arch/nios2/include/asm/system.h

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