1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* "Indirect" DCR access
*
* Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net>
*/
#include <asm/ppc_asm.h>
#include <asm/processor.h>
#include <asm/bug.h>
#include <asm/export.h>
#define DCR_ACCESS_PROLOG(table) \
cmplwi cr0,r3,1024; \
rlwinm r3,r3,4,18,27; \
lis r5,table@h; \
ori r5,r5,table@l; \
add r3,r3,r5; \
bge- 1f; \
mtctr r3; \
bctr; \
1: trap; \
EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \
blr
_GLOBAL(__mfdcr)
DCR_ACCESS_PROLOG(__mfdcr_table)
EXPORT_SYMBOL(__mfdcr)
_GLOBAL(__mtdcr)
DCR_ACCESS_PROLOG(__mtdcr_table)
EXPORT_SYMBOL(__mtdcr)
__mfdcr_table:
mfdcr r3,0; blr
__mtdcr_table:
mtdcr 0,r4; blr
dcr = 1
.rept 1023
mfdcr r3,dcr; blr
mtdcr dcr,r4; blr
dcr = dcr + 1
.endr
|
