arch/nios2/include/asm/system.h

   1 /*
   2  * (C) Copyright 2004, Psyent Corporation <www.psyent.com>
   3  * Scott McNutt <smcnutt@psyent.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7 #ifndef __ASM_NIOS2_SYSTEM_H_
   8 #define __ASM_NIOS2_SYSTEM_H_
   9
  10 #define local_irq_enable() __asm__ __volatile__ (  \
  11         "rdctl  r8, status\n"                      \
  12         "ori    r8, r8, 1\n"                       \
  13         "wrctl  status, r8\n"                      \
  14         : : : "r8")
  15
  16 #define local_irq_disable() __asm__ __volatile__ ( \
  17         "rdctl  r8, status\n"                      \
  18         "andi   r8, r8, 0xfffe\n"                  \
  19         "wrctl  status, r8\n"                      \
  20         : : : "r8")
  21
  22 #define local_save_flags(x) __asm__ __volatile__ (      \
  23         "rdctl  r8, status\n"                           \
  24         "mov    %0, r8\n"                               \
  25         : "=r" (x) : : "r8", "memory")
  26
  27 #define local_irq_restore(x) __asm__ __volatile__ (     \
  28         "mov    r8, %0\n"                               \
  29         "wrctl  status, r8\n"                           \
  30         : : "r" (x) : "r8", "memory")
  31
  32 /* For spinlocks etc */
  33 #define local_irq_save(x) do { local_save_flags(x); local_irq_disable(); } \
  34         while (0)
  35
  36 #define irqs_disabled()                                 \
  37 ({                                                      \
  38         unsigned long flags;                            \
  39         local_save_flags(flags);                        \
  40         ((flags & NIOS2_STATUS_PIE_MSK) == 0x0);        \
  41 })
  42
  43 /* indirect call to go beyond 256MB limitation of toolchain */
  44 #define nios2_callr(addr) __asm__ __volatile__ (        \
  45         "callr  %0"                                     \
  46         : : "r" (addr))
  47
  48 #endif /* __ASM_NIOS2_SYSTEM_H */