1/*
 2 * This file is subject to the terms and conditions of the GNU General Public
 3 * License.  See the file "COPYING" in the main directory of this archive
 4 * for more details.
 5 *
 6 * Macros for 32/64-bit neutral inline assembler
 7 */
 8
 9#ifndef __ASM_LLSC_H
10#define __ASM_LLSC_H
11
12#include <asm/isa-rev.h>
13
14#if _MIPS_SZLONG == 32
15#define __LL		"ll	"
16#define __SC		"sc	"
17#define __INS		"ins	"
18#define __EXT		"ext	"
19#elif _MIPS_SZLONG == 64
20#define __LL		"lld	"
21#define __SC		"scd	"
22#define __INS		"dins	"
23#define __EXT		"dext	"
24#endif
25
26/*
27 * Using a branch-likely instruction to check the result of an sc instruction
28 * works around a bug present in R10000 CPUs prior to revision 3.0 that could
29 * cause ll-sc sequences to execute non-atomically.
30 */
31#if R10000_LLSC_WAR
32# define __SC_BEQZ "beqzl	"
33#elif MIPS_ISA_REV >= 6
34# define __SC_BEQZ "beqzc	"
35#else
36# define __SC_BEQZ "beqz	"
37#endif
38
39#endif /* __ASM_LLSC_H  */