140 lines
3.6 KiB
C
140 lines
3.6 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
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*/
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#include "sysbus.h"
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#include "sysemu.h"
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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] = 0;
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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, target_phys_addr_t 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 != (target_phys_addr_t)-1) {
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/* Unregister previous mapping. */
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cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
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IO_MEM_UNASSIGNED);
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}
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dev->mmio[n].addr = addr;
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if (dev->mmio[n].cb) {
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dev->mmio[n].cb(dev, addr);
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} else {
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cpu_register_physical_memory(addr, dev->mmio[n].size,
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dev->mmio[n].iofunc);
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}
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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, target_phys_addr_t size, int iofunc)
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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].size = size;
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dev->mmio[n].iofunc = iofunc;
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}
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void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
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mmio_mapfunc cb)
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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].size = size;
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dev->mmio[n].cb = cb;
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}
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static void sysbus_device_init(DeviceState *dev, void *opaque)
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{
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sysbus_initfn init = (sysbus_initfn)opaque;
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init(sysbus_from_qdev(dev));
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}
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void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
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{
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assert(size >= sizeof(SysBusDevice));
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qdev_register(name, size, sysbus_device_init, init);
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}
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DeviceState *sysbus_create_varargs(const char *name,
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target_phys_addr_t 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(dev);
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if (addr != (target_phys_addr_t)-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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return dev;
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}
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