arch/arm/mm/fault.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __ARCH_ARM_FAULT_H
   3 #define __ARCH_ARM_FAULT_H
   4
   5 /*
   6  * Fault status register encodings.  We steal bit 31 for our own purposes.
   7  */
   8 #define FSR_LNX_PF              (1 << 31)
   9 #define FSR_CM                  (1 << 13)
  10 #define FSR_WRITE               (1 << 11)
  11 #define FSR_FS4                 (1 << 10)
  12 #define FSR_FS3_0               (15)
  13 #define FSR_FS5_0               (0x3f)
  14
  15 #ifdef CONFIG_ARM_LPAE
  16 #define FSR_FS_AEA              17
  17 #define FS_TRANS_NOLL           0x4
  18 #define FS_PERM_NOLL            0xC
  19 #define FS_MMU_NOLL_MASK        0x3C
  20
  21 static inline int fsr_fs(unsigned int fsr)
  22 {
  23         return fsr & FSR_FS5_0;
  24 }
  25 #else
  26 #define FSR_FS_AEA              22
  27 #define FS_L1_TRANS             0x5
  28 #define FS_L2_TRANS             0x7
  29 #define FS_L1_PERM              0xD
  30 #define FS_L2_PERM              0xF
  31
  32 static inline int fsr_fs(unsigned int fsr)
  33 {
  34         return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
  35 }
  36 #endif
  37
  38 void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
  39 void early_abt_enable(void);
  40 asmlinkage void do_DataAbort(unsigned long addr, unsigned int fsr,
  41                              struct pt_regs *regs);
  42 asmlinkage void do_PrefetchAbort(unsigned long addr, unsigned int ifsr,
  43                                  struct pt_regs *regs);
  44
  45 #endif  /* __ARCH_ARM_FAULT_H */