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