This is the mail archive of the ecos-discuss@sources.redhat.com mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: ARM arch: unknown asm insn "mrc" in v5T_semantics()


>>>>> Heiko Panther writes:

> I'm targetting an ARM7 TDMI processor, and gcc 3.3.2 complains about 
> this inline asm instruction from function arm_stub.h:v5T_semantics().

>      asm volatile ("mrc  p15,0,%0,c0,c0,0\n"
> 		  : "=r" (id) : /* no inputs */);

> What's up with this insn, I can't find it in the reference. And what 
> should I correct to make it work?

Which reference? It is covered in the ARM Architectural Reference Manual.
The instruction reads the CPU ID register and is valid for all ARM cpus.

--Mark



-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]