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

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