Add minimal code to emulate A7MPCore DAP block needed to boot Linux
guest.
Cc: Peter Maydell <peter.mayd...@linaro.org>
Cc: Jason Wang <jasow...@redhat.com>
Cc: Philippe Mathieu-Daudé <f4...@amsat.org>
Cc: qemu-devel@nongnu.org
Cc: qemu-...@nongnu.org
Cc: yurov...@gmail.com
Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
---
hw/arm/Makefile.objs | 2 +-
hw/arm/coresight.c | 120 +++++++++++++++++++++++++++++++++++++++++++++
include/hw/arm/coresight.h | 24 +++++++++
3 files changed, 145 insertions(+), 1 deletion(-)
create mode 100644 hw/arm/coresight.c
create mode 100644 include/hw/arm/coresight.h
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 2794e086d6..692216e0cf 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -1,4 +1,4 @@
-obj-y += boot.o collie.o exynos4_boards.o gumstix.o highbank.o
+obj-y += boot.o collie.o exynos4_boards.o gumstix.o highbank.o coresight.o
obj-$(CONFIG_DIGIC) += digic_boards.o
obj-y += integratorcp.o mainstone.o musicpal.o nseries.o
obj-y += omap_sx1.o palm.o realview.o spitz.o stellaris.o
diff --git a/hw/arm/coresight.c b/hw/arm/coresight.c
new file mode 100644
index 0000000000..d0a8c1b005
--- /dev/null
+++ b/hw/arm/coresight.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2017, Impinj, Inc.
+ *
+ * CoreSight block emulation code
+ *
+ * Author: Andrey Smirnov <andrew.smir...@gmail.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/arm/coresight.h"
+#include "qemu/log.h"
+
+static uint64_t coresight_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ return 0;
+}
+
+static void coresight_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+}
+
+static const struct MemoryRegionOps coresight_ops = {
+ .read = coresight_read,
+ .write = coresight_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .impl = {
+ /*
+ * Our device would not work correctly if the guest was doing
+ * unaligned access. This might not be a limitation on the real
+ * device but in practice there is no reason for a guest to access
+ * this device unaligned.
+ */
+ .min_access_size = 4,
+ .max_access_size = 4,
+ .unaligned = false,
+ },
+};
+
+static void a7mpcore_dap_init(Object *obj)
+{
+ SysBusDevice *sd = SYS_BUS_DEVICE(obj);
+ A7MPCoreDAPState *s = A7MPCORE_DAP(obj);
+
+ memory_region_init(&s->container, obj, "a7mpcore-dap-container", 0x100000);
+ sysbus_init_mmio(sd, &s->container);
+
+ memory_region_init_io(&s->ca7_atb_funnel,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".ca7-atb-funnel",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x41000, &s->ca7_atb_funnel);
+
+ memory_region_init_io(&s->cpu0_etm,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".cpu0-etm",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x7C000, &s->cpu0_etm);
+
+ memory_region_init_io(&s->atb_funnel,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".atb-funnel",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x83000, &s->atb_funnel);
+
+ memory_region_init_io(&s->tmc_etb,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".tmc-etb",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x84000, &s->tmc_etb);
+
+ memory_region_init_io(&s->tmc_etr,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".tmc-etr",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x86000, &s->tmc_etr);
+
+ memory_region_init_io(&s->tpiu,
+ obj,
+ &coresight_ops,
+ s,
+ TYPE_A7MPCORE_DAP ".tpiu",
+ 0x1000);
+ memory_region_add_subregion(&s->container, 0x87000, &s->tpiu);
+}
+
+static void a7mpcore_dap_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->desc = "A7MPCore DAP Module";
+}
+
+static const TypeInfo a7mpcore_dap_info = {
+ .name = TYPE_A7MPCORE_DAP,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(A7MPCoreDAPState),
+ .instance_init = a7mpcore_dap_init,
+ .class_init = a7mpcore_dap_class_init,
+};
+
+static void coresight_register_type(void)
+{
+ type_register_static(&a7mpcore_dap_info);
+}
+type_init(coresight_register_type)
diff --git a/include/hw/arm/coresight.h b/include/hw/arm/coresight.h
new file mode 100644
index 0000000000..d1480e825b
--- /dev/null
+++ b/include/hw/arm/coresight.h
@@ -0,0 +1,24 @@
+#ifndef CORESIGHT_H
+#define CORESIGHT_H
+
+#include "hw/sysbus.h"
+
+typedef struct A7MPCoreDAPState {
+ /*< private >*/
+ SysBusDevice parent_obj;
+
+ MemoryRegion container;
+
+ MemoryRegion ca7_atb_funnel;
+ MemoryRegion cpu0_etm;
+ MemoryRegion atb_funnel;
+ MemoryRegion tmc_etb;
+ MemoryRegion tmc_etr;
+ MemoryRegion tpiu;
+
+} A7MPCoreDAPState;
+
+#define TYPE_A7MPCORE_DAP "a7mpcore-dap"
+#define A7MPCORE_DAP(obj) OBJECT_CHECK(A7MPCoreDAPState, (obj),
TYPE_A7MPCORE_DAP)
+
+#endif /* CORESIGHT_H */
--
2.14.3
