Re: [POWERPC] convert string i/o operations to C
From: Michael Ellerman <hidden>
Date: 2006-09-20 04:38:27
On Wed, 2006-09-20 at 13:35 +1000, Stephen Rothwell wrote:
This produces essentially the same code and will make the iSeries i/o consolidation easier.
A bit more white space would be nice :D, eg:
+void _insb(volatile u8 __iomem *port, void *buf, long count)
+{
+ u8 *tbuf = buf;
+ u8 tmp;
+
+ if (unlikely(count <= 0))
+ return;+ asm volatile("sync");+ do {
+ tmp = *port;
+ asm volatile("eieio");
+ *tbuf++ = tmp;
+ } while (--count != 0);+ asm volatile("twi 0,%0,0; isync" : : "r" (tmp));
+}
+EXPORT_SYMBOL(_insb);cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person
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