| /* |
| * QEMU Ultrasparc Sabre PCI host (PBM) |
| * |
| * Copyright (c) 2006 Fabrice Bellard |
| * Copyright (c) 2012,2013 Artyom Tarasenko |
| * Copyright (c) 2018 Mark Cave-Ayland |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "hw/sysbus.h" |
| #include "hw/pci/pci.h" |
| #include "hw/pci/pci_host.h" |
| #include "hw/qdev-properties.h" |
| #include "hw/pci/pci_bridge.h" |
| #include "hw/pci/pci_bus.h" |
| #include "hw/irq.h" |
| #include "hw/pci-bridge/simba.h" |
| #include "hw/pci-host/sabre.h" |
| #include "exec/address-spaces.h" |
| #include "qapi/error.h" |
| #include "qemu/log.h" |
| #include "qemu/module.h" |
| #include "sysemu/runstate.h" |
| #include "trace.h" |
| |
| /* |
| * Chipset docs: |
| * PBM: "UltraSPARC IIi User's Manual", |
| * http://www.sun.com/processors/manuals/805-0087.pdf |
| */ |
| |
| #define PBM_PCI_IMR_MASK 0x7fffffff |
| #define PBM_PCI_IMR_ENABLED 0x80000000 |
| |
| #define POR (1U << 31) |
| #define SOFT_POR (1U << 30) |
| #define SOFT_XIR (1U << 29) |
| #define BTN_POR (1U << 28) |
| #define BTN_XIR (1U << 27) |
| #define RESET_MASK 0xf8000000 |
| #define RESET_WCMASK 0x98000000 |
| #define RESET_WMASK 0x60000000 |
| |
| #define NO_IRQ_REQUEST (MAX_IVEC + 1) |
| |
| static inline void sabre_set_request(SabreState *s, unsigned int irq_num) |
| { |
| trace_sabre_set_request(irq_num); |
| s->irq_request = irq_num; |
| qemu_set_irq(s->ivec_irqs[irq_num], 1); |
| } |
| |
| static inline void sabre_check_irqs(SabreState *s) |
| { |
| unsigned int i; |
| |
| /* Previous request is not acknowledged, resubmit */ |
| if (s->irq_request != NO_IRQ_REQUEST) { |
| sabre_set_request(s, s->irq_request); |
| return; |
| } |
| /* no request pending */ |
| if (s->pci_irq_in == 0ULL) { |
| return; |
| } |
| for (i = 0; i < 32; i++) { |
| if (s->pci_irq_in & (1ULL << i)) { |
| if (s->pci_irq_map[i >> 2] & PBM_PCI_IMR_ENABLED) { |
| sabre_set_request(s, i); |
| return; |
| } |
| } |
| } |
| for (i = 32; i < 64; i++) { |
| if (s->pci_irq_in & (1ULL << i)) { |
| if (s->obio_irq_map[i - 32] & PBM_PCI_IMR_ENABLED) { |
| sabre_set_request(s, i); |
| break; |
| } |
| } |
| } |
| } |
| |
| static inline void sabre_clear_request(SabreState *s, unsigned int irq_num) |
| { |
| trace_sabre_clear_request(irq_num); |
| qemu_set_irq(s->ivec_irqs[irq_num], 0); |
| s->irq_request = NO_IRQ_REQUEST; |
| } |
| |
| static AddressSpace *sabre_pci_dma_iommu(PCIBus *bus, void *opaque, int devfn) |
| { |
| IOMMUState *is = opaque; |
| |
| return &is->iommu_as; |
| } |
| |
| static void sabre_config_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| SabreState *s = opaque; |
| |
| trace_sabre_config_write(addr, val); |
| |
| switch (addr & 0xffff) { |
| case 0x30 ... 0x4f: /* DMA error registers */ |
| /* XXX: not implemented yet */ |
| break; |
| case 0xc00 ... 0xc3f: /* PCI interrupt control */ |
| if (addr & 4) { |
| unsigned int ino = (addr & 0x3f) >> 3; |
| s->pci_irq_map[ino] &= PBM_PCI_IMR_MASK; |
| s->pci_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; |
| if ((s->irq_request == ino) && !(val & ~PBM_PCI_IMR_MASK)) { |
| sabre_clear_request(s, ino); |
| } |
| sabre_check_irqs(s); |
| } |
| break; |
| case 0x1000 ... 0x107f: /* OBIO interrupt control */ |
| if (addr & 4) { |
| unsigned int ino = ((addr & 0xff) >> 3); |
| s->obio_irq_map[ino] &= PBM_PCI_IMR_MASK; |
| s->obio_irq_map[ino] |= val & ~PBM_PCI_IMR_MASK; |
| if ((s->irq_request == (ino | 0x20)) |
| && !(val & ~PBM_PCI_IMR_MASK)) { |
| sabre_clear_request(s, ino | 0x20); |
| } |
| sabre_check_irqs(s); |
| } |
| break; |
| case 0x1400 ... 0x14ff: /* PCI interrupt clear */ |
| if (addr & 4) { |
| unsigned int ino = (addr & 0xff) >> 5; |
| if ((s->irq_request / 4) == ino) { |
| sabre_clear_request(s, s->irq_request); |
| sabre_check_irqs(s); |
| } |
| } |
| break; |
| case 0x1800 ... 0x1860: /* OBIO interrupt clear */ |
| if (addr & 4) { |
| unsigned int ino = ((addr & 0xff) >> 3) | 0x20; |
| if (s->irq_request == ino) { |
| sabre_clear_request(s, ino); |
| sabre_check_irqs(s); |
| } |
| } |
| break; |
| case 0x2000 ... 0x202f: /* PCI control */ |
| s->pci_control[(addr & 0x3f) >> 2] = val; |
| break; |
| case 0xf020 ... 0xf027: /* Reset control */ |
| if (addr & 4) { |
| val &= RESET_MASK; |
| s->reset_control &= ~(val & RESET_WCMASK); |
| s->reset_control |= val & RESET_WMASK; |
| if (val & SOFT_POR) { |
| s->nr_resets = 0; |
| qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
| } else if (val & SOFT_XIR) { |
| qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); |
| } |
| } |
| break; |
| case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ |
| case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ |
| case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ |
| case 0xf000 ... 0xf01f: /* FFB config, memory control */ |
| /* we don't care */ |
| default: |
| break; |
| } |
| } |
| |
| static uint64_t sabre_config_read(void *opaque, |
| hwaddr addr, unsigned size) |
| { |
| SabreState *s = opaque; |
| uint32_t val; |
| |
| switch (addr & 0xffff) { |
| case 0x30 ... 0x4f: /* DMA error registers */ |
| val = 0; |
| /* XXX: not implemented yet */ |
| break; |
| case 0xc00 ... 0xc3f: /* PCI interrupt control */ |
| if (addr & 4) { |
| val = s->pci_irq_map[(addr & 0x3f) >> 3]; |
| } else { |
| val = 0; |
| } |
| break; |
| case 0x1000 ... 0x107f: /* OBIO interrupt control */ |
| if (addr & 4) { |
| val = s->obio_irq_map[(addr & 0xff) >> 3]; |
| } else { |
| val = 0; |
| } |
| break; |
| case 0x1080 ... 0x108f: /* PCI bus error */ |
| if (addr & 4) { |
| val = s->pci_err_irq_map[(addr & 0xf) >> 3]; |
| } else { |
| val = 0; |
| } |
| break; |
| case 0x2000 ... 0x202f: /* PCI control */ |
| val = s->pci_control[(addr & 0x3f) >> 2]; |
| break; |
| case 0xf020 ... 0xf027: /* Reset control */ |
| if (addr & 4) { |
| val = s->reset_control; |
| } else { |
| val = 0; |
| } |
| break; |
| case 0x5000 ... 0x51cf: /* PIO/DMA diagnostics */ |
| case 0xa400 ... 0xa67f: /* IOMMU diagnostics */ |
| case 0xa800 ... 0xa80f: /* Interrupt diagnostics */ |
| case 0xf000 ... 0xf01f: /* FFB config, memory control */ |
| /* we don't care */ |
| default: |
| val = 0; |
| break; |
| } |
| trace_sabre_config_read(addr, val); |
| |
| return val; |
| } |
| |
| static const MemoryRegionOps sabre_config_ops = { |
| .read = sabre_config_read, |
| .write = sabre_config_write, |
| .endianness = DEVICE_BIG_ENDIAN, |
| }; |
| |
| static void sabre_pci_config_write(void *opaque, hwaddr addr, |
| uint64_t val, unsigned size) |
| { |
| SabreState *s = opaque; |
| PCIHostState *phb = PCI_HOST_BRIDGE(s); |
| |
| trace_sabre_pci_config_write(addr, val); |
| pci_data_write(phb->bus, addr, val, size); |
| } |
| |
| static uint64_t sabre_pci_config_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| uint32_t ret; |
| SabreState *s = opaque; |
| PCIHostState *phb = PCI_HOST_BRIDGE(s); |
| |
| ret = pci_data_read(phb->bus, addr, size); |
| trace_sabre_pci_config_read(addr, ret); |
| return ret; |
| } |
| |
| /* The sabre host has an IRQ line for each IRQ line of each slot. */ |
| static int pci_sabre_map_irq(PCIDevice *pci_dev, int irq_num) |
| { |
| /* Return the irq as swizzled by the PBM */ |
| return irq_num; |
| } |
| |
| static int pci_simbaA_map_irq(PCIDevice *pci_dev, int irq_num) |
| { |
| /* The on-board devices have fixed (legacy) OBIO intnos */ |
| switch (PCI_SLOT(pci_dev->devfn)) { |
| case 1: |
| /* Onboard NIC */ |
| return OBIO_NIC_IRQ; |
| case 3: |
| /* Onboard IDE */ |
| return OBIO_HDD_IRQ; |
| default: |
| /* Normal intno, fall through */ |
| break; |
| } |
| |
| return ((PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; |
| } |
| |
| static int pci_simbaB_map_irq(PCIDevice *pci_dev, int irq_num) |
| { |
| return (0x10 + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; |
| } |
| |
| static void pci_sabre_set_irq(void *opaque, int irq_num, int level) |
| { |
| SabreState *s = opaque; |
| |
| trace_sabre_pci_set_irq(irq_num, level); |
| |
| /* PCI IRQ map onto the first 32 INO. */ |
| if (irq_num < 32) { |
| if (level) { |
| s->pci_irq_in |= 1ULL << irq_num; |
| if (s->pci_irq_map[irq_num >> 2] & PBM_PCI_IMR_ENABLED) { |
| sabre_set_request(s, irq_num); |
| } |
| } else { |
| s->pci_irq_in &= ~(1ULL << irq_num); |
| } |
| } else { |
| /* OBIO IRQ map onto the next 32 INO. */ |
| if (level) { |
| trace_sabre_pci_set_obio_irq(irq_num, level); |
| s->pci_irq_in |= 1ULL << irq_num; |
| if ((s->irq_request == NO_IRQ_REQUEST) |
| && (s->obio_irq_map[irq_num - 32] & PBM_PCI_IMR_ENABLED)) { |
| sabre_set_request(s, irq_num); |
| } |
| } else { |
| s->pci_irq_in &= ~(1ULL << irq_num); |
| } |
| } |
| } |
| |
| static void sabre_reset(DeviceState *d) |
| { |
| SabreState *s = SABRE_DEVICE(d); |
| PCIDevice *pci_dev; |
| unsigned int i; |
| uint16_t cmd; |
| |
| for (i = 0; i < 8; i++) { |
| s->pci_irq_map[i] &= PBM_PCI_IMR_MASK; |
| } |
| for (i = 0; i < 32; i++) { |
| s->obio_irq_map[i] &= PBM_PCI_IMR_MASK; |
| } |
| |
| s->irq_request = NO_IRQ_REQUEST; |
| s->pci_irq_in = 0ULL; |
| |
| if (s->nr_resets++ == 0) { |
| /* Power on reset */ |
| s->reset_control = POR; |
| } |
| |
| /* As this is the busA PCI bridge which contains the on-board devices |
| * attached to the ebus, ensure that we initially allow IO transactions |
| * so that we get the early serial console until OpenBIOS can properly |
| * configure the PCI bridge itself */ |
| pci_dev = PCI_DEVICE(s->bridgeA); |
| cmd = pci_get_word(pci_dev->config + PCI_COMMAND); |
| pci_set_word(pci_dev->config + PCI_COMMAND, cmd | PCI_COMMAND_IO); |
| pci_bridge_update_mappings(PCI_BRIDGE(pci_dev)); |
| } |
| |
| static const MemoryRegionOps pci_config_ops = { |
| .read = sabre_pci_config_read, |
| .write = sabre_pci_config_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| static void sabre_realize(DeviceState *dev, Error **errp) |
| { |
| SabreState *s = SABRE_DEVICE(dev); |
| PCIHostState *phb = PCI_HOST_BRIDGE(dev); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(s); |
| PCIDevice *pci_dev; |
| |
| /* sabre_config */ |
| sysbus_mmio_map(sbd, 0, s->special_base); |
| /* PCI configuration space */ |
| sysbus_mmio_map(sbd, 1, s->special_base + 0x1000000ULL); |
| /* pci_ioport */ |
| sysbus_mmio_map(sbd, 2, s->special_base + 0x2000000ULL); |
| |
| memory_region_init(&s->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL); |
| memory_region_add_subregion(get_system_memory(), s->mem_base, |
| &s->pci_mmio); |
| |
| phb->bus = pci_register_root_bus(dev, "pci", |
| pci_sabre_set_irq, pci_sabre_map_irq, s, |
| &s->pci_mmio, |
| &s->pci_ioport, |
| 0, 32, TYPE_PCI_BUS); |
| |
| pci_create_simple(phb->bus, 0, TYPE_SABRE_PCI_DEVICE); |
| |
| /* IOMMU */ |
| memory_region_add_subregion_overlap(&s->sabre_config, 0x200, |
| sysbus_mmio_get_region(SYS_BUS_DEVICE(s->iommu), 0), 1); |
| pci_setup_iommu(phb->bus, sabre_pci_dma_iommu, s->iommu); |
| |
| /* APB secondary busses */ |
| pci_dev = pci_new_multifunction(PCI_DEVFN(1, 0), true, |
| TYPE_SIMBA_PCI_BRIDGE); |
| s->bridgeB = PCI_BRIDGE(pci_dev); |
| pci_bridge_map_irq(s->bridgeB, "pciB", pci_simbaB_map_irq); |
| pci_realize_and_unref(pci_dev, phb->bus, &error_fatal); |
| |
| pci_dev = pci_new_multifunction(PCI_DEVFN(1, 1), true, |
| TYPE_SIMBA_PCI_BRIDGE); |
| s->bridgeA = PCI_BRIDGE(pci_dev); |
| pci_bridge_map_irq(s->bridgeA, "pciA", pci_simbaA_map_irq); |
| pci_realize_and_unref(pci_dev, phb->bus, &error_fatal); |
| } |
| |
| static void sabre_init(Object *obj) |
| { |
| SabreState *s = SABRE_DEVICE(obj); |
| SysBusDevice *sbd = SYS_BUS_DEVICE(obj); |
| unsigned int i; |
| |
| for (i = 0; i < 8; i++) { |
| s->pci_irq_map[i] = (0x1f << 6) | (i << 2); |
| } |
| for (i = 0; i < 2; i++) { |
| s->pci_err_irq_map[i] = (0x1f << 6) | 0x30; |
| } |
| for (i = 0; i < 32; i++) { |
| s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i; |
| } |
| qdev_init_gpio_in_named(DEVICE(s), pci_sabre_set_irq, "pbm-irq", MAX_IVEC); |
| qdev_init_gpio_out_named(DEVICE(s), s->ivec_irqs, "ivec-irq", MAX_IVEC); |
| s->irq_request = NO_IRQ_REQUEST; |
| s->pci_irq_in = 0ULL; |
| |
| /* IOMMU */ |
| object_property_add_link(obj, "iommu", TYPE_SUN4U_IOMMU, |
| (Object **) &s->iommu, |
| qdev_prop_allow_set_link_before_realize, |
| 0); |
| |
| /* sabre_config */ |
| memory_region_init_io(&s->sabre_config, OBJECT(s), &sabre_config_ops, s, |
| "sabre-config", 0x10000); |
| /* at region 0 */ |
| sysbus_init_mmio(sbd, &s->sabre_config); |
| |
| memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s, |
| "sabre-pci-config", 0x1000000); |
| /* at region 1 */ |
| sysbus_init_mmio(sbd, &s->pci_config); |
| |
| /* pci_ioport */ |
| memory_region_init(&s->pci_ioport, OBJECT(s), "sabre-pci-ioport", |
| 0x1000000); |
| |
| /* at region 2 */ |
| sysbus_init_mmio(sbd, &s->pci_ioport); |
| } |
| |
| static void sabre_pci_realize(PCIDevice *d, Error **errp) |
| { |
| pci_set_word(d->config + PCI_COMMAND, |
| PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER); |
| pci_set_word(d->config + PCI_STATUS, |
| PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ | |
| PCI_STATUS_DEVSEL_MEDIUM); |
| } |
| |
| static void sabre_pci_class_init(ObjectClass *klass, void *data) |
| { |
| PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| |
| k->realize = sabre_pci_realize; |
| k->vendor_id = PCI_VENDOR_ID_SUN; |
| k->device_id = PCI_DEVICE_ID_SUN_SABRE; |
| k->class_id = PCI_CLASS_BRIDGE_HOST; |
| /* |
| * PCI-facing part of the host bridge, not usable without the |
| * host-facing part, which can't be device_add'ed, yet. |
| */ |
| dc->user_creatable = false; |
| } |
| |
| static const TypeInfo sabre_pci_info = { |
| .name = TYPE_SABRE_PCI_DEVICE, |
| .parent = TYPE_PCI_DEVICE, |
| .instance_size = sizeof(SabrePCIState), |
| .class_init = sabre_pci_class_init, |
| .interfaces = (InterfaceInfo[]) { |
| { INTERFACE_CONVENTIONAL_PCI_DEVICE }, |
| { }, |
| }, |
| }; |
| |
| static char *sabre_ofw_unit_address(const SysBusDevice *dev) |
| { |
| SabreState *s = SABRE_DEVICE(dev); |
| |
| return g_strdup_printf("%x,%x", |
| (uint32_t)((s->special_base >> 32) & 0xffffffff), |
| (uint32_t)(s->special_base & 0xffffffff)); |
| } |
| |
| static Property sabre_properties[] = { |
| DEFINE_PROP_UINT64("special-base", SabreState, special_base, 0), |
| DEFINE_PROP_UINT64("mem-base", SabreState, mem_base, 0), |
| DEFINE_PROP_END_OF_LIST(), |
| }; |
| |
| static void sabre_class_init(ObjectClass *klass, void *data) |
| { |
| DeviceClass *dc = DEVICE_CLASS(klass); |
| SysBusDeviceClass *sbc = SYS_BUS_DEVICE_CLASS(klass); |
| |
| dc->realize = sabre_realize; |
| dc->reset = sabre_reset; |
| device_class_set_props(dc, sabre_properties); |
| set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); |
| dc->fw_name = "pci"; |
| sbc->explicit_ofw_unit_address = sabre_ofw_unit_address; |
| } |
| |
| static const TypeInfo sabre_info = { |
| .name = TYPE_SABRE, |
| .parent = TYPE_PCI_HOST_BRIDGE, |
| .instance_size = sizeof(SabreState), |
| .instance_init = sabre_init, |
| .class_init = sabre_class_init, |
| }; |
| |
| static void sabre_register_types(void) |
| { |
| type_register_static(&sabre_info); |
| type_register_static(&sabre_pci_info); |
| } |
| |
| type_init(sabre_register_types) |
