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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
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.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * @OSF_COPYRIGHT@
24: */
25:
26: #include <debug.h>
27: #include <ppc/asm.h>
28: #include <ppc/proc_reg.h>
29: #include <mach/ppc/vm_param.h>
30: #include <assym.s>
31:
32: /* void
33: * db_phys_copy(src, dst, bytecount)
34: * vm_offset_t src;
35: * vm_offset_t dst;
36: * int bytecount
37: *
38: * This routine will copy bytecount bytes from physical address src to physical
39: * address dst.
40: */
41: ENTRY(db_phys_copy, TAG_NO_FRAME_USED)
42:
43: /* Switch off data translations */
44: mfmsr r6
45: rlwinm r7, r6, 0, MSR_DR_BIT+1, MSR_DR_BIT-1
46: mtmsr r7
47: isync /* Ensure data translations are off */
48:
49: subi r3, r3, 4
50: subi r4, r4, 4
51:
52: cmpwi r5, 3
53: ble- .L_db_phys_copy_bytes
54: .L_db_phys_copy_loop:
55: lwz r0, 4(r3)
56: addi r3, r3, 4
57: subi r5, r5, 4
58: stw r0, 4(r4)
59: addi r4, r4, 4
60: cmpwi r5, 3
61: bgt+ .L_db_phys_copy_loop
62:
63: /* If no leftover bytes, we're done now */
64: cmpwi r5, 0
65: beq+ .L_db_phys_copy_done
66:
67: .L_db_phys_copy_bytes:
68: addi r3, r3, 3
69: addi r4, r4, 3
70: .L_db_phys_copy_byte_loop:
71: lbz r0, 1(r3)
72: addi r3, r3, 1
73: subi r5, r5, 1
74: stb r0, 1(r4)
75: addi r4, r4, 1
76: cmpwi r5, 0
77: bne+ .L_db_phys_copy_loop
78:
79: .L_db_phys_copy_done:
80: mtmsr r6 /* Restore original translations */
81: isync /* Ensure data translations are off */
82:
83: blr
84:
85: /* void
86: * db_phys_cmp(src_a, src_b, bytecount)
87: * vm_offset_t src_a;
88: * vm_offset_t src_b;
89: * int bytecount
90: *
91: * This routine will compare bytecount bytes from physical address src_a and physical
92: * address src_b.
93: */
94:
95: /* Switch off data translations */
96: mfmsr r6
97: rlwinm r7, r6, 0, MSR_DR_BIT+1, MSR_DR_BIT-1
98: mtmsr r7
99: isync /* Ensure data translations are off */
100:
101: subi r3, r3, 4
102: subi r4, r4, 4
103:
104: cmpwi r5, 3
105: ble- .L_db_phys_cmp_bytes
106: .L_db_phys_cmp_loop:
107: lwz r0, 4(r3)
108: lwz r7, 4(r4)
109: addi r3, r3, 4
110: addi r4, r4, 4
111: subi r5, r5, 4
112: cmpw r0, r7
113: bne .L_db_phys_cmp_false
114: cmpwi r5, 3
115: bgt+ .L_db_phys_cmp_loop
116:
117: /* If no leftover bytes, we're done now */
118: cmpwi r5, 0
119: beq+ .L_db_phys_cmp_true
120:
121: .L_db_phys_cmp_bytes:
122: addi r3, r3, 3
123: addi r4, r4, 3
124: .L_db_phys_cmp_byte_loop:
125: lbz r0, 1(r3)
126: lbz r7, 1(r4)
127: addi r3, r3, 1
128: addi r4, r4, 1
129: subi r5, r5, 1
130: cmpw r0, r7
131: bne .L_db_phys_cmp_false
132: cmpwi r5, 0
133: bne+ .L_db_phys_cmp_loop
134:
135: .L_db_phys_cmp_true:
136: li r3, 1
137: b .L_db_phys_cmp_done
138:
139: .L_db_phys_cmp_false:
140: li r3, 0
141:
142: .L_db_phys_cmp_done:
143: mtmsr r6 /* Restore original translations */
144: isync /* Ensure data translations are off */
145:
146: blr
147:
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