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Use wrteei to disable interrupts; easier assembly and saves a temporary 

variable.
This commit is contained in:
simonb 2003-07-14 13:02:13 +00:00
parent 0d42503562
commit 96df404b38
1 changed files with 4 additions and 5 deletions
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9
sys/arch/evbppc/walnut/machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: machdep.c,v 1.12 2003/07/14 12:59:36 simonb Exp $ */
/* $NetBSD: machdep.c,v 1.13 2003/07/14 13:02:13 simonb Exp $ */
/*
* Copyright 2001, 2002 Wasabi Systems, Inc.
@ -339,19 +339,18 @@ install_extint(void (*handler)(void))
extern int extint, extsize;
extern u_long extint_call;
u_long offset = (u_long)handler - (u_long)&extint_call;
int omsr, msr;
int msr;
#ifdef DIAGNOSTIC
if (offset > 0x1ffffff)
panic("install_extint: too far away");
#endif
asm volatile ("mfmsr %0; andi. %1,%0,%2; mtmsr %1"
: "=r"(omsr), "=r"(msr) : "K"((u_short)~PSL_EE));
asm volatile ("mfmsr %0; wrteei 0" : "=r"(msr));
extint_call = (extint_call & 0xfc000003) | offset;
memcpy((void *)EXC_EXI, &extint, (size_t)&extsize);
__syncicache((void *)&extint_call, sizeof extint_call);
__syncicache((void *)EXC_EXI, (int)&extsize);
asm volatile ("mtmsr %0" :: "r"(omsr));
asm volatile ("mtmsr %0" :: "r"(msr));
}
/*