/* 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) | |
PPC_LL r5, .Lmfspr_table@got(r2) | |
b xmon_mxspr | |
/* void xmon_mtspr(sprn, new_value) */ | |
_GLOBAL(xmon_mtspr) | |
PPC_LL r5, .Lmtspr_table@got(r2) | |
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 |