4 * Copyright (c) 2006 Fabrice Bellard
5 * Copyright (c) 2009, 2010, 2011
6 * Isaku Yamahata <yamahata at valinux co jp>
7 * VA Linux Systems Japan K.K.
8 * Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
10 * This is based on piix_pci.c, but heavily modified.
12 * Permission is hereby granted, free of charge, to any person obtaining a copy
13 * of this software and associated documentation files (the "Software"), to deal
14 * in the Software without restriction, including without limitation the rights
15 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
16 * copies of the Software, and to permit persons to whom the Software is
17 * furnished to do so, subject to the following conditions:
19 * The above copyright notice and this permission notice shall be included in
20 * all copies or substantial portions of the Software.
22 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
23 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
24 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
25 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
26 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
27 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 #include "qemu-common.h"
39 #include "pci/pcie_host.h"
40 #include "pci/pci_bridge.h"
43 #include "acpi_ich9.h"
45 #include "pci/pci_bus.h"
46 #include "exec/address-spaces.h"
49 static int ich9_lpc_sci_irq(ICH9LPCState *lpc);
51 /*****************************************************************************/
52 /* ICH9 LPC PCI to ISA bridge */
54 static void ich9_lpc_reset(DeviceState *qdev);
56 /* chipset configuration register
57 * to access chipset configuration registers, pci_[sg]et_{byte, word, long}
59 * Although it's not pci configuration space, it's little endian as Intel.
62 static void ich9_cc_update_ir(uint8_t irr[PCI_NUM_PINS], uint16_t ir)
65 for (intx = 0; intx < PCI_NUM_PINS; intx++) {
66 irr[intx] = (ir >> (intx * ICH9_CC_DIR_SHIFT)) & ICH9_CC_DIR_MASK;
70 static void ich9_cc_update(ICH9LPCState *lpc)
75 const int reg_offsets[] = {
86 /* D{25 - 31}IR, but D30IR is read only to 0. */
87 for (slot = 25, offset = reg_offsets; slot < 32; slot++, offset++) {
91 ich9_cc_update_ir(lpc->irr[slot],
92 pci_get_word(lpc->chip_config + *offset));
97 * It is arbitrarily decided how INTx lines of PCI devicesbehind the bridge
98 * are connected to pirq lines. Our choice is PIRQ[E-H].
99 * INT[A-D] are connected to PIRQ[E-H]
101 for (pci_intx = 0; pci_intx < PCI_NUM_PINS; pci_intx++) {
102 lpc->irr[30][pci_intx] = pci_intx + 4;
106 static void ich9_cc_init(ICH9LPCState *lpc)
111 /* the default irq routing is arbitrary as long as it matches with
112 * acpi irq routing table.
113 * The one that is incompatible with piix_pci(= bochs) one is
114 * intentionally chosen to let the users know that the different
117 * int[A-D] -> pirq[E-F]
118 * avoid pirq A-D because they are used for pci express port
120 for (slot = 0; slot < PCI_SLOT_MAX; slot++) {
121 for (intx = 0; intx < PCI_NUM_PINS; intx++) {
122 lpc->irr[slot][intx] = (slot + intx) % 4 + 4;
128 static void ich9_cc_reset(ICH9LPCState *lpc)
130 uint8_t *c = lpc->chip_config;
132 memset(lpc->chip_config, 0, sizeof(lpc->chip_config));
134 pci_set_long(c + ICH9_CC_D31IR, ICH9_CC_DIR_DEFAULT);
135 pci_set_long(c + ICH9_CC_D30IR, ICH9_CC_D30IR_DEFAULT);
136 pci_set_long(c + ICH9_CC_D29IR, ICH9_CC_DIR_DEFAULT);
137 pci_set_long(c + ICH9_CC_D28IR, ICH9_CC_DIR_DEFAULT);
138 pci_set_long(c + ICH9_CC_D27IR, ICH9_CC_DIR_DEFAULT);
139 pci_set_long(c + ICH9_CC_D26IR, ICH9_CC_DIR_DEFAULT);
140 pci_set_long(c + ICH9_CC_D25IR, ICH9_CC_DIR_DEFAULT);
145 static void ich9_cc_addr_len(uint64_t *addr, unsigned *len)
147 *addr &= ICH9_CC_ADDR_MASK;
148 if (*addr + *len >= ICH9_CC_SIZE) {
149 *len = ICH9_CC_SIZE - *addr;
153 /* val: little endian */
154 static void ich9_cc_write(void *opaque, hwaddr addr,
155 uint64_t val, unsigned len)
157 ICH9LPCState *lpc = (ICH9LPCState *)opaque;
159 ich9_cc_addr_len(&addr, &len);
160 memcpy(lpc->chip_config + addr, &val, len);
164 /* return value: little endian */
165 static uint64_t ich9_cc_read(void *opaque, hwaddr addr,
168 ICH9LPCState *lpc = (ICH9LPCState *)opaque;
171 ich9_cc_addr_len(&addr, &len);
172 memcpy(&val, lpc->chip_config + addr, len);
178 static void ich9_lpc_rout(uint8_t pirq_rout, int *pic_irq, int *pic_dis)
180 *pic_irq = pirq_rout & ICH9_LPC_PIRQ_ROUT_MASK;
181 *pic_dis = pirq_rout & ICH9_LPC_PIRQ_ROUT_IRQEN;
184 static void ich9_lpc_pic_irq(ICH9LPCState *lpc, int pirq_num,
185 int *pic_irq, int *pic_dis)
188 case 0 ... 3: /* A-D */
189 ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQA_ROUT + pirq_num],
192 case 4 ... 7: /* E-H */
193 ich9_lpc_rout(lpc->d.config[ICH9_LPC_PIRQE_ROUT + (pirq_num - 4)],
202 /* pic_irq: i8254 irq 0-15 */
203 static void ich9_lpc_update_pic(ICH9LPCState *lpc, int pic_irq)
207 /* The pic level is the logical OR of all the PCI irqs mapped to it */
209 for (i = 0; i < ICH9_LPC_NB_PIRQS; i++) {
212 ich9_lpc_pic_irq(lpc, i, &tmp_irq, &tmp_dis);
213 if (!tmp_dis && pic_irq == tmp_irq) {
214 pic_level |= pci_bus_get_irq_level(lpc->d.bus, i);
217 if (pic_irq == ich9_lpc_sci_irq(lpc)) {
218 pic_level |= lpc->sci_level;
221 qemu_set_irq(lpc->pic[pic_irq], pic_level);
224 /* pirq: pirq[A-H] 0-7*/
225 static void ich9_lpc_update_by_pirq(ICH9LPCState *lpc, int pirq)
230 ich9_lpc_pic_irq(lpc, pirq, &pic_irq, &pic_dis);
231 assert(pic_irq < ICH9_LPC_PIC_NUM_PINS);
236 ich9_lpc_update_pic(lpc, pic_irq);
239 /* APIC mode: GSIx: PIRQ[A-H] -> GSI 16, ... no pirq shares same APIC pins. */
240 static int ich9_pirq_to_gsi(int pirq)
242 return pirq + ICH9_LPC_PIC_NUM_PINS;
245 static int ich9_gsi_to_pirq(int gsi)
247 return gsi - ICH9_LPC_PIC_NUM_PINS;
250 static void ich9_lpc_update_apic(ICH9LPCState *lpc, int gsi)
254 if (gsi >= ICH9_LPC_PIC_NUM_PINS) {
255 level |= pci_bus_get_irq_level(lpc->d.bus, ich9_gsi_to_pirq(gsi));
257 if (gsi == ich9_lpc_sci_irq(lpc)) {
258 level |= lpc->sci_level;
261 qemu_set_irq(lpc->ioapic[gsi], level);
264 void ich9_lpc_set_irq(void *opaque, int pirq, int level)
266 ICH9LPCState *lpc = opaque;
269 assert(pirq < ICH9_LPC_NB_PIRQS);
271 ich9_lpc_update_apic(lpc, ich9_pirq_to_gsi(pirq));
272 ich9_lpc_update_by_pirq(lpc, pirq);
275 /* return the pirq number (PIRQ[A-H]:0-7) corresponding to
276 * a given device irq pin.
278 int ich9_lpc_map_irq(PCIDevice *pci_dev, int intx)
280 BusState *bus = qdev_get_parent_bus(&pci_dev->qdev);
281 PCIBus *pci_bus = PCI_BUS(bus);
282 PCIDevice *lpc_pdev =
283 pci_bus->devices[PCI_DEVFN(ICH9_LPC_DEV, ICH9_LPC_FUNC)];
284 ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pdev);
286 return lpc->irr[PCI_SLOT(pci_dev->devfn)][intx];
289 static int ich9_lpc_sci_irq(ICH9LPCState *lpc)
291 switch (lpc->d.config[ICH9_LPC_ACPI_CTRL] &
292 ICH9_LPC_ACPI_CTRL_SCI_IRQ_SEL_MASK) {
293 case ICH9_LPC_ACPI_CTRL_9:
295 case ICH9_LPC_ACPI_CTRL_10:
297 case ICH9_LPC_ACPI_CTRL_11:
299 case ICH9_LPC_ACPI_CTRL_20:
301 case ICH9_LPC_ACPI_CTRL_21:
310 static void ich9_set_sci(void *opaque, int irq_num, int level)
312 ICH9LPCState *lpc = opaque;
315 assert(irq_num == 0);
317 if (level == lpc->sci_level) {
320 lpc->sci_level = level;
322 irq = ich9_lpc_sci_irq(lpc);
327 ich9_lpc_update_apic(lpc, irq);
328 if (irq < ICH9_LPC_PIC_NUM_PINS) {
329 ich9_lpc_update_pic(lpc, irq);
333 void ich9_lpc_pm_init(PCIDevice *lpc_pci, qemu_irq cmos_s3)
335 ICH9LPCState *lpc = ICH9_LPC_DEVICE(lpc_pci);
338 sci_irq = qemu_allocate_irqs(ich9_set_sci, lpc, 1);
339 ich9_pm_init(&lpc->pm, sci_irq[0], cmos_s3);
341 ich9_lpc_reset(&lpc->d.qdev);
346 static void ich9_apm_ctrl_changed(uint32_t val, void *arg)
348 ICH9LPCState *lpc = arg;
350 /* ACPI specs 3.0, 4.7.2.5 */
351 acpi_pm1_cnt_update(&lpc->pm.acpi_regs,
352 val == ICH9_APM_ACPI_ENABLE,
353 val == ICH9_APM_ACPI_DISABLE);
355 /* SMI_EN = PMBASE + 30. SMI control and enable register */
356 if (lpc->pm.smi_en & ICH9_PMIO_SMI_EN_APMC_EN) {
357 cpu_interrupt(first_cpu, CPU_INTERRUPT_SMI);
363 ich9_lpc_pmbase_update(ICH9LPCState *lpc)
365 uint32_t pm_io_base = pci_get_long(lpc->d.config + ICH9_LPC_PMBASE);
366 pm_io_base &= ICH9_LPC_PMBASE_BASE_ADDRESS_MASK;
368 ich9_pm_iospace_update(&lpc->pm, pm_io_base);
372 static void ich9_lpc_rcba_update(ICH9LPCState *lpc, uint32_t rbca_old)
374 uint32_t rbca = pci_get_long(lpc->d.config + ICH9_LPC_RCBA);
376 if (rbca_old & ICH9_LPC_RCBA_EN) {
377 memory_region_del_subregion(get_system_memory(), &lpc->rbca_mem);
379 if (rbca & ICH9_LPC_RCBA_EN) {
380 memory_region_add_subregion_overlap(get_system_memory(),
381 rbca & ICH9_LPC_RCBA_BA_MASK,
386 static int ich9_lpc_post_load(void *opaque, int version_id)
388 ICH9LPCState *lpc = opaque;
390 ich9_lpc_pmbase_update(lpc);
391 ich9_lpc_rcba_update(lpc, 0 /* disabled ICH9_LPC_RBCA_EN */);
395 static void ich9_lpc_config_write(PCIDevice *d,
396 uint32_t addr, uint32_t val, int len)
398 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
399 uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA);
401 pci_default_write_config(d, addr, val, len);
402 if (ranges_overlap(addr, len, ICH9_LPC_PMBASE, 4)) {
403 ich9_lpc_pmbase_update(lpc);
405 if (ranges_overlap(addr, len, ICH9_LPC_RCBA, 4)) {
406 ich9_lpc_rcba_update(lpc, rbca_old);
410 static void ich9_lpc_reset(DeviceState *qdev)
412 PCIDevice *d = PCI_DEVICE(qdev);
413 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
414 uint32_t rbca_old = pci_get_long(d->config + ICH9_LPC_RCBA);
417 for (i = 0; i < 4; i++) {
418 pci_set_byte(d->config + ICH9_LPC_PIRQA_ROUT + i,
419 ICH9_LPC_PIRQ_ROUT_DEFAULT);
421 for (i = 0; i < 4; i++) {
422 pci_set_byte(d->config + ICH9_LPC_PIRQE_ROUT + i,
423 ICH9_LPC_PIRQ_ROUT_DEFAULT);
425 pci_set_byte(d->config + ICH9_LPC_ACPI_CTRL, ICH9_LPC_ACPI_CTRL_DEFAULT);
427 pci_set_long(d->config + ICH9_LPC_PMBASE, ICH9_LPC_PMBASE_DEFAULT);
428 pci_set_long(d->config + ICH9_LPC_RCBA, ICH9_LPC_RCBA_DEFAULT);
432 ich9_lpc_pmbase_update(lpc);
433 ich9_lpc_rcba_update(lpc, rbca_old);
438 static const MemoryRegionOps rbca_mmio_ops = {
439 .read = ich9_cc_read,
440 .write = ich9_cc_write,
441 .endianness = DEVICE_LITTLE_ENDIAN,
444 static void ich9_lpc_machine_ready(Notifier *n, void *opaque)
446 ICH9LPCState *s = container_of(n, ICH9LPCState, machine_ready);
449 pci_conf = s->d.config;
450 if (isa_is_ioport_assigned(0x3f8)) {
452 pci_conf[0x82] |= 0x01;
454 if (isa_is_ioport_assigned(0x2f8)) {
456 pci_conf[0x82] |= 0x02;
458 if (isa_is_ioport_assigned(0x378)) {
460 pci_conf[0x82] |= 0x04;
462 if (isa_is_ioport_assigned(0x3f0)) {
464 pci_conf[0x82] |= 0x08;
468 static int ich9_lpc_initfn(PCIDevice *d)
470 ICH9LPCState *lpc = ICH9_LPC_DEVICE(d);
473 isa_bus = isa_bus_new(&d->qdev, get_system_io());
475 pci_set_long(d->wmask + ICH9_LPC_PMBASE,
476 ICH9_LPC_PMBASE_BASE_ADDRESS_MASK);
478 memory_region_init_io(&lpc->rbca_mem, &rbca_mmio_ops, lpc,
479 "lpc-rbca-mmio", ICH9_CC_SIZE);
481 lpc->isa_bus = isa_bus;
484 apm_init(d, &lpc->apm, ich9_apm_ctrl_changed, lpc);
486 lpc->machine_ready.notify = ich9_lpc_machine_ready;
487 qemu_add_machine_init_done_notifier(&lpc->machine_ready);
492 static const VMStateDescription vmstate_ich9_lpc = {
495 .minimum_version_id = 1,
496 .minimum_version_id_old = 1,
497 .post_load = ich9_lpc_post_load,
498 .fields = (VMStateField[]) {
499 VMSTATE_PCI_DEVICE(d, ICH9LPCState),
500 VMSTATE_STRUCT(apm, ICH9LPCState, 0, vmstate_apm, APMState),
501 VMSTATE_STRUCT(pm, ICH9LPCState, 0, vmstate_ich9_pm, ICH9LPCPMRegs),
502 VMSTATE_UINT8_ARRAY(chip_config, ICH9LPCState, ICH9_CC_SIZE),
503 VMSTATE_UINT32(sci_level, ICH9LPCState),
504 VMSTATE_END_OF_LIST()
508 static void ich9_lpc_class_init(ObjectClass *klass, void *data)
510 DeviceClass *dc = DEVICE_CLASS(klass);
511 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
513 dc->reset = ich9_lpc_reset;
514 k->init = ich9_lpc_initfn;
515 dc->vmsd = &vmstate_ich9_lpc;
517 k->config_write = ich9_lpc_config_write;
518 dc->desc = "ICH9 LPC bridge";
519 k->vendor_id = PCI_VENDOR_ID_INTEL;
520 k->device_id = PCI_DEVICE_ID_INTEL_ICH9_8;
521 k->revision = ICH9_A2_LPC_REVISION;
522 k->class_id = PCI_CLASS_BRIDGE_ISA;
526 static const TypeInfo ich9_lpc_info = {
527 .name = TYPE_ICH9_LPC_DEVICE,
528 .parent = TYPE_PCI_DEVICE,
529 .instance_size = sizeof(struct ICH9LPCState),
530 .class_init = ich9_lpc_class_init,
533 static void ich9_lpc_register(void)
535 type_register_static(&ich9_lpc_info);
538 type_init(ich9_lpc_register);