/* * QEMU Ultrasparc APB PCI host * * Copyright (c) 2006 Fabrice Bellard * Copyright (c) 2012,2013 Artyom Tarasenko * * 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. */ /* XXX This file and most of its contents are somewhat misnamed. The Ultrasparc PCI host is called the PCI Bus Module (PBM). The APB is the secondary PCI bridge. */ #include "hw/sysbus.h" #include "hw/pci/pci.h" #include "hw/pci/pci_host.h" #include "hw/pci/pci_bridge.h" #include "hw/pci/pci_bus.h" #include "hw/pci-host/apb.h" #include "sysemu/sysemu.h" #include "exec/address-spaces.h" /* debug APB */ //#define DEBUG_APB #ifdef DEBUG_APB #define APB_DPRINTF(fmt, ...) \ do { printf("APB: " fmt , ## __VA_ARGS__); } while (0) #else #define APB_DPRINTF(fmt, ...) #endif /* * Chipset docs: * PBM: "UltraSPARC IIi User's Manual", * http://www.sun.com/processors/manuals/805-0087.pdf * * APB: "Advanced PCI Bridge (APB) User's Manual", * http://www.sun.com/processors/manuals/805-1251.pdf */ #define PBM_PCI_IMR_MASK 0x7fffffff #define PBM_PCI_IMR_ENABLED 0x80000000 #define POR (1 << 31) #define SOFT_POR (1 << 30) #define SOFT_XIR (1 << 29) #define BTN_POR (1 << 28) #define BTN_XIR (1 << 27) #define RESET_MASK 0xf8000000 #define RESET_WCMASK 0x98000000 #define RESET_WMASK 0x60000000 #define MAX_IVEC 0x40 #define NO_IRQ_REQUEST (MAX_IVEC + 1) #define TYPE_APB "pbm" #define APB_DEVICE(obj) \ OBJECT_CHECK(APBState, (obj), TYPE_APB) typedef struct APBState { PCIHostState parent_obj; MemoryRegion apb_config; MemoryRegion pci_config; MemoryRegion pci_mmio; MemoryRegion pci_ioport; uint64_t pci_irq_in; uint32_t iommu[4]; uint32_t pci_control[16]; uint32_t pci_irq_map[8]; uint32_t obio_irq_map[32]; qemu_irq *pbm_irqs; qemu_irq *ivec_irqs; unsigned int irq_request; uint32_t reset_control; unsigned int nr_resets; } APBState; static inline void pbm_set_request(APBState *s, unsigned int irq_num) { APB_DPRINTF("%s: request irq %d\n", __func__, irq_num); s->irq_request = irq_num; qemu_set_irq(s->ivec_irqs[irq_num], 1); } static inline void pbm_check_irqs(APBState *s) { unsigned int i; /* Previous request is not acknowledged, resubmit */ if (s->irq_request != NO_IRQ_REQUEST) { pbm_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) { pbm_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) { pbm_set_request(s, i); break; } } } } static inline void pbm_clear_request(APBState *s, unsigned int irq_num) { APB_DPRINTF("%s: clear request irq %d\n", __func__, irq_num); qemu_set_irq(s->ivec_irqs[irq_num], 0); s->irq_request = NO_IRQ_REQUEST; } static void apb_config_writel (void *opaque, hwaddr addr, uint64_t val, unsigned size) { APBState *s = opaque; APB_DPRINTF("%s: addr " TARGET_FMT_plx " val %" PRIx64 "\n", __func__, addr, val); switch (addr & 0xffff) { case 0x30 ... 0x4f: /* DMA error registers */ /* XXX: not implemented yet */ break; case 0x200 ... 0x20b: /* IOMMU */ s->iommu[(addr & 0xf) >> 2] = val; break; case 0x20c ... 0x3ff: /* IOMMU flush */ 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)) { pbm_clear_request(s, ino); } pbm_check_irqs(s); } break; case 0x1000 ... 0x1080: /* 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)) { pbm_clear_request(s, ino | 0x20); } pbm_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) { pbm_clear_request(s, s->irq_request); pbm_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) { pbm_clear_request(s, ino); pbm_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(); } else if (val & SOFT_XIR) { qemu_system_reset_request(); } } 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 apb_config_readl (void *opaque, hwaddr addr, unsigned size) { APBState *s = opaque; uint32_t val; switch (addr & 0xffff) { case 0x30 ... 0x4f: /* DMA error registers */ val = 0; /* XXX: not implemented yet */ break; case 0x200 ... 0x20b: /* IOMMU */ val = s->iommu[(addr & 0xf) >> 2]; break; case 0x20c ... 0x3ff: /* IOMMU flush */ val = 0; break; case 0xc00 ... 0xc3f: /* PCI interrupt control */ if (addr & 4) { val = s->pci_irq_map[(addr & 0x3f) >> 3]; } else { val = 0; } break; case 0x1000 ... 0x1080: /* OBIO interrupt control */ if (addr & 4) { val = s->obio_irq_map[(addr & 0xff) >> 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; } APB_DPRINTF("%s: addr " TARGET_FMT_plx " -> %x\n", __func__, addr, val); return val; } static const MemoryRegionOps apb_config_ops = { .read = apb_config_readl, .write = apb_config_writel, .endianness = DEVICE_NATIVE_ENDIAN, }; static void apb_pci_config_write(void *opaque, hwaddr addr, uint64_t val, unsigned size) { APBState *s = opaque; PCIHostState *phb = PCI_HOST_BRIDGE(s); val = qemu_bswap_len(val, size); APB_DPRINTF("%s: addr " TARGET_FMT_plx " val %" PRIx64 "\n", __func__, addr, val); pci_data_write(phb->bus, addr, val, size); } static uint64_t apb_pci_config_read(void *opaque, hwaddr addr, unsigned size) { uint32_t ret; APBState *s = opaque; PCIHostState *phb = PCI_HOST_BRIDGE(s); ret = pci_data_read(phb->bus, addr, size); ret = qemu_bswap_len(ret, size); APB_DPRINTF("%s: addr " TARGET_FMT_plx " -> %x\n", __func__, addr, ret); return ret; } /* The APB host has an IRQ line for each IRQ line of each slot. */ static int pci_apb_map_irq(PCIDevice *pci_dev, int irq_num) { return ((pci_dev->devfn & 0x18) >> 1) + irq_num; } static int pci_pbm_map_irq(PCIDevice *pci_dev, int irq_num) { int bus_offset; if (pci_dev->devfn & 1) bus_offset = 16; else bus_offset = 0; return (bus_offset + (PCI_SLOT(pci_dev->devfn) << 2) + irq_num) & 0x1f; } static void pci_apb_set_irq(void *opaque, int irq_num, int level) { APBState *s = opaque; APB_DPRINTF("%s: set irq_in %d level %d\n", __func__, 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) { pbm_set_request(s, irq_num); } } else { s->pci_irq_in &= ~(1ULL << irq_num); } } else { /* OBIO IRQ map onto the next 32 INO. */ if (level) { APB_DPRINTF("%s: set irq %d level %d\n", __func__, 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)) { pbm_set_request(s, irq_num); } } else { s->pci_irq_in &= ~(1ULL << irq_num); } } } static int apb_pci_bridge_initfn(PCIDevice *dev) { int rc; rc = pci_bridge_initfn(dev, TYPE_PCI_BUS); if (rc < 0) { return rc; } /* * command register: * According to PCI bridge spec, after reset * bus master bit is off * memory space enable bit is off * According to manual (805-1251.pdf). * the reset value should be zero unless the boot pin is tied high * (which is true) and thus it should be PCI_COMMAND_MEMORY. */ pci_set_word(dev->config + PCI_COMMAND, PCI_COMMAND_MEMORY); pci_set_word(dev->config + PCI_STATUS, PCI_STATUS_FAST_BACK | PCI_STATUS_66MHZ | PCI_STATUS_DEVSEL_MEDIUM); return 0; } PCIBus *pci_apb_init(hwaddr special_base, hwaddr mem_base, qemu_irq *ivec_irqs, PCIBus **bus2, PCIBus **bus3, qemu_irq **pbm_irqs) { DeviceState *dev; SysBusDevice *s; PCIHostState *phb; APBState *d; PCIDevice *pci_dev; PCIBridge *br; /* Ultrasparc PBM main bus */ dev = qdev_create(NULL, TYPE_APB); qdev_init_nofail(dev); s = SYS_BUS_DEVICE(dev); /* apb_config */ sysbus_mmio_map(s, 0, special_base); /* PCI configuration space */ sysbus_mmio_map(s, 1, special_base + 0x1000000ULL); /* pci_ioport */ sysbus_mmio_map(s, 2, special_base + 0x2000000ULL); d = APB_DEVICE(dev); memory_region_init(&d->pci_mmio, OBJECT(s), "pci-mmio", 0x100000000ULL); memory_region_add_subregion(get_system_memory(), mem_base, &d->pci_mmio); phb = PCI_HOST_BRIDGE(dev); phb->bus = pci_register_bus(DEVICE(phb), "pci", pci_apb_set_irq, pci_pbm_map_irq, d, &d->pci_mmio, get_system_io(), 0, 32, TYPE_PCI_BUS); *pbm_irqs = d->pbm_irqs; d->ivec_irqs = ivec_irqs; pci_create_simple(phb->bus, 0, "pbm-pci"); /* APB secondary busses */ pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 0), true, "pbm-bridge"); br = PCI_BRIDGE(pci_dev); pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 1", pci_apb_map_irq); qdev_init_nofail(&pci_dev->qdev); *bus2 = pci_bridge_get_sec_bus(br); pci_dev = pci_create_multifunction(phb->bus, PCI_DEVFN(1, 1), true, "pbm-bridge"); br = PCI_BRIDGE(pci_dev); pci_bridge_map_irq(br, "Advanced PCI Bus secondary bridge 2", pci_apb_map_irq); qdev_init_nofail(&pci_dev->qdev); *bus3 = pci_bridge_get_sec_bus(br); return phb->bus; } static void pci_pbm_reset(DeviceState *d) { unsigned int i; APBState *s = APB_DEVICE(d); 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; } } static const MemoryRegionOps pci_config_ops = { .read = apb_pci_config_read, .write = apb_pci_config_write, .endianness = DEVICE_NATIVE_ENDIAN, }; static int pci_pbm_init_device(SysBusDevice *dev) { APBState *s; unsigned int i; s = APB_DEVICE(dev); for (i = 0; i < 8; i++) { s->pci_irq_map[i] = (0x1f << 6) | (i << 2); } for (i = 0; i < 32; i++) { s->obio_irq_map[i] = ((0x1f << 6) | 0x20) + i; } s->pbm_irqs = qemu_allocate_irqs(pci_apb_set_irq, s, MAX_IVEC); s->irq_request = NO_IRQ_REQUEST; s->pci_irq_in = 0ULL; /* apb_config */ memory_region_init_io(&s->apb_config, OBJECT(s), &apb_config_ops, s, "apb-config", 0x10000); /* at region 0 */ sysbus_init_mmio(dev, &s->apb_config); memory_region_init_io(&s->pci_config, OBJECT(s), &pci_config_ops, s, "apb-pci-config", 0x1000000); /* at region 1 */ sysbus_init_mmio(dev, &s->pci_config); /* pci_ioport */ memory_region_init_alias(&s->pci_ioport, OBJECT(s), "apb-pci-ioport", get_system_io(), 0, 0x10000); /* at region 2 */ sysbus_init_mmio(dev, &s->pci_ioport); return 0; } static int pbm_pci_host_init(PCIDevice *d) { 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); return 0; } static void pbm_pci_host_class_init(ObjectClass *klass, void *data) { PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); DeviceClass *dc = DEVICE_CLASS(klass); k->init = pbm_pci_host_init; 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->cannot_instantiate_with_device_add_yet = true; } static const TypeInfo pbm_pci_host_info = { .name = "pbm-pci", .parent = TYPE_PCI_DEVICE, .instance_size = sizeof(PCIDevice), .class_init = pbm_pci_host_class_init, }; static void pbm_host_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); k->init = pci_pbm_init_device; set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); dc->reset = pci_pbm_reset; } static const TypeInfo pbm_host_info = { .name = TYPE_APB, .parent = TYPE_PCI_HOST_BRIDGE, .instance_size = sizeof(APBState), .class_init = pbm_host_class_init, }; static void pbm_pci_bridge_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); PCIDeviceClass *k = PCI_DEVICE_CLASS(klass); k->init = apb_pci_bridge_initfn; k->exit = pci_bridge_exitfn; k->vendor_id = PCI_VENDOR_ID_SUN; k->device_id = PCI_DEVICE_ID_SUN_SIMBA; k->revision = 0x11; k->config_write = pci_bridge_write_config; k->is_bridge = 1; set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories); dc->reset = pci_bridge_reset; dc->vmsd = &vmstate_pci_device; } static const TypeInfo pbm_pci_bridge_info = { .name = "pbm-bridge", .parent = TYPE_PCI_BRIDGE, .class_init = pbm_pci_bridge_class_init, }; static void pbm_register_types(void) { type_register_static(&pbm_host_info); type_register_static(&pbm_pci_host_info); type_register_static(&pbm_pci_bridge_info); } type_init(pbm_register_types)