blob: c308ddf268fbc15d274fbebf85e68dd7881f4c8e (
plain)
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
45
46
47
|
/* SPDX-License-Identifier: GPL-2.0 */
#include <asm/ppc_asm.h>
#include <asm/asm-compat.h>
/* unsigned long xmon_mfspr(sprn, default_value) */
_GLOBAL(xmon_mfspr)
LOAD_REG_ADDR(r5, .Lmfspr_table)
b xmon_mxspr
/* void xmon_mtspr(sprn, new_value) */
_GLOBAL(xmon_mtspr)
LOAD_REG_ADDR(r5, .Lmtspr_table)
b xmon_mxspr
/*
* r3 = sprn
* r4 = default or new value
* r5 = table base
*/
xmon_mxspr:
/*
* To index into the table of mxsprs we need:
* i = (sprn & 0x3ff) * 8
* or using rwlinm:
* i = (sprn << 3) & (0x3ff << 3)
*/
rlwinm r3, r3, 3, 0x3ff << 3
add r5, r5, r3
mtctr r5
mr r3, r4 /* put default_value in r3 for mfspr */
bctr
.Lmfspr_table:
spr = 0
.rept 1024
mfspr r3, spr
blr
spr = spr + 1
.endr
.Lmtspr_table:
spr = 0
.rept 1024
mtspr spr, r4
blr
spr = spr + 1
.endr
|
