From 685d033f80fc860d27ac7627c029a3e483315d45 Mon Sep 17 00:00:00 2001 From: Wang Nan Date: Tue, 25 Mar 2014 12:09:43 +0800 Subject: Introduce helpers for computing dtb size This patch introduce fdt_node_len and fdt_prop_len to help for computing memory requirement when operating dtb. Signed-off-by: Wang Nan Acked-by: Dave Young Signed-off-by: Simon Horman --- kexec/libfdt/libfdt.h | 24 ++++++++++++++++++++++++ kexec/libfdt/libfdt_internal.h | 3 --- 2 files changed, 24 insertions(+), 3 deletions(-) diff --git a/kexec/libfdt/libfdt.h b/kexec/libfdt/libfdt.h index ce80e4f..87a24ab 100644 --- a/kexec/libfdt/libfdt.h +++ b/kexec/libfdt/libfdt.h @@ -1073,4 +1073,28 @@ int fdt_del_node(void *fdt, int nodeoffset); const char *fdt_strerror(int errval); +#define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1)) +#define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE)) + +/* + * if add a new subnode: + * see: fdt_add_subnode -> fdt_add_subnode_namelen + */ +static inline int fdt_node_len(const char* node_name) +{ + return sizeof(struct fdt_node_header) + + FDT_TAGALIGN(strlen(node_name) + 1) + FDT_TAGSIZE; +} + +/* + * if add a new prop: (assume prop_name not exist in strtab) + * see: fdt_setprop -> _fdt_add_property + */ +static inline int fdt_prop_len(const char* prop_name, int len) +{ + return (strlen(prop_name) + 1) + + sizeof(struct fdt_property) + + FDT_TAGALIGN(len); +} + #endif /* _LIBFDT_H */ diff --git a/kexec/libfdt/libfdt_internal.h b/kexec/libfdt/libfdt_internal.h index 46eb93e..7e6c4c8 100644 --- a/kexec/libfdt/libfdt_internal.h +++ b/kexec/libfdt/libfdt_internal.h @@ -52,9 +52,6 @@ */ #include -#define FDT_ALIGN(x, a) (((x) + (a) - 1) & ~((a) - 1)) -#define FDT_TAGALIGN(x) (FDT_ALIGN((x), FDT_TAGSIZE)) - #define FDT_CHECK_HEADER(fdt) \ { \ int err; \ -- cgit