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Re: [Qemu-devel] [PATCH 4/6] Implement device tree support needed for Ba
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH 4/6] Implement device tree support needed for Bamboo emulation |
Date: |
Thu, 11 Dec 2008 15:33:38 -0600 |
User-agent: |
Thunderbird 2.0.0.17 (X11/20080925) |
Hollis Blanchard wrote:
diff --git a/device_tree.c b/device_tree.c
new file mode 100644
index 0000000..d7350e3
--- /dev/null
+++ b/device_tree.c
@@ -0,0 +1,116 @@
+/*
+ * Functions to help device tree manipulation using libfdt.
+ * It also provides functions to read entries from device tree proc
+ * interface.
+ *
+ * Copyright 2008 IBM Corporation.
+ * Authors: Jerone Young <address@hidden>
+ * Hollis Blanchard <address@hidden>
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ *
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+#include "config.h"
+#include "qemu-common.h"
+#include "sysemu.h"
+#include "device_tree.h"
+
+#include "libfdt.h"
#include <libfdt.h>
+void *load_device_tree(const char *filename_path, void *load_addr)
+{
+ int dt_file_size;
+ int dt_file_load_size;
+ int new_dt_size;
+ int ret;
+ void *dt_file = NULL;
+ void *fdt;
+
+ dt_file_size = get_image_size(filename_path);
+ if (dt_file_size < 0) {
+ printf("Unable to get size of device tree file '%s'\n",
+ filename_path);
+ goto fail;
+ }
+
+ /* First allocate space in qemu for device tree */
+ dt_file = qemu_malloc(dt_file_size);
+ if (dt_file == NULL) {
+ printf("Unable to allocate memory in qemu for device tree\n");
+ goto fail;
+ }
+ memset(dt_file, 0, dt_file_size);
qemu_mallocz(). Indent is still bad.
+ dt_file_load_size = load_image(filename_path, dt_file);
+
+ /* Second we place new copy of 2x size in guest memory
+ * This give us enough room for manipulation.
+ */
+ new_dt_size = dt_file_size * 2;
+
+ fdt = load_addr;
+ ret = fdt_open_into(dt_file, fdt, new_dt_size);
+ if (ret) {
+ printf("Unable to copy device tree in memory\n");
+ goto fail;
+ }
+
+ /* Check sanity of device tree */
+ if (fdt_check_header(fdt)) {
+ printf ("Device tree file loaded into memory is invalid: %s\n",
+ filename_path);
+ goto fail;
+ }
+ /* free qemu memory with old device tree */
+ qemu_free(dt_file);
+ return fdt;
+
+fail:
+ if (dt_file)
+ qemu_free(dt_file);
free() can safely take a NULL value.
+ return NULL;
+}
+
+int qemu_devtree_setprop(void *fdt, const char *node_path,
+ const char *property, uint32_t *val_array, int size)
+{
+ int offset;
+
+ offset = fdt_path_offset(fdt, node_path);
+ if (offset < 0)
+ return offset;
This is just goofy :-)
diff --git a/device_tree.h b/device_tree.h
new file mode 100644
index 0000000..9e6ef3d
--- /dev/null
+++ b/device_tree.h
@@ -0,0 +1,26 @@
+/*
+ * Header with function prototypes to help device tree manipulation using
+ * libfdt. It also provides functions to read entries from device tree proc
+ * interface.
+ *
+ * Copyright 2008 IBM Corporation.
+ * Authors: Jerone Young <address@hidden>
+ * Hollis Blanchard <address@hidden>
+ *
+ * This work is licensed under the GNU GPL license version 2 or later.
+ *
+ */
+
+#ifndef __DEVICE_TREE_H__
+#define __DEVICE_TREE_H__
+
+void *load_device_tree(const char *filename_path, void *load_addr);
+
+int qemu_devtree_setprop(void *fdt, const char *node_path,
+ const char *property, uint32_t *val_array, int size);
+int qemu_devtree_setprop_cell(void *fdt, const char *node_path,
+ const char *property, uint32_t val);
+int qemu_devtree_setprop_string(void *fdt, const char *node_path,
+ const char *property, const char *string);
+
+#endif /* __DEVICE_TREE_H__ */
diff --git a/libfdt_env.h b/libfdt_env.h
new file mode 100644
index 0000000..59f2536
--- /dev/null
+++ b/libfdt_env.h
Missing copyright?
Regards,
Anthony Liguori
- [Qemu-devel] PowerPC KVM support, Hollis Blanchard, 2008/12/11
- [Qemu-devel] [PATCH 1/6] Include headers for types used in helper_regs.h, Hollis Blanchard, 2008/12/11
- [Qemu-devel] [PATCH 4/6] Implement device tree support needed for Bamboo emulation, Hollis Blanchard, 2008/12/11
- Re: [Qemu-devel] [PATCH 4/6] Implement device tree support needed for Bamboo emulation,
Anthony Liguori <=
- [Qemu-devel] [PATCH 2/6] kvm: sync vcpu state during initialization, Hollis Blanchard, 2008/12/11
- [Qemu-devel] Re: [PATCH 2/6] kvm: sync vcpu state during initialization, Hollis Blanchard, 2008/12/11
- Re: [Qemu-devel] [PATCH 2/6] kvm: sync vcpu state during initialization, Anthony Liguori, 2008/12/11
- Re: [Qemu-devel] [PATCH 2/6] kvm: sync vcpu state during initialization, Hollis Blanchard, 2008/12/12
- Re: [Qemu-devel] [PATCH 2/6] kvm: sync vcpu state during initialization, Hollis Blanchard, 2008/12/12
- Re: [Qemu-devel] [PATCH 2/6] kvm: sync vcpu state during initialization, Anthony Liguori, 2008/12/13
[Qemu-devel] [PATCH 3/6] Enable KVM for ppcemb., Hollis Blanchard, 2008/12/11