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| /* 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
|
|
