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[Qemu-devel] [PATCH v3 02/16] isa: rework ISA bus internals, and add ISA
From: |
Hervé Poussineau |
Subject: |
[Qemu-devel] [PATCH v3 02/16] isa: rework ISA bus internals, and add ISA bus ops structure |
Date: |
Sun, 2 Oct 2011 18:10:14 +0200 |
This allows future implementations of real pci-isa bridges
Signed-off-by: Hervé Poussineau <address@hidden>
---
Makefile.objs | 2 +-
hw/isa-bridge.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++
hw/isa-bus.c | 93 ++++++++++++++++++++++++++++++++++++-------------------
hw/isa.h | 18 ++++++++++-
qemu-common.h | 1 +
5 files changed, 165 insertions(+), 34 deletions(-)
create mode 100644 hw/isa-bridge.c
diff --git a/Makefile.objs b/Makefile.objs
index 8d23fbb..bab4b3f 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -276,7 +276,7 @@ hw-obj-$(CONFIG_AHCI) += ide/ich.o
hw-obj-$(CONFIG_LSI_SCSI_PCI) += lsi53c895a.o
hw-obj-$(CONFIG_ESP) += esp.o
-hw-obj-y += dma-helpers.o sysbus.o isa-bus.o
+hw-obj-y += dma-helpers.o sysbus.o isa-bus.o isa-bridge.o
hw-obj-y += qdev-addr.o
# VGA
diff --git a/hw/isa-bridge.c b/hw/isa-bridge.c
new file mode 100644
index 0000000..6f51701
--- /dev/null
+++ b/hw/isa-bridge.c
@@ -0,0 +1,85 @@
+/*
+ * Simple ISA bus bridge
+ *
+ * Copyright (c) 2011 Herve Poussineau
+ *
+ * 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 "isa.h"
+#include "sysbus.h"
+
+typedef struct {
+ SysBusDevice busdev;
+ ISABus bus;
+ qemu_irq *irqs;
+ MemoryRegion *io_space;
+} ISABridgeSysBusState;
+
+static void isabus_bridge_set_irqs(ISABus *bus, qemu_irq *irqs)
+{
+ ISABridgeSysBusState *s = container_of(bus, ISABridgeSysBusState, bus);
+ s->irqs = irqs;
+}
+
+static qemu_irq isabus_bridge_get_irq(ISABus *bus, int isairq)
+{
+ ISABridgeSysBusState *s = container_of(bus, ISABridgeSysBusState, bus);
+ if (!s->irqs || isairq < 0 || isairq > 15) {
+ hw_error("isa irq %d invalid", isairq);
+ }
+ return s->irqs[isairq];
+}
+
+static void isa_bridge_set_io_space(ISABus *bus, MemoryRegion* io_space)
+{
+ ISABridgeSysBusState *s = container_of(bus, ISABridgeSysBusState, bus);
+ s->io_space = io_space;
+}
+
+static MemoryRegion *isa_bridge_get_io_space(ISABus *bus)
+{
+ ISABridgeSysBusState *s = container_of(bus, ISABridgeSysBusState, bus);
+ return s->io_space;
+}
+
+static ISABusOps isabus_bridge_ops = {
+ .set_irqs = isabus_bridge_set_irqs,
+ .get_irq = isabus_bridge_get_irq,
+ .set_io_space = isa_bridge_set_io_space,
+ .get_io_space = isa_bridge_get_io_space,
+};
+
+static int isabus_bridge_init(SysBusDevice *dev)
+{
+ ISABridgeSysBusState *isa = FROM_SYSBUS(ISABridgeSysBusState, dev);
+ isa_bus_new(&isa->bus, &isabus_bridge_ops, &dev->qdev);
+ return 0;
+}
+
+static SysBusDeviceInfo isabus_bridge_info = {
+ .init = isabus_bridge_init,
+ .qdev.name = "isabus-bridge",
+ .qdev.fw_name = "isa",
+ .qdev.size = sizeof(ISABridgeSysBusState),
+ .qdev.no_user = 1,
+};
+
+static void isabus_bridge_register_devices(void)
+{
+ sysbus_register_withprop(&isabus_bridge_info);
+}
+
+device_init(isabus_bridge_register_devices)
+
diff --git a/hw/isa-bus.c b/hw/isa-bus.c
index ad225c6..f8b5dcb 100644
--- a/hw/isa-bus.c
+++ b/hw/isa-bus.c
@@ -22,13 +22,10 @@
#include "isa.h"
#include "exec-memory.h"
-struct ISABus {
- BusState qbus;
- MemoryRegion *address_space_io;
- qemu_irq *irqs;
-};
static ISABus *isabus;
target_phys_addr_t isa_mem_base = 0;
+static qemu_irq *isa_bus_default_irqs;
+static MemoryRegion *isa_bus_io_space;
static void isabus_dev_print(Monitor *mon, DeviceState *dev, int indent);
static char *isabus_get_fw_dev_path(DeviceState *dev);
@@ -40,6 +37,36 @@ static struct BusInfo isa_bus_info = {
.get_fw_dev_path = isabus_get_fw_dev_path,
};
+static void isa_bus_default_set_irqs(ISABus *bus, qemu_irq *irqs)
+{
+ isa_bus_default_irqs = irqs;
+}
+
+static qemu_irq isa_bus_default_get_irq(ISABus *bus, int isairq)
+{
+ if (isairq < 0 || isairq > 15) {
+ hw_error("isa irq %d invalid", isairq);
+ }
+ return isa_bus_default_irqs[isairq];
+}
+
+static void isa_bus_default_set_io_space(ISABus *bus, MemoryRegion *io_space)
+{
+ isa_bus_io_space = io_space;
+}
+
+static MemoryRegion *isa_bus_default_get_io_space(ISABus *bus)
+{
+ return isa_bus_io_space;
+}
+
+static ISABusOps isa_bus_default_ops = {
+ .set_irqs = isa_bus_default_set_irqs,
+ .get_irq = isa_bus_default_get_irq,
+ .set_io_space = isa_bus_default_set_io_space,
+ .get_io_space = isa_bus_default_get_io_space,
+};
+
ISABus *isa_bus_bridge_init(DeviceState *dev, MemoryRegion *address_space_io)
{
if (isabus) {
@@ -49,16 +76,32 @@ ISABus *isa_bus_bridge_init(DeviceState *dev, MemoryRegion
*address_space_io)
if (NULL == dev) {
dev = qdev_create(NULL, "isabus-bridge");
qdev_init_nofail(dev);
+ } else {
+ isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
+ isabus->ops = &isa_bus_default_ops;
}
- isabus = FROM_QBUS(ISABus, qbus_create(&isa_bus_info, dev, NULL));
- isabus->address_space_io = address_space_io;
+ isabus->ops->set_io_space(isabus, address_space_io);
+
return isabus;
}
+void isa_bus_new(ISABus *bus, ISABusOps *ops, DeviceState *host)
+{
+ if (isabus) {
+ hw_error("Can't create a second ISA bus");
+ }
+ qbus_create_inplace(&bus->qbus, &isa_bus_info, host, NULL);
+ bus->ops = ops;
+ isabus = bus;
+}
+
void isa_bus_irqs(qemu_irq *irqs)
{
- isabus->irqs = irqs;
+ if (!isabus || !isabus->ops->set_irqs) {
+ hw_error("Tried to set isa irqs with no isa bus present.");
+ }
+ isabus->ops->set_irqs(isabus, irqs);
}
/*
@@ -69,10 +112,10 @@ void isa_bus_irqs(qemu_irq *irqs)
*/
qemu_irq isa_get_irq(int isairq)
{
- if (isairq < 0 || isairq > 15) {
- hw_error("isa irq %d invalid", isairq);
+ if (!isabus || !isabus->ops->get_irq) {
+ hw_error("ISA bus invalid");
}
- return isabus->irqs[isairq];
+ return isabus->ops->get_irq(isabus, isairq);
}
void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq)
@@ -110,7 +153,13 @@ void isa_init_ioport(ISADevice *dev, uint16_t ioport)
void isa_register_ioport(ISADevice *dev, MemoryRegion *io, uint16_t start)
{
- memory_region_add_subregion(isabus->address_space_io, start, io);
+ ISABus *bus = isabus;
+
+ if (!bus || !bus->ops->get_io_space) {
+ hw_error("Tried to register I/O port with no isa bus present.");
+ }
+
+ memory_region_add_subregion(bus->ops->get_io_space(bus), start, io);
if (dev != NULL) {
assert(dev->nio < ARRAY_SIZE(dev->io));
dev->io[dev->nio++] = io;
@@ -182,25 +231,6 @@ static void isabus_dev_print(Monitor *mon, DeviceState
*dev, int indent)
}
}
-static int isabus_bridge_init(SysBusDevice *dev)
-{
- /* nothing */
- return 0;
-}
-
-static SysBusDeviceInfo isabus_bridge_info = {
- .init = isabus_bridge_init,
- .qdev.name = "isabus-bridge",
- .qdev.fw_name = "isa",
- .qdev.size = sizeof(SysBusDevice),
- .qdev.no_user = 1,
-};
-
-static void isabus_register_devices(void)
-{
- sysbus_register_withprop(&isabus_bridge_info);
-}
-
static char *isabus_get_fw_dev_path(DeviceState *dev)
{
ISADevice *d = (ISADevice*)dev;
@@ -220,4 +250,3 @@ MemoryRegion *isa_address_space(ISADevice *dev)
return get_system_memory();
}
-device_init(isabus_register_devices)
diff --git a/hw/isa.h b/hw/isa.h
index d2b3cba..3437199 100644
--- a/hw/isa.h
+++ b/hw/isa.h
@@ -7,7 +7,7 @@
#include "memory.h"
#include "qdev.h"
-typedef struct ISABus ISABus;
+typedef struct ISABusOps ISABusOps;
typedef struct ISADevice ISADevice;
typedef struct ISADeviceInfo ISADeviceInfo;
@@ -27,7 +27,23 @@ struct ISADeviceInfo {
isa_qdev_initfn init;
};
+/* isa-bus.c */
+
+struct ISABus {
+ BusState qbus;
+ ISABusOps *ops;
+};
+
+struct ISABusOps {
+ void (*set_irqs)(ISABus *bus, qemu_irq *irqs);
+ qemu_irq (*get_irq)(ISABus *bus, int isairq);
+ void (*set_io_space)(ISABus *bus, MemoryRegion *address_space);
+ MemoryRegion *(*get_io_space)(ISABus *bus);
+};
+
ISABus *isa_bus_bridge_init(DeviceState *dev, MemoryRegion *address_space_io);
+
+void isa_bus_new(ISABus *bus, ISABusOps *ops, DeviceState *host);
void isa_bus_irqs(qemu_irq *irqs);
qemu_irq isa_get_irq(int isairq);
void isa_init_irq(ISADevice *dev, qemu_irq *p, int isairq);
diff --git a/qemu-common.h b/qemu-common.h
index 5e87bdf..e3a470d 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -243,6 +243,7 @@ typedef struct VLANClientState VLANClientState;
typedef struct i2c_bus i2c_bus;
typedef struct i2c_slave i2c_slave;
typedef struct SMBusDevice SMBusDevice;
+typedef struct ISABus ISABus;
typedef struct PCIHostState PCIHostState;
typedef struct PCIExpressHost PCIExpressHost;
typedef struct PCIBus PCIBus;
--
1.7.6.3
- [Qemu-devel] [PATCH v3 00/16] ISA bus improvements, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 01/16] isa: rename isa_bus_new to isa_bus_bridge_init, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 03/16] isa: correctly implement isa_address_space(), by calling a bus-specific function, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 02/16] isa: rework ISA bus internals, and add ISA bus ops structure,
Hervé Poussineau <=
- [Qemu-devel] [PATCH v3 04/16] audio: give ISA bus to sound cards, instead of PIC, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 05/16] pc: improve bus implementation of PIIX3 bridge, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 06/16] fulong2e: improve bus implementation of vt82c bridge, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 07/16] sun4u: improve bus implementation of EBus bridge, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 08/16] malta: improve bus implementation of PIIX4 bridge, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 09/16] isa: remove unused parameter to isa_bus_bridge_init(), Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 12/16] isa: give bus to isa_get_irq() and isa_bus_irqs(), Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 13/16] isa: use bus given in parameter to get/set irqs on specified ISA bus, Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 15/16] isa: remove useless test in isa_register_ioport(), Hervé Poussineau, 2011/10/02
- [Qemu-devel] [PATCH v3 16/16] isa: remove limitation of only one ISA bus, Hervé Poussineau, 2011/10/02