1/* SPDX-License-Identifier: GPL-2.0-or-later */
 2/*
 3 * Basic assembly code to read BHRB entries
 4 *
 5 * Copyright 2013 Anshuman Khandual, IBM Corporation.
 
 
 
 
 
 6 */
 7#include <asm/ppc_asm.h>
 8#include <asm/ppc-opcode.h>
 9
10	.text
11
12.balign 8
13
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
17 * 32 BHRB entries.
18 */
19
20/* .global read_bhrb */
21_GLOBAL(read_bhrb)
22	cmpldi	r3,31
23	bgt	1f
24	LOAD_REG_ADDR(r4, bhrb_table)
25	sldi	r3,r3,3
26	add	r3,r4,r3
27	mtctr	r3
28	bctr
291:	li	r3,0
30	blr
31
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)
38
39bhrb_table:
40	MFBHRB_TABLE32(0)

 
 1/*
 2 * Basic assembly code to read BHRB entries
 3 *
 4 * Copyright 2013 Anshuman Khandual, IBM Corporation.
 5 *
 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.
10 */
11#include <asm/ppc_asm.h>
12#include <asm/ppc-opcode.h>
13
14	.text
15
16.balign 8
17
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
21 * 32 BHRB entries.
22 */
23
24/* .global read_bhrb */
25_GLOBAL(read_bhrb)
26	cmpldi	r3,31
27	bgt	1f
28	ld	r4,bhrb_table@got(r2)
29	sldi	r3,r3,3
30	add	r3,r4,r3
31	mtctr	r3
32	bctr
331:	li	r3,0
34	blr
35
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)
42
43bhrb_table:
44	MFBHRB_TABLE32(0)