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-rw-r--r--hw/arm/Makefile.objs1
-rw-r--r--hw/arm/sysbus-fdt.c174
-rw-r--r--include/hw/arm/sysbus-fdt.h60
3 files changed, 235 insertions, 0 deletions
diff --git a/hw/arm/Makefile.objs b/hw/arm/Makefile.objs
index 4b09caf..cf346c1 100644
--- a/hw/arm/Makefile.objs
+++ b/hw/arm/Makefile.objs
@@ -5,6 +5,7 @@ obj-y += omap_sx1.o palm.o realview.o spitz.o stellaris.o
obj-y += tosa.o versatilepb.o vexpress.o virt.o xilinx_zynq.o z2.o
obj-$(CONFIG_ACPI) += virt-acpi-build.o
obj-y += netduino2.o
+obj-y += sysbus-fdt.o
obj-y += armv7m.o exynos4210.o pxa2xx.o pxa2xx_gpio.o pxa2xx_pic.o
obj-$(CONFIG_DIGIC) += digic.o
diff --git a/hw/arm/sysbus-fdt.c b/hw/arm/sysbus-fdt.c
new file mode 100644
index 0000000..3038b94
--- /dev/null
+++ b/hw/arm/sysbus-fdt.c
@@ -0,0 +1,174 @@
+/*
+ * ARM Platform Bus device tree generation helpers
+ *
+ * Copyright (c) 2014 Linaro Limited
+ *
+ * Authors:
+ * Alex Graf <agraf@suse.de>
+ * Eric Auger <eric.auger@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "hw/arm/sysbus-fdt.h"
+#include "qemu/error-report.h"
+#include "sysemu/device_tree.h"
+#include "hw/platform-bus.h"
+#include "sysemu/sysemu.h"
+
+/*
+ * internal struct that contains the information to create dynamic
+ * sysbus device node
+ */
+typedef struct PlatformBusFDTData {
+ void *fdt; /* device tree handle */
+ int irq_start; /* index of the first IRQ usable by platform bus devices */
+ const char *pbus_node_name; /* name of the platform bus node */
+ PlatformBusDevice *pbus;
+} PlatformBusFDTData;
+
+/*
+ * struct used when calling the machine init done notifier
+ * that constructs the fdt nodes of platform bus devices
+ */
+typedef struct PlatformBusFDTNotifierParams {
+ Notifier notifier;
+ ARMPlatformBusFDTParams *fdt_params;
+} PlatformBusFDTNotifierParams;
+
+/* struct that associates a device type name and a node creation function */
+typedef struct NodeCreationPair {
+ const char *typename;
+ int (*add_fdt_node_fn)(SysBusDevice *sbdev, void *opaque);
+} NodeCreationPair;
+
+/* list of supported dynamic sysbus devices */
+static const NodeCreationPair add_fdt_node_functions[] = {
+ {"", NULL}, /* last element */
+};
+
+/**
+ * add_fdt_node - add the device tree node of a dynamic sysbus device
+ *
+ * @sbdev: handle to the sysbus device
+ * @opaque: handle to the PlatformBusFDTData
+ *
+ * Checks the sysbus type belongs to the list of device types that
+ * are dynamically instantiable and if so call the node creation
+ * function.
+ */
+static int add_fdt_node(SysBusDevice *sbdev, void *opaque)
+{
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(add_fdt_node_functions); i++) {
+ if (!strcmp(object_get_typename(OBJECT(sbdev)),
+ add_fdt_node_functions[i].typename)) {
+ ret = add_fdt_node_functions[i].add_fdt_node_fn(sbdev, opaque);
+ assert(!ret);
+ return 0;
+ }
+ }
+ error_report("Device %s can not be dynamically instantiated",
+ qdev_fw_name(DEVICE(sbdev)));
+ exit(1);
+}
+
+/**
+ * add_all_platform_bus_fdt_nodes - create all the platform bus nodes
+ *
+ * builds the parent platform bus node and all the nodes of dynamic
+ * sysbus devices attached to it.
+ */
+static void add_all_platform_bus_fdt_nodes(ARMPlatformBusFDTParams *fdt_params)
+{
+ const char platcomp[] = "qemu,platform\0simple-bus";
+ PlatformBusDevice *pbus;
+ DeviceState *dev;
+ gchar *node;
+ uint64_t addr, size;
+ int irq_start, dtb_size;
+ struct arm_boot_info *info = fdt_params->binfo;
+ const ARMPlatformBusSystemParams *params = fdt_params->system_params;
+ const char *intc = fdt_params->intc;
+ void *fdt = info->get_dtb(info, &dtb_size);
+
+ /*
+ * If the user provided a dtb, we assume the dynamic sysbus nodes
+ * already are integrated there. This corresponds to a use case where
+ * the dynamic sysbus nodes are complex and their generation is not yet
+ * supported. In that case the user can take charge of the guest dt
+ * while qemu takes charge of the qom stuff.
+ */
+ if (info->dtb_filename) {
+ return;
+ }
+
+ assert(fdt);
+
+ node = g_strdup_printf("/platform@%"PRIx64, params->platform_bus_base);
+ addr = params->platform_bus_base;
+ size = params->platform_bus_size;
+ irq_start = params->platform_bus_first_irq;
+
+ /* Create a /platform node that we can put all devices into */
+ qemu_fdt_add_subnode(fdt, node);
+ qemu_fdt_setprop(fdt, node, "compatible", platcomp, sizeof(platcomp));
+
+ /* Our platform bus region is less than 32bits, so 1 cell is enough for
+ * address and size
+ */
+ qemu_fdt_setprop_cells(fdt, node, "#size-cells", 1);
+ qemu_fdt_setprop_cells(fdt, node, "#address-cells", 1);
+ qemu_fdt_setprop_cells(fdt, node, "ranges", 0, addr >> 32, addr, size);
+
+ qemu_fdt_setprop_phandle(fdt, node, "interrupt-parent", intc);
+
+ dev = qdev_find_recursive(sysbus_get_default(), TYPE_PLATFORM_BUS_DEVICE);
+ pbus = PLATFORM_BUS_DEVICE(dev);
+
+ /* We can only create dt nodes for dynamic devices when they're ready */
+ assert(pbus->done_gathering);
+
+ PlatformBusFDTData data = {
+ .fdt = fdt,
+ .irq_start = irq_start,
+ .pbus_node_name = node,
+ .pbus = pbus,
+ };
+
+ /* Loop through all dynamic sysbus devices and create their node */
+ foreach_dynamic_sysbus_device(add_fdt_node, &data);
+
+ g_free(node);
+}
+
+static void platform_bus_fdt_notify(Notifier *notifier, void *data)
+{
+ PlatformBusFDTNotifierParams *p = DO_UPCAST(PlatformBusFDTNotifierParams,
+ notifier, notifier);
+
+ add_all_platform_bus_fdt_nodes(p->fdt_params);
+ g_free(p->fdt_params);
+ g_free(p);
+}
+
+void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params)
+{
+ PlatformBusFDTNotifierParams *p = g_new(PlatformBusFDTNotifierParams, 1);
+
+ p->fdt_params = fdt_params;
+ p->notifier.notify = platform_bus_fdt_notify;
+ qemu_add_machine_init_done_notifier(&p->notifier);
+}
diff --git a/include/hw/arm/sysbus-fdt.h b/include/hw/arm/sysbus-fdt.h
new file mode 100644
index 0000000..e15bb81
--- /dev/null
+++ b/include/hw/arm/sysbus-fdt.h
@@ -0,0 +1,60 @@
+/*
+ * Dynamic sysbus device tree node generation API
+ *
+ * Copyright Linaro Limited, 2014
+ *
+ * Authors:
+ * Alex Graf <agraf@suse.de>
+ * Eric Auger <eric.auger@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2 or later, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef HW_ARM_SYSBUS_FDT_H
+#define HW_ARM_SYSBUS_FDT_H
+
+#include "hw/arm/arm.h"
+#include "qemu-common.h"
+#include "hw/sysbus.h"
+
+/*
+ * struct that contains dimensioning parameters of the platform bus
+ */
+typedef struct {
+ hwaddr platform_bus_base; /* start address of the bus */
+ hwaddr platform_bus_size; /* size of the bus */
+ int platform_bus_first_irq; /* first hwirq assigned to the bus */
+ int platform_bus_num_irqs; /* number of hwirq assigned to the bus */
+} ARMPlatformBusSystemParams;
+
+/*
+ * struct that contains all relevant info to build the fdt nodes of
+ * platform bus and attached dynamic sysbus devices
+ * in the future might be augmented with additional info
+ * such as PHY, CLK handles ...
+ */
+typedef struct {
+ const ARMPlatformBusSystemParams *system_params;
+ struct arm_boot_info *binfo;
+ const char *intc; /* parent interrupt controller name */
+} ARMPlatformBusFDTParams;
+
+/**
+ * arm_register_platform_bus_fdt_creator - register a machine init done
+ * notifier that creates the device tree nodes of the platform bus and
+ * associated dynamic sysbus devices
+ */
+void arm_register_platform_bus_fdt_creator(ARMPlatformBusFDTParams *fdt_params);
+
+#endif
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