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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /*
26: * Copyright 1996 1995 by Open Software Foundation, Inc. 1997 1996 1995 1994 1993 1992 1991
27: * All Rights Reserved
28: *
29: * Permission to use, copy, modify, and distribute this software and
30: * its documentation for any purpose and without fee is hereby granted,
31: * provided that the above copyright notice appears in all copies and
32: * that both the copyright notice and this permission notice appear in
33: * supporting documentation.
34: *
35: * OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
36: * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
37: * FOR A PARTICULAR PURPOSE.
38: *
39: * IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
40: * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
41: * LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
42: * NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
43: * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
44: *
45: */
46: /*
47: * MKLINUX-1.0DR2
48: */
49:
50: /* Routines to perform high-speed scrolling, assuming that the memory is
51: * non-cached, and that the amount of memory to be scrolled is a multiple
52: * of (at least) 16.
53: */
54:
55: #if 1 //notdef_next
56: #include <ppc/asm.h>
57: #include <ppc/proc_reg.h>
58:
59: /*
60: * void video_scroll_up(unsigned long start,
61: * unsigned long end,
62: * unsigned long dest)
63: */
64:
65: ENTRY(video_scroll_up, TAG_NO_FRAME_USED)
66:
67: /*
68: * Turn the FPU on, save regs
69: */
70: mfmsr ARG4
71: ori ARG3, ARG4, MASK(MSR_FP) /* bit is in low-order 16 */
72: mtmsr ARG3
73: isync
74:
75: stfd f0, -16(r1)
76: stfd f1, -8(r1)
77:
78: /* ok, now we can use the FPU registers to do some fast copying,
79: * maybe this can be more optimal but it's not bad
80: */
81:
82: .L_vscr_up_loop:
83: lfd f0, 0(ARG0)
84: lfd f1, 8(ARG0)
85:
86: addi ARG0, ARG0, 16
87:
88: stfd f0, 0(ARG2)
89:
90: cmp CR0,0, ARG0, ARG1
91:
92: stfd f1, 8(ARG2)
93:
94: addi ARG2, ARG2, 16
95:
96: blt+ CR0, .L_vscr_up_loop
97:
98: lfd f0, -16(r1)
99: lfd f1, -8(r1)
100:
101: /* re-disable the FPU */
102: sync
103: mtmsr ARG4
104: isync
105:
106: blr
107:
108: /*
109: * void video_scroll_down(unsigned long start, HIGH address to scroll from
110: * unsigned long end, LOW address
111: * unsigned long dest) HIGH address
112: */
113:
114: ENTRY(video_scroll_down, TAG_NO_FRAME_USED)
115:
116: /*
117: * Turn the FPU on, save regs
118: */
119: mfmsr ARG4
120: ori ARG3, ARG4, MASK(MSR_FP) /* bit is in low-order 16 */
121: mtmsr ARG3
122: isync
123:
124: stfd f0, -16(r1)
125: stfd f1, -8(r1)
126:
127: /* ok, now we can use the FPU registers to do some fast copying,
128: * maybe this can be more optimal but it's not bad
129: */
130:
131: .L_vscr_down_loop:
132: lfd f0, -16(ARG0)
133: lfd f1, -8(ARG0)
134:
135: subi ARG0, ARG0, 16
136:
137: stfd f0, -16(ARG2)
138:
139: cmp CR0,0, ARG0, ARG1
140:
141: stfd f1, -8(ARG2)
142:
143: subi ARG2, ARG2, 16
144:
145: bgt+ CR0, .L_vscr_down_loop
146:
147: lfd f0, -16(r1)
148: lfd f1, -8(r1)
149:
150: /* re-disable the FPU */
151: sync
152: mtmsr ARG4
153: isync
154:
155: blr
156: #endif notdef_next
157:
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