On Wed, 2011-09-28 at 16:07 +0200, Arnd Bergmann wrote:
> On Tuesday 27 September 2011, Mark Salter wrote:
>
> > +
> > +static inline void __delay(unsigned long loops)
> > +{
> > + uint32_t tmp;
> > +
> > + /* 6 cycles per loop */
> > + asm volatile (" mv .s1 %0,%1\n"
> > + "0: [%1] b .s1 0b\n"
> > + " add .l1 -6,%0,%0\n"
> > + " cmplt .l1 1,%0,%1\n"
> > + " nop 3\n"
> > + : "+a"(loops), "=A"(tmp));
> > +}
> > +
> > +static inline void _c6x_tickdelay(unsigned int x)
> > +{
> > + uint32_t cnt, endcnt;
> > +
> > + asm volatile (" mvc .s2 TSCL,%0\n"
> > + " add .s2x %0,%1,%2\n"
> > + " || mvk .l2 1,B0\n"
> > + "0: [B0] b .s2 0b\n"
> > + " mvc .s2 TSCL,%0\n"
> > + " sub .s2 %0,%2,%0\n"
> > + " cmpgt .l2 0,%0,B0\n"
> > + " nop 2\n"
> > + : "=b"(cnt), "+a"(x), "=b"(endcnt) : : "B0");
> > +}
>
> Do you actually need to provide the __delay function here?
> I think it's really only used by the calibrate_delay() function
> that you don't need.
>
It is still used in spinlock_debug.c and a few drivers.
--Mark
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