[PATCH 4/6] cmdline: Add cmdline support

[Andreas Kölbl]

Am 02.08.2017 um 15:54 schrieb Sebastian Huber:
> On 01/08/17 22:14, Andreas Kölbl wrote:
> 
>> At the moment I didn't implement smp functionality. I will implement it
>> directly after implementing SMP.
> 
> You can use arm_cortex_a9_get_multiprocessor_cpu_id() in all
> configurations.
> 
> Please try to use the functions in <libcpu/arm-cp15.h> in your BSP. If
> missing, then add them.
> 
I've tried this approach. The cortex-a15 manual states:

"CPU ID	
Indicates the processor number in a Cortex-A15 multiprocessor system. For:
one processor, the CPU ID is 0x0 [1]."

In the Jailhouse single processor configuration this method does not work.

[1]
http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0438d/BABCBFDF.html
>>
>> Am 01.08.2017 um 13:08 schrieb Sebastian Huber:
>>> Why can't you use_CPU_SMP_Get_current_processor() instead of
>>> bsp_get_boot_cpu().
>>>
>>> Why do you have to use the linker command file to allocate memory for
>>> the command line?
>>>
>> I thought, it would be a good idea to reserve memory for it on a defined
>> place. This should ensure that a misconfiguration leads to an error.
> 
> Who defines the memory location for the command line? Is this read-only
> memory?
>