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authorPaul Brook <paul@codesourcery.com>2009-05-14 22:35:06 +0100
committerPaul Brook <paul@codesourcery.com>2009-05-14 22:35:06 +0100
commitaae9460e244c7abe70b72ff374b3aa102bb09691 (patch)
treeaeed206df23f689a13c332ac9831e382a684dd57 /hw/sysbus.c
parent019d6b8ff0d495ded6977f24a4e8fd1c7fec09e0 (diff)
Basic qdev infrastructure.
Signed-off-by: Paul Brook <paul@codesourcery.com>
Diffstat (limited to 'hw/sysbus.c')
-rw-r--r--hw/sysbus.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/hw/sysbus.c b/hw/sysbus.c
new file mode 100644
index 000000000..e6cb7dd78
--- /dev/null
+++ b/hw/sysbus.c
@@ -0,0 +1,139 @@
+/*
+ * 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"
+
+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, void *opaque)
+{
+ sysbus_initfn init = (sysbus_initfn)opaque;
+
+ init(sysbus_from_qdev(dev));
+}
+
+void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init)
+{
+ assert(size >= sizeof(SysBusDevice));
+ qdev_register(name, size, sysbus_device_init, init);
+}
+
+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;
+}