new file mode 100644
@@ -0,0 +1,107 @@
+/*
+ * QEMU SiFive PRCI (Power, Reset, Clock, Interrupt)
+ *
+ * Copyright (c) 2017 SiFive, Inc.
+ *
+ * Simple model of the PRCI to emulate register reads made by the SDK BSP
+ *
+ * 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 "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "target/riscv/cpu.h"
+#include "hw/riscv/sifive_prci.h"
+
+/* currently implements enough to mock freedom-e-sdk BSP clock programming */
+
+static uint64_t sifive_prci_read(void *opaque, hwaddr addr, unsigned int size)
+{
+ if (addr == 0 /* PRCI_HFROSCCFG */) {
+ return 1 << 31; /* ROSC_RDY */
+ }
+ if (addr == 8 /* PRCI_PLLCFG */) {
+ return 1 << 31; /* PLL_LOCK */
+ }
+ hw_error("%s: read: addr=0x%x\n", __func__, (int)addr);
+ return 0;
+}
+
+static void sifive_prci_write(void *opaque, hwaddr addr,
+ uint64_t val64, unsigned int size)
+{
+ /* discard writes */
+}
+
+static const MemoryRegionOps sifive_prci_ops = {
+ .read = sifive_prci_read,
+ .write = sifive_prci_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid = {
+ .min_access_size = 4,
+ .max_access_size = 4
+ }
+};
+
+static Property sifive_prci_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void sifive_prci_init(Object *obj)
+{
+ SiFivePRCIState *s = SIFIVE_PRCI(obj);
+
+ memory_region_init_io(&s->mmio, obj, &sifive_prci_ops, s,
+ TYPE_SIFIVE_PRCI, 0x8000);
+ sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
+}
+
+static void sifive_prci_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->props = sifive_prci_properties;
+}
+
+static const TypeInfo sifive_prci_info = {
+ .name = TYPE_SIFIVE_PRCI,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(SiFivePRCIState),
+ .instance_init = sifive_prci_init,
+ .class_init = sifive_prci_class_init,
+};
+
+static void sifive_prci_register_types(void)
+{
+ type_register_static(&sifive_prci_info);
+}
+
+type_init(sifive_prci_register_types)
+
+
+/*
+ * Create PRCI device.
+ */
+DeviceState *sifive_prci_create(hwaddr addr)
+{
+ DeviceState *dev = qdev_create(NULL, TYPE_SIFIVE_PRCI);
+ qdev_init_nofail(dev);
+ sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
+ return dev;
+}
new file mode 100644
@@ -0,0 +1,43 @@
+/*
+ * QEMU SiFive PRCI (Power, Reset, Clock, Interrupt) interface
+ *
+ * Copyright (c) 2017 SiFive, Inc.
+ *
+ * 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.
+ */
+
+#ifndef HW_SIFIVE_PRCI_H
+#define HW_SIFIVE_PRCI_H
+
+#define TYPE_SIFIVE_PRCI "riscv.sifive.prci"
+
+#define SIFIVE_PRCI(obj) \
+ OBJECT_CHECK(SiFivePRCIState, (obj), TYPE_SIFIVE_PRCI)
+
+typedef struct SiFivePRCIState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ /*< public >*/
+ MemoryRegion mmio;
+} SiFivePRCIState;
+
+DeviceState *sifive_prci_create(hwaddr addr);
+
+#endif
Simple model of the PRCI (Power, Reset, Clock, Interrupt) to emulate register reads made by the SDK BSP. Signed-off-by: Michael Clark <mjc@sifive.com> --- hw/riscv/sifive_prci.c | 107 +++++++++++++++++++++++++++++++++++++++++ include/hw/riscv/sifive_prci.h | 43 +++++++++++++++++ 2 files changed, 150 insertions(+) create mode 100644 hw/riscv/sifive_prci.c create mode 100644 include/hw/riscv/sifive_prci.h