diff options
Diffstat (limited to 'arch/arm/mm/fault.h')
| -rw-r--r-- | arch/arm/mm/fault.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h new file mode 100644 index 0000000000..e8f8c19025 --- /dev/null +++ b/arch/arm/mm/fault.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __ARCH_ARM_FAULT_H +#define __ARCH_ARM_FAULT_H + +/* + * Fault status register encodings. We steal bit 31 for our own purposes. + */ +#define FSR_LNX_PF (1 << 31) +#define FSR_CM (1 << 13) +#define FSR_WRITE (1 << 11) +#define FSR_FS4 (1 << 10) +#define FSR_FS3_0 (15) +#define FSR_FS5_0 (0x3f) + +#ifdef CONFIG_ARM_LPAE +#define FSR_FS_AEA 17 +#define FS_TRANS_NOLL 0x4 +#define FS_PERM_NOLL 0xC +#define FS_MMU_NOLL_MASK 0x3C + +static inline int fsr_fs(unsigned int fsr) +{ + return fsr & FSR_FS5_0; +} +#else +#define FSR_FS_AEA 22 +#define FS_L1_TRANS 0x5 +#define FS_L2_TRANS 0x7 +#define FS_L1_PERM 0xD +#define FS_L2_PERM 0xF + +static inline int fsr_fs(unsigned int fsr) +{ + return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6; +} +#endif + +void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs); +void early_abt_enable(void); +asmlinkage void do_DataAbort(unsigned long addr, unsigned int fsr, + struct pt_regs *regs); +asmlinkage void do_PrefetchAbort(unsigned long addr, unsigned int ifsr, + struct pt_regs *regs); + +#endif /* __ARCH_ARM_FAULT_H */ |