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- /*
- * Basic assembly code to read BHRB entries
- *
- * Copyright 2013 Anshuman Khandual, IBM Corporation.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #include <asm/ppc_asm.h>
- #include <asm/ppc-opcode.h>
- .text
- .balign 8
- /* r3 = n (where n = [0-31])
- * The maximum number of BHRB entries supported with PPC_MFBHRBE instruction
- * is 1024. We have limited number of table entries here as POWER8 implements
- * 32 BHRB entries.
- */
- /* .global read_bhrb */
- _GLOBAL(read_bhrb)
- cmpldi r3,31
- bgt 1f
- ld r4,bhrb_table@got(r2)
- sldi r3,r3,3
- add r3,r4,r3
- mtctr r3
- bctr
- 1: li r3,0
- blr
- #define MFBHRB_TABLE1(n) PPC_MFBHRBE(R3,n); blr
- #define MFBHRB_TABLE2(n) MFBHRB_TABLE1(n); MFBHRB_TABLE1(n+1)
- #define MFBHRB_TABLE4(n) MFBHRB_TABLE2(n); MFBHRB_TABLE2(n+2)
- #define MFBHRB_TABLE8(n) MFBHRB_TABLE4(n); MFBHRB_TABLE4(n+4)
- #define MFBHRB_TABLE16(n) MFBHRB_TABLE8(n); MFBHRB_TABLE8(n+8)
- #define MFBHRB_TABLE32(n) MFBHRB_TABLE16(n); MFBHRB_TABLE16(n+16)
- bhrb_table:
- MFBHRB_TABLE32(0)
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