2 * Basic assembly code to read BHRB entries
4 * Copyright 2013 Anshuman Khandual, IBM Corporation.
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
11 #include <asm/ppc_asm.h>
12 #include <asm/ppc-opcode.h>
18 /* r3 = n (where n = [0-31])
19 * The maximum number of BHRB entries supported with PPC_MFBHRBE instruction
20 * is 1024. We have limited number of table entries here as POWER8 implements
24 /* .global read_bhrb */
28 ld r4,bhrb_table@got(r2)
36 #define MFBHRB_TABLE1(n) PPC_MFBHRBE(R3,n); blr
37 #define MFBHRB_TABLE2(n) MFBHRB_TABLE1(n); MFBHRB_TABLE1(n+1)
38 #define MFBHRB_TABLE4(n) MFBHRB_TABLE2(n); MFBHRB_TABLE2(n+2)
39 #define MFBHRB_TABLE8(n) MFBHRB_TABLE4(n); MFBHRB_TABLE4(n+4)
40 #define MFBHRB_TABLE16(n) MFBHRB_TABLE8(n); MFBHRB_TABLE8(n+8)
41 #define MFBHRB_TABLE32(n) MFBHRB_TABLE16(n); MFBHRB_TABLE16(n+16)