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authorGrant Likely <grant.likely@secretlab.ca>2009-10-15 10:57:55 -0600
committerGrant Likely <grant.likely@secretlab.ca>2009-10-15 10:57:55 -0600
commitd45d94f672e3c79b0db1e6d76e1638ee521d56c0 (patch)
treecc95f1b20773c60671a3c4e808e19f8e0a08c542 /include/linux/of_fdt.h
parentd8678b58708d7e6bf947ebd03eaf44baf2adfad8 (diff)
downloadop-kernel-dev-d45d94f672e3c79b0db1e6d76e1638ee521d56c0.zip
op-kernel-dev-d45d94f672e3c79b0db1e6d76e1638ee521d56c0.tar.gz
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>
Diffstat (limited to 'include/linux/of_fdt.h')
-rw-r--r--include/linux/of_fdt.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 8b5ecc1..b37ad3a 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 */
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