diff options
Diffstat (limited to 'target/linux/realtek/files/arch/rlx/include/asm/hazards.h')
| -rw-r--r-- | target/linux/realtek/files/arch/rlx/include/asm/hazards.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/realtek/files/arch/rlx/include/asm/hazards.h b/target/linux/realtek/files/arch/rlx/include/asm/hazards.h new file mode 100644 index 000000000..5a3542960 --- /dev/null +++ b/target/linux/realtek/files/arch/rlx/include/asm/hazards.h @@ -0,0 +1,66 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2003, 04, 07 Ralf Baechle <ralf@linux-mips.org> + * Copyright (C) MIPS Technologies, Inc. + * written by Ralf Baechle <ralf@linux-mips.org> + */ +#ifndef _ASM_HAZARDS_H +#define _ASM_HAZARDS_H + +#ifdef __ASSEMBLY__ +#define ASMMACRO(name, code...) .macro name; code; .endm +#else + +#include <asm/cpu-features.h> + +#define ASMMACRO(name, code...) \ +__asm__(".macro " #name "; " #code "; .endm"); \ + \ +static inline void name(void) \ +{ \ + __asm__ __volatile__ (#name); \ +} + +#endif + +ASMMACRO(_ssnop, + sll $0, $0, 1 + ) + +ASMMACRO(_ehb, + sll $0, $0, 3 + ) + +/* + * Finally the catchall case for all other processors including R4000, R4400, + * R4600, R4700, R5000, RM7000, NEC VR41xx etc. + * + * The taken branch will result in a two cycle penalty for the two killed + * instructions on R4000 / R4400. Other processors only have a single cycle + * hazard so this is nice trick to have an optimal code for a range of + * processors. + */ +ASMMACRO(mtc0_tlbw_hazard, + nop; nop + ) +ASMMACRO(tlbw_use_hazard, + nop; nop; nop + ) +ASMMACRO(tlb_probe_hazard, + nop; nop; nop + ) +ASMMACRO(irq_enable_hazard, + _ssnop; _ssnop; _ssnop; + ) +ASMMACRO(irq_disable_hazard, + nop; nop; nop + ) +ASMMACRO(back_to_back_c0_hazard, + _ssnop; _ssnop; _ssnop; + ) +#define instruction_hazard() do { } while (0) + +#endif /* _ASM_HAZARDS_H */ |