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-rw-r--r--arch/powerpc/include/asm/prom.h39
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/prom.h b/arch/powerpc/include/asm/prom.h
index d977b9b78696..74b79f07f041 100644
--- a/arch/powerpc/include/asm/prom.h
+++ b/arch/powerpc/include/asm/prom.h
@@ -26,6 +26,45 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
+#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
+#define OF_DT_END_NODE 0x2 /* End node */
+#define OF_DT_PROP 0x3 /* Property: name off, size,
+ * content */
+#define OF_DT_NOP 0x4 /* nop */
+#define OF_DT_END 0x9
+
+#define OF_DT_VERSION 0x10
+
+/*
+ * 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 {
+ __be32 magic; /* magic word OF_DT_HEADER */
+ __be32 totalsize; /* total size of DT block */
+ __be32 off_dt_struct; /* offset to structure */
+ __be32 off_dt_strings; /* offset to strings */
+ __be32 off_mem_rsvmap; /* offset to memory reserve map */
+ __be32 version; /* format version */
+ __be32 last_comp_version; /* last compatible version */
+ /* version 2 fields below */
+ __be32 boot_cpuid_phys; /* Physical CPU id we're booting on */
+ /* version 3 fields below */
+ __be32 dt_strings_size; /* size of the DT strings block */
+ /* version 17 fields below */
+ __be32 dt_struct_size; /* size of the DT structure block */
+};
+
/*
* OF address retreival & translation
*/