/* * System (CPU) Bus device support code * * Copyright (c) 2009 CodeSourcery * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, see <http://www.gnu.org/licenses/>. */ #include "hw/sysbus.h" #include "monitor/monitor.h" #include "exec/address-spaces.h" static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent); static char *sysbus_get_fw_dev_path(DeviceState *dev); static void system_bus_class_init(ObjectClass *klass, void *data) { BusClass *k = BUS_CLASS(klass); k->print_dev = sysbus_dev_print; k->get_fw_dev_path = sysbus_get_fw_dev_path; } static const TypeInfo system_bus_info = { .name = TYPE_SYSTEM_BUS, .parent = TYPE_BUS, .instance_size = sizeof(BusState), .class_init = system_bus_class_init, }; void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq) { assert(n >= 0 && n < dev->num_irq); dev->irqs[n] = NULL; if (dev->irqp[n]) { *dev->irqp[n] = irq; } } static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr, bool may_overlap, int priority) { assert(n >= 0 && n < dev->num_mmio); if (dev->mmio[n].addr == addr) { /* ??? region already mapped here. */ return; } if (dev->mmio[n].addr != (hwaddr)-1) { /* Unregister previous mapping. */ memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory); } dev->mmio[n].addr = addr; if (may_overlap) { memory_region_add_subregion_overlap(get_system_memory(), addr, dev->mmio[n].memory, priority); } else { memory_region_add_subregion(get_system_memory(), addr, dev->mmio[n].memory); } } void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr) { sysbus_mmio_map_common(dev, n, addr, false, 0); } void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr, int priority) { sysbus_mmio_map_common(dev, n, addr, true, priority); } /* Request an IRQ source. The actual IRQ object may be populated later. */ void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p) { int n; assert(dev->num_irq < QDEV_MAX_IRQ); n = dev->num_irq++; dev->irqp[n] = p; } /* Pass IRQs from a target device. */ void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target) { int i; assert(dev->num_irq == 0); dev->num_irq = target->num_irq; for (i = 0; i < dev->num_irq; i++) { dev->irqp[i] = target->irqp[i]; } } void sysbus_init_mmio(SysBusDevice *dev, MemoryRegion *memory) { int n; assert(dev->num_mmio < QDEV_MAX_MMIO); n = dev->num_mmio++; dev->mmio[n].addr = -1; dev->mmio[n].memory = memory; } MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n) { return dev->mmio[n].memory; } void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size) { pio_addr_t i; for (i = 0; i < size; i++) { assert(dev->num_pio < QDEV_MAX_PIO); dev->pio[dev->num_pio++] = ioport++; } } static int sysbus_device_init(DeviceState *dev) { SysBusDevice *sd = SYS_BUS_DEVICE(dev); SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd); if (!sbc->init) { return 0; } return sbc->init(sd); } DeviceState *sysbus_create_varargs(const char *name, hwaddr addr, ...) { DeviceState *dev; SysBusDevice *s; va_list va; qemu_irq irq; int n; dev = qdev_create(NULL, name); s = SYS_BUS_DEVICE(dev); qdev_init_nofail(dev); if (addr != (hwaddr)-1) { sysbus_mmio_map(s, 0, addr); } va_start(va, addr); n = 0; while (1) { irq = va_arg(va, qemu_irq); if (!irq) { break; } sysbus_connect_irq(s, n, irq); n++; } va_end(va); return dev; } DeviceState *sysbus_try_create_varargs(const char *name, hwaddr addr, ...) { DeviceState *dev; SysBusDevice *s; va_list va; qemu_irq irq; int n; dev = qdev_try_create(NULL, name); if (!dev) { return NULL; } s = SYS_BUS_DEVICE(dev); qdev_init_nofail(dev); if (addr != (hwaddr)-1) { sysbus_mmio_map(s, 0, addr); } va_start(va, addr); n = 0; while (1) { irq = va_arg(va, qemu_irq); if (!irq) { break; } sysbus_connect_irq(s, n, irq); n++; } va_end(va); return dev; } static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent) { SysBusDevice *s = SYS_BUS_DEVICE(dev); hwaddr size; int i; monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq); for (i = 0; i < s->num_mmio; i++) { size = memory_region_size(s->mmio[i].memory); monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n", indent, "", s->mmio[i].addr, size); } } static char *sysbus_get_fw_dev_path(DeviceState *dev) { SysBusDevice *s = SYS_BUS_DEVICE(dev); char path[40]; int off; off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev)); if (s->num_mmio) { snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx, s->mmio[0].addr); } else if (s->num_pio) { snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]); } return g_strdup(path); } void sysbus_add_io(SysBusDevice *dev, hwaddr addr, MemoryRegion *mem) { memory_region_add_subregion(get_system_io(), addr, mem); } void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem) { memory_region_del_subregion(get_system_io(), mem); } MemoryRegion *sysbus_address_space(SysBusDevice *dev) { return get_system_memory(); } static void sysbus_device_class_init(ObjectClass *klass, void *data) { DeviceClass *k = DEVICE_CLASS(klass); k->init = sysbus_device_init; k->bus_type = TYPE_SYSTEM_BUS; /* * device_add plugs devices into suitable bus. For "real" buses, * that actually connects the device. For sysbus, the connections * need to be made separately, and device_add can't do that. The * device would be left unconnected, and could not possibly work. */ k->cannot_instantiate_with_device_add_yet = true; } static const TypeInfo sysbus_device_type_info = { .name = TYPE_SYS_BUS_DEVICE, .parent = TYPE_DEVICE, .instance_size = sizeof(SysBusDevice), .abstract = true, .class_size = sizeof(SysBusDeviceClass), .class_init = sysbus_device_class_init, }; /* This is a nasty hack to allow passing a NULL bus to qdev_create. */ static BusState *main_system_bus; static void main_system_bus_create(void) { /* assign main_system_bus before qbus_create_inplace() * in order to make "if (bus != sysbus_get_default())" work */ main_system_bus = g_malloc0(system_bus_info.instance_size); qbus_create_inplace(main_system_bus, system_bus_info.instance_size, TYPE_SYSTEM_BUS, NULL, "main-system-bus"); OBJECT(main_system_bus)->free = g_free; object_property_add_child(container_get(qdev_get_machine(), "/unattached"), "sysbus", OBJECT(main_system_bus), NULL); } BusState *sysbus_get_default(void) { if (!main_system_bus) { main_system_bus_create(); } return main_system_bus; } static void sysbus_register_types(void) { type_register_static(&system_bus_info); type_register_static(&sysbus_device_type_info); } type_init(sysbus_register_types)