/*
* 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 "hw/sysbus.h"
#include "monitor/monitor.h"
#include "exec/address-spaces.h"
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *sysbus_get_fw_dev_path(DeviceState *dev);
static void system_bus_class_init(ObjectClass *klass, void *data)
{
BusClass *k = BUS_CLASS(klass);
k->print_dev = sysbus_dev_print;
k->get_fw_dev_path = sysbus_get_fw_dev_path;
}
static const TypeInfo system_bus_info = {
.name = TYPE_SYSTEM_BUS,
.parent = TYPE_BUS,
.instance_size = sizeof(BusState),
.class_init = system_bus_class_init,
};
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;
}
}
static void sysbus_mmio_map_common(SysBusDevice *dev, int n, hwaddr addr,
bool may_overlap, int priority)
{
assert(n >= 0 && n < dev->num_mmio);
if (dev->mmio[n].addr == addr) {
/* ??? region already mapped here. */
return;
}
if (dev->mmio[n].addr != (hwaddr)-1) {
/* Unregister previous mapping. */
memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
}
dev->mmio[n].addr = addr;
if (may_overlap) {
memory_region_add_subregion_overlap(get_system_memory(),
addr,
dev->mmio[n].memory,
priority);
}
else {
memory_region_add_subregion(get_system_memory(),
addr,
dev->mmio[n].memory);
}
}
void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr)
{
sysbus_mmio_map_common(dev, n, addr, false, 0);
}
void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
int priority)
{
sysbus_mmio_map_common(dev, n, addr, true, priority);
}
/* 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, MemoryRegion *memory)
{
int n;
assert(dev->num_mmio < QDEV_MAX_MMIO);
n = dev->num_mmio++;
dev->mmio[n].addr = -1;
dev->mmio[n].memory = memory;
}
MemoryRegion *sysbus_mmio_get_region(SysBusDevice *dev, int n)
{
return dev->mmio[n].memory;
}
void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t size)
{
pio_addr_t i;
for (i = 0; i < size; i++) {
assert(dev->num_pio < QDEV_MAX_PIO);
dev->pio[dev->num_pio++] = ioport++;
}
}
static int sysbus_device_init(DeviceState *dev)
{
SysBusDevice *sd = SYS_BUS_DEVICE(dev);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(sd);
if (!sbc->init) {
return 0;
}
return sbc->init(sd);
}
DeviceState *sysbus_create_varargs(const char *name,
hwaddr addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_create(NULL, name);
s = SYS_BUS_DEVICE(dev);
qdev_init_nofail(dev);
if (addr != (hwaddr)-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++;
}
va_end(va);
return dev;
}
DeviceState *sysbus_try_create_varargs(const char *name,
hwaddr addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_try_create(NULL, name);
if (!dev) {
return NULL;
}
s = SYS_BUS_DEVICE(dev);
qdev_init_nofail(dev);
if (addr != (hwaddr)-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++;
}
va_end(va);
return dev;
}
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
SysBusDevice *s = SYS_BUS_DEVICE(dev);
hwaddr size;
int i;
monitor_printf(mon, "%*sirq %d\n", indent, "", s->num_irq);
for (i = 0; i < s->num_mmio; i++) {
size = memory_region_size(s->mmio[i].memory);
monitor_printf(mon, "%*smmio " TARGET_FMT_plx "/" TARGET_FMT_plx "\n",
indent, "", s->mmio[i].addr, size);
}
}
static char *sysbus_get_fw_dev_path(DeviceState *dev)
{
SysBusDevice *s = SYS_BUS_DEVICE(dev);
char path[40];
int off;
off = snprintf(path, sizeof(path), "%s", qdev_fw_name(dev));
if (s->num_mmio) {
snprintf(path + off, sizeof(path) - off, "@"TARGET_FMT_plx,
s->mmio[0].addr);
} else if (s->num_pio) {
snprintf(path + off, sizeof(path) - off, "@i%04x", s->pio[0]);
}
return g_strdup(path);
}
void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
MemoryRegion *mem)
{
memory_region_add_subregion(get_system_io(), addr, mem);
}
void sysbus_del_io(SysBusDevice *dev, MemoryRegion *mem)
{
memory_region_del_subregion(get_system_io(), mem);
}
MemoryRegion *sysbus_address_space(SysBusDevice *dev)
{
return get_system_memory();
}
static void sysbus_device_class_init(ObjectClass *klass, void *data)
{
DeviceClass *k = DEVICE_CLASS(klass);
k->init = sysbus_device_init;
k->bus_type = TYPE_SYSTEM_BUS;
/*
* device_add plugs devices into suitable bus. For "real" buses,
* that actually connects the device. For sysbus, the connections
* need to be made separately, and device_add can't do that. The
* device would be left unconnected, and could not possibly work.
*/
k->cannot_instantiate_with_device_add_yet = true;
}
static const TypeInfo sysbus_device_type_info = {
.name = TYPE_SYS_BUS_DEVICE,
.parent = TYPE_DEVICE,
.instance_size = sizeof(SysBusDevice),
.abstract = true,
.class_size = sizeof(SysBusDeviceClass),
.class_init = sysbus_device_class_init,
};
/* This is a nasty hack to allow passing a NULL bus to qdev_create. */
static BusState *main_system_bus;
static void main_system_bus_create(void)
{
/* assign main_system_bus before qbus_create_inplace()
* in order to make "if (bus != sysbus_get_default())" work */
main_system_bus = g_malloc0(system_bus_info.instance_size);
qbus_create_inplace(main_system_bus, system_bus_info.instance_size,
TYPE_SYSTEM_BUS, NULL, "main-system-bus");
OBJECT(main_system_bus)->free = g_free;
object_property_add_child(container_get(qdev_get_machine(),
"/unattached"),
"sysbus", OBJECT(main_system_bus), NULL);
}
BusState *sysbus_get_default(void)
{
if (!main_system_bus) {
main_system_bus_create();
}
return main_system_bus;
}
static void sysbus_register_types(void)
{
type_register_static(&system_bus_info);
type_register_static(&sysbus_device_type_info);
}
type_init(sysbus_register_types)
