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 BIT(31) 9 #define FSR_CM BIT(13) 10 #define FSR_WRITE BIT(11) 11 12 #ifdef CONFIG_ARM_LPAE 13 #define FSR_FS_AEA 17 14 #define FS_TRANS_NOLL 0x4 15 #define FS_PERM_NOLL 0xC 16 #define FS_MMU_NOLL_MASK 0x3C 17 18 #define FSR_FS5_0 GENMASK(5, 0) 19 fsr_fs(unsigned int fsr)20static inline int fsr_fs(unsigned int fsr) 21 { 22 return fsr & FSR_FS5_0; 23 } 24 is_translation_fault(unsigned int fsr)25static inline bool is_translation_fault(unsigned int fsr) 26 { 27 int fs = fsr_fs(fsr); 28 29 return (fs & FS_MMU_NOLL_MASK) == FS_TRANS_NOLL; 30 } 31 is_permission_fault(unsigned int fsr)32static inline bool is_permission_fault(unsigned int fsr) 33 { 34 int fs = fsr_fs(fsr); 35 36 return (fs & FS_MMU_NOLL_MASK) == FS_PERM_NOLL; 37 } 38 #else 39 #define FSR_FS_AEA 22 40 #define FS_L1_TRANS 0x5 41 #define FS_L2_TRANS 0x7 42 #define FS_L1_PERM 0xD 43 #define FS_L2_PERM 0xF 44 45 #define FSR_FS4 BIT(10) 46 #define FSR_FS3_0 GENMASK(3, 0) 47 fsr_fs(unsigned int fsr)48static inline int fsr_fs(unsigned int fsr) 49 { 50 return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6; 51 } 52 is_translation_fault(unsigned int fsr)53static inline bool is_translation_fault(unsigned int fsr) 54 { 55 int fs = fsr_fs(fsr); 56 57 return fs == FS_L1_TRANS || fs == FS_L2_TRANS; 58 } 59 is_permission_fault(unsigned int fsr)60static inline bool is_permission_fault(unsigned int fsr) 61 { 62 int fs = fsr_fs(fsr); 63 64 return fs == FS_L1_PERM || fs == FS_L2_PERM; 65 } 66 #endif 67 68 void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs); 69 void early_abt_enable(void); 70 asmlinkage void do_DataAbort(unsigned long addr, unsigned int fsr, 71 struct pt_regs *regs); 72 asmlinkage void do_PrefetchAbort(unsigned long addr, unsigned int ifsr, 73 struct pt_regs *regs); 74 75 #endif /* __ARCH_ARM_FAULT_H */ 76