/* * 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 #include <linux/stringify.h> #include <asm/compiler.h> #define ___ssnop \ sll $0, $0, 1 #define ___ehb \ sll $0, $0, 3 /* * TLB hazards */ #if (defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)) && \ !defined(CONFIG_CPU_CAVIUM_OCTEON) && !defined(CONFIG_LOONGSON3_ENHANCEMENT) /* * MIPSR2 defines ehb for hazard avoidance */ #define __mtc0_tlbw_hazard \ ___ehb #define __mtc0_tlbr_hazard \ ___ehb #define __tlbw_use_hazard \ ___ehb #define __tlb_read_hazard \ ___ehb #define __tlb_probe_hazard \ ___ehb #define __irq_enable_hazard \ ___ehb #define __irq_disable_hazard \ ___ehb #define __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 alternative 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 "MIPS_ISA_LEVEL" \n" \ " dla %0, 1f \n" \ " jr.hb %0 \n" \ " .set mips0 \n" \ "1: \n" \ : "=r" (tmp)); \ } while (0) #elif (defined(CONFIG_CPU_MIPSR1) && !defined(CONFIG_MIPS_ALCHEMY)) || \ defined(CONFIG_CPU_BMIPS) /* * These are slightly complicated by the fact that we guarantee R1 kernels to * run fine on R2 processors. */ #define __mtc0_tlbw_hazard \ ___ssnop; \ ___ssnop; \ ___ehb #define __mtc0_tlbr_hazard \ ___ssnop; \ ___ssnop; \ ___ehb #define __tlbw_use_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop; \ ___ehb #define __tlb_read_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop; \ ___ehb #define __tlb_probe_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop; \ ___ehb #define __irq_enable_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop; \ ___ehb #define __irq_disable_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop; \ ___ehb #define __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 alternative 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_r6) \ __instruction_hazard(); \ } while (0) #elif defined(CONFIG_MIPS_ALCHEMY) || defined(CONFIG_CPU_CAVIUM_OCTEON) || \ defined(CONFIG_CPU_LOONGSON2) || defined(CONFIG_LOONGSON3_ENHANCEMENT) || \ defined(CONFIG_CPU_R10000) || defined(CONFIG_CPU_R5500) || defined(CONFIG_CPU_XLR) /* * R10000 rocks - all hazards handled in hardware, so this becomes a nobrainer. */ #define __mtc0_tlbw_hazard #define __mtc0_tlbr_hazard #define __tlbw_use_hazard #define __tlb_read_hazard #define __tlb_probe_hazard #define __irq_enable_hazard #define __irq_disable_hazard #define __back_to_back_c0_hazard #define instruction_hazard() do { } while (0) #elif defined(CONFIG_CPU_SB1) /* * Mostly like R4000 for historic reasons */ #define __mtc0_tlbw_hazard #define __mtc0_tlbr_hazard #define __tlbw_use_hazard #define __tlb_read_hazard #define __tlb_probe_hazard #define __irq_enable_hazard #define __irq_disable_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop #define __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. */ #define __mtc0_tlbw_hazard \ nop; \ nop #define __mtc0_tlbr_hazard \ nop; \ nop #define __tlbw_use_hazard \ nop; \ nop; \ nop #define __tlb_read_hazard \ nop; \ nop; \ nop #define __tlb_probe_hazard \ nop; \ nop; \ nop #define __irq_enable_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop #define __irq_disable_hazard \ nop; \ nop; \ nop #define __back_to_back_c0_hazard \ ___ssnop; \ ___ssnop; \ ___ssnop #define instruction_hazard() do { } while (0) #endif /* FPU hazards */ #if defined(CONFIG_CPU_SB1) #define __enable_fpu_hazard \ .set push; \ .set mips64; \ .set noreorder; \ ___ssnop; \ bnezl $0, .+4; \ ___ssnop; \ .set pop #define __disable_fpu_hazard #elif defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6) #define __enable_fpu_hazard \ ___ehb #define __disable_fpu_hazard \ ___ehb #else #define __enable_fpu_hazard \ nop; \ nop; \ nop; \ nop #define __disable_fpu_hazard \ ___ehb #endif #ifdef __ASSEMBLY__ #define _ssnop ___ssnop #define _ehb ___ehb #define mtc0_tlbw_hazard __mtc0_tlbw_hazard #define mtc0_tlbr_hazard __mtc0_tlbr_hazard #define tlbw_use_hazard __tlbw_use_hazard #define tlb_read_hazard __tlb_read_hazard #define tlb_probe_hazard __tlb_probe_hazard #define irq_enable_hazard __irq_enable_hazard #define irq_disable_hazard __irq_disable_hazard #define back_to_back_c0_hazard __back_to_back_c0_hazard #define enable_fpu_hazard __enable_fpu_hazard #define disable_fpu_hazard __disable_fpu_hazard #else #define _ssnop() \ do { \ __asm__ __volatile__( \ __stringify(___ssnop) \ ); \ } while (0) #define _ehb() \ do { \ __asm__ __volatile__( \ __stringify(___ehb) \ ); \ } while (0) #define mtc0_tlbw_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__mtc0_tlbw_hazard) \ ); \ } while (0) #define mtc0_tlbr_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__mtc0_tlbr_hazard) \ ); \ } while (0) #define tlbw_use_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__tlbw_use_hazard) \ ); \ } while (0) #define tlb_read_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__tlb_read_hazard) \ ); \ } while (0) #define tlb_probe_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__tlb_probe_hazard) \ ); \ } while (0) #define irq_enable_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__irq_enable_hazard) \ ); \ } while (0) #define irq_disable_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__irq_disable_hazard) \ ); \ } while (0) #define back_to_back_c0_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__back_to_back_c0_hazard) \ ); \ } while (0) #define enable_fpu_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__enable_fpu_hazard) \ ); \ } while (0) #define disable_fpu_hazard() \ do { \ __asm__ __volatile__( \ __stringify(__disable_fpu_hazard) \ ); \ } while (0) /* * MIPS R2 instruction hazard barrier. Needs to be called as a subroutine. */ extern void mips_ihb(void); #endif /* __ASSEMBLY__ */ #endif /* _ASM_HAZARDS_H */
Name | Type | Size | Permission | Actions |
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dec | Folder | 0755 |
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emma | Folder | 0755 |
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fw | Folder | 0755 |
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ip32 | Folder | 0755 |
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lasat | Folder | 0755 |
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mach-ar7 | Folder | 0755 |
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mach-ath25 | Folder | 0755 |
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mach-ath79 | Folder | 0755 |
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mach-au1x00 | Folder | 0755 |
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mach-bcm47xx | Folder | 0755 |
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mach-bcm63xx | Folder | 0755 |
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mach-bmips | Folder | 0755 |
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mach-cavium-octeon | Folder | 0755 |
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mach-cobalt | Folder | 0755 |
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mach-db1x00 | Folder | 0755 |
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mach-dec | Folder | 0755 |
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mach-emma2rh | Folder | 0755 |
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mach-generic | Folder | 0755 |
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mach-ip22 | Folder | 0755 |
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mach-ip27 | Folder | 0755 |
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mach-ip28 | Folder | 0755 |
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mach-ip32 | Folder | 0755 |
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mach-jazz | Folder | 0755 |
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mach-jz4740 | Folder | 0755 |
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mach-lantiq | Folder | 0755 |
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mach-lasat | Folder | 0755 |
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mach-loongson32 | Folder | 0755 |
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mach-loongson64 | Folder | 0755 |
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mach-malta | Folder | 0755 |
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mach-netlogic | Folder | 0755 |
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mach-paravirt | Folder | 0755 |
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mach-pic32 | Folder | 0755 |
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mach-pistachio | Folder | 0755 |
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mach-pmcs-msp71xx | Folder | 0755 |
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mach-pnx833x | Folder | 0755 |
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mach-ralink | Folder | 0755 |
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mach-rc32434 | Folder | 0755 |
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mach-rm | Folder | 0755 |
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mach-sibyte | Folder | 0755 |
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mach-tx39xx | Folder | 0755 |
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mach-tx49xx | Folder | 0755 |
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mach-vr41xx | Folder | 0755 |
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mach-xilfpga | Folder | 0755 |
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mips-boards | Folder | 0755 |
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netlogic | Folder | 0755 |
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octeon | Folder | 0755 |
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pci | Folder | 0755 |
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sgi | Folder | 0755 |
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sibyte | Folder | 0755 |
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sn | Folder | 0755 |
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txx9 | Folder | 0755 |
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vr41xx | Folder | 0755 |
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xtalk | Folder | 0755 |
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Kbuild | File | 577 B | 0644 |
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abi.h | File | 853 B | 0644 |
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addrspace.h | File | 4.1 KB | 0644 |
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amon.h | File | 409 B | 0644 |
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arch_hweight.h | File | 792 B | 0644 |
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asm-eva.h | File | 6.82 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-prototypes.h | File | 197 B | 0644 |
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asm.h | File | 8.47 KB | 0644 |
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asmmacro-32.h | File | 2.47 KB | 0644 |
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asmmacro-64.h | File | 1.22 KB | 0644 |
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asmmacro.h | File | 14.07 KB | 0644 |
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atomic.h | File | 19.73 KB | 0644 |
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barrier.h | File | 8.03 KB | 0644 |
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bcache.h | File | 2.04 KB | 0644 |
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bitops.h | File | 15.46 KB | 0644 |
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bitrev.h | File | 608 B | 0644 |
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bmips-spaces.h | File | 268 B | 0644 |
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bmips.h | File | 3.45 KB | 0644 |
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bootinfo.h | File | 5.08 KB | 0644 |
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branch.h | File | 2.35 KB | 0644 |
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break.h | File | 787 B | 0644 |
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bug.h | File | 759 B | 0644 |
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bugs.h | File | 944 B | 0644 |
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cache.h | File | 546 B | 0644 |
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cacheflush.h | File | 4.99 KB | 0644 |
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cacheops.h | File | 3.71 KB | 0644 |
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cdmm.h | File | 3.67 KB | 0644 |
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cevt-r4k.h | File | 823 B | 0644 |
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checksum.h | File | 6.43 KB | 0644 |
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clock.h | File | 997 B | 0644 |
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clocksource.h | File | 884 B | 0644 |
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cmp.h | File | 492 B | 0644 |
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cmpxchg.h | File | 5.28 KB | 0644 |
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compat-signal.h | File | 640 B | 0644 |
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compat.h | File | 6.66 KB | 0644 |
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compiler.h | File | 2.96 KB | 0644 |
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cop2.h | File | 1.77 KB | 0644 |
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cpu-features.h | File | 19.46 KB | 0644 |
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cpu-info.h | File | 5.84 KB | 0644 |
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cpu-type.h | File | 4.13 KB | 0644 |
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cpu.h | File | 15.54 KB | 0644 |
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cpufeature.h | File | 717 B | 0644 |
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debug.h | File | 654 B | 0644 |
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delay.h | File | 841 B | 0644 |
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device.h | File | 347 B | 0644 |
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div64.h | File | 2.17 KB | 0644 |
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dma-coherence.h | File | 813 B | 0644 |
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dma-mapping.h | File | 981 B | 0644 |
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dma.h | File | 9.92 KB | 0644 |
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ds1287.h | File | 1019 B | 0644 |
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dsemul.h | File | 3.24 KB | 0644 |
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dsp.h | File | 1.91 KB | 0644 |
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edac.h | File | 819 B | 0644 |
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elf.h | File | 15.04 KB | 0644 |
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errno.h | File | 429 B | 0644 |
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eva.h | File | 796 B | 0644 |
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exec.h | File | 579 B | 0644 |
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extable.h | File | 241 B | 0644 |
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fb.h | File | 372 B | 0644 |
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fixmap.h | File | 2.29 KB | 0644 |
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floppy.h | File | 1.57 KB | 0644 |
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fpregdef.h | File | 2.66 KB | 0644 |
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fpu.h | File | 5.21 KB | 0644 |
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fpu_emulator.h | File | 5.74 KB | 0644 |
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ftrace.h | File | 2.11 KB | 0644 |
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futex.h | File | 4.87 KB | 0644 |
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gio_device.h | File | 1.5 KB | 0644 |
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gt64120.h | File | 19.37 KB | 0644 |
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hardirq.h | File | 544 B | 0644 |
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hazards.h | File | 8.36 KB | 0644 |
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highmem.h | File | 1.72 KB | 0644 |
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hpet.h | File | 1.93 KB | 0644 |
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hugetlb.h | File | 2.76 KB | 0644 |
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hw_irq.h | File | 475 B | 0644 |
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i8259.h | File | 2.52 KB | 0644 |
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ide.h | File | 330 B | 0644 |
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idle.h | File | 689 B | 0644 |
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inst.h | File | 2.34 KB | 0644 |
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io.h | File | 18.44 KB | 0644 |
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irq.h | File | 2.26 KB | 0644 |
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irq_cpu.h | File | 708 B | 0644 |
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irq_gt641xx.h | File | 2.69 KB | 0644 |
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irq_regs.h | File | 744 B | 0644 |
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irqflags.h | File | 4.04 KB | 0644 |
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isa-rev.h | File | 556 B | 0644 |
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isadep.h | File | 603 B | 0644 |
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jazz.h | File | 8 KB | 0644 |
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jazzdma.h | File | 2.97 KB | 0644 |
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jump_label.h | File | 1.4 KB | 0644 |
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kdebug.h | File | 303 B | 0644 |
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kexec.h | File | 1.53 KB | 0644 |
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kgdb.h | File | 1.19 KB | 0644 |
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kmap_types.h | File | 221 B | 0644 |
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kprobes.h | File | 2.68 KB | 0644 |
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kvm_host.h | File | 37.88 KB | 0644 |
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kvm_para.h | File | 2.09 KB | 0644 |
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linkage.h | File | 306 B | 0644 |
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llsc.h | File | 623 B | 0644 |
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local.h | File | 4.99 KB | 0644 |
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m48t37.h | File | 732 B | 0644 |
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maar.h | File | 4.04 KB | 0644 |
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machine.h | File | 2.93 KB | 0644 |
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mc146818-time.h | File | 3.69 KB | 0644 |
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mc146818rtc.h | File | 450 B | 0644 |
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mips-cm.h | File | 15.86 KB | 0644 |
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mips-cpc.h | File | 5.83 KB | 0644 |
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mips-cps.h | File | 6.55 KB | 0644 |
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mips-gic.h | File | 12.3 KB | 0644 |
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mips-r2-to-r6-emul.h | File | 2.05 KB | 0644 |
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mips_machine.h | File | 1.32 KB | 0644 |
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mips_mt.h | File | 707 B | 0644 |
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mipsmtregs.h | File | 10.9 KB | 0644 |
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mipsprom.h | File | 2.1 KB | 0644 |
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mipsregs.h | File | 88.1 KB | 0644 |
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mmu.h | File | 550 B | 0644 |
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mmu_context.h | File | 5.41 KB | 0644 |
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mmzone.h | File | 561 B | 0644 |
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module.h | File | 4.45 KB | 0644 |
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msa.h | File | 8.01 KB | 0644 |
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msc01_ic.h | File | 6.55 KB | 0644 |
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nile4.h | File | 10.33 KB | 0644 |
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paccess.h | File | 3.07 KB | 0644 |
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page.h | File | 7.19 KB | 0644 |
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pci.h | File | 4.08 KB | 0644 |
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perf_event.h | File | 482 B | 0644 |
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pgalloc.h | File | 3.21 KB | 0644 |
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pgtable-32.h | File | 7.31 KB | 0644 |
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pgtable-64.h | File | 10.87 KB | 0644 |
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pgtable-bits.h | File | 7.36 KB | 0644 |
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pgtable.h | File | 17.34 KB | 0644 |
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pm-cps.h | File | 1.68 KB | 0644 |
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pm.h | File | 3.99 KB | 0644 |
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pmon.h | File | 1.64 KB | 0644 |
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prefetch.h | File | 2.1 KB | 0644 |
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processor.h | File | 11.71 KB | 0644 |
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prom.h | File | 845 B | 0644 |
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ptrace.h | File | 5.55 KB | 0644 |
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r4k-timer.h | File | 604 B | 0644 |
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r4kcache.h | File | 26.34 KB | 0644 |
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reboot.h | File | 440 B | 0644 |
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reg.h | File | 26 B | 0644 |
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regdef.h | File | 2.63 KB | 0644 |
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rtlx.h | File | 2.1 KB | 0644 |
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seccomp.h | File | 800 B | 0644 |
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serial.h | File | 607 B | 0644 |
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setup.h | File | 884 B | 0644 |
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sgialib.h | File | 2.45 KB | 0644 |
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sgiarcs.h | File | 15.32 KB | 0644 |
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shmparam.h | File | 352 B | 0644 |
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sigcontext.h | File | 1.04 KB | 0644 |
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signal.h | File | 1.02 KB | 0644 |
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sim.h | File | 2.32 KB | 0644 |
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smp-cps.h | File | 1.18 KB | 0644 |
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smp-ops.h | File | 2.33 KB | 0644 |
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smp.h | File | 3.31 KB | 0644 |
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sni.h | File | 7.27 KB | 0644 |
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socket.h | File | 1.34 KB | 0644 |
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sparsemem.h | File | 486 B | 0644 |
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spinlock.h | File | 459 B | 0644 |
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spinlock_types.h | File | 188 B | 0644 |
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spram.h | File | 262 B | 0644 |
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stackframe.h | File | 10.82 KB | 0644 |
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stackprotector.h | File | 1.15 KB | 0644 |
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stacktrace.h | File | 2.15 KB | 0644 |
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string.h | File | 2.94 KB | 0644 |
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switch_to.h | File | 4.19 KB | 0644 |
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syscall.h | File | 3.57 KB | 0644 |
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termios.h | File | 2.89 KB | 0644 |
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thread_info.h | File | 6.63 KB | 0644 |
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time.h | File | 2.13 KB | 0644 |
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timex.h | File | 2.87 KB | 0644 |
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tlb.h | File | 1.09 KB | 0644 |
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tlbdebug.h | File | 403 B | 0644 |
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tlbex.h | File | 788 B | 0644 |
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tlbflush.h | File | 1.67 KB | 0644 |
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tlbmisc.h | File | 320 B | 0644 |
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topology.h | File | 619 B | 0644 |
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traps.h | File | 1.25 KB | 0644 |
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txx9irq.h | File | 743 B | 0644 |
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txx9pio.h | File | 592 B | 0644 |
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txx9tmr.h | File | 1.59 KB | 0644 |
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types.h | File | 487 B | 0644 |
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uaccess.h | File | 22.2 KB | 0644 |
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uasm.h | File | 9.18 KB | 0644 |
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unistd.h | File | 1.9 KB | 0644 |
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uprobes.h | File | 1.11 KB | 0644 |
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vdso.h | File | 3.72 KB | 0644 |
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vga.h | File | 1.26 KB | 0644 |
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vpe.h | File | 2.7 KB | 0644 |
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war.h | File | 7.48 KB | 0644 |
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watch.h | File | 827 B | 0644 |
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wbflush.h | File | 694 B | 0644 |
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yamon-dt.h | File | 1.88 KB | 0644 |
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