| /* |
| * 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_INTERRUPT_H |
| #define _ASM_INTERRUPT_H |
| |
| #include <linux/config.h> |
| #include <asm/hazards.h> |
| |
| __asm__ ( |
| " .macro local_irq_enable \n" |
| " .set push \n" |
| " .set reorder \n" |
| " .set noat \n" |
| #ifdef 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 local_irq_enable(void) |
| { |
| __asm__ __volatile__( |
| "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. |
| */ |
| __asm__ ( |
| " .macro local_irq_disable\n" |
| " .set push \n" |
| " .set noat \n" |
| #ifdef CONFIG_CPU_MIPSR2 |
| " di \n" |
| #else |
| " mfc0 $1,$12 \n" |
| " ori $1,1 \n" |
| " xori $1,1 \n" |
| " .set noreorder \n" |
| " mtc0 $1,$12 \n" |
| #endif |
| " irq_disable_hazard \n" |
| " .set pop \n" |
| " .endm \n"); |
| |
| static inline void local_irq_disable(void) |
| { |
| __asm__ __volatile__( |
| "local_irq_disable" |
| : /* no outputs */ |
| : /* no inputs */ |
| : "memory"); |
| } |
| |
| __asm__ ( |
| " .macro local_save_flags flags \n" |
| " .set push \n" |
| " .set reorder \n" |
| " mfc0 \\flags, $12 \n" |
| " .set pop \n" |
| " .endm \n"); |
| |
| #define local_save_flags(x) \ |
| __asm__ __volatile__( \ |
| "local_save_flags %0" \ |
| : "=r" (x)) |
| |
| __asm__ ( |
| " .macro local_irq_save result \n" |
| " .set push \n" |
| " .set reorder \n" |
| " .set noat \n" |
| #ifdef CONFIG_CPU_MIPSR2 |
| " di \\result \n" |
| " andi \\result, 1 \n" |
| #else |
| " mfc0 \\result, $12 \n" |
| " ori $1, \\result, 1 \n" |
| " xori $1, 1 \n" |
| " .set noreorder \n" |
| " mtc0 $1, $12 \n" |
| #endif |
| " irq_disable_hazard \n" |
| " .set pop \n" |
| " .endm \n"); |
| |
| #define local_irq_save(x) \ |
| __asm__ __volatile__( \ |
| "local_irq_save\t%0" \ |
| : "=r" (x) \ |
| : /* no inputs */ \ |
| : "memory") |
| |
| __asm__ ( |
| " .macro local_irq_restore flags \n" |
| " .set push \n" |
| " .set noreorder \n" |
| " .set noat \n" |
| #if 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, 1 \n" |
| " xori $1, 1 \n" |
| " or \\flags, $1 \n" |
| " mtc0 \\flags, $12 \n" |
| #endif |
| " irq_disable_hazard \n" |
| " .set pop \n" |
| " .endm \n"); |
| |
| #define local_irq_restore(flags) \ |
| do { \ |
| unsigned long __tmp1; \ |
| \ |
| __asm__ __volatile__( \ |
| "local_irq_restore\t%0" \ |
| : "=r" (__tmp1) \ |
| : "0" (flags) \ |
| : "memory"); \ |
| } while(0) |
| |
| #define irqs_disabled() \ |
| ({ \ |
| unsigned long flags; \ |
| local_save_flags(flags); \ |
| !(flags & 1); \ |
| }) |
| |
| #endif /* _ASM_INTERRUPT_H */ |