56 lines
1.4 KiB
ArmAsm
56 lines
1.4 KiB
ArmAsm
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/*
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* This file contains miscellaneous low-level functions.
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* Copyright (C) 1995-2005 IBM Corp
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*
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras.
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* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
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* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/processor.h>
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#include <asm/asm-offsets.h>
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.text
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/* unsigned long local_save_flags(void) */
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_GLOBAL(local_get_flags)
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lbz r3,PACAPROCENABLED(r13)
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blr
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/* unsigned long local_irq_disable(void) */
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_GLOBAL(local_irq_disable)
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lbz r3,PACAPROCENABLED(r13)
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li r4,0
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stb r4,PACAPROCENABLED(r13)
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blr /* Done */
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/* void local_irq_restore(unsigned long flags) */
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_GLOBAL(local_irq_restore)
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lbz r5,PACAPROCENABLED(r13)
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/* Check if things are setup the way we want _already_. */
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cmpw 0,r3,r5
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beqlr
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/* are we enabling interrupts? */
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cmpdi 0,r3,0
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stb r3,PACAPROCENABLED(r13)
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beqlr
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/* Check pending interrupts */
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/* A decrementer, IPI or PMC interrupt may have occurred
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* while we were in the hypervisor (which enables) */
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ld r4,PACALPPACA+LPPACAANYINT(r13)
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cmpdi r4,0
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beqlr
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/*
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* Handle pending interrupts in interrupt context
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*/
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li r0,0x5555
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sc
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blr
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