]>
Commit | Line | Data |
---|---|---|
2cd97647 DG |
1 | /* |
2 | * This file contains miscellaneous low-level functions for PPC 44x. | |
3 | * Copyright 2007 David Gibson <dwg@au1.ibm.com>, IBM Corporation. | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or | |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
9 | * | |
10 | */ | |
11 | ||
12 | #include <asm/reg.h> | |
13 | #include <asm/ppc_asm.h> | |
14 | ||
15 | .text | |
16 | ||
d9b55a03 DG |
17 | /* |
18 | * Do an IO access in AS1 | |
19 | */ | |
20 | _GLOBAL(as1_readb) | |
21 | mfmsr r7 | |
22 | ori r0,r7,MSR_DS | |
23 | sync | |
24 | mtmsr r0 | |
25 | sync | |
26 | isync | |
27 | lbz r3,0(r3) | |
28 | sync | |
29 | mtmsr r7 | |
30 | sync | |
31 | isync | |
32 | blr | |
33 | ||
34 | _GLOBAL(as1_writeb) | |
35 | mfmsr r7 | |
36 | ori r0,r7,MSR_DS | |
37 | sync | |
38 | mtmsr r0 | |
39 | sync | |
40 | isync | |
41 | stb r3,0(r4) | |
42 | sync | |
43 | mtmsr r7 | |
44 | sync | |
45 | isync | |
46 | blr |