arch/arm/include/asm/vdso/cp15.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2020 ARM Ltd.
   4  */
   5 #ifndef __ASM_VDSO_CP15_H
   6 #define __ASM_VDSO_CP15_H
   7
   8 #ifndef __ASSEMBLY__
   9
  10 #ifdef CONFIG_CPU_CP15
  11
  12 #include <linux/stringify.h>
  13
  14 #define __ACCESS_CP15(CRn, Op1, CRm, Op2)       \
  15         "mrc", "mcr", __stringify(p15, Op1, %0, CRn, CRm, Op2), u32
  16 #define __ACCESS_CP15_64(Op1, CRm)              \
  17         "mrrc", "mcrr", __stringify(p15, Op1, %Q0, %R0, CRm), u64
  18
  19 #define __read_sysreg(r, w, c, t) ({                            \
  20         t __val;                                                \
  21         asm volatile(r " " c : "=r" (__val));                   \
  22         __val;                                                  \
  23 })
  24 #define read_sysreg(...)                __read_sysreg(__VA_ARGS__)
  25
  26 #define __write_sysreg(v, r, w, c, t)   asm volatile(w " " c : : "r" ((t)(v)))
  27 #define write_sysreg(v, ...)            __write_sysreg(v, __VA_ARGS__)
  28
  29 #define BPIALL                          __ACCESS_CP15(c7, 0, c5, 6)
  30 #define ICIALLU                         __ACCESS_CP15(c7, 0, c5, 0)
  31
  32 #define CNTVCT                          __ACCESS_CP15_64(1, c14)
  33
  34 #endif /* CONFIG_CPU_CP15 */
  35
  36 #endif /* __ASSEMBLY__ */
  37
  38 #endif /* __ASM_VDSO_CP15_H */