/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* The contents of this file constitute Original Code as defined in and
* are subject to the Apple Public Source License Version 1.1 (the
* "License"). You may not use this file except in compliance with the
* License. Please obtain a copy of the License at
* http://www.apple.com/publicsource and read it before using this file.
*
* This Original Code and all software distributed under the License are
* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
* License for the specific language governing rights and limitations
* under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <ppc/asm.h>
#include <ppc/proc_reg.h>
#include <cpus.h>
#include <assym.s>
#include <debug.h>
#include <mach/ppc/vm_param.h>
#include <ppc/exception.h>
/*
* The compiler generates calls to this function and passes address
* of caller of the function [ from which mcount is called ] as the
* first parameter.
* mcount disables interrupts prior to call mcount() and restores
* interrupt upon return.
* To prevent recursive calls to mcount(), a flag, mcountOff, is set
* in cpu_flags per_proc.
*/
.align 4
.globl mcount
mcount:
mflr r0 stwu r1,-64(r1) rlwinm r9,r9,0,MSR_FP_BIT+1,MSR_FP_BIT-1 rlwinm r8,r9,0,MSR_EE_BIT+1,MSR_EE_BIT-1 isync
mfsprg r7,0 ori r5,r6,mcountOff beq mcount_ret stw r9,FM_ARG0(r1) bl _mcount mfsprg r7,0 li r5,mcountOff sth r6,PP_CPU_FLAGS(r7) addi r1,r1,64
mtmsr r9 mtlr r0
blr