Contributors: 10
Author Tokens Token Proportion Commits Commit Proportion
Russell King 107 36.77% 6 28.57%
Kefeng Wang 74 25.43% 2 9.52%
Catalin Marinas 50 17.18% 2 9.52%
Linus Torvalds (pre-git) 31 10.65% 5 23.81%
Alexander Sverdlin 8 2.75% 1 4.76%
Arnd Bergmann 7 2.41% 1 4.76%
Lucas Stach 6 2.06% 1 4.76%
Linus Torvalds 4 1.37% 1 4.76%
Will Deacon 3 1.03% 1 4.76%
Greg Kroah-Hartman 1 0.34% 1 4.76%
Total 291 21 


/* 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		BIT(31)
#define FSR_CM			BIT(13)
#define FSR_WRITE		BIT(11)

#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

#define FSR_FS5_0		GENMASK(5, 0)

static inline int fsr_fs(unsigned int fsr)
{
	return fsr & FSR_FS5_0;
}

static inline bool is_translation_fault(unsigned int fsr)
{
	int fs = fsr_fs(fsr);

	return (fs & FS_MMU_NOLL_MASK) == FS_TRANS_NOLL;
}

static inline bool is_permission_fault(unsigned int fsr)
{
	int fs = fsr_fs(fsr);

	return (fs & FS_MMU_NOLL_MASK) == FS_PERM_NOLL;
}
#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

#define FSR_FS4			BIT(10)
#define FSR_FS3_0		GENMASK(3, 0)

static inline int fsr_fs(unsigned int fsr)
{
	return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
}

static inline bool is_translation_fault(unsigned int fsr)
{
	int fs = fsr_fs(fsr);

	return fs == FS_L1_TRANS || fs == FS_L2_TRANS;
}

static inline bool is_permission_fault(unsigned int fsr)
{
	int fs = fsr_fs(fsr);

	return fs == FS_L1_PERM || fs == FS_L2_PERM;
}
#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 */