[PATCH 3/3] ppc/uImage: Add support for RAM Disks

[McClintock Matthew-B29882]

On Sun, Jan 13, 2013 at 11:14 PM, Suzuki K. Poulose <suzuki at in.ibm.com> wrote:
> On 01/11/2013 12:41 PM, McClintock Matthew-B29882 wrote:
>>
>> On Fri, Jan 11, 2013 at 12:42 AM, Suzuki K. Poulose <suzuki at in.ibm.com>
>> wrote:
>>>
>>> From: Suzuki K. Poulose <suzuki at in.ibm.com>
>>>
>>> Handle the RAM Disks in uImage format
>>
>>
>> As opposed to simple ext2.gz ramdisk?

OK - it's been a while but we only supported uImage for kernel image
not ramdisk. That's what threw me off when I wrote this email I
believe.

-M

>
>
> Yep. Any supported ramdisk format can be wrapped up in a uImage file.
>
> Thanks
> Suzuki
>
>
>>
>> -M
>>
>>>
>>> Signed-off-by: Suzuki K. Poulose <suzuki at in.ibm.com>
>>> ---
>>>   kexec/arch/ppc/kexec-uImage-ppc.c |   22 +++++++++++++++++++++-
>>>   1 file changed, 21 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/kexec/arch/ppc/kexec-uImage-ppc.c
>>> b/kexec/arch/ppc/kexec-uImage-ppc.c
>>> index eaea3c1..58935c0 100644
>>> --- a/kexec/arch/ppc/kexec-uImage-ppc.c
>>> +++ b/kexec/arch/ppc/kexec-uImage-ppc.c
>>> @@ -46,6 +46,26 @@ void uImage_ppc_usage(void)
>>>          );
>>>   }
>>>
>>> +char* slurp_ramdisk_ppc(const char *filename, off_t *r_size)
>>> +{
>>> +       struct Image_info img;
>>> +       off_t size;
>>> +       const unsigned char *buf =
>>> +                       (const unsigned char *)slurp_file(filename,
>>> &size);
>>> +
>>> +       /* Check if this is a uImage RAMDisk */
>>> +       if (buf != (void*)0 &&
>>> +               uImage_probe(buf, size, IH_ARCH_PPC) == IH_TYPE_RAMDISK)
>>> {
>>> +               if (uImage_load(buf, size, &img) != 0)
>>> +                       die ("uImage: Reading %ld bytes from %s
>>> failed\n", size, filename);
>>> +               buf = img.buf;
>>> +               size = img.len;
>>> +       }
>>> +
>>> +       *r_size = size;
>>> +       return buf;
>>> +}
>>> +
>>>   int uImage_ppc_probe(const char *buf, off_t len)
>>>   {
>>>          int type;
>>> @@ -196,7 +216,7 @@ static int ppc_load_bare_bits(int argc, char **argv,
>>> const char *buf,
>>>          blob_buf = fixup_dtb_init(info, blob_buf, &blob_size, load_addr,
>>> &dtb_addr);
>>>
>>>          if (ramdisk) {
>>> -               seg_buf = slurp_file(ramdisk, &seg_size);
>>> +               seg_buf = slurp_ramdisk_ppc(ramdisk, &seg_size);
>>>                  /* Load ramdisk at top of memory */
>>>                  hole_addr = add_buffer(info, seg_buf, seg_size,
>>> seg_size,
>>>                                  0, dtb_addr + blob_size, max_addr, -1);
>>>
>>>
>>> _______________________________________________
>>> kexec mailing list
>>> kexec at lists.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/kexec
>>
>>
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>
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