[U-Boot] [PATCH v3 2/8] SPL: Port SPL framework to powerpc

[Stefan Roese <sr@denx.de>]

On 09/29/2012 01:13 AM, Scott Wood wrote:
> On 09/26/2012 04:01:08 AM, Stefan Roese wrote:
>> This patch enables the SPL framework to be used on powerpc platforms
>> and not only ARM.
>>
>> Signed-off-by: Stefan Roese <sr@denx.de>
>> ---
>> Changes in v2:
>> - Rebased on Tom's SPL framework patches v4
>> - Add option to skip copying of the mkimage header
>>
>>  arch/powerpc/lib/Makefile |  1 +
>>  arch/powerpc/lib/spl.c    | 42  
>> ++++++++++++++++++++++++++++++++++++++++++
>>  common/spl/spl.c          | 10 ++++++++++
>>  3 files changed, 53 insertions(+)
>>  create mode 100644 arch/powerpc/lib/spl.c
>>
>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>> index 965f9ea..9bcbdde 100644
>> --- a/arch/powerpc/lib/Makefile
>> +++ b/arch/powerpc/lib/Makefile
>> @@ -50,6 +50,7 @@ COBJS-y	+= cache.o
>>  COBJS-y	+= extable.o
>>  COBJS-y	+= interrupts.o
>>  COBJS-$(CONFIG_CMD_KGDB) += kgdb.o
>> +COBJS-$(CONFIG_SPL_FRAMEWORK) += spl.o
>>  COBJS-y	+= time.o
> 
> Won't this build spl.o into the main U-Boot as well?

Yes. I'll fix it in the next patchset version.

>> +/*
>> + * This function jumps to an image with argument. Normally an FDT or  
>> ATAGS
>> + * image.
>> + * arg: Pointer to paramter image in RAM
>> + */
>> +#ifdef CONFIG_SPL_OS_BOOT
>> +void __noreturn jump_to_image_linux(void *arg)
>> +{
>> +	debug("Entering kernel arg pointer: 0x%p\n", arg);
>> +	typedef void (*image_entry_arg_t)(void *, ulong r4, ulong r5,  
>> ulong r6,
>> +					  ulong r7, ulong r8, ulong r9)
>> +		__attribute__ ((noreturn));
>> +	image_entry_arg_t image_entry =
>> +		(image_entry_arg_t)spl_image.entry_point;
>> +
>> +	image_entry(arg, 0, 0, EPAPR_MAGIC, CONFIG_SYS_BOOTMAPSZ, 0, 0);
>> +}
> 
> At what point does the image get cache-flushed?

Not at all right now. MPC5200 has dcache disabled, at least in the SPL.
Other PowerPC architectures might add a cache flush here if needed at
some time. Okay?

Thanks,
Stefan