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Diffstat (limited to 'include/asm-mips/irqflags.h')
| -rw-r--r-- | include/asm-mips/irqflags.h | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/include/asm-mips/irqflags.h b/include/asm-mips/irqflags.h deleted file mode 100644 index 881e8866501d..000000000000 --- a/include/asm-mips/irqflags.h +++ /dev/null @@ -1,263 +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) 1994, 95, 96, 97, 98, 99, 2003 by Ralf Baechle - * Copyright (C) 1996 by Paul M. Antoine - * Copyright (C) 1999 Silicon Graphics - * Copyright (C) 2000 MIPS Technologies, Inc. - */ -#ifndef _ASM_IRQFLAGS_H -#define _ASM_IRQFLAGS_H - -#ifndef __ASSEMBLY__ - -#include <linux/compiler.h> -#include <asm/hazards.h> - -__asm__( - " .macro raw_local_irq_enable \n" - " .set push \n" - " .set reorder \n" - " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 # SMTC - clear TCStatus.IXMT \n" - " ori $1, 0x400 \n" - " xori $1, 0x400 \n" - " mtc0 $1, $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) - " ei \n" -#else - " mfc0 $1,$12 \n" - " ori $1,0x1f \n" - " xori $1,0x1e \n" - " mtc0 $1,$12 \n" -#endif - " irq_enable_hazard \n" - " .set pop \n" - " .endm"); - -static inline void raw_local_irq_enable(void) -{ - __asm__ __volatile__( - "raw_local_irq_enable" - : /* no outputs */ - : /* no inputs */ - : "memory"); -} - -/* - * For cli() we have to insert nops to make sure that the new value - * has actually arrived in the status register before the end of this - * macro. - * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs - * no nops at all. - */ -/* - * For TX49, operating only IE bit is not enough. - * - * If mfc0 $12 follows store and the mfc0 is last instruction of a - * page and fetching the next instruction causes TLB miss, the result - * of the mfc0 might wrongly contain EXL bit. - * - * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008 - * - * Workaround: mask EXL bit of the result or place a nop before mfc0. - */ -__asm__( - " .macro raw_local_irq_disable\n" - " .set push \n" - " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 $1, $2, 1 \n" - " ori $1, 0x400 \n" - " .set noreorder \n" - " mtc0 $1, $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) - " di \n" -#else - " mfc0 $1,$12 \n" - " ori $1,0x1f \n" - " xori $1,0x1f \n" - " .set noreorder \n" - " mtc0 $1,$12 \n" -#endif - " irq_disable_hazard \n" - " .set pop \n" - " .endm \n"); - -static inline void raw_local_irq_disable(void) -{ - __asm__ __volatile__( - "raw_local_irq_disable" - : /* no outputs */ - : /* no inputs */ - : "memory"); -} - -__asm__( - " .macro raw_local_save_flags flags \n" - " .set push \n" - " .set reorder \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 \\flags, $2, 1 \n" -#else - " mfc0 \\flags, $12 \n" -#endif - " .set pop \n" - " .endm \n"); - -#define raw_local_save_flags(x) \ -__asm__ __volatile__( \ - "raw_local_save_flags %0" \ - : "=r" (x)) - -__asm__( - " .macro raw_local_irq_save result \n" - " .set push \n" - " .set reorder \n" - " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - " mfc0 \\result, $2, 1 \n" - " ori $1, \\result, 0x400 \n" - " .set noreorder \n" - " mtc0 $1, $2, 1 \n" - " andi \\result, \\result, 0x400 \n" -#elif defined(CONFIG_CPU_MIPSR2) - " di \\result \n" - " andi \\result, 1 \n" -#else - " mfc0 \\result, $12 \n" - " ori $1, \\result, 0x1f \n" - " xori $1, 0x1f \n" - " .set noreorder \n" - " mtc0 $1, $12 \n" -#endif - " irq_disable_hazard \n" - " .set pop \n" - " .endm \n"); - -#define raw_local_irq_save(x) \ -__asm__ __volatile__( \ - "raw_local_irq_save\t%0" \ - : "=r" (x) \ - : /* no inputs */ \ - : "memory") - -__asm__( - " .macro raw_local_irq_restore flags \n" - " .set push \n" - " .set noreorder \n" - " .set noat \n" -#ifdef CONFIG_MIPS_MT_SMTC - "mfc0 $1, $2, 1 \n" - "andi \\flags, 0x400 \n" - "ori $1, 0x400 \n" - "xori $1, 0x400 \n" - "or \\flags, $1 \n" - "mtc0 \\flags, $2, 1 \n" -#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU) - /* - * Slow, but doesn't suffer from a relativly unlikely race - * condition we're having since days 1. - */ - " beqz \\flags, 1f \n" - " di \n" - " ei \n" - "1: \n" -#elif defined(CONFIG_CPU_MIPSR2) - /* - * Fast, dangerous. Life is fun, life is good. - */ - " mfc0 $1, $12 \n" - " ins $1, \\flags, 0, 1 \n" - " mtc0 $1, $12 \n" -#else - " mfc0 $1, $12 \n" - " andi \\flags, 1 \n" - " ori $1, 0x1f \n" - " xori $1, 0x1f \n" - " or \\flags, $1 \n" - " mtc0 \\flags, $12 \n" -#endif - " irq_disable_hazard \n" - " .set pop \n" - " .endm \n"); - -extern void smtc_ipi_replay(void); - -static inline void raw_local_irq_restore(unsigned long flags) -{ - unsigned long __tmp1; - -#ifdef CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY - /* - * CONFIG_MIPS_MT_SMTC_INSTANT_REPLAY does prompt replay of deferred - * IPIs, at the cost of branch and call overhead on each - * local_irq_restore() - */ - if (unlikely(!(flags & 0x0400))) - smtc_ipi_replay(); -#endif - - __asm__ __volatile__( - "raw_local_irq_restore\t%0" - : "=r" (__tmp1) - : "0" (flags) - : "memory"); -} - -static inline int raw_irqs_disabled_flags(unsigned long flags) -{ -#ifdef CONFIG_MIPS_MT_SMTC - /* - * SMTC model uses TCStatus.IXMT to disable interrupts for a thread/CPU - */ - return flags & 0x400; -#else - return !(flags & 1); -#endif -} - -#endif - -/* - * Do the CPU's IRQ-state tracing from assembly code. - */ -#ifdef CONFIG_TRACE_IRQFLAGS -/* Reload some registers clobbered by trace_hardirqs_on */ -#ifdef CONFIG_64BIT -# define TRACE_IRQS_RELOAD_REGS \ - LONG_L $11, PT_R11(sp); \ - LONG_L $10, PT_R10(sp); \ - LONG_L $9, PT_R9(sp); \ - LONG_L $8, PT_R8(sp); \ - LONG_L $7, PT_R7(sp); \ - LONG_L $6, PT_R6(sp); \ - LONG_L $5, PT_R5(sp); \ - LONG_L $4, PT_R4(sp); \ - LONG_L $2, PT_R2(sp) -#else -# define TRACE_IRQS_RELOAD_REGS \ - LONG_L $7, PT_R7(sp); \ - LONG_L $6, PT_R6(sp); \ - LONG_L $5, PT_R5(sp); \ - LONG_L $4, PT_R4(sp); \ - LONG_L $2, PT_R2(sp) -#endif -# define TRACE_IRQS_ON \ - CLI; /* make sure trace_hardirqs_on() is called in kernel level */ \ - jal trace_hardirqs_on -# define TRACE_IRQS_ON_RELOAD \ - TRACE_IRQS_ON; \ - TRACE_IRQS_RELOAD_REGS -# define TRACE_IRQS_OFF \ - jal trace_hardirqs_off -#else -# define TRACE_IRQS_ON -# define TRACE_IRQS_ON_RELOAD -# define TRACE_IRQS_OFF -#endif - -#endif /* _ASM_IRQFLAGS_H */ |
