From: Jiri Gaisler <j...@gaisler.se>
AMBA plug&play is used by kernels to probe available devices (Timers,
UART, etc...). This is a static declaration of devices implemented in
QEMU. In the future, a more advanced version could compute those
information directly from the device tree.
Signed-off-by: Fabien Chouteau <chout...@adacore.com>
---
V2:
- AHB and APB PNP are now grouped in one device
- Initialisation moved to .instance_init
- Minor fixes
hw/sparc/Makefile.objs | 1 +
hw/sparc/grlib_ambapnp.c | 149 ++++++++++++++++++++++++++++++++++++++++++++++
hw/sparc/leon3.c | 3 +
include/hw/sparc/grlib.h | 22 +++++++
4 files changed, 175 insertions(+)
create mode 100644 hw/sparc/grlib_ambapnp.c
diff --git a/hw/sparc/Makefile.objs b/hw/sparc/Makefile.objs
index c987b5b..e763701 100644
--- a/hw/sparc/Makefile.objs
+++ b/hw/sparc/Makefile.objs
@@ -1 +1,2 @@
obj-y += sun4m.o leon3.o
+obj-$(CONFIG_GRLIB) += grlib_ambapnp.o
diff --git a/hw/sparc/grlib_ambapnp.c b/hw/sparc/grlib_ambapnp.c
new file mode 100644
index 0000000..dd53004
--- /dev/null
+++ b/hw/sparc/grlib_ambapnp.c
@@ -0,0 +1,149 @@
+/*
+ * QEMU GRLIB AMBA Plug&Play Emulator
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/sysbus.h"
+#include "hw/sparc/grlib.h"
+
+/* Size of memory mapped registers */
+#define APBPNP_REG_SIZE (4096 - 8)
+#define AHBPNP_REG_SIZE 4096
+
+#define GRLIB_AMBA_PNP(obj) \
+ OBJECT_CHECK(AMBAPNP, (obj), TYPE_GRLIB_AMBA_PNP)
+
+typedef struct AMBAPNP {
+ SysBusDevice parent_obj;
+ MemoryRegion ahb_iomem;
+ MemoryRegion apb_iomem;
+} AMBAPNP;
+
+/* APB PNP */
+
+static uint64_t grlib_apbpnp_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ uint64_t read_data;
+ addr &= 0xfff;
+
+ /* Unit registers */
+ switch (addr & 0xffc) {
+ case 0x00:
+ read_data = 0x0400f000; /* Memory controller */
+ break;
+ case 0x04:
+ read_data = 0x0000fff1;
+ break;
+ case 0x08:
+ read_data = 0x0100c023; /* APBUART */
+ break;
+ case 0x0C:
+ read_data = 0x0010fff1;
+ break;
+ case 0x10:
+ read_data = 0x0100d040; /* IRQMP */
+ break;
+ case 0x14:
+ read_data = 0x0020fff1;
+ break;
+ case 0x18:
+ read_data = 0x01011006; /* GPTIMER */
+ break;
+ case 0x1C:
+ read_data = 0x0030fff1;
+ break;
+
+ default:
+ read_data = 0;
+ }
+ if (size == 1) {
+ read_data >>= (24 - (addr & 3) * 8);
+ read_data &= 0x0ff;
+ }
+ return read_data;
+}
+
+static const MemoryRegionOps grlib_apbpnp_ops = {
+ .read = grlib_apbpnp_read,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+/* AHB PNP */
+
+static uint64_t grlib_ahbpnp_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ addr &= 0xffc;
+
+ /* Unit registers */
+ switch (addr) {
+ case 0:
+ return 0x01003000; /* LEON3 */
+ case 0x800:
+ return 0x0400f000; /* Memory controller */
+ case 0x810:
+ return 0x0003e002;
+ case 0x814:
+ return 0x2000e002;
+ case 0x818:
+ return 0x4003c002;
+ case 0x820:
+ return 0x01006000; /* APB bridge @ 0x80000000 */
+ case 0x830:
+ return 0x8000fff2;
+
+ default:
+ return 0;
+ }
+}
+
+static const MemoryRegionOps grlib_ahbpnp_ops = {
+ .read = grlib_ahbpnp_read,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void grlib_ambapnp_init(Object *obj)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+ AMBAPNP *pnp = GRLIB_AMBA_PNP(obj);
+
+ memory_region_init_io(&pnp->ahb_iomem, OBJECT(pnp), &grlib_ahbpnp_ops, pnp,
+ "ahbpnp", AHBPNP_REG_SIZE);
+ sysbus_init_mmio(sbd, &pnp->ahb_iomem);
+
+ memory_region_init_io(&pnp->apb_iomem, OBJECT(pnp), &grlib_apbpnp_ops, pnp,
+ "apbpnp", APBPNP_REG_SIZE);
+ sysbus_init_mmio(sbd, &pnp->apb_iomem);
+}
+
+static const TypeInfo grlib_ambapnp_info = {
+ .name = TYPE_GRLIB_AMBA_PNP,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AMBAPNP),
+ .instance_init = grlib_ambapnp_init,
+};
+
+static void grlib_ambapnp_register_types(void)
+{
+ type_register_static(&grlib_ambapnp_info);
+}
+
+type_init(grlib_ambapnp_register_types)
diff --git a/hw/sparc/leon3.c b/hw/sparc/leon3.c
index 751392e..2962539 100644
--- a/hw/sparc/leon3.c
+++ b/hw/sparc/leon3.c
@@ -207,6 +207,9 @@ static void leon3_generic_hw_init(MachineState *machine)
}
}
+ /* Allocate AHB/APB PNP */
+ grlib_ambapnp_create(0xFFFFF000 /* AHB */, 0x800FF000 /* APB */);
+
/* Allocate timers */
grlib_gptimer_create(0x80000300, 2, CPU_CLK, cpu_irqs, 6);
diff --git a/include/hw/sparc/grlib.h b/include/hw/sparc/grlib.h
index 470ce72..5c098df 100644
--- a/include/hw/sparc/grlib.h
+++ b/include/hw/sparc/grlib.h
@@ -123,4 +123,26 @@ DeviceState *grlib_apbuart_create(hwaddr base,
return dev;
}
+
+/* AMBA PNP */
+
+#define TYPE_GRLIB_AMBA_PNP "grlib,ambapnp"
+
+static inline
+DeviceState *grlib_ambapnp_create(hwaddr ahbpnp_base, hwaddr apbpnp_base)
+{
+ DeviceState *dev;
+
+ dev = qdev_create(NULL, TYPE_GRLIB_AMBA_PNP);
+
+ if (qdev_init(dev)) {
+ return NULL;
+ }
+
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, ahbpnp_base);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 1, apbpnp_base);
+
+ return dev;
+}
+
#endif /* ! _GRLIB_H_ */
--
1.7.9.5
