| /* |
| * HP-PARISC Dino PCI chipset emulation, as in B160L and similiar machines |
| * |
| * (C) 2017-2019 by Helge Deller <deller@gmx.de> |
| * |
| * This work is licensed under the GNU GPL license version 2 or later. |
| * |
| * Documentation available at: |
| * https://parisc.wiki.kernel.org/images-parisc/9/91/Dino_ers.pdf |
| * https://parisc.wiki.kernel.org/images-parisc/7/70/Dino_3_1_Errata.pdf |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "qemu/module.h" |
| #include "qemu/units.h" |
| #include "qapi/error.h" |
| #include "hw/irq.h" |
| #include "hw/pci/pci.h" |
| #include "hw/pci/pci_bus.h" |
| #include "hw/qdev-properties.h" |
| #include "hw/pci-host/dino.h" |
| #include "migration/vmstate.h" |
| #include "trace.h" |
| #include "qom/object.h" |
| |
| |
| /* |
| * Dino can forward memory accesses from the CPU in the range between |
| * 0xf0800000 and 0xff000000 to the PCI bus. |
| */ |
| static void gsc_to_pci_forwarding(DinoState *s) |
| { |
| uint32_t io_addr_en, tmp; |
| int enabled, i; |
| |
| tmp = extract32(s->io_control, 7, 2); |
| enabled = (tmp == 0x01); |
| io_addr_en = s->io_addr_en; |
| /* Mask out first (=firmware) and last (=Dino) areas. */ |
| io_addr_en &= ~(BIT(31) | BIT(0)); |
| |
| memory_region_transaction_begin(); |
| for (i = 1; i < 31; i++) { |
| MemoryRegion *mem = &s->pci_mem_alias[i]; |
| if (enabled && (io_addr_en & (1U << i))) { |
| if (!memory_region_is_mapped(mem)) { |
| uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; |
| memory_region_add_subregion(get_system_memory(), addr, mem); |
| } |
| } else if (memory_region_is_mapped(mem)) { |
| memory_region_del_subregion(get_system_memory(), mem); |
| } |
| } |
| memory_region_transaction_commit(); |
| } |
| |
| static bool dino_chip_mem_valid(void *opaque, hwaddr addr, |
| unsigned size, bool is_write, |
| MemTxAttrs attrs) |
| { |
| bool ret = false; |
| |
| switch (addr) { |
| case DINO_IAR0: |
| case DINO_IAR1: |
| case DINO_IRR0: |
| case DINO_IRR1: |
| case DINO_IMR: |
| case DINO_IPR: |
| case DINO_ICR: |
| case DINO_ILR: |
| case DINO_IO_CONTROL: |
| case DINO_IO_FBB_EN: |
| case DINO_IO_ADDR_EN: |
| case DINO_PCI_IO_DATA: |
| case DINO_TOC_ADDR: |
| case DINO_GMASK ... DINO_PCISTS: |
| case DINO_MLTIM ... DINO_PCIWOR: |
| case DINO_TLTIM: |
| ret = true; |
| break; |
| case DINO_PCI_IO_DATA + 2: |
| ret = (size <= 2); |
| break; |
| case DINO_PCI_IO_DATA + 1: |
| case DINO_PCI_IO_DATA + 3: |
| ret = (size == 1); |
| } |
| trace_dino_chip_mem_valid(addr, ret); |
| return ret; |
| } |
| |
| static MemTxResult dino_chip_read_with_attrs(void *opaque, hwaddr addr, |
| uint64_t *data, unsigned size, |
| MemTxAttrs attrs) |
| { |
| DinoState *s = opaque; |
| PCIHostState *phb = PCI_HOST_BRIDGE(s); |
| MemTxResult ret = MEMTX_OK; |
| AddressSpace *io; |
| uint16_t ioaddr; |
| uint32_t val; |
| |
| switch (addr) { |
| case DINO_PCI_IO_DATA ... DINO_PCI_IO_DATA + 3: |
| /* Read from PCI IO space. */ |
| io = &address_space_io; |
| ioaddr = phb->config_reg + (addr & 3); |
| switch (size) { |
| case 1: |
| val = address_space_ldub(io, ioaddr, attrs, &ret); |
| break; |
| case 2: |
| val = address_space_lduw_be(io, ioaddr, attrs, &ret); |
| break; |
| case 4: |
| val = address_space_ldl_be(io, ioaddr, attrs, &ret); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| break; |
| |
| case DINO_IO_FBB_EN: |
| val = s->io_fbb_en; |
| break; |
| case DINO_IO_ADDR_EN: |
| val = s->io_addr_en; |
| break; |
| case DINO_IO_CONTROL: |
| val = s->io_control; |
| break; |
| |
| case DINO_IAR0: |
| val = s->iar0; |
| break; |
| case DINO_IAR1: |
| val = s->iar1; |
| break; |
| case DINO_IMR: |
| val = s->imr; |
| break; |
| case DINO_ICR: |
| val = s->icr; |
| break; |
| case DINO_IPR: |
| val = s->ipr; |
| /* Any read to IPR clears the register. */ |
| s->ipr = 0; |
| break; |
| case DINO_ILR: |
| val = s->ilr; |
| break; |
| case DINO_IRR0: |
| val = s->ilr & s->imr & ~s->icr; |
| break; |
| case DINO_IRR1: |
| val = s->ilr & s->imr & s->icr; |
| break; |
| case DINO_TOC_ADDR: |
| val = s->toc_addr; |
| break; |
| case DINO_GMASK ... DINO_TLTIM: |
| val = s->reg800[(addr - DINO_GMASK) / 4]; |
| if (addr == DINO_PAMR) { |
| val &= ~0x01; /* LSB is hardwired to 0 */ |
| } |
| if (addr == DINO_MLTIM) { |
| val &= ~0x07; /* 3 LSB are hardwired to 0 */ |
| } |
| if (addr == DINO_BRDG_FEAT) { |
| val &= ~(0x10710E0ul | 8); /* bits 5-7, 24 & 15 reserved */ |
| } |
| break; |
| |
| default: |
| /* Controlled by dino_chip_mem_valid above. */ |
| g_assert_not_reached(); |
| } |
| |
| trace_dino_chip_read(addr, val); |
| *data = val; |
| return ret; |
| } |
| |
| static MemTxResult dino_chip_write_with_attrs(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size, |
| MemTxAttrs attrs) |
| { |
| DinoState *s = opaque; |
| PCIHostState *phb = PCI_HOST_BRIDGE(s); |
| AddressSpace *io; |
| MemTxResult ret; |
| uint16_t ioaddr; |
| int i; |
| |
| trace_dino_chip_write(addr, val); |
| |
| switch (addr) { |
| case DINO_IO_DATA ... DINO_PCI_IO_DATA + 3: |
| /* Write into PCI IO space. */ |
| io = &address_space_io; |
| ioaddr = phb->config_reg + (addr & 3); |
| switch (size) { |
| case 1: |
| address_space_stb(io, ioaddr, val, attrs, &ret); |
| break; |
| case 2: |
| address_space_stw_be(io, ioaddr, val, attrs, &ret); |
| break; |
| case 4: |
| address_space_stl_be(io, ioaddr, val, attrs, &ret); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| return ret; |
| |
| case DINO_IO_FBB_EN: |
| s->io_fbb_en = val & 0x03; |
| break; |
| case DINO_IO_ADDR_EN: |
| s->io_addr_en = val; |
| gsc_to_pci_forwarding(s); |
| break; |
| case DINO_IO_CONTROL: |
| s->io_control = val; |
| gsc_to_pci_forwarding(s); |
| break; |
| |
| case DINO_IAR0: |
| s->iar0 = val; |
| break; |
| case DINO_IAR1: |
| s->iar1 = val; |
| break; |
| case DINO_IMR: |
| s->imr = val; |
| break; |
| case DINO_ICR: |
| s->icr = val; |
| break; |
| case DINO_IPR: |
| /* Any write to IPR clears the register. */ |
| s->ipr = 0; |
| break; |
| case DINO_TOC_ADDR: |
| /* IO_COMMAND of CPU with client_id bits */ |
| s->toc_addr = 0xFFFA0030 | (val & 0x1e000); |
| break; |
| |
| case DINO_ILR: |
| case DINO_IRR0: |
| case DINO_IRR1: |
| /* These registers are read-only. */ |
| break; |
| |
| case DINO_GMASK ... DINO_TLTIM: |
| i = (addr - DINO_GMASK) / 4; |
| val &= reg800_keep_bits[i]; |
| s->reg800[i] = val; |
| break; |
| |
| default: |
| /* Controlled by dino_chip_mem_valid above. */ |
| g_assert_not_reached(); |
| } |
| return MEMTX_OK; |
| } |
| |
| static const MemoryRegionOps dino_chip_ops = { |
| .read_with_attrs = dino_chip_read_with_attrs, |
| .write_with_attrs = dino_chip_write_with_attrs, |
| .endianness = DEVICE_BIG_ENDIAN, |
| .valid = { |
| .min_access_size = 1, |
| .max_access_size = 4, |
| .accepts = dino_chip_mem_valid, |
| }, |
| .impl = { |
| .min_access_size = 1, |
| .max_access_size = 4, |
| }, |
| }; |
| |
| static const VMStateDescription vmstate_dino = { |
| .name = "Dino", |
| .version_id = 2, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(iar0, DinoState), |
| VMSTATE_UINT32(iar1, DinoState), |
| VMSTATE_UINT32(imr, DinoState), |
| VMSTATE_UINT32(ipr, DinoState), |
| VMSTATE_UINT32(icr, DinoState), |
| VMSTATE_UINT32(ilr, DinoState), |
| VMSTATE_UINT32(io_fbb_en, DinoState), |
| VMSTATE_UINT32(io_addr_en, DinoState), |
| VMSTATE_UINT32(io_control, DinoState), |
| VMSTATE_UINT32(toc_addr, DinoState), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| /* Unlike pci_config_data_le_ops, no check of high bit set in config_reg. */ |
| |
| static uint64_t dino_config_data_read(void *opaque, hwaddr addr, unsigned len) |
| { |
| PCIHostState *s = opaque; |
| return pci_data_read(s->bus, s->config_reg | (addr & 3), len); |
| } |
| |
| static void dino_config_data_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned len) |
| { |
| PCIHostState *s = opaque; |
| pci_data_write(s->bus, s->config_reg | (addr & 3), val, len); |
| } |
| |
| static const MemoryRegionOps dino_config_data_ops = { |
| .read = dino_config_data_read, |
| .write = dino_config_data_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| static uint64_t dino_config_addr_read(void *opaque, hwaddr addr, unsigned len) |
| { |
| DinoState *s = opaque; |
| return s->config_reg_dino; |
| } |
| |
| static void dino_config_addr_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned len) |
| { |
| PCIHostState *s = opaque; |
| DinoState *ds = opaque; |
| ds->config_reg_dino = val; /* keep a copy of original value */ |
| s->config_reg = val & ~3U; |
| } |
| |
| static const MemoryRegionOps dino_config_addr_ops = { |
| .read = dino_config_addr_read, |
| .write = dino_config_addr_write, |
| .valid.min_access_size = 4, |
| .valid.max_access_size = 4, |
| .endianness = DEVICE_BIG_ENDIAN, |
| }; |
| |
| static AddressSpace *dino_pcihost_set_iommu(PCIBus *bus, void *opaque, |
| int devfn) |
| { |
| DinoState *s = opaque; |
| |
| return &s->bm_as; |
| } |
| |
| /* |
| * Dino interrupts are connected as shown on Page 78, Table 23 |
| * (Little-endian bit numbers) |
| * 0 PCI INTA |
| * 1 PCI INTB |
| * 2 PCI INTC |
| * 3 PCI INTD |
| * 4 PCI INTE |
| * 5 PCI INTF |
| * 6 GSC External Interrupt |
| * 7 Bus Error for "less than fatal" mode |
| * 8 PS2 |
| * 9 Unused |
| * 10 RS232 |
| */ |
| |
| static void dino_set_irq(void *opaque, int irq, int level) |
| { |
| DinoState *s = opaque; |
| uint32_t bit = 1u << irq; |
| uint32_t old_ilr = s->ilr; |
| |
| if (level) { |
| uint32_t ena = bit & ~old_ilr; |
| s->ipr |= ena; |
| s->ilr = old_ilr | bit; |
| if (ena & s->imr) { |
| uint32_t iar = (ena & s->icr ? s->iar1 : s->iar0); |
| stl_be_phys(&address_space_memory, iar & -32, iar & 31); |
| } |
| } else { |
| s->ilr = old_ilr & ~bit; |
| } |
| } |
| |
| static int dino_pci_map_irq(PCIDevice *d, int irq_num) |
| { |
| int slot = PCI_SLOT(d->devfn); |
| |
| assert(irq_num >= 0 && irq_num <= 3); |
| |
| return slot & 0x03; |
| } |
| |
| static void dino_pcihost_reset(DeviceState *dev) |
| { |
| DinoState *s = DINO_PCI_HOST_BRIDGE(dev); |
| |
| s->iar0 = s->iar1 = 0xFFFB0000 + 3; /* CPU_HPA + 3 */ |
| s->toc_addr = 0xFFFA0030; /* IO_COMMAND of CPU */ |
| } |
| |
| static void dino_pcihost_realize(DeviceState *dev, Error **errp) |
| { |
| DinoState *s = DINO_PCI_HOST_BRIDGE(dev); |
| |
| /* Set up PCI view of memory: Bus master address space. */ |
| memory_region_init(&s->bm, OBJECT(s), "bm-dino", 4 * GiB); |
| memory_region_init_alias(&s->bm_ram_alias, OBJECT(s), |
| "bm-system", s->memory_as, 0, |
| 0xf0000000 + DINO_MEM_CHUNK_SIZE); |
| memory_region_init_alias(&s->bm_pci_alias, OBJECT(s), |
| "bm-pci", &s->pci_mem, |
| 0xf0000000 + DINO_MEM_CHUNK_SIZE, |
| 30 * DINO_MEM_CHUNK_SIZE); |
| memory_region_init_alias(&s->bm_cpu_alias, OBJECT(s), |
| "bm-cpu", s->memory_as, 0xfff00000, |
| 0xfffff); |
| memory_region_add_subregion(&s->bm, 0, |
| &s->bm_ram_alias); |
| memory_region_add_subregion(&s->bm, |
| 0xf0000000 + DINO_MEM_CHUNK_SIZE, |
| &s->bm_pci_alias); |
| memory_region_add_subregion(&s->bm, 0xfff00000, |
| &s->bm_cpu_alias); |
| |
| address_space_init(&s->bm_as, &s->bm, "pci-bm"); |
| } |
| |
| static void dino_pcihost_unrealize(DeviceState *dev) |
| { |
| DinoState *s = DINO_PCI_HOST_BRIDGE(dev); |
| |
| address_space_destroy(&s->bm_as); |
| } |
| |
| static void dino_pcihost_init(Object *obj) |
| { |
| DinoState *s = DINO_PCI_HOST_BRIDGE(obj); |
| PCIHostState *phb = PCI_HOST_BRIDGE(obj); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(obj); |
| int i; |
| |
| /* Dino PCI access from main memory. */ |
| memory_region_init_io(&s->this_mem, OBJECT(s), &dino_chip_ops, |
| s, "dino", 4096); |
| |
| /* Dino PCI config. */ |
| memory_region_init_io(&phb->conf_mem, OBJECT(phb), |
| &dino_config_addr_ops, DEVICE(s), |
| "pci-conf-idx", 4); |
| memory_region_init_io(&phb->data_mem, OBJECT(phb), |
| &dino_config_data_ops, DEVICE(s), |
| "pci-conf-data", 4); |
| memory_region_add_subregion(&s->this_mem, DINO_PCI_CONFIG_ADDR, |
| &phb->conf_mem); |
| memory_region_add_subregion(&s->this_mem, DINO_CONFIG_DATA, |
| &phb->data_mem); |
| |
| /* Dino PCI bus memory. */ |
| memory_region_init(&s->pci_mem, OBJECT(s), "pci-memory", 4 * GiB); |
| |
| phb->bus = pci_register_root_bus(DEVICE(s), "pci", |
| dino_set_irq, dino_pci_map_irq, s, |
| &s->pci_mem, get_system_io(), |
| PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS); |
| |
| /* Set up windows into PCI bus memory. */ |
| for (i = 1; i < 31; i++) { |
| uint32_t addr = 0xf0000000 + i * DINO_MEM_CHUNK_SIZE; |
| char *name = g_strdup_printf("PCI Outbound Window %d", i); |
| memory_region_init_alias(&s->pci_mem_alias[i], OBJECT(s), |
| name, &s->pci_mem, addr, |
| DINO_MEM_CHUNK_SIZE); |
| g_free(name); |
| } |
| |
| pci_setup_iommu(phb->bus, dino_pcihost_set_iommu, s); |
| |
| sysbus_init_mmio(sbd, &s->this_mem); |
| |
| qdev_init_gpio_in(DEVICE(obj), dino_set_irq, DINO_IRQS); |
| } |
| |
| static Property dino_pcihost_properties[] = { |
| DEFINE_PROP_LINK("memory-as", DinoState, memory_as, TYPE_MEMORY_REGION, |
| MemoryRegion *), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void dino_pcihost_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| dc->reset = dino_pcihost_reset; |
| dc->realize = dino_pcihost_realize; |
| dc->unrealize = dino_pcihost_unrealize; |
| device_class_set_props(dc, dino_pcihost_properties); |
| dc->vmsd = &vmstate_dino; |
| } |
| |
| static const TypeInfo dino_pcihost_info = { |
| .name = TYPE_DINO_PCI_HOST_BRIDGE, |
| .parent = TYPE_PCI_HOST_BRIDGE, |
| .instance_init = dino_pcihost_init, |
| .instance_size = sizeof(DinoState), |
| .class_init = dino_pcihost_class_init, |
| }; |
| |
| static void dino_register_types(void) |
| { |
| type_register_static(&dino_pcihost_info); |
| } |
| |
| type_init(dino_register_types) |
