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ecc.h

/*
 *    include/asm-mips/dec/ecc.h
 *
 *    ECC handling logic definitions common to DECstation/DECsystem
 *    5000/200 (KN02), 5000/240 (KN03), 5000/260 (KN05) and
 *    DECsystem 5900 (KN03), 5900/260 (KN05) systems.
 *
 *    Copyright (C) 2003  Maciej W. Rozycki
 *
 *    This program is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU General Public License
 *    as published by the Free Software Foundation; either version
 *    2 of the License, or (at your option) any later version.
 */
#ifndef __ASM_MIPS_DEC_ECC_H
#define __ASM_MIPS_DEC_ECC_H

/*
 * Error Address Register bits.
 * The register is r/wc -- any write clears it.
 */
#define KN0X_EAR_VALID        (1<<31)           /* error data valid, bus IRQ */
#define KN0X_EAR_CPU          (1<<30)           /* CPU/DMA transaction */
#define KN0X_EAR_WRITE        (1<<29)           /* write/read transaction */
#define KN0X_EAR_ECCERR       (1<<28)           /* ECC/timeout or overrun */
#define KN0X_EAR_RES_27       (1<<27)           /* unused */
#define KN0X_EAR_ADDRESS      (0x7ffffff<<0)    /* address involved */

/*
 * Error Syndrome Register bits.
 * The register is frozen when EAR.VALID is set, otherwise it records bits
 * from the last memory read.  The register is r/wc -- any write clears it.
 */
#define KN0X_ESR_VLDHI        (1<<31)           /* error data valid hi word */
#define KN0X_ESR_CHKHI        (0x7f<<24)  /* check bits read from mem */
#define KN0X_ESR_SNGHI        (1<<23)           /* single/double bit error */
#define KN0X_ESR_SYNHI        (0x7f<<16)  /* syndrome from ECC logic */
#define KN0X_ESR_VLDLO        (1<<15)           /* error data valid lo word */
#define KN0X_ESR_CHKLO        (0x7f<<8)   /* check bits read from mem */
#define KN0X_ESR_SNGLO        (1<<7)            /* single/double bit error */
#define KN0X_ESR_SYNLO        (0x7f<<0)   /* syndrome from ECC logic */


#ifndef __ASSEMBLY__

#include <linux/interrupt.h>

struct pt_regs;

extern void dec_ecc_be_init(void);
extern int dec_ecc_be_handler(struct pt_regs *regs, int is_fixup);
extern irqreturn_t dec_ecc_be_interrupt(int irq, void *dev_id);
#endif

#endif /* __ASM_MIPS_DEC_ECC_H */

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