[apple/xnu.git] / osfmk / ppc / Performance.s

/*
 * 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@
 */
/*
 * @OSF_COPYRIGHT_INTERNAL_USE_ONLY@
 */

/* 																							
 	Performance.s 

	Handle things that should are related to the hardware performance monitor

	Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials.
	No more than 7500 chinchillas were killed in the production of the code.

*/

#include <ppc/asm.h>
#include <ppc/proc_reg.h>
#include <ppc/exception.h>
#include <ppc/Performance.h>
#include <mach/machine/vm_param.h>
#include <assym.s>

#if PERF_HIST
/*
 *			This routine is used to interface to the performance monitor
 */

ENTRY(PerfCtl, TAG_NO_FRAME_USED)

			lis		r0,PerfCtlCall@h				/* Get the top part of the SC number */
			ori		r0,r0,PerfCtlCall@l				/* and the bottom part */
			sc										/* Do it to it */
			blr										/* Bye bye, Birdie... */
			

ENTRY(PerfCtlLL, TAG_NO_FRAME_USED)

			cmplwi	r3,maxPerf						/* See if we are within range */
			mflr	r11								/* Get the return point */
			li		r3,0							/* Show failure */
			bgelrl-									/* Load up current address and, also, leave if out of range */
prfBase:	mflr	r12								/* Get our address */
			rlwinm	r10,r3,2,0,31					/* Get displacement into branch table */
			addi	r12,r12,prfBrnch-prfBase		/* Point to the branch address */
			add		r12,r12,r10						/* Point to the branch */
			mtlr	r12								/* Get it in the link register */
			blr										/* Vector to the specific performance command... */
			
prfBrnch:	b		prfClear						/* Clear the histogram table */
			b		prfStart						/* Start the performance monitor */
			b		prfStop							/* Stop the performance monitor */
			b		prfMap							/* Map the histogram into an address space */
			.equ	maxPerf, (.-prfBrnch)/4			/* Set the highest valid address */
			
/*
 *			Clear the monitor histogram
 */
prfClear:
 			li		r4,PMIhist@l					/* We know this to be in page 0, so no need for the high part */
			lis		r8,PMIHIST_SIZE@h				/* Get high half of the table size */
			lwz		r4,0(r4)						/* Get the real address of the histgram */
			ori		r8,r8,PMIHIST_SIZE@l			/* Get the low half of the table size */
			li		r6,32							/* Get a displacement */
			li		r3,1							/* Set up a good return code */
			mtlr	r11								/* Restore the return address */
						
clrloop:	subi	r8,r8,32						/* Back off a cache line */
			dcbz	0,r4							/* Do the even line */
			sub.	r8,r8,r6						/* Back off a second time (we only do this to generate a CR */
			dcbz	r6,r4							/* Clear the even line */
			addi	r4,r4,64						/* Move up to every other line */
			bgt+	clrloop							/* Go until we've done it all... */

			blr										/* Leave... */
			
/*
 *			Start the monitor histogram
 */
 prfStart:
 			mtlr	r11								/* Restore the return address */
			blr										/* Return... */
			
/*
 *			Stop the monitor histogram
 */
 prfStop:
 			mtlr	r11								/* Restore the return address */
			blr										/* Return... */
			
/*
 *			Maps the monitor histogram into another address space
 */
 prfMap:
 			mtlr	r11								/* Restore the return address */
			blr										/* Return... */

#endif
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
37839358 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
37839358 A	12	* This Original Code and all software distributed under the License are
37839358 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
37839358 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* @OSF_COPYRIGHT_INTERNAL_USE_ONLY@
	24	*/
	25
	26	/*
	27	Performance.s
	28
	29	Handle things that should are related to the hardware performance monitor
	30
	31	Lovingly crafted by Bill Angell using traditional methods and only natural or recycled materials.
	32	No more than 7500 chinchillas were killed in the production of the code.
	33
	34	*/
	35
	36	#include <ppc/asm.h>
	37	#include <ppc/proc_reg.h>
1c79356b A	38	#include <ppc/exception.h>
	39	#include <ppc/Performance.h>
	40	#include <mach/machine/vm_param.h>
	41	#include <assym.s>
	42
	43	#if PERF_HIST
	44	/*
	45	* This routine is used to interface to the performance monitor
	46	*/
	47
	48	ENTRY(PerfCtl, TAG_NO_FRAME_USED)
	49
	50	lis r0,PerfCtlCall@h /* Get the top part of the SC number */
	51	ori r0,r0,PerfCtlCall@l /* and the bottom part */
	52	sc /* Do it to it */
	53	blr /* Bye bye, Birdie... */
	54
	55
	56	ENTRY(PerfCtlLL, TAG_NO_FRAME_USED)
	57
	58	cmplwi r3,maxPerf /* See if we are within range */
	59	mflr r11 /* Get the return point */
	60	li r3,0 /* Show failure */
	61	bgelrl- /* Load up current address and, also, leave if out of range */
	62	prfBase: mflr r12 /* Get our address */
	63	rlwinm r10,r3,2,0,31 /* Get displacement into branch table */
	64	addi r12,r12,prfBrnch-prfBase /* Point to the branch address */
	65	add r12,r12,r10 /* Point to the branch */
	66	mtlr r12 /* Get it in the link register */
	67	blr /* Vector to the specific performance command... */
	68
	69	prfBrnch: b prfClear /* Clear the histogram table */
	70	b prfStart /* Start the performance monitor */
	71	b prfStop /* Stop the performance monitor */
	72	b prfMap /* Map the histogram into an address space */
	73	.equ maxPerf, (.-prfBrnch)/4 /* Set the highest valid address */
	74
	75	/*
	76	* Clear the monitor histogram
	77	*/
	78	prfClear:
	79	li r4,PMIhist@l /* We know this to be in page 0, so no need for the high part */
	80	lis r8,PMIHIST_SIZE@h /* Get high half of the table size */
	81	lwz r4,0(r4) /* Get the real address of the histgram */
	82	ori r8,r8,PMIHIST_SIZE@l /* Get the low half of the table size */
	83	li r6,32 /* Get a displacement */
	84	li r3,1 /* Set up a good return code */
	85	mtlr r11 /* Restore the return address */
	86
	87	clrloop: subi r8,r8,32 /* Back off a cache line */
	88	dcbz 0,r4 /* Do the even line */
	89	sub. r8,r8,r6 /* Back off a second time (we only do this to generate a CR */
	90	dcbz r6,r4 /* Clear the even line */
	91	addi r4,r4,64 /* Move up to every other line */
	92	bgt+ clrloop /* Go until we've done it all... */
	93
	94	blr /* Leave... */
	95
	96	/*
	97	* Start the monitor histogram
	98	*/
	99	prfStart:
	100	mtlr r11 /* Restore the return address */
	101	blr /* Return... */
102
103	/*
104	* Stop the monitor histogram
105	*/
106	prfStop:
107	mtlr r11 /* Restore the return address */
108	blr /* Return... */
109
110	/*
111	* Maps the monitor histogram into another address space
112	*/
113	prfMap:
114	mtlr r11 /* Restore the return address */
115	blr /* Return... */
116
117	#endif
118