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/*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA
*/
#include "sysbus.h"
#include "sysemu.h"
typedef struct {
DeviceInfo qdev;
sysbus_initfn init;
} SysBusDeviceInfo;
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
{
assert(n >= 0 && n < dev->num_irq);
dev->irqs[n] = 0;
if (dev->irqp[n]) {
*dev->irqp[n] = irq;
}
}
void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr)
{
assert(n >= 0 && n < dev->num_mmio);
if (dev->mmio[n].addr == addr) {
/* ??? region already mapped here. */
return;
}
if (dev->mmio[n].addr != (target_phys_addr_t)-1) {
/* Unregister previous mapping. */
cpu_register_physical_memory(dev->mmio[n].addr, dev->mmio[n].size,
IO_MEM_UNASSIGNED);
}
dev->mmio[n].addr = addr;
if (dev->mmio[n].cb) {
dev->mmio[n].cb(dev, addr);
} else {
cpu_register_physical_memory(addr, dev->mmio[n].size,
dev->mmio[n].iofunc);
}
}
/* 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, target_phys_addr_t size, int iofunc)
{
int n;
assert(dev->num_mmio < QDEV_MAX_MMIO);
n = dev->num_mmio++;
dev->mmio[n].addr = -1;
dev->mmio[n].size = size;
dev->mmio[n].iofunc = iofunc;
}
void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
mmio_mapfunc cb)
{
int n;
assert(dev->num_mmio < QDEV_MAX_MMIO);
n = dev->num_mmio++;
dev->mmio[n].addr = -1;
dev->mmio[n].size = size;
dev->mmio[n].cb = cb;
}
static void sysbus_device_init(DeviceState *dev, DeviceInfo *base)
{
SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
info->init(sysbus_from_qdev(dev));
}
void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
{
SysBusDeviceInfo *info;
info = qemu_mallocz(sizeof(*info));
info->init = init;
info->qdev.init = sysbus_device_init;
info->qdev.bus_type = BUS_TYPE_SYSTEM;
assert(size >= sizeof(SysBusDevice));
qdev_register(name, size, &info->qdev);
}
DeviceState *sysbus_create_varargs(const char *name,
target_phys_addr_t addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_create(NULL, name);
s = sysbus_from_qdev(dev);
qdev_init(dev);
if (addr != (target_phys_addr_t)-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++;
}
return dev;
}
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