arch/score/include/asm/irqflags.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_SCORE_IRQFLAGS_H
   3 #define _ASM_SCORE_IRQFLAGS_H
   4
   5 #ifndef __ASSEMBLY__
   6
   7 #include <linux/types.h>
   8
   9 static inline unsigned long arch_local_save_flags(void)
  10 {
  11         unsigned long flags;
  12
  13         asm volatile(
  14                 "       mfcr    r8, cr0         \n"
  15                 "       nop                     \n"
  16                 "       nop                     \n"
  17                 "       mv      %0, r8          \n"
  18                 "       nop                     \n"
  19                 "       nop                     \n"
  20                 "       nop                     \n"
  21                 "       nop                     \n"
  22                 "       nop                     \n"
  23                 "       ldi     r9, 0x1         \n"
  24                 "       and     %0, %0, r9      \n"
  25                 : "=r" (flags)
  26                 :
  27                 : "r8", "r9");
  28         return flags;
  29 }
  30
  31 static inline unsigned long arch_local_irq_save(void)
  32 {
  33         unsigned long flags;
  34
  35         asm volatile(
  36                 "       mfcr    r8, cr0         \n"
  37                 "       li      r9, 0xfffffffe  \n"
  38                 "       nop                     \n"
  39                 "       mv      %0, r8          \n"
  40                 "       and     r8, r8, r9      \n"
  41                 "       mtcr    r8, cr0         \n"
  42                 "       nop                     \n"
  43                 "       nop                     \n"
  44                 "       nop                     \n"
  45                 "       nop                     \n"
  46                 "       nop                     \n"
  47                 : "=r" (flags)
  48                 :
  49                 : "r8", "r9", "memory");
  50
  51         return flags;
  52 }
  53
  54 static inline void arch_local_irq_restore(unsigned long flags)
  55 {
  56         asm volatile(
  57                 "       mfcr    r8, cr0         \n"
  58                 "       ldi     r9, 0x1         \n"
  59                 "       and     %0, %0, r9      \n"
  60                 "       or      r8, r8, %0      \n"
  61                 "       mtcr    r8, cr0         \n"
  62                 "       nop                     \n"
  63                 "       nop                     \n"
  64                 "       nop                     \n"
  65                 "       nop                     \n"
  66                 "       nop                     \n"
  67                 :
  68                 : "r"(flags)
  69                 : "r8", "r9", "memory");
  70 }
  71
  72 static inline void arch_local_irq_enable(void)
  73 {
  74         asm volatile(
  75                 "       mfcr    r8,cr0          \n"
  76                 "       nop                     \n"
  77                 "       nop                     \n"
  78                 "       ori     r8,0x1          \n"
  79                 "       mtcr    r8,cr0          \n"
  80                 "       nop                     \n"
  81                 "       nop                     \n"
  82                 "       nop                     \n"
  83                 "       nop                     \n"
  84                 "       nop                     \n"
  85                 :
  86                 :
  87                 : "r8", "memory");
  88 }
  89
  90 static inline void arch_local_irq_disable(void)
  91 {
  92         asm volatile(
  93                 "       mfcr    r8,cr0          \n"
  94                 "       nop                     \n"
  95                 "       nop                     \n"
  96                 "       srli    r8,r8,1         \n"
  97                 "       slli    r8,r8,1         \n"
  98                 "       mtcr    r8,cr0          \n"
  99                 "       nop                     \n"
 100                 "       nop                     \n"
 101                 "       nop                     \n"
 102                 "       nop                     \n"
 103                 "       nop                     \n"
 104                 :
 105                 :
 106                 : "r8", "memory");
 107 }
 108
 109 static inline bool arch_irqs_disabled_flags(unsigned long flags)
 110 {
 111         return !(flags & 1);
 112 }
 113
 114 static inline bool arch_irqs_disabled(void)
 115 {
 116         return arch_irqs_disabled_flags(arch_local_save_flags());
 117 }
 118
 119 #endif /* __ASSEMBLY__ */
 120
 121 #endif /* _ASM_SCORE_IRQFLAGS_H */