1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * include/asm-mips/dec/ecc.h 4 * 5 * ECC handling logic definitions common to DECstation/DECsystem 6 * 5000/200 (KN02), 5000/240 (KN03), 5000/260 (KN05) and 7 * DECsystem 5900 (KN03), 5900/260 (KN05) systems. 8 * 9 * Copyright (C) 2003 Maciej W. Rozycki 10 */ 11 #ifndef __ASM_MIPS_DEC_ECC_H 12 #define __ASM_MIPS_DEC_ECC_H 13 14 /* 15 * Error Address Register bits. 16 * The register is r/wc -- any write clears it. 17 */ 18 #define KN0X_EAR_VALID (1<<31) /* error data valid, bus IRQ */ 19 #define KN0X_EAR_CPU (1<<30) /* CPU/DMA transaction */ 20 #define KN0X_EAR_WRITE (1<<29) /* write/read transaction */ 21 #define KN0X_EAR_ECCERR (1<<28) /* ECC/timeout or overrun */ 22 #define KN0X_EAR_RES_27 (1<<27) /* unused */ 23 #define KN0X_EAR_ADDRESS (0x7ffffff<<0) /* address involved */ 24 25 /* 26 * Error Syndrome Register bits. 27 * The register is frozen when EAR.VALID is set, otherwise it records bits 28 * from the last memory read. The register is r/wc -- any write clears it. 29 */ 30 #define KN0X_ESR_VLDHI (1<<31) /* error data valid hi word */ 31 #define KN0X_ESR_CHKHI (0x7f<<24) /* check bits read from mem */ 32 #define KN0X_ESR_SNGHI (1<<23) /* single/double bit error */ 33 #define KN0X_ESR_SYNHI (0x7f<<16) /* syndrome from ECC logic */ 34 #define KN0X_ESR_VLDLO (1<<15) /* error data valid lo word */ 35 #define KN0X_ESR_CHKLO (0x7f<<8) /* check bits read from mem */ 36 #define KN0X_ESR_SNGLO (1<<7) /* single/double bit error */ 37 #define KN0X_ESR_SYNLO (0x7f<<0) /* syndrome from ECC logic */ 38 39 40 #ifndef __ASSEMBLY__ 41 42 #include <linux/interrupt.h> 43 44 struct pt_regs; 45 46 extern void dec_ecc_be_init(void); 47 extern int dec_ecc_be_handler(struct pt_regs *regs, int is_fixup); 48 extern irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id); 49 #endif 50 51 #endif /* __ASM_MIPS_DEC_ECC_H */