2 * HP-PARISC Dino PCI chipset emulation, as in B160L and similiar machines
6 * This work is licensed under the GNU GPL license version 2 or later.
8 * Documentation available at:
9 * https://parisc.wiki.kernel.org/images-parisc/9/91/Dino_ers.pdf
10 * https://parisc.wiki.kernel.org/images-parisc/7/70/Dino_3_1_Errata.pdf
13 #include "qemu/osdep.h"
14 #include "qemu/module.h"
15 #include "qemu/units.h"
16 #include "qapi/error.h"
19 #include "hw/pci/pci.h"
20 #include "hw/pci/pci_bus.h"
21 #include "migration/vmstate.h"
23 #include "exec/address-spaces.h"
27 #define TYPE_DINO_PCI_HOST_BRIDGE "dino-pcihost"
29 #define DINO_IAR0 0x004
30 #define DINO_IODC 0x008
31 #define DINO_IRR0 0x00C /* RO */
32 #define DINO_IAR1 0x010
33 #define DINO_IRR1 0x014 /* RO */
34 #define DINO_IMR 0x018
35 #define DINO_IPR 0x01C
36 #define DINO_TOC_ADDR 0x020
37 #define DINO_ICR 0x024
38 #define DINO_ILR 0x028 /* RO */
39 #define DINO_IO_COMMAND 0x030 /* WO */
40 #define DINO_IO_STATUS 0x034 /* RO */
41 #define DINO_IO_CONTROL 0x038
42 #define DINO_IO_GSC_ERR_RESP 0x040 /* RO */
43 #define DINO_IO_ERR_INFO 0x044 /* RO */
44 #define DINO_IO_PCI_ERR_RESP 0x048 /* RO */
45 #define DINO_IO_FBB_EN 0x05c
46 #define DINO_IO_ADDR_EN 0x060
47 #define DINO_PCI_CONFIG_ADDR 0x064
48 #define DINO_PCI_CONFIG_DATA 0x068
49 #define DINO_PCI_IO_DATA 0x06c
50 #define DINO_PCI_MEM_DATA 0x070 /* Dino 3.x only */
51 #define DINO_GSC2X_CONFIG 0x7b4 /* RO */
52 #define DINO_GMASK 0x800
53 #define DINO_PAMR 0x804
54 #define DINO_PAPR 0x808
55 #define DINO_DAMODE 0x80c
56 #define DINO_PCICMD 0x810
57 #define DINO_PCISTS 0x814 /* R/WC */
58 #define DINO_MLTIM 0x81c
59 #define DINO_BRDG_FEAT 0x820
60 #define DINO_PCIROR 0x824
61 #define DINO_PCIWOR 0x828
62 #define DINO_TLTIM 0x830
64 #define DINO_IRQS 11 /* bits 0-10 are architected */
65 #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */
66 #define DINO_LOCAL_IRQS (DINO_IRQS + 1)
67 #define DINO_MASK_IRQ(x) (1 << (x))
75 #define GSCEXTINT 0x040
76 /* #define xxx 0x080 - bit 7 is "default" */
77 /* #define xxx 0x100 - bit 8 not used */
78 /* #define xxx 0x200 - bit 9 not used */
79 #define RS232INT 0x400
81 #define DINO_MEM_CHUNK_SIZE (8 * MiB)
83 #define DINO_PCI_HOST_BRIDGE(obj) \
84 OBJECT_CHECK(DinoState, (obj), TYPE_DINO_PCI_HOST_BRIDGE)
86 #define DINO800_REGS (1 + (DINO_TLTIM - DINO_GMASK) / 4)
87 static const uint32_t reg800_keep_bits[DINO800_REGS] = {
88 MAKE_64BIT_MASK(0, 1), /* GMASK */
89 MAKE_64BIT_MASK(0, 7), /* PAMR */
90 MAKE_64BIT_MASK(0, 7), /* PAPR */
91 MAKE_64BIT_MASK(0, 8), /* DAMODE */
92 MAKE_64BIT_MASK(0, 7), /* PCICMD */
93 MAKE_64BIT_MASK(0, 9), /* PCISTS */
94 MAKE_64BIT_MASK(0, 32), /* Undefined */
95 MAKE_64BIT_MASK(0, 8), /* MLTIM */
96 MAKE_64BIT_MASK(0, 30), /* BRDG_FEAT */
97 MAKE_64BIT_MASK(0, 24), /* PCIROR */
98 MAKE_64BIT_MASK(0, 22), /* PCIWOR */
99 MAKE_64BIT_MASK(0, 32), /* Undocumented */
100 MAKE_64BIT_MASK(0, 9), /* TLTIM */
103 typedef struct DinoState {
104 PCIHostState parent_obj;
106 /* PCI_CONFIG_ADDR is parent_obj.config_reg, via pci_host_conf_be_ops,
107 so that we can map PCI_CONFIG_DATA to pci_host_data_be_ops. */
108 uint32_t config_reg_dino; /* keep original copy, including 2 lowest bits */
121 uint32_t reg800[DINO800_REGS];
123 MemoryRegion this_mem;
124 MemoryRegion pci_mem;
125 MemoryRegion pci_mem_alias[32];
129 MemoryRegion bm_ram_alias;
130 MemoryRegion bm_pci_alias;
131 MemoryRegion bm_cpu_alias;
135 * Dino can forward memory accesses from the CPU in the range between
136 * 0xf0800000 and 0xff000000 to the PCI bus.
138 static void gsc_to_pci_forwarding(DinoState *s)
140 uint32_t io_addr_en, tmp;
143 tmp = extract32(s->io_control, 7, 2);
144 enabled = (tmp == 0x01);
145 io_addr_en = s->io_addr_en;
146 /* Mask out first (=firmware) and last (=Dino) areas. */
147 io_addr_en &= ~(BIT(31) | BIT(0));
149 memory_region_transaction_begin();
150 for (i = 1; i < 31; i++) {
151 MemoryRegion *mem = &s->pci_mem_alias[i];
152 if (enabled && (io_addr_en & (1U << i))) {
153 if (!memory_region_is_mapped(mem)) {
154 uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE;
155 memory_region_add_subregion(get_system_memory(), addr, mem);
157 } else if (memory_region_is_mapped(mem)) {
158 memory_region_del_subregion(get_system_memory(), mem);
161 memory_region_transaction_commit();
164 static bool dino_chip_mem_valid(void *opaque, hwaddr addr,
165 unsigned size, bool is_write,
179 case DINO_IO_CONTROL:
181 case DINO_IO_ADDR_EN:
182 case DINO_PCI_IO_DATA:
184 case DINO_GMASK ... DINO_PCISTS:
185 case DINO_MLTIM ... DINO_PCIWOR:
189 case DINO_PCI_IO_DATA + 2:
192 case DINO_PCI_IO_DATA + 1:
193 case DINO_PCI_IO_DATA + 3:
196 trace_dino_chip_mem_valid(addr, ret);
200 static MemTxResult dino_chip_read_with_attrs(void *opaque, hwaddr addr,
201 uint64_t *data, unsigned size,
204 DinoState *s = opaque;
205 MemTxResult ret = MEMTX_OK;
211 case DINO_PCI_IO_DATA ... DINO_PCI_IO_DATA + 3:
212 /* Read from PCI IO space. */
213 io = &address_space_io;
214 ioaddr = s->parent_obj.config_reg + (addr & 3);
217 val = address_space_ldub(io, ioaddr, attrs, &ret);
220 val = address_space_lduw_be(io, ioaddr, attrs, &ret);
223 val = address_space_ldl_be(io, ioaddr, attrs, &ret);
226 g_assert_not_reached();
233 case DINO_IO_ADDR_EN:
236 case DINO_IO_CONTROL:
254 /* Any read to IPR clears the register. */
261 val = s->ilr & s->imr & ~s->icr;
264 val = s->ilr & s->imr & s->icr;
269 case DINO_GMASK ... DINO_TLTIM:
270 val = s->reg800[(addr - DINO_GMASK) / 4];
271 if (addr == DINO_PAMR) {
272 val &= ~0x01; /* LSB is hardwired to 0 */
274 if (addr == DINO_MLTIM) {
275 val &= ~0x07; /* 3 LSB are hardwired to 0 */
277 if (addr == DINO_BRDG_FEAT) {
278 val &= ~(0x10710E0ul | 8); /* bits 5-7, 24 & 15 reserved */
283 /* Controlled by dino_chip_mem_valid above. */
284 g_assert_not_reached();
287 trace_dino_chip_read(addr, val);
292 static MemTxResult dino_chip_write_with_attrs(void *opaque, hwaddr addr,
293 uint64_t val, unsigned size,
296 DinoState *s = opaque;
302 trace_dino_chip_write(addr, val);
305 case DINO_IO_DATA ... DINO_PCI_IO_DATA + 3:
306 /* Write into PCI IO space. */
307 io = &address_space_io;
308 ioaddr = s->parent_obj.config_reg + (addr & 3);
311 address_space_stb(io, ioaddr, val, attrs, &ret);
314 address_space_stw_be(io, ioaddr, val, attrs, &ret);
317 address_space_stl_be(io, ioaddr, val, attrs, &ret);
320 g_assert_not_reached();
325 s->io_fbb_en = val & 0x03;
327 case DINO_IO_ADDR_EN:
329 gsc_to_pci_forwarding(s);
331 case DINO_IO_CONTROL:
333 gsc_to_pci_forwarding(s);
349 /* Any write to IPR clears the register. */
353 /* IO_COMMAND of CPU with client_id bits */
354 s->toc_addr = 0xFFFA0030 | (val & 0x1e000);
360 /* These registers are read-only. */
363 case DINO_GMASK ... DINO_TLTIM:
364 i = (addr - DINO_GMASK) / 4;
365 val &= reg800_keep_bits[i];
370 /* Controlled by dino_chip_mem_valid above. */
371 g_assert_not_reached();
376 static const MemoryRegionOps dino_chip_ops = {
377 .read_with_attrs = dino_chip_read_with_attrs,
378 .write_with_attrs = dino_chip_write_with_attrs,
379 .endianness = DEVICE_BIG_ENDIAN,
381 .min_access_size = 1,
382 .max_access_size = 4,
383 .accepts = dino_chip_mem_valid,
386 .min_access_size = 1,
387 .max_access_size = 4,
391 static const VMStateDescription vmstate_dino = {
394 .minimum_version_id = 1,
395 .fields = (VMStateField[]) {
396 VMSTATE_UINT32(iar0, DinoState),
397 VMSTATE_UINT32(iar1, DinoState),
398 VMSTATE_UINT32(imr, DinoState),
399 VMSTATE_UINT32(ipr, DinoState),
400 VMSTATE_UINT32(icr, DinoState),
401 VMSTATE_UINT32(ilr, DinoState),
402 VMSTATE_UINT32(io_fbb_en, DinoState),
403 VMSTATE_UINT32(io_addr_en, DinoState),
404 VMSTATE_UINT32(io_control, DinoState),
405 VMSTATE_UINT32(toc_addr, DinoState),
406 VMSTATE_END_OF_LIST()
410 /* Unlike pci_config_data_le_ops, no check of high bit set in config_reg. */
412 static uint64_t dino_config_data_read(void *opaque, hwaddr addr, unsigned len)
414 PCIHostState *s = opaque;
415 return pci_data_read(s->bus, s->config_reg | (addr & 3), len);
418 static void dino_config_data_write(void *opaque, hwaddr addr,
419 uint64_t val, unsigned len)
421 PCIHostState *s = opaque;
422 pci_data_write(s->bus, s->config_reg | (addr & 3), val, len);
425 static const MemoryRegionOps dino_config_data_ops = {
426 .read = dino_config_data_read,
427 .write = dino_config_data_write,
428 .endianness = DEVICE_LITTLE_ENDIAN,
431 static uint64_t dino_config_addr_read(void *opaque, hwaddr addr, unsigned len)
433 DinoState *s = opaque;
434 return s->config_reg_dino;
437 static void dino_config_addr_write(void *opaque, hwaddr addr,
438 uint64_t val, unsigned len)
440 PCIHostState *s = opaque;
441 DinoState *ds = opaque;
442 ds->config_reg_dino = val; /* keep a copy of original value */
443 s->config_reg = val & ~3U;
446 static const MemoryRegionOps dino_config_addr_ops = {
447 .read = dino_config_addr_read,
448 .write = dino_config_addr_write,
449 .valid.min_access_size = 4,
450 .valid.max_access_size = 4,
451 .endianness = DEVICE_BIG_ENDIAN,
454 static AddressSpace *dino_pcihost_set_iommu(PCIBus *bus, void *opaque,
457 DinoState *s = opaque;
463 * Dino interrupts are connected as shown on Page 78, Table 23
464 * (Little-endian bit numbers)
471 * 6 GSC External Interrupt
472 * 7 Bus Error for "less than fatal" mode
478 static void dino_set_irq(void *opaque, int irq, int level)
480 DinoState *s = opaque;
481 uint32_t bit = 1u << irq;
482 uint32_t old_ilr = s->ilr;
485 uint32_t ena = bit & ~old_ilr;
487 s->ilr = old_ilr | bit;
489 uint32_t iar = (ena & s->icr ? s->iar1 : s->iar0);
490 stl_be_phys(&address_space_memory, iar & -32, iar & 31);
493 s->ilr = old_ilr & ~bit;
497 static int dino_pci_map_irq(PCIDevice *d, int irq_num)
499 int slot = d->devfn >> 3;
501 assert(irq_num >= 0 && irq_num <= 3);
506 static void dino_set_timer_irq(void *opaque, int irq, int level)
508 /* ??? Not connected. */
511 static void dino_set_serial_irq(void *opaque, int irq, int level)
513 dino_set_irq(opaque, 10, level);
516 PCIBus *dino_init(MemoryRegion *addr_space,
517 qemu_irq *p_rtc_irq, qemu_irq *p_ser_irq)
524 dev = qdev_create(NULL, TYPE_DINO_PCI_HOST_BRIDGE);
525 s = DINO_PCI_HOST_BRIDGE(dev);
526 s->iar0 = s->iar1 = CPU_HPA + 3;
527 s->toc_addr = 0xFFFA0030; /* IO_COMMAND of CPU */
529 /* Dino PCI access from main memory. */
530 memory_region_init_io(&s->this_mem, OBJECT(s), &dino_chip_ops,
532 memory_region_add_subregion(addr_space, DINO_HPA, &s->this_mem);
534 /* Dino PCI config. */
535 memory_region_init_io(&s->parent_obj.conf_mem, OBJECT(&s->parent_obj),
536 &dino_config_addr_ops, dev, "pci-conf-idx", 4);
537 memory_region_init_io(&s->parent_obj.data_mem, OBJECT(&s->parent_obj),
538 &dino_config_data_ops, dev, "pci-conf-data", 4);
539 memory_region_add_subregion(&s->this_mem, DINO_PCI_CONFIG_ADDR,
540 &s->parent_obj.conf_mem);
541 memory_region_add_subregion(&s->this_mem, DINO_CONFIG_DATA,
542 &s->parent_obj.data_mem);
544 /* Dino PCI bus memory. */
545 memory_region_init(&s->pci_mem, OBJECT(s), "pci-memory", 1ull << 32);
547 b = pci_register_root_bus(dev, "pci", dino_set_irq, dino_pci_map_irq, s,
548 &s->pci_mem, get_system_io(),
549 PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS);
550 s->parent_obj.bus = b;
551 qdev_init_nofail(dev);
553 /* Set up windows into PCI bus memory. */
554 for (i = 1; i < 31; i++) {
555 uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE;
556 char *name = g_strdup_printf("PCI Outbound Window %d", i);
557 memory_region_init_alias(&s->pci_mem_alias[i], OBJECT(s),
558 name, &s->pci_mem, addr,
559 DINO_MEM_CHUNK_SIZE);
563 /* Set up PCI view of memory: Bus master address space. */
564 memory_region_init(&s->bm, OBJECT(s), "bm-dino", 1ull << 32);
565 memory_region_init_alias(&s->bm_ram_alias, OBJECT(s),
566 "bm-system", addr_space, 0,
567 0xf0000000 + DINO_MEM_CHUNK_SIZE);
568 memory_region_init_alias(&s->bm_pci_alias, OBJECT(s),
569 "bm-pci", &s->pci_mem,
570 0xf0000000 + DINO_MEM_CHUNK_SIZE,
571 30 * DINO_MEM_CHUNK_SIZE);
572 memory_region_init_alias(&s->bm_cpu_alias, OBJECT(s),
573 "bm-cpu", addr_space, 0xfff00000,
575 memory_region_add_subregion(&s->bm, 0,
577 memory_region_add_subregion(&s->bm,
578 0xf0000000 + DINO_MEM_CHUNK_SIZE,
580 memory_region_add_subregion(&s->bm, 0xfff00000,
582 address_space_init(&s->bm_as, &s->bm, "pci-bm");
583 pci_setup_iommu(b, dino_pcihost_set_iommu, s);
585 *p_rtc_irq = qemu_allocate_irq(dino_set_timer_irq, s, 0);
586 *p_ser_irq = qemu_allocate_irq(dino_set_serial_irq, s, 0);
591 static void dino_pcihost_class_init(ObjectClass *klass, void *data)
593 DeviceClass *dc = DEVICE_CLASS(klass);
595 dc->vmsd = &vmstate_dino;
598 static const TypeInfo dino_pcihost_info = {
599 .name = TYPE_DINO_PCI_HOST_BRIDGE,
600 .parent = TYPE_PCI_HOST_BRIDGE,
601 .instance_size = sizeof(DinoState),
602 .class_init = dino_pcihost_class_init,
605 static void dino_register_types(void)
607 type_register_static(&dino_pcihost_info);
610 type_init(dino_register_types)