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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2005-08-09 04:36:34 -0400
committerPaul Mackerras <paulus@samba.org>2005-08-28 20:53:31 -0400
commit34153fa3af45d84f3221d9b67ba2ab7e8a220d28 (patch)
tree74f69cd35bef255583acaac181324558a286e40c /include/asm-ppc64/prom.h
parente28f7faf05159f1cfd564596f5e6178edba6bd49 (diff)
[PATCH] flattened device tree changes
This patch updates the format of the flattened device-tree passed between the boot trampoline and the kernel to support a more compact representation, for use by embedded systems mostly. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'include/asm-ppc64/prom.h')
-rw-r--r--include/asm-ppc64/prom.h14
1 files changed, 9 insertions, 5 deletions
diff --git a/include/asm-ppc64/prom.h b/include/asm-ppc64/prom.h
index 04b1a84f7ca3..dc5330b39509 100644
--- a/include/asm-ppc64/prom.h
+++ b/include/asm-ppc64/prom.h
@@ -22,13 +22,15 @@
22#define RELOC(x) (*PTRRELOC(&(x))) 22#define RELOC(x) (*PTRRELOC(&(x)))
23 23
24/* Definitions used by the flattened device tree */ 24/* Definitions used by the flattened device tree */
25#define OF_DT_HEADER 0xd00dfeed /* 4: version, 4: total size */ 25#define OF_DT_HEADER 0xd00dfeed /* marker */
26#define OF_DT_BEGIN_NODE 0x1 /* Start node: full name */ 26#define OF_DT_BEGIN_NODE 0x1 /* Start of node, full name */
27#define OF_DT_END_NODE 0x2 /* End node */ 27#define OF_DT_END_NODE 0x2 /* End node */
28#define OF_DT_PROP 0x3 /* Property: name off, size, content */ 28#define OF_DT_PROP 0x3 /* Property: name off, size,
29 * content */
30#define OF_DT_NOP 0x4 /* nop */
29#define OF_DT_END 0x9 31#define OF_DT_END 0x9
30 32
31#define OF_DT_VERSION 1 33#define OF_DT_VERSION 0x10
32 34
33/* 35/*
34 * This is what gets passed to the kernel by prom_init or kexec 36 * This is what gets passed to the kernel by prom_init or kexec
@@ -54,7 +56,9 @@ struct boot_param_header
54 u32 version; /* format version */ 56 u32 version; /* format version */
55 u32 last_comp_version; /* last compatible version */ 57 u32 last_comp_version; /* last compatible version */
56 /* version 2 fields below */ 58 /* version 2 fields below */
57 u32 boot_cpuid_phys; /* Which physical CPU id we're booting on */ 59 u32 boot_cpuid_phys; /* Physical CPU id we're booting on */
60 /* version 3 fields below */
61 u32 dt_strings_size; /* size of the DT strings block */
58}; 62};
59 63
60 64