1 files changed, 41 insertions, 0 deletions
diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h
new file mode 100644
index 000000000..54927ba1f
--- /dev/null
+++ b/arch/arm/mm/fault.h
@@ -0,0 +1,41 @@
+/* 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);
+
+#endif	/* __ARCH_ARM_FAULT_H */