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Now treat the bus error register as 16-bits wide, even

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though it has nothing in the top half.  Reading it as
only 8 bits can sometimes give erroneous values.  Under
DEBUG, also stash the value read in the buserr_reg global,
since the value is only latched until read.
This commit is contained in:
fredette 2001-08-16 23:54:31 +00:00
parent 3a6e3c55cb
commit ba289d7421
1 changed files with 5 additions and 2 deletions
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7
sys/arch/sun2/sun2/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.7 2001/06/27 03:25:31 fredette Exp $ */
/* $NetBSD: locore.s,v 1.8 2001/08/16 23:54:31 fredette Exp $ */
/*
* Copyright (c) 2001 Matthew Fredette
@ -227,9 +227,12 @@ sun2_mmu_specific:
movc %sfc, %d1 | save sfc to d1
moveq #FC_CONTROL, %d0 | sfc = FC_CONTROL
movc %d0, %sfc
movsb BUSERR_REG, %d0 | get value of bus error register
movsw BUSERR_REG, %d0 | get value of bus error register
movc %d1, %sfc | restore sfc
movl %sp@+, %d1 | restore d1
#ifdef DEBUG
movw %d0, _C_LABEL(buserr_reg) | save bus error register value
#endif
andb #BUSERR_PROTERR, %d0 | is this an MMU (protection *or* page unavailable) fault?
jeq Lisberr | non-MMU bus error
/* End of sun2 specific code. */