kn230.c

<B>Digital的Unix操作系统VAX 4.2源码</B>

#ifndef lint
static char *sccsid = "@(#)kn230.c	4.6       (ULTRIX)  4/11/91";
#endif  lint

/************************************************************************
 *									*
 *			Copyright (c) 1990 by				*
 *    	      Digital Equipment Corporation, Maynard, MA		*
 *			All rights reserved.				*
 *									*
 *   This software is furnished under a license and may be used and	*
 *   copied  only  in accordance with the terms of such license and	*
 *   with the  inclusion  of  the  above  copyright  notice.   This	*
 *   software  or  any  other copies thereof may not be provided or	*
 *   otherwise made available to any other person.  No title to and	*
 *   ownership of the software is hereby transferred.			*
 *									*
 *   This software is  derived  from  software  received  from  the	*
 *   University    of   California,   Berkeley,   and   from   Bell	*
 *   Laboratories.  Use, duplication, or disclosure is  subject  to	*
 *   restrictions  under  license  agreements  with  University  of	*
 *   California and with AT&T.						*
 *									*
 *   The information in this software is subject to change  without	*
 *   notice  and should not be construed as a commitment by Digital	*
 *   Equipment Corporation.						*
 *									*
 *   Digital assumes no responsibility for the use  or  reliability	*
 *   of its software on equipment which is not supplied by Digital.	*
 *									*
 ************************************************************************/

/*
 * Modification History: kn230.c
 *
 * 11-Apr-91 -- Paul Grist
 * 	Modified trap and get-SIMM-sizes routines to account for
 *	NVRAM when handling errors.
 *
 * 09 Oct 90 -- Paul Grist
 *      Merge for MM to TI sync-ing of pools.
 *
 * 22 Aug 90 -- Paul Grist
 *      Added support to print out name string of option card
 *      at boot time.
 *
 * 19 Aug 90 -- chet
 *	Changes for presto interface.
 *
 * 05-Aug-90    Paul Grist
 *      Addded support for NVRAM/Prestoserve. Removed most of the debug
 *      code, except for option card debug support, this may prove useful
 *      later.
 *
 * 04-Aug-90	Randall Brown
 *	Added call to spl_init() to intialize spl function pointers and
 *      the intr() function pointer.
 *
 * 16-July-90  	Paul Grist
 *	minor FT2 cleanup/fixes and added include for presto.h for
 *      future NVRAM/presto support.
 *
 * 06-Jun-90    Paul Grist
 *      Complete option card support, add various fixes and cleanup
 *      before FT build. Added reporting of console state. 
 *
 * 06-May-90    Paul Grist
 *      Continue clean up, remove debug stuff, add routine to get the
 *      SIMM memory bank sizes for kn230_isolatepar, and add support to
 *      configure the option card.
 *
 * 24-Apr-90    Paul Grist
 *      Make initial modifications for pass 2
 *
 * 23-Apr-90    Paul Grist
 *      Name change everything from ds5100 to kn230.
 *
 * 13-Apr-90    Paul Grist
 *      Cleanup after first boot, added debug support.
 *
 * 09-Mar-90    Paul Grist
 *      Completed first pass code for MIPSMATE.
 */

#include "../machine/pte.h"
#include "../machine/cpu.h"
#include "../h/param.h"
#include "../h/systm.h"
#include "../h/map.h"
#include "../h/user.h"	       /* gets time.h and debug.h too */
#include "../h/proc.h"
#include "../h/vm.h"
#include "../h/buf.h"
#include "../h/dk.h"
#include "../h/conf.h"
#include "../h/errlog.h"
#include "../h/cmap.h"
#include "../h/cpudata.h"
#include "../h/presto.h"
#include "../machine/fpu.h"
#include "../machine/hwconf.h"
#include "../machine/reg.h"
#include "../machine/mc146818clock.h"
#include "../machine/entrypt.h"
#include "../../machine/common/cpuconf.h"

#define	KN230_LANCE 	0x18000000	/* physical addr of lance registers */
#define KN230_SII   	0x1a000000      /* physical addr of sii registers */
#define	KN230_CLOCK 	0x1d000000	/* phys addr of clock chip */

#define KN230_ICSR	0x1e000000	/* Interrupt control & status reg */
#define	KN230_HALT	0x00004000	/* Set if halt switch is pushed */
#define KN230_WMERR	0x00002000	/* Set on memory write NXM	*/
#define KN230_NIIRQ	0x00001000	/* "1" is lance posting interrupt*/
#define KN230_SCSIRQ	0x00000800	/* "1" is SII posting interrupt*/
#define KN230_EXPIRQ1	0x00000400	/* "1" is expan opt posting interrupt*/
#define KN230_EXPIRQ0	0x00000200	/* "1" is expan opt posting interrupt*/
#define KN230_DZIRQ     0x00000100      /* "1" is console posting interrupt */

#define KN230_LED	0x14000000	/* LED register	*/
#define KN230_LED7	0x00008000	/* "1" turns off led 7	*/
#define KN230_LED6	0x00004000	/* "1" turns off led 6	*/
#define KN230_LED5	0x00002000	/* "1" turns off led 5	*/
#define KN230_LED4	0x00001000	/* "1" turns off led 4	*/
#define KN230_LED3	0x00000800	/* "1" Turns off led 3 and disables
                                         main memory, enables wr to EEPROM */
#define KN230_LED2	0x00000400	/* "1" Turns off led 2 and selects 38.4
                                         baud, "0" selects default 19.2k  */
#define KN230_LED1	0x00000200	/* "1" (read only) means 32M in bank1
                                           "0" means 8M in memory bank 1 */
#define KN230_LED0	0x00000100	/* "1" enables halts-disables reset */

#define KN230_WEAR	0x17000000	/* Write error address register */
#define WEAR_IOPRESENT  0x00000001      /* "1" means no option card present */
#define WEAR_SECURE     0x00000002      /* "1" means system is insecure */

#define KN230_PASSWD    0x1f000244      /* password location */
#define PASSWD_FIELD    0xffffffc0      /* mask out passwd field */
#define PASSWD_FAILS    0x0000000f      /* mask out #of failures */

#define KN230_OID       0x1f00020c      /* option slot ID register */
#define OID_NUMBER_MSK  0x000000ff      /* mask out the ID number */
#define OID_ERR_COUNT   0x0000ff00      /* mask out diag failure count */

#define KN230_DZ0_CSR  0x1c000000      /* DZ0 - Control and status register */
#define KN230_DZ1_CSR  0x15000000      /* DZ1 Control and status */
#define KN230_DZ2_CSR  0x15200000      /* DZ2 Control and status */

#define ESRPKT 1
#define MEMPKT 2

#define ICSR_ADDR    PHYS_TO_K1(KN230_ICSR)   /* virt address of ICSR */
#define LANCE_ADDR   PHYS_TO_K1(KN230_LANCE)  /* virt address of LANCE */
#define LED_ADDR     PHYS_TO_K1(KN230_LED)    /* virt address of LED */
#define WEAR_ADDR    PHYS_TO_K1(KN230_WEAR)   /* virt address of WEAR */
#define OID_ADDR     PHYS_TO_K1(KN230_OID)    /* virt address of OID */
#define PASSWD_ADDR  PHYS_TO_K1(KN230_PASSWD) /* virt address of PASSWD */

/* used to save state of registers for logging */
u_long kn230_esr_icsr;
u_long kn230_esr_leds;
u_long kn230_esr_wear;
u_long kn230_esr_oid;


/*
 * Since there is no vector register and we want non-configured
 * devices and controllers to point to stray(), we will use the
 * general purpose scb to dispatch are interrupts.
 *
 * assign indexes into the scb for the five hardware
 * interrrupts. Use scb locations 100-104.
 *
 */

#define DZ_UART_INDEX 400         /* DZ UART - DZIRQ */
#define EXP0_INDEX    404         /* EXPANSION OPTION - EXPIRQ0 */
#define EXP1_INDEX    408         /* EXPANSION OPTION - EXPIRQ1 */
#define SII_INDEX     412         /* SII (scsi controller) - SCSI IRQ */
#define LANCE_INDEX   416         /* NI (lance) - NIIRQ */

/*
 * These defines, macros, and variables are for memory parity errors.
 * Format of "memreg" for logging memory parity errors.
 *
 */

#define SIMMOFF 28
#define TYPEOFF 26
#define BYTEOFF 25
#define DPOFF 24
#define TCOUNTOFF 16
#define SCOUNTOFF 8
#define HCOUNTOFF 0
#define MEMREGFMT(simm, type, byte, dp, tcount, scount, hcount) \
(simm << SIMMOFF | type << TYPEOFF | byte << BYTEOFF | dp << DPOFF | \
tcount << TCOUNTOFF | scount << SCOUNTOFF | hcount << HCOUNTOFF)

/* 
 * MEMREG is a hand crafted info register (sw) used for error logging 
 *        and handling memory parity errors.
 *  
 *   31   28     26   25    24             16            8            0 
 *   +------+------+------+----+-------------+------------+------------+
 *   | SIMM | TYPE | BYTE | TP | TRANS COUNT | SOFT COUNT | HARD COUNT |
 *   +------+------+------+----+-------------+------------+------------+
 *
 */

#define TRANSINTVL (60*15)	    /* time delta to enable parity logging
                                       is 15 minutes */
int kn230transintvl = TRANSINTVL;   /* global var so we can change it */
int kn230translog = 1;		    /* is trans logging currently enabled */

struct kn230_trans_errcnt {       /* trans parity errors */
        long   trans_last;  	  /* time of most recent trans err */
        long   trans_prev;	  /* time of previous trans err */
} kn230_trans_errcnt = { 0, 0 };

#define TRANSPAR 0x1              /* transient parity error */
#define SOFTPAR  0x2              /* soft parity error */
#define HARDPAR  0x3              /* hard parity error */

#define TEXTPG(pt) ((pt) & CTEXT)
#define SMEMPG(pt) ((pt) & CSMEM)
#define MAXSIMM 8
int tcount[MAXSIMM];			/* # of trans parity errs per simm*/
int scount[MAXSIMM];			/* # of soft errs on each simm */
int hcount[MAXSIMM];			/* # of hard errs on each simm */
int kn230_parityerr = 0;        	/* flag for parity err isolation */
caddr_t vatophys();			/* typedef of functions */
unsigned kn230_isolatepar();
int kn230transenable();

int kn230_memsize;                      /* integer size of system memory */
int kn230_bank1;                        /* integer value size of memory bank */
int kn230_bank2;                        /* integer value size of memory bank */
int kn230_bank3;                        /* integer value size of memory bank */
int kn230_bank4;                        /* integer value size of memory bank */

extern int nMDC;                        /* number of mdc chips in config file*/

/*
 * console and clock external variables
 */

extern u_int printstate;	/* how to print to the console */
extern char *rt_clock_addr;	/* addr of the mc146818clock chip */
extern struct timeval time;	/* the system time */
extern int hz;
extern int tick;
extern int tickadj;
extern int fixtick;		/* set to the number of microsec's that the
				   clock looses per second */
/*
 * option card info structure
 */

struct kn230_option {
  u_int option_id;         /* id# as read from OID register */
  char driver_name[32];    /* driver name as read in configuration file */
  char type;               /* 'D' or 'C',device or controller uba struct*/
  u_int exp0_csr;          /* add of expansion device 0's csr reg*/
  u_int exp1_csr;          /* add of expansion device 1's csr reg*/
  char option_name[64];    /* name string printed at boot time */
};

/*
 * NVRAM/Prestoserve support definitions
 *
 */

#define KN230_NVRAM_DIAG    0x1f000300         /* NVRAM diagnostic register */
#define NVRAM_SIZE          0x000000f0         /* MASK out nvram size bits */
#define KN230_NVRAM_FAILED  0x00000008         /* MASK out fail bit */
#define KN230_NVRAM_PRESENT 0x00000001         /* MASK out present bit */
#define KN230_NVRAM_RO      0x00000002         /* read only test failed */
#define KN230_NVRAM_RW      0x00000004         /* read/write test failed */

#define KN230_NVRAM_LOCATION  0x1f000304       /* NVRAM location register */

#define KN230_NVRAM_BKILL    0x00000002       /* status reg mask for bkill */
#define KN230_NVRAM_BFAIL    0x00000001       /* status reg mask for bfail */

#define NVRAM_DIAG           PHYS_TO_K1(KN230_NVRAM_DIAG)
#define NVRAM_LOCATION       PHYS_TO_K1(KN230_NVRAM_LOCATION)

volatile unsigned int kn230_nvram_estatus;      /* even status reg addr*/
volatile unsigned int kn230_nvram_ostatus;      /* odd status reg addr*/
volatile unsigned int kn230_nvram_econtrol;     /* even control reg addr*/
volatile unsigned int kn230_nvram_ocontrol;     /* even control reg addr*/
volatile unsigned int kn230_nvram_location;     /* nvram start addr value*/
unsigned kn230_nvram_start_addr;                /* adjusted start value*/
unsigned kn230_nvram_size;                      /* adjusted size value*/



/*****************************************************************************
 *
 * Interrupt handlers for the 6 hardware interrupts and 2 software
 * interrupts for MIPSMATE.
 *
 *****************************************************************************/

extern softclock(),softnet(),kn230_hardintr1(),kn230_hardintr0(),
	hardclock(), fpuintr(),kn230_memintr(),kn230_haltintr();


/* The routines that correspond to each of the 8 interrupt lines */
int (*kn230intr_vec[IPLSIZE])() = {
	softclock,		/* softint 0    SOFTCLOCK */
	softnet,		/* softint 1	NET */
	kn230_hardintr0,	/* hardint 0    DZ UART, IO EXPANSION */
	kn230_hardintr1,        /* hardint 1	LANCE, SII */
	hardclock,	        /* hardint 2	TOY */
	kn230_memintr,          /* hardint 3	Write Mem NXM */
	kn230_haltintr,	        /* hardint 4	HALT */
	fpuintr			/* hardint 5	FPU */
};

/*
 * The masks to use to look at each of the 8 interrupt lines.
 *
 */
int kn230iplmask[IPLSIZE] = {
        SR_IMASK1|SR_IEC,              /* softintr0 - SOFTCLOCK */
	SR_IMASK2|SR_IEC,              /* softintr1 - NET */
	SR_IMASK3|SR_IEC,              /* hardintr0 - DZ UART, IO EXPANSION */
	SR_IMASK4|SR_IEC,              /* hardintr1 - LANCE, SII */
	SR_IMASK5|SR_IEC,              /* hardintr2 - TOY */
	SR_IMASK6|SR_IEC,              /* hardintr3 - WRITE MEM NXM */
	SR_IMASK7|SR_IEC,              /* hardintr4 - HALT */
	SR_IMASK8|SR_IEC               /* hardintr5 - FPU */
};

/*
 * The SR reg masks for splxxx usage. See the defines in cpu.h.
 */

#define SR_HALT 0x4000                 /*  halt is hardint 4 */

int kn230splm[SPLMSIZE] = {
	SR_IEC | SR_IMASK0 | SR_HALT,	          /* 0 SPLNONE */
	SR_IEC | SR_IMASK1 | SR_HALT,             /* 1 SPLSOFTC	*/
	SR_IEC | SR_IMASK2 | SR_HALT,	          /* 2 SPLNET */
	0,				          /* 3 NOT_USED */
	0,			                  /* 4 NOT_USED */
	SR_IEC | SR_IMASK4 | SR_HALT,             /* 5 SPLBIO,SPLIMP,SPLTTY */
	SR_IEC | SR_IMASK5 | SR_HALT,	          /* 6 SPLCLOCK	*/
	SR_IEC | SR_IMASK6 | SR_HALT,	          /* 7 SPLMEM */
	SR_IEC | SR_IMASK8 | SR_HALT,	          /* 8 SPLFPU */
};

/*****************************************************************************
 * 
 * kn230_init(): Initialization routine for kn230 processor (MIPSMATE)
 *
 *                - initialize interrupt dispatch table: c0vec_tbl
 *                - initialize spl table: splm
 *                - initialize interrupt mask table: splm
 *                - direct lance interrupts to kn230_lance()
 *                - change from console trap handling to kernel trap handling
 *                - set up clock values
 *
 *****************************************************************************/

kn230_init()
{
	extern int c0vec_tblsize;
	extern int (*c0vec_tbl[])();
	extern int iplmask[];
	extern int splm[];
	extern struct cpusw *cpup;
	extern int (*(scb[])) ();

	/*
	 * Initialize the interrupt dispatch table c0vec_tbl.
	 * Initialize the spl table for the system we are running on.
	 * Initialize the interrupt masks for the system we are running on.
	 * This must be done very early on at boot time and must
	 * be done before any interrupt (or spl) is allowed.
	 */
	bcopy((int *)kn230intr_vec, c0vec_tbl, c0vec_tblsize);
	bcopy(kn230iplmask, iplmask, IPLSIZE * sizeof(int));
	bcopy(kn230splm, splm, (SPLMSIZE) * sizeof(int));

	/* Initialize the spl dispatch table and the intr dispatch routine */
	spl_init();

	/* 
	 * change over from console to kernel trap handling; this is
	 * done by changing the BEV bit in the status register.
         */
	clear_bev();

	/*
	 * Set up the system specific value for "hz", the number of clock
	 * interrupts per second; and corresponding tick and tickadj values.
         * These values will be used by hardclock. HZ=256 for mc146818
	 */
	hz = cpup->HZ;
	tick = 1000000 / hz;
	tickadj = 240000 / (60 * hz);
	fixtick = 1000000 - (tick * hz);     

	/*
	 * Assign the rt_clock_addr for this processor
	 */

	rt_clock_addr = (char *)PHYS_TO_K1(KN230_CLOCK);

	return (0);

}

/************************************************************************
 * 
 * kn230_conf:     Configuration routine for MIPSMATE
 *
 *                  - set up PROM environment entries
 *                  - set up FPU ; turn on interrupts
 *                  - configure system devices and controllers
 *                  - enable logging of transient parity errors
 *                  - report the state of the halt/reset button
 *
 ************************************************************************/

kn230_conf()
{
	extern int cold;
	extern unsigned cpu_systype;
	extern int cpu;			/* ULTRIX internal System type */
	extern int kn230_turn_nvram_on;

	cold = 1;