LXR uboot/arch/nds32/include/asm/system.h

   1/*
   2 * Copyright (C) 2011 Andes Technology Corporation
   3 * Macpaul Lin, Andes Technology Corporation <macpaul@andestech.com>
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#ifndef __ASM_NDS_SYSTEM_H
   9#define __ASM_NDS_SYSTEM_H
  10
  11/*
  12 * Interrupt configuring macros.
  13 */
  14
  15extern int irq_flags;
  16
  17#define local_irq_enable() \
  18        __asm__ __volatile__ ( \
  19                "mfsr   %0, $psw\n\t" \
  20                "andi   %0, %0, 0x1\n\t" \
  21                "setgie.e\n\t" \
  22                : \
  23                : "r" (irq_flags) \
  24        )
  25
  26#define local_irq_disable() \
  27        do { \
  28                int __tmp_dummy; \
  29                __asm__ __volatile__ ( \
  30                        "mfsr   %0, $psw\n\t" \
  31                        "andi   %0, %0, 0x1\n\t" \
  32                        "setgie.d\n\t" \
  33                        "dsb\n\t" \
  34                        : "=r" (__tmp_dummy) \
  35                ); \
  36        } while (0)
  37
  38#define local_irq_save(x) \
  39        __asm__ __volatile__ ( \
  40                "mfsr   %0, $psw\n\t" \
  41                "andi   %0, %0, 0x1\n\t" \
  42                "setgie.d\n\t" \
  43                "dsb\n\t" \
  44                : "=&r" (x) \
  45        )
  46
  47#define local_save_flags(x) \
  48        __asm__ __volatile__ ( \
  49                "mfsr   %0, $psw\n\t" \
  50                "andi   %0, %0, 0x1\n\t" \
  51                "setgie.e\n\t" \
  52                "setgie.d\n\t" \
  53                : "=r" (x) \
  54        )
  55
  56#define irqs_enabled_from_flags(x) ((x) != 0x1f)
  57
  58#define local_irq_restore(x) \
  59        do { \
  60                if (irqs_enabled_from_flags(x)) \
  61                        local_irq_enable(); \
  62        } while (0)
  63
  64/*
  65 * Force strict CPU ordering.
  66 */
  67#define nop()                   asm volatile ("nop;\n\t" : : )
  68#define mb()                    asm volatile (""   : : : "memory")
  69#define rmb()                   asm volatile (""   : : : "memory")
  70#define wmb()                   asm volatile (""   : : : "memory")
  71
  72#endif  /* __ASM_NDS_SYSTEM_H */
  73