[apple/xnu.git] / osfmk / console / ppc / video_scroll.s

/*
 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * @OSF_FREE_COPYRIGHT@
 * 
 */

/* Routines to perform high-speed scrolling, assuming that the memory is
 * non-cached, and that the amount of memory to be scrolled is a multiple
 * of (at least) 16.
 */

#include <ppc/asm.h>
#include <ppc/proc_reg.h>

/*
 * void video_scroll_up(unsigned long start,
 *		        unsigned long end,
 *		        unsigned long dest)
 */

ENTRY(video_scroll_up, TAG_NO_FRAME_USED)

			mfmsr	r0									/* Get the MSR */
			mflr	r6									/* Get the LR */
			ori		r7,r0,1<<(31-MSR_FP_BIT)			/* Turn on floating point */
			stwu	r1,-(FM_SIZE+16)(r1)				/* Get space for a couple of registers on stack */
			rlwinm	r7,r7,0,MSR_EE_BIT+1,MSR_EE_BIT-1	/* Turn off interrupts */
			stw		r6,(FM_SIZE+16+FM_LR_SAVE)(r1)		/* Save the return */
			
			mtmsr	r7									/* Turn on FPU */
			isync										/* Wait for it */
			
vsufpuon1:	stfd	f0,(FM_SIZE+0)(r1)					/* Save one register */
			stfd	f1,(FM_SIZE+8)(r1)					/* and the second */

/* ok, now we can use the FPU registers to do some fast copying
 */

.L_vscr_up_loop:
			lfd	f0,	0(r3)
			lfd	f1,	8(r3)
		
			addi	r3,	r3,	16
			
			stfd	f0,	0(r5)
		
			cmpl	cr0,	r3,	r4
		
			stfd	f1,	8(r5)
		
			addi	r5,	r5,	16
		
			blt+	cr0,	.L_vscr_up_loop

			lfd		f0,(FM_SIZE+0)(r1)					/* Load back one register */
			lfd		f1,(FM_SIZE+8)(r1)					/* and the second */
			lwz		r1,0(r1)							/* Pop the stack */
		
			mtmsr	r0									/* Turn off FPU again */
			isync										/* Wait for it */
			blr											/* Go away, don't bother me... */


/*
 * void video_scroll_down(unsigned long start,   HIGH address to scroll from
 *		          unsigned long end,     LOW address 
 *		          unsigned long dest)    HIGH address
 */

ENTRY(video_scroll_down, TAG_NO_FRAME_USED)

	/* Save off the link register, we want to call fpu_save.
	 */
	

			mfmsr	r0									/* Get the MSR */
			mflr	r6									/* Get the LR */
			ori		r7,r0,1<<(31-MSR_FP_BIT)			/* Turn on floating point */
			stwu	r1,-(FM_SIZE+16)(r1)				/* Get space for a couple of registers on stack */
			rlwinm	r7,r7,0,MSR_EE_BIT+1,MSR_EE_BIT-1	/* Turn off interrupts */
			stw		r6,(FM_SIZE+16+FM_LR_SAVE)(r1)		/* Save the return */
			
			mtmsr	r7									/* Turn on FPU */
			isync										/* Wait for it */
			
vsdfpuon1:	stfd	f0,(FM_SIZE+0)(r1)					/* Save one register */
			stfd	f1,(FM_SIZE+8)(r1)					/* and the second */

/* ok, now we can use the FPU registers to do some fast copying	 */

.L_vscr_down_loop:
			lfd	f0,	-16(r3)
			lfd	f1,	-8(r3)
		
			subi	r3,	r3,	16
			
			stfd	f0,	-16(r5)
		
			cmpl	cr0,	r3,	r4
		
			stfd	f1,	-8(r5)
		
			subi	r5,	r5,	16
		
			bgt+	cr0,	.L_vscr_down_loop
		

			lfd		f0,(FM_SIZE+0)(r1)					/* Load back one register */
			lfd		f1,(FM_SIZE+8)(r1)					/* and the second */
			lwz		r1,0(r1)							/* Pop the stack */
		
			mtmsr	r0									/* Turn off FPU again */
			isync										/* Wait for it */
			blr											/* Go away, don't bother me... */
Commit	Line	Data
1c79356b A	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
8f6c56a5	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
8f6c56a5 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
	14	*
	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
8ad349bb	24	* limitations under the License.
8f6c56a5 A	25	*
8f6c56a5 A	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* @OSF_FREE_COPYRIGHT@
	30	*
	31	*/
	32
	33	/* Routines to perform high-speed scrolling, assuming that the memory is
	34	* non-cached, and that the amount of memory to be scrolled is a multiple
	35	* of (at least) 16.
	36	*/
	37
	38	#include <ppc/asm.h>
	39	#include <ppc/proc_reg.h>
	40
	41	/*
	42	* void video_scroll_up(unsigned long start,
	43	* unsigned long end,
	44	* unsigned long dest)
	45	*/
	46
	47	ENTRY(video_scroll_up, TAG_NO_FRAME_USED)
	48
de355530	49	mfmsr r0 /* Get the MSR */
de355530 A	50	mflr r6 /* Get the LR */
	51	ori r7,r0,1<<(31-MSR_FP_BIT) /* Turn on floating point */
	52	stwu r1,-(FM_SIZE+16)(r1) /* Get space for a couple of registers on stack */
	53	rlwinm r7,r7,0,MSR_EE_BIT+1,MSR_EE_BIT-1 /* Turn off interrupts */
	54	stw r6,(FM_SIZE+16+FM_LR_SAVE)(r1) /* Save the return */
1c79356b	55
de355530 A	56	mtmsr r7 /* Turn on FPU */
de355530 A	57	isync /* Wait for it */
1c79356b	58
de355530 A	59	vsufpuon1: stfd f0,(FM_SIZE+0)(r1) /* Save one register */
de355530 A	60	stfd f1,(FM_SIZE+8)(r1) /* and the second */
1c79356b A	61
	62	/* ok, now we can use the FPU registers to do some fast copying
	63	*/
	64
	65	.L_vscr_up_loop:
	66	lfd f0, 0(r3)
	67	lfd f1, 8(r3)
	68
	69	addi r3, r3, 16
	70
	71	stfd f0, 0(r5)
	72
	73	cmpl cr0, r3, r4
	74
	75	stfd f1, 8(r5)
	76
	77	addi r5, r5, 16
	78
	79	blt+ cr0, .L_vscr_up_loop
	80
	81	lfd f0,(FM_SIZE+0)(r1) /* Load back one register */
	82	lfd f1,(FM_SIZE+8)(r1) /* and the second */
	83	lwz r1,0(r1) /* Pop the stack */
	84
	85	mtmsr r0 /* Turn off FPU again */
	86	isync /* Wait for it */
	87	blr /* Go away, don't bother me... */
	88
	89
	90	/*
	91	* void video_scroll_down(unsigned long start, HIGH address to scroll from
	92	* unsigned long end, LOW address
	93	* unsigned long dest) HIGH address
	94	*/
	95
	96	ENTRY(video_scroll_down, TAG_NO_FRAME_USED)
	97
	98	/* Save off the link register, we want to call fpu_save.
	99	*/
	100
	101
de355530	102	mfmsr r0 /* Get the MSR */
de355530 A	103	mflr r6 /* Get the LR */
	104	ori r7,r0,1<<(31-MSR_FP_BIT) /* Turn on floating point */
	105	stwu r1,-(FM_SIZE+16)(r1) /* Get space for a couple of registers on stack */
	106	rlwinm r7,r7,0,MSR_EE_BIT+1,MSR_EE_BIT-1 /* Turn off interrupts */
	107	stw r6,(FM_SIZE+16+FM_LR_SAVE)(r1) /* Save the return */
1c79356b	108
de355530 A	109	mtmsr r7 /* Turn on FPU */
de355530 A	110	isync /* Wait for it */
1c79356b	111
de355530 A	112	vsdfpuon1: stfd f0,(FM_SIZE+0)(r1) /* Save one register */
de355530 A	113	stfd f1,(FM_SIZE+8)(r1) /* and the second */
1c79356b A	114
	115	/* ok, now we can use the FPU registers to do some fast copying */
	116
	117	.L_vscr_down_loop:
	118	lfd f0, -16(r3)
	119	lfd f1, -8(r3)
	120
	121	subi r3, r3, 16
	122
	123	stfd f0, -16(r5)
	124
	125	cmpl cr0, r3, r4
	126
	127	stfd f1, -8(r5)
	128
	129	subi r5, r5, 16
	130
	131	bgt+ cr0, .L_vscr_down_loop
	132
	133
	134	lfd f0,(FM_SIZE+0)(r1) /* Load back one register */
	135	lfd f1,(FM_SIZE+8)(r1) /* and the second */
	136	lwz r1,0(r1) /* Pop the stack */
	137
	138	mtmsr r0 /* Turn off FPU again */
	139	isync /* Wait for it */
	140	blr /* Go away, don't bother me... */
	141