1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Basic assembly code to read BHRB entries
5 * Copyright 2013 Anshuman Khandual, IBM Corporation.
7 #include <asm/ppc_asm.h>
8 #include <asm/ppc-opcode.h>
14 /* r3 = n (where n = [0-31])
15 * The maximum number of BHRB entries supported with PPC_MFBHRBE instruction
16 * is 1024. We have limited number of table entries here as POWER8 implements
20 /* .global read_bhrb */
24 ld r4,bhrb_table@got(r2)
32 #define MFBHRB_TABLE1(n) PPC_MFBHRBE(R3,n); blr
33 #define MFBHRB_TABLE2(n) MFBHRB_TABLE1(n); MFBHRB_TABLE1(n+1)
34 #define MFBHRB_TABLE4(n) MFBHRB_TABLE2(n); MFBHRB_TABLE2(n+2)
35 #define MFBHRB_TABLE8(n) MFBHRB_TABLE4(n); MFBHRB_TABLE4(n+4)
36 #define MFBHRB_TABLE16(n) MFBHRB_TABLE8(n); MFBHRB_TABLE8(n+8)
37 #define MFBHRB_TABLE32(n) MFBHRB_TABLE16(n); MFBHRB_TABLE16(n+16)