[PATCH 12/13] cbfs: Allow reading a file from a CBFS given its base addr

[Bin Meng]

Hi Simon,

On Wed, May 13, 2020 at 10:24 PM Simon Glass <sjg at chromium.org> wrote:
>
> Currently we support reading a file from CBFS given the address of the end
> of the ROM. Sometimes we only know the start of the CBFS. Add a function
> to find a file given that.
>
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
>
>  fs/cbfs/cbfs.c | 13 +++++++++++++
>  include/cbfs.h | 11 +++++++++++
>  2 files changed, 24 insertions(+)
>
> diff --git a/fs/cbfs/cbfs.c b/fs/cbfs/cbfs.c
> index 76613fa871..1603409a8f 100644
> --- a/fs/cbfs/cbfs.c
> +++ b/fs/cbfs/cbfs.c
> @@ -413,6 +413,19 @@ int file_cbfs_find_uncached(ulong end_of_rom, const char *name,
>         return find_uncached(&priv, name, start, node);
>  }
>
> +int file_cbfs_find_uncached_base(ulong base, const char *name,
> +                                struct cbfs_cachenode *node)
> +{
> +       struct cbfs_priv priv;
> +       int ret;
> +
> +       ret = cbfs_load_header_ptr(&priv, base);
> +       if (ret)
> +               return ret;
> +
> +       return find_uncached(&priv, name, (u8 *)base, node);

(void *)base

> +}
> +
>  const char *file_cbfs_name(const struct cbfs_cachenode *file)
>  {
>         cbfs_s.result = CBFS_SUCCESS;
> diff --git a/include/cbfs.h b/include/cbfs.h
> index 4dd3c0795d..b1a8d2cad2 100644
> --- a/include/cbfs.h
> +++ b/include/cbfs.h
> @@ -173,6 +173,17 @@ int cbfs_init_mem(ulong base, ulong size, struct cbfs_priv **privp);
>  int file_cbfs_find_uncached(ulong end_of_rom, const char *name,
>                             struct cbfs_cachenode *node);
>
> +/**
> + * file_cbfs_find_uncached() - Find a file in CBFS without using the heap

file_cbfs_find_uncached_base(), and the description is wrong

> + *
> + * @base: Points to the base of the CBFS
> + * @name: The name to search for
> + * @node: Returns the node if found
> + * @return 0 on success, -ENOENT if not found, -EFAULT on bad header
> + */
> +int file_cbfs_find_uncached_base(ulong base, const char *name,
> +                                struct cbfs_cachenode *node);
> +
>  /**
>   * file_cbfs_name() - Get the name of a file in CBFS.
>   *

Regards,
Bin