data, attrs);
815 if (r == MEMTX_ERROR) {
816 qemu_log_mask(LOG_GUEST_ERROR,
817 "%s: invalid guest read at offset " TARGET_FMT_plx
818 "size %u\n", __func__, offset, size);
819 trace_gicv3_dist_badread(offset, size, attrs.secure);
820 /* The spec requires that reserved registers are RAZ/WI;
821 * so use MEMTX_ERROR returns from leaf functions as a way to
822 * trigger the guest-error logging but don't return it to
823 * the caller, or we'll cause a spurious guest data abort.
828 trace_gicv3_dist_read(offset, *data, size, attrs.secure);
833 MemTxResult gicv3_dist_write(void *opaque, hwaddr offset, uint64_t data,
834 unsigned size, MemTxAttrs attrs)
836 GICv3State *s = (GICv3State *)opaque;
841 r = gicd_writeb(s, offset, data, attrs);
844 r = gicd_writew(s, offset, data, attrs);
847 r = gicd_writel(s, offset, data, attrs);
850 r = gicd_writell(s, offset, data, attrs);
857 if (r == MEMTX_ERROR) {
858 qemu_log_mask(LOG_GUEST_ERROR,
859 "%s: invalid guest write at offset " TARGET_FMT_plx
860 "size %u\n", __func__, offset, size);
861 trace_gicv3_dist_badwrite(offset, data, size, attrs.secure);
862 /* The spec requires that reserved registers are RAZ/WI;
863 * so use MEMTX_ERROR returns from leaf functions as a way to
864 * trigger the guest-error logging but don't return it to
865 * the caller, or we'll cause a spurious guest data abort.
869 trace_gicv3_dist_write(offset, data, size, attrs.secure);
874 void gicv3_dist_set_irq(GICv3State *s, int irq, int level)
876 /* Update distributor state for a change in an external SPI input line */
877 if (level == gicv3_gicd_level_test(s, irq)) {
881 trace_gicv3_dist_set_irq(irq, level);
883 gicv3_gicd_level_replace(s, irq, level);
886 /* 0->1 edges latch the pending bit for edge-triggered interrupts */
887 if (gicv3_gicd_edge_trigger_test(s, irq)) {
888 gicv3_gicd_pending_set(s, irq);
892 gicv3_update(s, irq, 1);