/*
* This file contains miscellaneous low-level functions.
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
*
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
* and Paul Mackerras.
*
* kexec bits:
* Copyright (C) 2002-2003 Eric Biederman <ebiederm@xmission.com>
* GameCube/ppc32 port Copyright (C) 2004 Albert Herranz
* PPC44x port. Copyright (C) 2011, IBM Corporation
* Author: Suzuki Poulose <suzuki@in.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 <linux/sys.h>
#include <asm/unistd.h>
#include <asm/errno.h>
#include <asm/reg.h>
#include <asm/page.h>
#include <asm/cache.h>
#include <asm/cputable.h>
#include <asm/mmu.h>
#include <asm/ppc_asm.h>
#include <asm/thread_info.h>
#include <asm/asm-offsets.h>
#include <asm/processor.h>
#include <asm/kexec.h>
#include <asm/bug.h>
#include <asm/ptrace.h>
.text
/*
* We store the saved ksp_limit in the unused part
* of the STACK_FRAME_OVERHEAD
*/
_GLOBAL(call_do_softirq)
mflr r0
stw r0,4(r1)
lwz r10,THREAD+KSP_LIMIT(r2)
addi r11,r3,THREAD_INFO_GAP
stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r3)
mr r1,r3
stw r10,8(r1)
stw r11,THREAD+KSP_LIMIT(r2)
bl __do_softirq
lwz r10,8(r1)
lwz r1,0(r1)
lwz r0,4(r1)
stw r10,THREAD+KSP_LIMIT(r2)
mtlr r0
blr
/*
* void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp);
*/
_GLOBAL(call_do_irq)
mflr r0
stw r0,4(r1)
lwz r10,THREAD+KSP_LIMIT(r2)
addi r11,r4,THREAD_INFO_GAP
stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r4)
mr r1,r4
stw r10,8(r1)
stw r11,THREAD+KSP_LIMIT(r2)
bl __do_irq
lwz r10,8(r1)
lwz r1,0(r1)
lwz r0,4(r1)
stw r10,THREAD+KSP_LIMIT(r2)
mtlr r0
blr
/*
* This returns the high 64 bits of the product of two 64-bit numbers.
*/
_GLOBAL(mulhdu)
cmpwi r6,0
cmpwi cr1,r3,0<
