/*
* 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 2.1 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 "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
#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);
typedef struct SysBusFind {
void *opaque;
FindSysbusDeviceFunc *func;
} SysBusFind;
/* Run func() for every sysbus device, traverse the tree for everything else */
static int find_sysbus_device(Object *obj, void *opaque)
{
SysBusFind *find = opaque;
Object *dev;
SysBusDevice *sbdev;
dev = object_dynamic_cast(obj, TYPE_SYS_BUS_DEVICE);
sbdev = (SysBusDevice *)dev;
if (!sbdev) {
/* Container, traverse it for children */
return object_child_foreach(obj, find_sysbus_device, opaque);
}
find->func(sbdev, find->opaque);
return 0;
}
/*
* Loop through all dynamically created sysbus devices and call
* func() for each instance.
*/
void foreach_dynamic_sysbus_device(FindSysbusDeviceFunc *func, void *opaque)
{
Object *container;
SysBusFind find = {
.func = func,
.opaque = opaque,
};
/* Loop through all sysbus devices that were spawned outside the machine */
container = container_get(qdev_get_machine(), "/peripheral");
find_sysbus_device(container, &find);
container = container_get(qdev_get_machine(), "/peripheral-anon");
find_sysbus_device(container, &find);
}
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,
};
/* Check whether an IRQ source exists */
bool sysbus_has_irq(SysBusDevice *dev, int n)
{
char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n);
ObjectProperty *r;
r = object_property_find(OBJECT(dev), prop);
g_free(prop);
return (r != NULL);
}
bool sysbus_is_irq_connected(SysBusDevice *dev, int n)
{
return !!sysbus_get_connected_irq(dev, n);
}
qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n)
{
DeviceState *d = DEVICE(dev);
return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n);
}
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq)
{
SysBusDeviceClass *sbd = SYS_BUS_DEVICE_GET_CLASS(dev);
qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq);
if (sbd->connect_irq_notifier) {
sbd->connect_irq_notifier(dev, irq);
}
}
/* Check whether an MMIO region exists */
bool sysbus_has_mmio(SysBusDevice *dev, unsigned int n)
{
return (n < dev->num_mmio);
}
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_unmap(SysBusDevice *dev, int n)
{
assert(n >= 0 && n < dev->num_mmio);
if (dev->mmio[n].addr != (hwaddr)-1) {
memory_region_del_subregion(get_system_memory(), dev->mmio[n].memory);
dev->mmio[n].addr = (hwaddr)-1;
}
}
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)
{
qdev_init_gpio_out_named(DEVICE(dev), p, SYSBUS_DEVICE_GPIO_IRQ, 1);
}
/* Pass IRQs from a target device. */
void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target)
{
qdev_pass_gpios(DEVICE(target), DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ);
}
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)
{
assert(n >= 0 && n < QDEV_MAX_MMIO);
return dev->mmio[n].memory;
}
void sysbus_init_ioports(SysBusDevice *dev, uint32_t ioport, uint32_t size)
{
uint32_t i;
for (i = 0; i < size; i++) {
assert(dev->num_pio < QDEV_MAX_PIO);
dev->pio[dev->num_pio++] = ioport++;
}
}
/* The purpose of preserving this empty realize function
* is to prevent the parent_realize field of some subclasses
* from being set to NULL to break the normal init/realize
* of some devices.
*/
static void sysbus_device_realize(DeviceState *dev, Error **errp)
{
}
DeviceState *sysbus_create_varargs(const char *name,
hwaddr addr, ...)
{
DeviceState *dev;
SysBusDevice *s;
va_list va;
qemu_irq irq;
int n;
dev = qdev_new(name);
s = SYS_BUS_DEVICE(dev);
sysbus_realize_and_unref(s, &error_fatal);
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;
}
bool sysbus_realize(SysBusDevice *dev, Error **errp)
{
return qdev_realize(DEVICE(dev), sysbus_get_default(), errp);
}
bool sysbus_realize_and_unref(SysBusDevice *dev, Error **errp)
{
return qdev_realize_and_unref(DEVICE(dev), sysbus_get_default(), errp);
}
static void sysbus_dev_print(Monitor *mon, DeviceState *dev, int indent)
{
SysBusDevice *s = SYS_BUS_DEVICE(dev);
hwaddr size;
int i;
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);
SysBusDeviceClass *sbc = SYS_BUS_DEVICE_GET_CLASS(s);
char *addr, *fw_dev_path;
if (sbc->explicit_ofw_unit_address) {
addr = sbc->explicit_ofw_unit_address(s);
if (addr) {
fw_dev_path = g_strdup_printf("%s@%s", qdev_fw_name(dev), addr);
g_free(addr);
return fw_dev_path;
}
}
if (s->num_mmio) {
return g_strdup_printf("%s@" TARGET_FMT_plx, qdev_fw_name(dev),
s->mmio[0].addr);
}
if (s->num_pio) {
return g_strdup_printf("%s@i%04x", qdev_fw_name(dev), s->pio[0]);
}
return g_strdup(qdev_fw_name(dev));
}
void sysbus_add_io(SysBusDevice *dev, hwaddr addr,
MemoryRegion *mem)
{
memory_region_add_subregion(get_system_io(), addr, 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->realize = sysbus_device_realize;
k->bus_type = TYPE_SYSTEM_BUS;
/*
* device_add plugs devices into a 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 will probably not work
*
* However, a few machines can handle device_add/-device with
* a few specific sysbus devices. In those cases, the device
* subclass needs to override it and set user_creatable=true.
*/
k->user_creatable = false;
}
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,
};
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;
}
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)
