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Reset the i80200 ICU and PMU to a pristine state very early.

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This commit is contained in:
thorpej 2001-12-01 23:06:45 +00:00
parent fa0a465c3f
commit 72dee19a8c
1 changed files with 26 additions and 1 deletions
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27
sys/arch/arm/arm/cpufunc.c
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@ -1,4 +1,4 @@
/* $NetBSD: cpufunc.c,v 1.21 2001/12/01 14:21:18 bjh21 Exp $ */
/* $NetBSD: cpufunc.c,v 1.22 2001/12/01 23:06:45 thorpej Exp $ */
/*
* arm7tdmi support code Copyright (c) 2001 John Fremlin
@ -870,6 +870,31 @@ set_cpufuncs()
#endif /* CPU_SA110 */
#ifdef CPU_XSCALE
if (cputype == CPU_ID_I80200) {
/*
* Reset the Interrupt Controller Unit to a pristine
* state:
* - all interrupt sources disabled
* - PMU/BCU sterred to IRQ
*/
__asm __volatile("mcr p13, 0, %0, c0, c0, 0"
:
: "r" (0));
__asm __volatile("mcr p13, 0, %0, c2, c0, 0"
:
: "r" (0));
/*
* Reset the Performance Monitoring Unit to a
* pristine state:
* - CCNT, PMN0, PMN1 reset to 0
* - overflow indications cleared
* - all counters disabled
*/
__asm __volatile("mcr p14, 0, %0, c0, c0, 0"
:
: "r" (PMNC_P|PMNC_C|PMNC_PMN0_IF|PMNC_PMN1_IF|
PMNC_CC_IF));
/*
* XXX Disable ECC in the Bus Controller Unit; we
* don't really support it, yet. Clear any pending