projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 31cdd0c3 PM |
2 | #include <asm/ppc_asm.h> |
| 3 | ||
| 4 | /* unsigned long xmon_mfspr(sprn, default_value) */ | |
| 5 | _GLOBAL(xmon_mfspr) | |
| b42d9023 | 6 | PPC_LL r5, .Lmfspr_table@got(r2) |
| 31cdd0c3 PM |
7 | b xmon_mxspr |
| 8 | ||
| 9 | /* void xmon_mtspr(sprn, new_value) */ | |
| 10 | _GLOBAL(xmon_mtspr) | |
| b42d9023 | 11 | PPC_LL r5, .Lmtspr_table@got(r2) |
| 31cdd0c3 PM |
12 | b xmon_mxspr |
| 13 | ||
| 14 | /* | |
| 15 | * r3 = sprn | |
| 16 | * r4 = default or new value | |
| 17 | * r5 = table base | |
| 18 | */ | |
| 19 | xmon_mxspr: | |
| 20 | /* | |
| 21 | * To index into the table of mxsprs we need: | |
| 22 | * i = (sprn & 0x3ff) * 8 | |
| 23 | * or using rwlinm: | |
| 24 | * i = (sprn << 3) & (0x3ff << 3) | |
| 25 | */ | |
| 26 | rlwinm r3, r3, 3, 0x3ff << 3 | |
| 27 | add r5, r5, r3 | |
| 28 | mtctr r5 | |
| 29 | mr r3, r4 /* put default_value in r3 for mfspr */ | |
| 30 | bctr | |
| 31 | ||
| 32 | .Lmfspr_table: | |
| 33 | spr = 0 | |
| 34 | .rept 1024 | |
| 35 | mfspr r3, spr | |
| 36 | blr | |
| 37 | spr = spr + 1 | |
| 38 | .endr | |
| 39 | ||
| 40 | .Lmtspr_table: | |
| 41 | spr = 0 | |
| 42 | .rept 1024 | |
| 43 | mtspr spr, r4 | |
| 44 | blr | |
| 45 | spr = spr + 1 | |
| 46 | .endr |