Import Android's dt_table.h for DT image format

Android documentation defines the recommended image format for storing
DTB/DTBO files in a single dtbo.img image. This patch includes the
latest header file with the struct definitions for this format from
AOSP.

The header was adapted to U-Boot's coding style and the function
declarations were removed.

Signed-off-by: Alex Deymo <deymo@google.com>
[trini: Change SDPX tag location]
Signed-off-by: Tom Rini <trini@konsulko.com>

diff --git a/include/dt_table.h b/include/dt_table.h
new file mode 100644 (file)
index 0000000..7fb16e9
--- /dev/null
+++ b/include/dt_table.h
@@ -0,0 +1,49 @@
+/* SPDX-License-Identifier: BSD-3-Clause */
+/*
+ * This is from the Android Project,
+ * Repository: https://android.googlesource.com/platform/system/libufdt
+ * File: utils/src/dt_table.h
+ * Commit: 2626d8b9e4d8e8c6cc67ceb1dc4e05a47779785c
+ * Copyright (C) 2017 The Android Open Source Project
+ */
+
+#ifndef DT_TABLE_H
+#define DT_TABLE_H
+
+#include <linux/types.h>
+
+#define DT_TABLE_MAGIC                 0xd7b7ab1e
+#define DT_TABLE_DEFAULT_PAGE_SIZE     2048
+#define DT_TABLE_DEFAULT_VERSION       0
+
+struct dt_table_header {
+       u32 magic;              /* DT_TABLE_MAGIC */
+       u32 total_size;         /* includes dt_table_header + all dt_table_entry
+                                * and all dtb/dtbo
+                                */
+       u32 header_size;        /* sizeof(dt_table_header) */
+
+       u32 dt_entry_size;      /* sizeof(dt_table_entry) */
+       u32 dt_entry_count;     /* number of dt_table_entry */
+       u32 dt_entries_offset;  /* offset to the first dt_table_entry
+                                * from head of dt_table_header.
+                                * The value will be equal to header_size if
+                                * no padding is appended
+                                */
+       u32 page_size;          /* flash page size we assume */
+       u32 version;            /* DTBO image version, the current version is 0.
+                                * The version will be incremented when the
+                                * dt_table_header struct is updated.
+                                */
+};
+
+struct dt_table_entry {
+       u32 dt_size;
+       u32 dt_offset;          /* offset from head of dt_table_header */
+
+       u32 id;                 /* optional, must be zero if unused */
+       u32 rev;                /* optional, must be zero if unused */
+       u32 custom[4];          /* optional, must be zero if unused */
+};
+
+#endif