qemu/hw/sysbus.c
Markus Armbruster e23a1b33b5 New qdev_init_nofail()
Like qdev_init(), but terminate program via hw_error() instead of
returning an error value.

Use it instead of qdev_init() where terminating the program on failure
is okay, either because it's during machine construction, or because
we know that failure can't happen.

Because relying in the latter is somewhat unclean, and the former is
not always obvious, it would be nice to go back to qdev_init() in the
not-so-obvious cases, only with proper error handling.  I'm leaving
that for another day, because it involves making sure that error
values are properly checked by all callers.

Patchworks-ID: 35168
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-10-07 08:54:54 -05:00

173 lines
4.5 KiB
C

/*
* 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 "sysbus.h"
#include "sysemu.h"
#include "monitor.h"
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
struct BusInfo system_bus_info = {
.name = "System",
.size = sizeof(BusState),
.print_dev = sysbus_dev_print,
};
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;
}
}
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 int sysbus_device_init(DeviceState *dev, DeviceInfo *base)
{
SysBusDeviceInfo *info = container_of(base, SysBusDeviceInfo, qdev);
return info->init(sysbus_from_qdev(dev));
}
void sysbus_register_withprop(SysBusDeviceInfo *info)
{
info->qdev.init = sysbus_device_init;
info->qdev.bus_info = &system_bus_info;
assert(info->qdev.size >= sizeof(SysBusDevice));
qdev_register(&info->qdev);
}
void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
{
SysBusDeviceInfo *info;
info = qemu_mallocz(sizeof(*info));
info->qdev.name = qemu_strdup(name);
info->qdev.size = size;
info->init = init;
sysbus_register_withprop(info);
}
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_nofail(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;
}
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
SysBusDevice *s = sysbus_from_qdev(dev);
int i;
for (i = 0; i < s->num_mmio; i++) {
monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
indent, "", s->mmio[i].addr, s->mmio[i].size);
}
}