diff options
Diffstat (limited to 'qemu/hw/core/platform-bus.c')
| -rw-r--r-- | qemu/hw/core/platform-bus.c | 252 |
1 files changed, 0 insertions, 252 deletions
diff --git a/qemu/hw/core/platform-bus.c b/qemu/hw/core/platform-bus.c deleted file mode 100644 index 36f84ab72..000000000 --- a/qemu/hw/core/platform-bus.c +++ /dev/null @@ -1,252 +0,0 @@ -/* - * Platform Bus device to support dynamic Sysbus devices - * - * Copyright (C) 2014 Freescale Semiconductor, Inc. All rights reserved. - * - * Author: Alexander Graf, <agraf@suse.de> - * - * 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 "qemu/osdep.h" -#include "hw/platform-bus.h" -#include "exec/address-spaces.h" -#include "qemu/error-report.h" -#include "sysemu/sysemu.h" - - -/* - * Returns the PlatformBus IRQ number for a SysBusDevice irq number or -1 if - * the IRQ is not mapped on this Platform bus. - */ -int platform_bus_get_irqn(PlatformBusDevice *pbus, SysBusDevice *sbdev, - int n) -{ - qemu_irq sbirq = sysbus_get_connected_irq(sbdev, n); - int i; - - for (i = 0; i < pbus->num_irqs; i++) { - if (pbus->irqs[i] == sbirq) { - return i; - } - } - - /* IRQ not mapped on platform bus */ - return -1; -} - -/* - * Returns the PlatformBus MMIO region offset for Region n of a SysBusDevice or - * -1 if the region is not mapped on this Platform bus. - */ -hwaddr platform_bus_get_mmio_addr(PlatformBusDevice *pbus, SysBusDevice *sbdev, - int n) -{ - MemoryRegion *pbus_mr = &pbus->mmio; - MemoryRegion *sbdev_mr = sysbus_mmio_get_region(sbdev, n); - Object *pbus_mr_obj = OBJECT(pbus_mr); - Object *parent_mr; - - if (!memory_region_is_mapped(sbdev_mr)) { - /* Region is not mapped? */ - return -1; - } - - parent_mr = object_property_get_link(OBJECT(sbdev_mr), "container", NULL); - - assert(parent_mr); - if (parent_mr != pbus_mr_obj) { - /* MMIO region is not mapped on platform bus */ - return -1; - } - - return object_property_get_int(OBJECT(sbdev_mr), "addr", NULL); -} - -static int platform_bus_count_irqs(SysBusDevice *sbdev, void *opaque) -{ - PlatformBusDevice *pbus = opaque; - qemu_irq sbirq; - int n, i; - - for (n = 0; ; n++) { - if (!sysbus_has_irq(sbdev, n)) { - break; - } - - sbirq = sysbus_get_connected_irq(sbdev, n); - for (i = 0; i < pbus->num_irqs; i++) { - if (pbus->irqs[i] == sbirq) { - bitmap_set(pbus->used_irqs, i, 1); - break; - } - } - } - - return 0; -} - -/* - * Loop through all sysbus devices and look for unassigned IRQ lines as well as - * unassociated MMIO regions. Connect them to the platform bus if available. - */ -static void plaform_bus_refresh_irqs(PlatformBusDevice *pbus) -{ - bitmap_zero(pbus->used_irqs, pbus->num_irqs); - foreach_dynamic_sysbus_device(platform_bus_count_irqs, pbus); - pbus->done_gathering = true; -} - -static void platform_bus_map_irq(PlatformBusDevice *pbus, SysBusDevice *sbdev, - int n) -{ - int max_irqs = pbus->num_irqs; - int irqn; - - if (sysbus_is_irq_connected(sbdev, n)) { - /* IRQ is already mapped, nothing to do */ - return; - } - - irqn = find_first_zero_bit(pbus->used_irqs, max_irqs); - if (irqn >= max_irqs) { - error_report("Platform Bus: Can not fit IRQ line"); - exit(1); - } - - set_bit(irqn, pbus->used_irqs); - sysbus_connect_irq(sbdev, n, pbus->irqs[irqn]); -} - -static void platform_bus_map_mmio(PlatformBusDevice *pbus, SysBusDevice *sbdev, - int n) -{ - MemoryRegion *sbdev_mr = sysbus_mmio_get_region(sbdev, n); - uint64_t size = memory_region_size(sbdev_mr); - uint64_t alignment = (1ULL << (63 - clz64(size + size - 1))); - uint64_t off; - bool found_region = false; - - if (memory_region_is_mapped(sbdev_mr)) { - /* Region is already mapped, nothing to do */ - return; - } - - /* - * Look for empty space in the MMIO space that is naturally aligned with - * the target device's memory region - */ - for (off = 0; off < pbus->mmio_size; off += alignment) { - if (!memory_region_find(&pbus->mmio, off, size).mr) { - found_region = true; - break; - } - } - - if (!found_region) { - error_report("Platform Bus: Can not fit MMIO region of size %"PRIx64, - size); - exit(1); - } - - /* Map the device's region into our Platform Bus MMIO space */ - memory_region_add_subregion(&pbus->mmio, off, sbdev_mr); -} - -/* - * For each sysbus device, look for unassigned IRQ lines as well as - * unassociated MMIO regions. Connect them to the platform bus if available. - */ -static int link_sysbus_device(SysBusDevice *sbdev, void *opaque) -{ - PlatformBusDevice *pbus = opaque; - int i; - - for (i = 0; sysbus_has_irq(sbdev, i); i++) { - platform_bus_map_irq(pbus, sbdev, i); - } - - for (i = 0; sysbus_has_mmio(sbdev, i); i++) { - platform_bus_map_mmio(pbus, sbdev, i); - } - - return 0; -} - -static void platform_bus_init_notify(Notifier *notifier, void *data) -{ - PlatformBusDevice *pb = container_of(notifier, PlatformBusDevice, notifier); - - /* - * Generate a bitmap of used IRQ lines, as the user might have specified - * them on the command line. - */ - plaform_bus_refresh_irqs(pb); - - foreach_dynamic_sysbus_device(link_sysbus_device, pb); -} - -static void platform_bus_realize(DeviceState *dev, Error **errp) -{ - PlatformBusDevice *pbus; - SysBusDevice *d; - int i; - - d = SYS_BUS_DEVICE(dev); - pbus = PLATFORM_BUS_DEVICE(dev); - - memory_region_init(&pbus->mmio, NULL, "platform bus", pbus->mmio_size); - sysbus_init_mmio(d, &pbus->mmio); - - pbus->used_irqs = bitmap_new(pbus->num_irqs); - pbus->irqs = g_new0(qemu_irq, pbus->num_irqs); - for (i = 0; i < pbus->num_irqs; i++) { - sysbus_init_irq(d, &pbus->irqs[i]); - } - - /* - * Register notifier that allows us to gather dangling devices once the - * machine is completely assembled - */ - pbus->notifier.notify = platform_bus_init_notify; - qemu_add_machine_init_done_notifier(&pbus->notifier); -} - -static Property platform_bus_properties[] = { - DEFINE_PROP_UINT32("num_irqs", PlatformBusDevice, num_irqs, 0), - DEFINE_PROP_UINT32("mmio_size", PlatformBusDevice, mmio_size, 0), - DEFINE_PROP_END_OF_LIST() -}; - -static void platform_bus_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - - dc->realize = platform_bus_realize; - dc->props = platform_bus_properties; -} - -static const TypeInfo platform_bus_info = { - .name = TYPE_PLATFORM_BUS_DEVICE, - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(PlatformBusDevice), - .class_init = platform_bus_class_init, -}; - -static void platform_bus_register_types(void) -{ - type_register_static(&platform_bus_info); -} - -type_init(platform_bus_register_types) |