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/*
 * Copyright (c) 1986, 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	@(#)ka860.c	7.2 (Berkeley) 7/9/88
 */

#if VAX8600

/*
 * VAX 8600 specific routines.
 */

#include "param.h"

#include "cpu.h"
#include "mtpr.h"

/*
 * 8600 memory register (MERG) bit definitions
 */
#define	M8600_ICRD	0x400		/* inhibit crd interrupts */
#define M8600_TB_ERR	0xf00		/* translation buffer error mask */

/*
 * MDECC register
 */
#define	M8600_ADDR_PE	0x080000	/* address parity error */
#define M8600_DBL_ERR	0x100000	/* data double bit error */
#define	M8600_SNG_ERR	0x200000	/* data single bit error */
#define	M8600_BDT_ERR	0x400000	/* bad data error */

/*
 * ESPA register is used to address scratch pad registers in the Ebox.
 * To access a register in the scratch pad, write the ESPA with the address
 * and then read the ESPD register.  
 *
 * NOTE:  In assmebly code, the mfpr instruction that reads the ESPD
 *	  register must immedately follow the mtpr instruction that setup
 *	  the ESPA register -- per the VENUS processor register spec.
 *
 * The scratchpad registers that are supplied for a single bit ECC 
 * error are:
 */
#define	SPAD_MSTAT1	0x25		/* scratch pad mstat1 register	*/
#define SPAD_MSTAT2	0x26		/* scratch pad mstat2 register	*/
#define SPAD_MDECC	0x27		/* scratch pad mdecc register	*/
#define SPAD_MEAR	0x2a		/* scratch pad mear register	*/

#define M8600_MEMERR(mdecc) ((mdecc) & 0x780000)
#define M8600_HRDERR(mdecc) ((mdecc) & 0x580000)
#define M8600_SYN(mdecc) (((mdecc) >> 9) & 0x3f)
#define M8600_ADDR(mear) ((mear) & 0x3ffffffc)
#define M8600_ARRAY(mear) (((mear) >> 22) & 0x0f)

#define M8600_MDECC_BITS \
"\20\27BAD_DT_ERR\26SNG_BIT_ERR\25DBL_BIT_ERR\24ADDR_PE"

#define M8600_MSTAT1_BITS "\20\30CPR_PE_A\27CPR_PE_B\26ABUS_DT_PE\
\25ABUS_CTL_MSK_PE\24ABUS_ADR_PE\23ABUS_C/A_CYCLE\22ABUS_ADP_1\21ABUS_ADP_0\
\20TB_MISS\17BLK_HIT\16C0_TAG_MISS\15CHE_MISS\14TB_VAL_ERR\13TB_PTE_B_PE\
\12TB_PTE_A_PE\11TB_TAG_PE\10WR_DT_PE_B3\7WR_DT_PE_B2\6WR_DT_PE_B1\
\5WR_DT_PE_B0\4CHE_RD_DT_PE\3CHE_SEL\2ANY_REFL\1CP_BW_CHE_DT_PE"

#define M8600_MSTAT2_BITS "\20\20CP_BYT_WR\17ABUS_BD_DT_CODE\10MULT_ERR\
\7CHE_TAG_PE\6CHE_TAG_W_PE\5CHE_WRTN_BIT\4NXM\3CP-IO_BUF_ERR\2MBOX_LOCK"

/* enable CRD reports */
ka860_memenable()
{

	mtpr(MERG, mfpr(MERG) & ~M8600_ICRD);
}

/* log CRD errors */
ka860_memerr()
{
	register int reg11;	/* known to be r11 below */
	int mdecc, mear, mstat1, mstat2, array;

	/*
	 * Scratchpad registers in the Ebox must be read by
	 * storing their ID number in ESPA and then immediately
	 * reading ESPD's contents with no other intervening
	 * machine instructions!
	 *
	 * The asm's below have a number of constants which
	 * are defined correctly above and in mtpr.h.
	 */
#ifdef lint
	reg11 = 0;
#else
	asm("mtpr $0x27,$0x4e; mfpr $0x4f,r11");
#endif
	mdecc = reg11;	/* must acknowledge interrupt? */
	if (M8600_MEMERR(mdecc)) {
		asm("mtpr $0x2a,$0x4e; mfpr $0x4f,r11");
		mear = reg11;
		asm("mtpr $0x25,$0x4e; mfpr $0x4f,r11");
		mstat1 = reg11;
		asm("mtpr $0x26,$0x4e; mfpr $0x4f,r11");
		mstat2 = reg11;
		array = M8600_ARRAY(mear);

		printf("mcr0: ecc error, addr %x (array %d) syn %x\n",
			M8600_ADDR(mear), array, M8600_SYN(mdecc));
		printf("\tMSTAT1 = %b\n\tMSTAT2 = %b\n",
			    mstat1, M8600_MSTAT1_BITS,
			    mstat2, M8600_MSTAT2_BITS);
		mtpr(EHSR, 0);
		mtpr(MERG, mfpr(MERG) | M8600_ICRD);
	}
}

#define NMC8600	7
char *mc8600[] = {
	"unkn type",	"fbox error",	"ebox error",	"ibox error",
	"mbox error",	"tbuf error",	"mbox 1D error"
};
/* codes for above */
#define	MC_FBOX		1
#define	MC_EBOX		2
#define	MC_IBOX		3
#define	MC_MBOX		4
#define	MC_TBUF		5
#define	MC_MBOX1D	6

/* error bits */
#define	MBOX_FE		0x8000		/* Mbox fatal error */
#define	FBOX_SERV	0x10000000	/* Fbox service error */
#define	IBOX_ERR	0x2000		/* Ibox error */
#define	EBOX_ERR	0x1e00		/* Ebox error */
#define	MBOX_1D		0x81d0000	/* Mbox 1D error */
#define EDP_PE		0x200

struct mc8600frame {
	int	mc86_bcnt;		/* byte count == 0x58 */
	int	mc86_ehmsts;
	int	mc86_evmqsav;
	int	mc86_ebcs;
	int	mc86_edpsr;
	int	mc86_cslint;
	int	mc86_ibesr;
	int	mc86_ebxwd1;
	int	mc86_ebxwd2;
	int	mc86_ivasav;
	int	mc86_vibasav;
	int	mc86_esasav;
	int	mc86_isasav;
	int	mc86_cpc;
	int	mc86_mstat1;
	int	mc86_mstat2;
	int	mc86_mdecc;
	int	mc86_merg;
	int	mc86_cshctl;
	int	mc86_mear;
	int	mc86_medr;
	int	mc86_accs;
	int	mc86_cses;
	int	mc86_pc;		/* trapped pc */
	int	mc86_psl;		/* trapped psl */
};

/* machine check */
ka860_mchk(cmcf)
	caddr_t cmcf;
{
	register struct mc8600frame *mcf = (struct mc8600frame *)cmcf;
	register int type;

	if (mcf->mc86_ebcs & MBOX_FE)
		mcf->mc86_ehmsts |= MC_MBOX;
	else if (mcf->mc86_ehmsts & FBOX_SERV)
		mcf->mc86_ehmsts |= MC_FBOX;
	else if (mcf->mc86_ebcs & EBOX_ERR) {
		if (mcf->mc86_ebcs & EDP_PE)
			mcf->mc86_ehmsts |= MC_MBOX;
		else
			mcf->mc86_ehmsts |= MC_EBOX;
	} else if (mcf->mc86_ehmsts & IBOX_ERR)
		mcf->mc86_ehmsts |= MC_IBOX;
	else if (mcf->mc86_mstat1 & M8600_TB_ERR)
		mcf->mc86_ehmsts |= MC_TBUF;
	else if ((mcf->mc86_cslint & MBOX_1D) == MBOX_1D)
		mcf->mc86_ehmsts |= MC_MBOX1D;

	type = mcf->mc86_ehmsts & 0x7;
	printf("machine check %x: %s\n", type,
	    type < NMC8600 ? mc8600[type] : "???");
	printf("\tehm.sts %x evmqsav %x ebcs %x edpsr %x cslint %x\n",
	    mcf->mc86_ehmsts, mcf->mc86_evmqsav, mcf->mc86_ebcs,
	    mcf->mc86_edpsr, mcf->mc86_cslint);
	printf("\tibesr %x ebxwd %x %x ivasav %x vibasav %x\n",
	    mcf->mc86_ibesr, mcf->mc86_ebxwd1, mcf->mc86_ebxwd2,
	    mcf->mc86_ivasav, mcf->mc86_vibasav);
	printf("\tesasav %x isasav %x cpc %x mstat %x %x mdecc %x\n",
	    mcf->mc86_esasav, mcf->mc86_isasav, mcf->mc86_cpc,
	    mcf->mc86_mstat1, mcf->mc86_mstat2, mcf->mc86_mdecc);
	printf("\tmerg %x cshctl %x mear %x medr %x accs %x cses %x\n",
	    mcf->mc86_merg, mcf->mc86_cshctl, mcf->mc86_mear,
	    mcf->mc86_medr, mcf->mc86_accs, mcf->mc86_cses);
	printf("\tpc %x psl %x\n", mcf->mc86_pc, mcf->mc86_psl);
	mtpr(EHSR, 0);
	return (MCHK_PANIC);
}
#endif