[SeaBIOS] [PATCH 1/8] Add "romfile" code to assist with extract integer config settings.

[Wayne Xia]

     Hi, I tried the patch 1 and 2, and tested it with qemu passing
data, it seems good. thanks.

于 2011-7-6 9:08, Kevin O'Connor 写道:
> Add romfile_loadint() function which can be used to extract a
> little-endian binary encoded integer from rom.
> ---
>   src/paravirt.c |   19 +++++++++++++++++++
>   src/paravirt.h |    1 +
>   2 files changed, 20 insertions(+), 0 deletions(-)
>
> diff --git a/src/paravirt.c b/src/paravirt.c
> index 09e3d23..9cf77de 100644
> --- a/src/paravirt.c
> +++ b/src/paravirt.c
> @@ -409,3 +409,22 @@ romfile_loadfile(const char *name, int *psize)
>       data[filesize] = '\0';
>       return data;
>   }
> +
> +// Attempt to load an integer from the given file - return 'defval'
> +// if unsuccesful.
> +u64
> +romfile_loadint(const char *name, u64 defval)
> +{
> +    u32 file = romfile_find(name);
> +    if (!file)
> +        return defval;
> +
> +    int filesize = romfile_size(file);
> +    if (!filesize || filesize>  sizeof(u64) || (filesize&  (filesize-1)))
> +        // Doesn't look like a valid integer.
> +        return defval;
> +
> +    u64 val = 0;
> +    romfile_copy(file,&val, sizeof(val));
> +    return val;
> +}
> diff --git a/src/paravirt.h b/src/paravirt.h
> index 7bf34b1..83166f4 100644
> --- a/src/paravirt.h
> +++ b/src/paravirt.h
> @@ -101,6 +101,7 @@ static inline const char* romfile_name(u32 fileid) {
>       return qemu_cfg_name_file(fileid);
>   }
>   void *romfile_loadfile(const char *name, int *psize);
> +u64 romfile_loadint(const char *name, u64 defval);
>
>   u32 qemu_cfg_e820_entries(void);
>   void* qemu_cfg_e820_load_next(void *addr);


-- 
Best Regards

Wayne Xia
mail:xiawenc at linux.vnet.ibm.com
tel:86-010-82450803