diff options
| author | Simon Glass | 2023-11-12 08:27:46 -0700 |
|---|---|---|
| committer | Tom Rini | 2023-12-13 18:39:05 -0500 |
| commit | 451c1ab6b07b677ef10d36af5c63a7d764ea8ba2 (patch) | |
| tree | 86b50963bc7322b030b4ef5f1ca65ede4babe3df | |
| parent | 9578dd856a72b0412fa65480d8e3c76a52a6cba1 (diff) | |
fdt: Improve the comment for fdt_shrink_to_minimum()
Add a bit more detail about what this function does.
Signed-off-by: Simon Glass <sjg@chromium.org>
| -rw-r--r-- | boot/fdt_support.c | 1 | ||||
| -rw-r--r-- | include/fdt_support.h | 12 |
2 files changed, 11 insertions, 2 deletions
diff --git a/boot/fdt_support.c b/boot/fdt_support.c index b15d07765fe..090d82ee80a 100644 --- a/boot/fdt_support.c +++ b/boot/fdt_support.c @@ -667,7 +667,6 @@ int fdt_record_loadable(void *blob, u32 index, const char *name, return node; } -/* Resize the fdt to its actual size + a bit of padding */ int fdt_shrink_to_minimum(void *blob, uint extrasize) { int i; diff --git a/include/fdt_support.h b/include/fdt_support.h index feda0d99740..0601f5f7dc8 100644 --- a/include/fdt_support.h +++ b/include/fdt_support.h @@ -232,13 +232,23 @@ int ft_system_setup(void *blob, struct bd_info *bd); void set_working_fdt_addr(ulong addr); /** - * shrink down the given blob to minimum size + some extrasize if required + * fdt_shrink_to_minimum() - shrink FDT while allowing for some margin + * + * Shrink down the given blob to 'minimum' size + some extrasize. + * + * The new size is enough to hold the existing contents plus @extrasize bytes, + * plus 5 memory reservations. Also, the end of the FDT is aligned to a 4KB + * boundary, so it might end up up to 4KB larger than needed. + * + * If there is an existing memory reservation for @blob in the FDT, it is + * updated for the new size. * * @param blob FDT blob to update * @param extrasize additional bytes needed * Return: 0 if ok, or -FDT_ERR_... on error */ int fdt_shrink_to_minimum(void *blob, uint extrasize); + int fdt_increase_size(void *fdt, int add_len); int fdt_delete_disabled_nodes(void *blob); |