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- /* SPDX-License-Identifier: GPL-2.0 */
- #include <asm/ppc_asm.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
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