of: merge struct boot_param_header from Microblaze and PowerPC

Merge common code for working with Flattened Device Tree data structure

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: Stephen Rothwell <sfr@canb.auug.org.au>

1 files changed, 32 insertions, 0 deletions

diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 8b5ecc1cb6aa..b37ad3a973b9 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -23,4 +23,36 @@
 
 #define OF_DT_VERSION           0x10
 
+#ifndef __ASSEMBLY__
+/*
+ * This is what gets passed to the kernel by prom_init or kexec
+ *
+ * The dt struct contains the device tree structure, full pathes and
+ * property contents. The dt strings contain a separate block with just
+ * the strings for the property names, and is fully page aligned and
+ * self contained in a page, so that it can be kept around by the kernel,
+ * each property name appears only once in this page (cheap compression)
+ *
+ * the mem_rsvmap contains a map of reserved ranges of physical memory,
+ * passing it here instead of in the device-tree itself greatly simplifies
+ * the job of everybody. It's just a list of u64 pairs (base/size) that
+ * ends when size is 0
+ */
+struct boot_param_header {
+        u32     magic;                  /* magic word OF_DT_HEADER */
+        u32     totalsize;              /* total size of DT block */
+        u32     off_dt_struct;          /* offset to structure */
+        u32     off_dt_strings;         /* offset to strings */
+        u32     off_mem_rsvmap;         /* offset to memory reserve map */
+        u32     version;                /* format version */
+        u32     last_comp_version;      /* last compatible version */
+        /* version 2 fields below */
+        u32     boot_cpuid_phys;        /* Physical CPU id we're booting on */
+        /* version 3 fields below */
+        u32     dt_strings_size;        /* size of the DT strings block */
+        /* version 17 fields below */
+        u32     dt_struct_size;         /* size of the DT structure block */
+};
+
+#endif /* __ASSEMBLY__ */
 #endif /* _LINUX_OF_FDT_H */