arch/mips/include/asm/bugs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * This is included by init/main.c to check for architecture-dependent bugs.
   4  *
   5  * Copyright (C) 2007  Maciej W. Rozycki
   6  *
   7  * Needs:
   8  *      void check_bugs(void);
   9  */
  10 #ifndef _ASM_BUGS_H
  11 #define _ASM_BUGS_H
  12
  13 #include <linux/bug.h>
  14 #include <linux/delay.h>
  15 #include <linux/smp.h>
  16
  17 #include <asm/cpu.h>
  18 #include <asm/cpu-info.h>
  19
  20 extern int daddiu_bug;
  21
  22 extern void check_bugs64_early(void);
  23
  24 extern void check_bugs32(void);
  25 extern void check_bugs64(void);
  26
  27 static inline void check_bugs_early(void)
  28 {
  29         if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
  30                 check_bugs64_early();
  31 }
  32
  33 static inline void check_bugs(void)
  34 {
  35         unsigned int cpu = smp_processor_id();
  36
  37         cpu_data[cpu].udelay_val = loops_per_jiffy;
  38         check_bugs32();
  39
  40         if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
  41                 check_bugs64();
  42 }
  43
  44 static inline int r4k_daddiu_bug(void)
  45 {
  46         if (!IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
  47                 return 0;
  48
  49         WARN_ON(daddiu_bug < 0);
  50         return daddiu_bug != 0;
  51 }
  52
  53 #endif /* _ASM_BUGS_H */