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Coalesced writes on xscale systems do not always work. If 

XSCALE_NO_COALESCE_WRITES is set, disable.  Otherwise, enable.
This commit is contained in:
briggs 2002-08-20 02:30:51 +00:00
parent 50e0ea7aa2
commit 88452ee2b5
1 changed files with 5 additions and 1 deletions
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6
sys/arch/arm/arm/cpufunc.c
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@ -1,4 +1,4 @@
/* $NetBSD: cpufunc.c,v 1.53 2002/08/20 02:00:46 briggs Exp $ */
/* $NetBSD: cpufunc.c,v 1.54 2002/08/20 02:30:51 briggs Exp $ */
/*
* arm7tdmi support code Copyright (c) 2001 John Fremlin
@ -1947,7 +1947,11 @@ xscale_setup(args)
/* Make sure write coalescing is turned on */
__asm __volatile("mrc p15, 0, %0, c1, c0, 1"
: "=r" (auxctl));
#if XSCALE_NO_COALESCE_WRITES
auxctl |= XSCALE_AUXCTL_K;
#else
auxctl &= ~XSCALE_AUXCTL_K;
#endif
__asm __volatile("mcr p15, 0, %0, c1, c0, 1"
: : "r" (auxctl));
}