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