/* * HP-PARISC Dino PCI chipset emulation. * * (C) 2017 by Helge Deller * * 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 "cpu.h" #include "hw/hw.h" #include "hw/irq.h" #include "sysemu/sysemu.h" #include "hw/pci/pci.h" #include "hw/pci/pci_bus.h" #include "migration/vmstate.h" #include "hppa_sys.h" #include "exec/address-spaces.h" #define TYPE_DINO_PCI_HOST_BRIDGE "dino-pcihost" #define DINO_IAR0 0x004 #define DINO_IODC 0x008 #define DINO_IRR0 0x00C /* RO */ #define DINO_IAR1 0x010 #define DINO_IRR1 0x014 /* RO */ #define DINO_IMR 0x018 #define DINO_IPR 0x01C #define DINO_TOC_ADDR 0x020 #define DINO_ICR 0x024 #define DINO_ILR 0x028 /* RO */ #define DINO_IO_COMMAND 0x030 /* WO */ #define DINO_IO_STATUS 0x034 /* RO */ #define DINO_IO_CONTROL 0x038 #define DINO_IO_GSC_ERR_RESP 0x040 /* RO */ #define DINO_IO_ERR_INFO 0x044 /* RO */ #define DINO_IO_PCI_ERR_RESP 0x048 /* RO */ #define DINO_IO_FBB_EN 0x05c #define DINO_IO_ADDR_EN 0x060 #define DINO_PCI_CONFIG_ADDR 0x064 #define DINO_PCI_CONFIG_DATA 0x068 #define DINO_PCI_IO_DATA 0x06c #define DINO_PCI_MEM_DATA 0x070 /* Dino 3.x only */ #define DINO_GSC2X_CONFIG 0x7b4 /* RO */ #define DINO_GMASK 0x800 #define DINO_PAMR 0x804 #define DINO_PAPR 0x808 #define DINO_DAMODE 0x80c #define DINO_PCICMD 0x810 #define DINO_PCISTS 0x814 /* R/WC */ #define DINO_MLTIM 0x81c #define DINO_BRDG_FEAT 0x820 #define DINO_PCIROR 0x824 #define DINO_PCIWOR 0x828 #define DINO_TLTIM 0x830 #define DINO_IRQS 11 /* bits 0-10 are architected */ #define DINO_IRR_MASK 0x5ff /* only 10 bits are implemented */ #define DINO_LOCAL_IRQS (DINO_IRQS + 1) #define DINO_MASK_IRQ(x) (1 << (x)) #define PCIINTA 0x001 #define PCIINTB 0x002 #define PCIINTC 0x004 #define PCIINTD 0x008 #define PCIINTE 0x010 #define PCIINTF 0x020 #define GSCEXTINT 0x040 /* #define xxx 0x080 - bit 7 is "default" */ /* #define xxx 0x100 - bit 8 not used */ /* #define xxx 0x200 - bit 9 not used */ #define RS232INT 0x400 #define DINO_MEM_CHUNK_SIZE (8 * MiB) #define DINO_PCI_HOST_BRIDGE(obj) \ OBJECT_CHECK(DinoState, (obj), TYPE_DINO_PCI_HOST_BRIDGE) typedef struct DinoState { PCIHostState parent_obj; /* PCI_CONFIG_ADDR is parent_obj.config_reg, via pci_host_conf_be_ops, so that we can map PCI_CONFIG_DATA to pci_host_data_be_ops. */ uint32_t iar0; uint32_t iar1; uint32_t imr; uint32_t ipr; uint32_t icr; uint32_t ilr; uint32_t io_addr_en; uint32_t io_control; MemoryRegion this_mem; MemoryRegion pci_mem; MemoryRegion pci_mem_alias[32]; AddressSpace bm_as; MemoryRegion bm; MemoryRegion bm_ram_alias; MemoryRegion bm_pci_alias; MemoryRegion bm_cpu_alias; MemoryRegion cpu0_eir_mem; } DinoState; /* * 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; 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) { 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_ADDR_EN: case DINO_PCI_IO_DATA: return true; case DINO_PCI_IO_DATA + 2: return size <= 2; case DINO_PCI_IO_DATA + 1: case DINO_PCI_IO_DATA + 3: return size == 1; } return false; } static MemTxResult dino_chip_read_with_attrs(void *opaque, hwaddr addr, uint64_t *data, unsigned size, MemTxAttrs attrs) { DinoState *s = opaque; 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 = s->parent_obj.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_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; default: /* Controlled by dino_chip_mem_valid above. */ g_assert_not_reached(); } *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; AddressSpace *io; MemTxResult ret; uint16_t ioaddr; switch (addr) { case DINO_IO_DATA ... DINO_PCI_IO_DATA + 3: /* Write into PCI IO space. */ io = &address_space_io; ioaddr = s->parent_obj.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_ADDR_EN: /* Never allow first (=firmware) and last (=Dino) areas. */ s->io_addr_en = val & 0x7ffffffe; 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_ILR: case DINO_IRR0: case DINO_IRR1: /* These registers are read-only. */ 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 = 1, .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_addr_en, DinoState), VMSTATE_UINT32(io_control, 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) { PCIHostState *s = opaque; return s->config_reg; } static void dino_config_addr_write(void *opaque, hwaddr addr, uint64_t val, unsigned len) { PCIHostState *s = opaque; 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 = d->devfn >> 3; assert(irq_num >= 0 && irq_num <= 3); return slot & 0x03; } static void dino_set_timer_irq(void *opaque, int irq, int level) { /* ??? Not connected. */ } static void dino_set_serial_irq(void *opaque, int irq, int level) { dino_set_irq(opaque, 10, level); } PCIBus *dino_init(MemoryRegion *addr_space, qemu_irq *p_rtc_irq, qemu_irq *p_ser_irq) { DeviceState *dev; DinoState *s; PCIBus *b; int i; dev = qdev_create(NULL, TYPE_DINO_PCI_HOST_BRIDGE); s = DINO_PCI_HOST_BRIDGE(dev); /* Dino PCI access from main memory. */ memory_region_init_io(&s->this_mem, OBJECT(s), &dino_chip_ops, s, "dino", 4096); memory_region_add_subregion(addr_space, DINO_HPA, &s->this_mem); /* Dino PCI config. */ memory_region_init_io(&s->parent_obj.conf_mem, OBJECT(&s->parent_obj), &dino_config_addr_ops, dev, "pci-conf-idx", 4); memory_region_init_io(&s->parent_obj.data_mem, OBJECT(&s->parent_obj), &dino_config_data_ops, dev, "pci-conf-data", 4); memory_region_add_subregion(&s->this_mem, DINO_PCI_CONFIG_ADDR, &s->parent_obj.conf_mem); memory_region_add_subregion(&s->this_mem, DINO_CONFIG_DATA, &s->parent_obj.data_mem); /* Dino PCI bus memory. */ memory_region_init(&s->pci_mem, OBJECT(s), "pci-memory", 1ull << 32); b = pci_register_root_bus(dev, "pci", dino_set_irq, dino_pci_map_irq, s, &s->pci_mem, get_system_io(), PCI_DEVFN(0, 0), 32, TYPE_PCI_BUS); s->parent_obj.bus = b; qdev_init_nofail(dev); /* 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); } /* Set up PCI view of memory: Bus master address space. */ memory_region_init(&s->bm, OBJECT(s), "bm-dino", 1ull << 32); memory_region_init_alias(&s->bm_ram_alias, OBJECT(s), "bm-system", addr_space, 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", addr_space, 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"); pci_setup_iommu(b, dino_pcihost_set_iommu, s); *p_rtc_irq = qemu_allocate_irq(dino_set_timer_irq, s, 0); *p_ser_irq = qemu_allocate_irq(dino_set_serial_irq, s, 0); return b; } static void dino_pcihost_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); dc->vmsd = &vmstate_dino; } static const TypeInfo dino_pcihost_info = { .name = TYPE_DINO_PCI_HOST_BRIDGE, .parent = TYPE_PCI_HOST_BRIDGE, .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)