diff options
| author | Wang Nan <wangnan0@huawei.com> | 2014-03-25 12:09:43 +0800 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2014-03-28 09:46:29 -0700 |
| commit | 685d033f80fc860d27ac7627c029a3e483315d45 (patch) | |
| tree | 6d903bc1f56aa816bb7257fd5e8f821b23730ca7 /kexec/libfdt | |
| parent | 0d526445f3d3f26f50e674d75ceee344c31369f1 (diff) | |
| download | kexec-tools-685d033f80fc860d27ac7627c029a3e483315d45.tar.gz | |
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 <wangnan0@huawei.com>
Acked-by: Dave Young <dyoung@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'kexec/libfdt')
| -rw-r--r-- | kexec/libfdt/libfdt.h | 24 | ||||
| -rw-r--r-- | 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 <fdt.h> -#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; \ |