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-rw-r--r--include/asm-mips/hazards.h271
1 files changed, 0 insertions, 271 deletions
diff --git a/include/asm-mips/hazards.h b/include/asm-mips/hazards.h
deleted file mode 100644
index 2de638f84c8..00000000000
--- a/include/asm-mips/hazards.h
+++ /dev/null
@@ -1,271 +0,0 @@
-/*
- * 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); \
-}
-
-/*
- * MIPS R2 instruction hazard barrier. Needs to be called as a subroutine.
- */
-extern void mips_ihb(void);
-
-#endif
-
-ASMMACRO(_ssnop,
- sll $0, $0, 1
- )
-
-ASMMACRO(_ehb,
- sll $0, $0, 3
- )
-
-/*
- * TLB hazards
- */
-#if defined(CONFIG_CPU_MIPSR2)
-
-/*
- * MIPSR2 defines ehb for hazard avoidance
- */
-
-ASMMACRO(mtc0_tlbw_hazard,
- _ehb
- )
-ASMMACRO(tlbw_use_hazard,
- _ehb
- )
-ASMMACRO(tlb_probe_hazard,
- _ehb
- )
-ASMMACRO(irq_enable_hazard,
- _ehb
- )
-ASMMACRO(irq_disable_hazard,
- _ehb
- )
-ASMMACRO(back_to_back_c0_hazard,
- _ehb
- )
-/*
- * gcc has a tradition of misscompiling the previous construct using the
- * address of a label as argument to inline assembler. Gas otoh has the
- * annoying difference between la and dla which are only usable for 32-bit
- * rsp. 64-bit code, so can't be used without conditional compilation.
- * The alterantive is switching the assembler to 64-bit code which happens
- * to work right even for 32-bit code ...
- */
-#define instruction_hazard() \
-do { \
- unsigned long tmp; \
- \
- __asm__ __volatile__( \
- " .set mips64r2 \n" \
- " dla %0, 1f \n" \
- " jr.hb %0 \n" \
- " .set mips0 \n" \
- "1: \n" \
- : "=r" (tmp)); \
-} while (0)
-
-#elif defined(CONFIG_CPU_MIPSR1)
-
-/*
- * These are slightly complicated by the fact that we guarantee R1 kernels to
- * run fine on R2 processors.
- */
-ASMMACRO(mtc0_tlbw_hazard,
- _ssnop; _ssnop; _ehb
- )
-ASMMACRO(tlbw_use_hazard,
- _ssnop; _ssnop; _ssnop; _ehb
- )
-ASMMACRO(tlb_probe_hazard,
- _ssnop; _ssnop; _ssnop; _ehb
- )
-ASMMACRO(irq_enable_hazard,
- _ssnop; _ssnop; _ssnop; _ehb
- )
-ASMMACRO(irq_disable_hazard,
- _ssnop; _ssnop; _ssnop; _ehb
- )
-ASMMACRO(back_to_back_c0_hazard,
- _ssnop; _ssnop; _ssnop; _ehb
- )
-/*
- * gcc has a tradition of misscompiling the previous construct using the
- * address of a label as argument to inline assembler. Gas otoh has the
- * annoying difference between la and dla which are only usable for 32-bit
- * rsp. 64-bit code, so can't be used without conditional compilation.
- * The alterantive is switching the assembler to 64-bit code which happens
- * to work right even for 32-bit code ...
- */
-#define __instruction_hazard() \
-do { \
- unsigned long tmp; \
- \
- __asm__ __volatile__( \
- " .set mips64r2 \n" \
- " dla %0, 1f \n" \
- " jr.hb %0 \n" \
- " .set mips0 \n" \
- "1: \n" \
- : "=r" (tmp)); \
-} while (0)
-
-#define instruction_hazard() \
-do { \
- if (cpu_has_mips_r2) \
- __instruction_hazard(); \
-} while (0)
-
-#elif defined(CONFIG_CPU_R10000)
-
-/*
- * R10000 rocks - all hazards handled in hardware, so this becomes a nobrainer.
- */
-
-ASMMACRO(mtc0_tlbw_hazard,
- )
-ASMMACRO(tlbw_use_hazard,
- )
-ASMMACRO(tlb_probe_hazard,
- )
-ASMMACRO(irq_enable_hazard,
- )
-ASMMACRO(irq_disable_hazard,
- )
-ASMMACRO(back_to_back_c0_hazard,
- )
-#define instruction_hazard() do { } while (0)
-
-#elif defined(CONFIG_CPU_RM9000)
-
-/*
- * RM9000 hazards. When the JTLB is updated by tlbwi or tlbwr, a subsequent
- * use of the JTLB for instructions should not occur for 4 cpu cycles and use
- * for data translations should not occur for 3 cpu cycles.
- */
-
-ASMMACRO(mtc0_tlbw_hazard,
- _ssnop; _ssnop; _ssnop; _ssnop
- )
-ASMMACRO(tlbw_use_hazard,
- _ssnop; _ssnop; _ssnop; _ssnop
- )
-ASMMACRO(tlb_probe_hazard,
- _ssnop; _ssnop; _ssnop; _ssnop
- )
-ASMMACRO(irq_enable_hazard,
- )
-ASMMACRO(irq_disable_hazard,
- )
-ASMMACRO(back_to_back_c0_hazard,
- )
-#define instruction_hazard() do { } while (0)
-
-#elif defined(CONFIG_CPU_SB1)
-
-/*
- * Mostly like R4000 for historic reasons
- */
-ASMMACRO(mtc0_tlbw_hazard,
- )
-ASMMACRO(tlbw_use_hazard,
- )
-ASMMACRO(tlb_probe_hazard,
- )
-ASMMACRO(irq_enable_hazard,
- )
-ASMMACRO(irq_disable_hazard,
- _ssnop; _ssnop; _ssnop
- )
-ASMMACRO(back_to_back_c0_hazard,
- )
-#define instruction_hazard() do { } while (0)
-
-#else
-
-/*
- * 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
-
-
-/* FPU hazards */
-
-#if defined(CONFIG_CPU_SB1)
-ASMMACRO(enable_fpu_hazard,
- .set push;
- .set mips64;
- .set noreorder;
- _ssnop;
- bnezl $0, .+4;
- _ssnop;
- .set pop
-)
-ASMMACRO(disable_fpu_hazard,
-)
-
-#elif defined(CONFIG_CPU_MIPSR2)
-ASMMACRO(enable_fpu_hazard,
- _ehb
-)
-ASMMACRO(disable_fpu_hazard,
- _ehb
-)
-#else
-ASMMACRO(enable_fpu_hazard,
- nop; nop; nop; nop
-)
-ASMMACRO(disable_fpu_hazard,
- _ehb
-)
-#endif
-
-#endif /* _ASM_HAZARDS_H */