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Diffstat (limited to '')
| -rw-r--r-- | arch/mips/kernel/probes-common.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/mips/kernel/probes-common.h b/arch/mips/kernel/probes-common.h new file mode 100644 index 000000000..d2bf77b18 --- /dev/null +++ b/arch/mips/kernel/probes-common.h @@ -0,0 +1,83 @@ +/* + * Copyright (C) 2016 Imagination Technologies + * Author: Marcin Nowakowski <marcin.nowakowski@mips.com> + * + * 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. + */ + +#ifndef __PROBES_COMMON_H +#define __PROBES_COMMON_H + +#include <asm/inst.h> + +int __insn_is_compact_branch(union mips_instruction insn); + +static inline int __insn_has_delay_slot(const union mips_instruction insn) +{ + switch (insn.i_format.opcode) { + /* + * jr and jalr are in r_format format. + */ + case spec_op: + switch (insn.r_format.func) { + case jalr_op: + case jr_op: + return 1; + } + break; + + /* + * This group contains: + * bltz_op, bgez_op, bltzl_op, bgezl_op, + * bltzal_op, bgezal_op, bltzall_op, bgezall_op. + */ + case bcond_op: + switch (insn.i_format.rt) { + case bltz_op: + case bltzl_op: + case bgez_op: + case bgezl_op: + case bltzal_op: + case bltzall_op: + case bgezal_op: + case bgezall_op: + case bposge32_op: + return 1; + } + break; + + /* + * These are unconditional and in j_format. + */ + case jal_op: + case j_op: + case beq_op: + case beql_op: + case bne_op: + case bnel_op: + case blez_op: /* not really i_format */ + case blezl_op: + case bgtz_op: + case bgtzl_op: + return 1; + + /* + * And now the FPA/cp1 branch instructions. + */ + case cop1_op: +#ifdef CONFIG_CPU_CAVIUM_OCTEON + case lwc2_op: /* This is bbit0 on Octeon */ + case ldc2_op: /* This is bbit032 on Octeon */ + case swc2_op: /* This is bbit1 on Octeon */ + case sdc2_op: /* This is bbit132 on Octeon */ +#endif + return 1; + } + + return 0; +} + +#endif /* __PROBES_COMMON_H */ |