getintmask.s
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/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include <asm.h>
#include <regdef.h>
#include <R4300.h>
#include <rcp.h>
#include <os.h>
#include "threadasm.h"
.set noreorder
LEAF(osGetIntMask)
mfc0 v0,C0_SR
andi v0,(SR_IMASK|SR_IE)
la t0, __OSGlobalIntMask # get global interrupt mask
lw t1, 0(t0)
xor t0, t1, 0xffffffff
andi t0, SR_IMASK
or v0, t0 # subtract __OSGlobalIntMask
lw t1,PHYS_TO_K1(MI_INTR_MASK_REG) # get rcp interrupt register
beqz t1, 1f
la t0, __OSGlobalIntMask # get global interrupt mask
lw t0, 0(t0)
srl t0, RCP_IMASKSHIFT
xor t0, 0xffffffff
and t0, 0x3f
#lw k0,__osRunningThread
#lw t4, T_CONTEXT_RCP(k0)
#and t0, t4
or t1, t0 #subtract __OSGlobalIntMask
1:
sll t2, t1, RCP_IMASKSHIFT
or v0, t2
j ra
nop
END(osGetIntMask)