diff options
Diffstat (limited to 'hw/pci-host/dino.c')
| -rw-r--r-- | hw/pci-host/dino.c | 521 |
1 files changed, 521 insertions, 0 deletions
diff --git a/hw/pci-host/dino.c b/hw/pci-host/dino.c new file mode 100644 index 0000000000..f257c24e64 --- /dev/null +++ b/hw/pci-host/dino.c @@ -0,0 +1,521 @@ +/* + * 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) |