[Qemu-devel] [PATCH v2] hw/misc/blob-loader: add a generic blob loader

[Li Guang <lig.fnst@cn.fujitsu.com>]

this blob loader will be used to load a specified
blob into a specified RAM address.

Signed-off-by: Li Guang <lig.fnst@cn.fujitsu.com>
Suggested-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---
 hw/misc/Makefile.objs         |    2 +
 hw/misc/blob-loader.c         |  112 +++++++++++++++++++++++++++++++++++++++++
 include/hw/misc/blob-loader.h |   17 ++++++
 3 files changed, 131 insertions(+), 0 deletions(-)
 create mode 100644 hw/misc/blob-loader.c
 create mode 100644 include/hw/misc/blob-loader.h

diff --git a/hw/misc/Makefile.objs b/hw/misc/Makefile.objs
index f674365..3edbd5c 100644
--- a/hw/misc/Makefile.objs
+++ b/hw/misc/Makefile.objs
@@ -42,3 +42,5 @@ obj-$(CONFIG_SLAVIO) += slavio_misc.o
 obj-$(CONFIG_ZYNQ) += zynq_slcr.o
 
 obj-$(CONFIG_PVPANIC) += pvpanic.o
+
+common-obj-y += blob-loader.o
diff --git a/hw/misc/blob-loader.c b/hw/misc/blob-loader.c
new file mode 100644
index 0000000..4f790e5
--- /dev/null
+++ b/hw/misc/blob-loader.c
@@ -0,0 +1,112 @@
+/*
+ * generic blob loader
+ *
+ * Copyright (C) 2014 Li Guang
+ * Written by Li Guang <lig.fnst@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License
+ * for more details.
+ */
+
+#include "hw/sysbus.h"
+#include "hw/devices.h"
+#include "hw/loader.h"
+#include "hw/misc/blob-loader.h"
+#include "qemu/error-report.h"
+
+static Property blob_loader_props[] = {
+    DEFINE_PROP_UINT64("addr", BlobLoaderState, addr, 0),
+    DEFINE_PROP_STRING("file", BlobLoaderState, file),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static int load_blob_into_ram(const char *file,  uint64_t addr,  int count)
+{
+    int fd = -1, size;
+    uint8_t *data;
+
+    fd = open(file, O_RDONLY | O_BINARY);
+    if (fd == -1) {
+        error_report("can't open file %s\n", file);
+        return -1;
+    }
+    lseek(fd, 0, SEEK_SET);
+    data = g_malloc0(count);
+    size = read(fd, data, count);
+    if (count != size) {
+        error_report("%s: read error: %d (expected %d)\n", file, size, count);
+        return -1;
+    }
+    close(fd);
+
+    cpu_physical_memory_write_rom(addr, data, size);
+
+    g_free(data);
+    data = NULL;
+
+    return 0;
+}
+
+static void blob_loader_reset(DeviceState *dev)
+{
+    BlobLoaderState *s = BLOB_LOADER(dev);
+    int file_size;
+
+    file_size = get_image_size(s->file);
+    if (file_size < 0) {
+        error_report("can't get file size of %s\n", s->file);
+        exit(1);
+    }
+
+    if (load_blob_into_ram(s->file, s->addr, file_size) < 0) {
+        error_report("can't load %s\n", s->file);
+        exit(1);
+    }
+}
+
+static void blob_loader_realize(DeviceState *dev, Error **errp)
+{
+    BlobLoaderState *s = BLOB_LOADER(dev);
+    char *file_name;
+
+    if (s->file == NULL) {
+        error_setg(errp, "please spicify a file for blob loader.\n");
+        return;
+    }
+    file_name = qemu_find_file(QEMU_FILE_TYPE_BIOS, s->file);
+    if (file_name == NULL) {
+        error_setg(errp, "can't find %s\n", s->file);
+        return;
+    }
+}
+
+static void blob_loader_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->reset = blob_loader_reset;
+    dc->realize = blob_loader_realize;
+    dc->props = blob_loader_props;
+    dc->desc = "blob loader";
+}
+
+static TypeInfo blob_loader_info = {
+    .name = TYPE_BLOB_LOADER,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(BlobLoaderState),
+    .class_init = blob_loader_class_init,
+};
+
+static void blob_loader_register_type(void)
+{
+    type_register_static(&blob_loader_info);
+}
+
+type_init(blob_loader_register_type)
diff --git a/include/hw/misc/blob-loader.h b/include/hw/misc/blob-loader.h
new file mode 100644
index 0000000..478fd8d
--- /dev/null
+++ b/include/hw/misc/blob-loader.h
@@ -0,0 +1,17 @@
+#ifndef BLOB_LOADER_H
+#define BLOB_LOADER_H
+
+typedef struct BlobLoaderState {
+    /*< private >*/
+    DeviceState parent_obj;
+    /*< public >*/
+
+    uint64_t addr;
+    char *file;
+} BlobLoaderState;
+
+#define TYPE_BLOB_LOADER "blob-loader"
+#define BLOB_LOADER(obj) OBJECT_CHECK(BlobLoaderState, (obj), TYPE_BLOB_LOADER)
+
+#endif
+
-- 
1.7.2.5