xref: /openbmc/linux/arch/arm/mm/fault.h (revision 35d4a3c6)
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  
41  #endif	/* __ARCH_ARM_FAULT_H */
42