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Date: Sun, 20 Mar 2011 09:26:29 +0000 From: Russell King - ARM Linux <linux@....linux.org.uk> To: Stephen Boyd <sboyd@...eaurora.org> Cc: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, Tony Lindgren <tony@...mide.com> Subject: Re: [PATCH] ARM: Merge v6 and v7 DEBUG_LL DCC support On Thu, Mar 17, 2011 at 07:52:00PM -0700, Stephen Boyd wrote: > The inline assembly differences for v6 vs. v7 are purely > optimizations. On a v7 processor, an mrc with the pc sets the > condition codes to the 28-31 bits of the register being read. It > just so happens that the TX/RX full bits the DCC support code is > testing for are high enough in the register to be put into the > condition codes. On a v6 processor, this "feature" isn't > implemented and thus we have to do the usual read, mask, test > operations to check for TX/RX full. Thus, we can drop the v7 > implementation and just use the v6 implementation for both. This patch needs updating for the changes that were in my tree for many months, and are now in mainline. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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