VAX/vax780_defs.h

/* vax780_defs.h: VAX 780 model-specific definitions file

   Copyright (c) 2004, Robert M Supnik

   Permission is hereby granted, free of charge, to any person obtaining a
   copy of this software and associated documentation files (the "Software"),
   to deal in the Software without restriction, including without limitation
   the rights to use, copy, modify, merge, publish, distribute, sublicense,
   and/or sell copies of the Software, and to permit persons to whom the
   Software is furnished to do so, subject to the following conditions:

   The above copyright notice and this permission notice shall be included in
   all copies or substantial portions of the Software.

   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   ROBERT M SUPNIK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
   IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
   CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

   Except as contained in this notice, the name of Robert M Supnik shall not
   be used in advertising or otherwise to promote the sale, use or other dealings
   in this Software without prior written authorization from Robert M Supnik.

   This file covers the VAX 11/780, the first VAX.

   System memory map

	0000 0000 - 1FFF FFFF		main memory

	2000 0000 - 2001 FFFF		nexus register space
	2002 0000 - 200F FFFF		reserved
	2010 0000 - 2013 FFFF		Unibus address space, Unibus 0
	2014 0000 - 2017 FFFF		Unibus address space, Unibus 1
	2018 0000 - 201B FFFF		Unibus address space, Unibus 2
	201C 0000 - 201F FFFF		Unibus address space, Unibus 3
	2020 0000 - 3FFF FFFF		reserved
*/

/* Microcode constructs */

#ifndef FULL_VAX
#define FULL_VAX	1
#endif

#ifndef _VAX_780_DEFS_H_
#define _VAX_780_DEFS_H_	1

#define VAX780_SID	(1 << 24)			/* system ID */
#define VAX780_ECO	(7 << 19)			/* ucode revision */
#define VAX780_PLANT	(0 << 12)			/* plant (Salem NH) */
#define VAX780_SN	(1234)
#define CON_HLTPIN	0x0200				/* external CPU halt */
#define CON_PWRUP	0x0300				/* powerup code */
#define CON_HLTINS	0x0600				/* HALT instruction */
#define MCHK_RD_F	0x00				/* read fault */
#define MCHK_RD_A	0xF4				/* read abort */
#define MCHK_IBUF	0x0D				/* read istream */

/* Interrupts */

#define IPL_HMAX	0x17				/* highest hwre level */
#define IPL_HMIN	0x14				/* lowest hwre level */
#define IPL_HLVL	(IPL_HMAX - IPL_HMIN + 1)	/* # hardware levels */
#define IPL_SMAX	0xF				/* highest swre level */

/* Nexus constants */

#define NEXUS_NUM	16				/* number of nexus */
#define MCTL_NUM	2				/* number of mem ctrl */
#define MBA_NUM		2				/* number of MBA's */
#define TR_MCTL0	1				/* nexus assignments */
#define TR_MCTL1	2
#define TR_UBA		3
#define TR_MBA0		8
#define TR_MBA1		9
#define NEXUS_HLVL	(IPL_HMAX - IPL_HMIN + 1)
#define SCB_NEXUS	0x100				/* nexus intr base */
#define SBI_FAULTS	0xFC000000			/* SBI fault flags - ni */

/* Internal I/O interrupts - relative except for clock and console */

#define IPL_CLKINT	0x18				/* clock IPL */
#define IPL_TTINT	0x14				/* console IPL */

#define IPL_MCTL0	(0x15 - IPL_HMIN)
#define IPL_MCTL1	(0x15 - IPL_HMIN)
#define IPL_UBA		(0x15 - IPL_HMIN)
#define IPL_MBA0	(0x15 - IPL_HMIN)
#define IPL_MBA1	(0x15 - IPL_HMIN)

/* Nexus interrupt macros */

#define SET_NEXUS_INT(dv)	nexus_req[IPL_##dv] |= (1 << TR_##dv)
#define CLR_NEXUS_INT(dv)	nexus_req[IPL_##dv] &= ~(1 << TR_##dv)

/* Machine specific IPRs */

#define MT_ACCS		40				/* FPA control */
#define MT_ACCR		41				/* FPA maint */
#define MT_WCSA		44				/* WCS address */
#define MT_WCSD		45				/* WCS data */
#define MT_SBIFS	48				/* SBI fault status */
#define MT_SBIS		49				/* SBI silo */
#define MT_SBISC	50				/* SBI silo comparator */
#define MT_SBIMT	51				/* SBI maint */
#define MT_SBIER	52				/* SBI error */
#define MT_SBITA	53				/* SBI timeout addr */
#define MT_SBIQC	54				/* SBI timeout clear */
#define MT_MBRK		60				/* microbreak */

/* Memory */

#define MAXMEMWIDTH	23				/* max mem, MS780C */
#define MAXMEMSIZE	(1 << MAXMEMWIDTH)
#define MAXMEMWIDTH_X	27				/* max mem, MS780E */
#define MAXMEMSIZE_X	(1 << MAXMEMWIDTH_X)
#define INITMEMSIZE	(1 << MAXMEMWIDTH)		/* initial memory size */
#define MEMSIZE		(cpu_unit.capac)
#define ADDR_IS_MEM(x)	(((uint32) (x)) < MEMSIZE)

/* Unibus I/O registers */

#define UBADDRWIDTH	18				/* Unibus addr width */
#define UBADDRSIZE	(1u << UBADDRWIDTH)		/* Unibus addr length */
#define UBADDRMASK	(UBADDRSIZE - 1)		/* Unibus addr mask */
#define IOPAGEAWIDTH	13				/* IO addr width */
#define IOPAGESIZE	(1u << IOPAGEAWIDTH)		/* IO page length */
#define IOPAGEMASK	(IOPAGESIZE - 1)		/* IO addr mask */
#define UBADDRBASE	0x20100000			/* Unibus addr base */
#define IOPAGEBASE	0x2013E000			/* IO page base */
#define ADDR_IS_IO(x)	((((uint32) (x)) >= UBADDRBASE) && \
			 (((uint32) (x)) < (UBADDRBASE + UBADDRSIZE)))
#define ADDR_IS_IOP(x)	(((uint32) (x)) >= IOPAGEBASE)

/* Nexus register space */

#define REGAWIDTH	17				/* REG addr width */
#define REG_V_NEXUS	13				/* nexus number */
#define REG_M_NEXUS	0xF
#define REG_V_OFS	2				/* register number */
#define REG_M_OFS	0x7FF	
#define REGSIZE		(1u << REGAWIDTH)		/* REG length */
#define REGBASE		0x20000000			/* REG addr base */
#define ADDR_IS_REG(x)	((((uint32) (x)) >= REGBASE) && \
			 (((uint32) (x)) < (REGBASE + REGSIZE)))
#define NEXUS_GETNEX(x)	(((x) >> REG_V_NEXUS) & REG_M_NEXUS)
#define NEXUS_GETOFS(x)	(((x) >> REG_V_OFS) & REG_M_OFS)

/* ROM address space in memory controllers */

#define ROMAWIDTH	12				/* ROM addr width */
#define ROMSIZE		(1u << ROMAWIDTH)		/* ROM size */
#define ROM0BASE	(REGBASE + (TR_MCTL0 << REG_V_NEXUS) + 0x1000)
#define ROM1BASE	(REGBASE + (TR_MCTL1 << REG_V_NEXUS) + 0x1000)
#define ADDR_IS_ROM0(x)	((((uint32) (x)) >= ROM0BASE) && \
			 (((uint32) (x)) < (ROM0BASE + ROMSIZE)))
#define ADDR_IS_ROM1(x)	((((uint32) (x)) >= ROM1BASE) && \
			 (((uint32) (x)) < (ROM1BASE + ROMSIZE)))
#define ADDR_IS_ROM(x)	(ADDR_IS_ROM0 (x) || ADDR_IS_ROM1 (x))

/* Other address spaces */

#define ADDR_IS_CDG(x)	(0)
#define ADDR_IS_NVR(x)	(0)

/* Unibus I/O modes */

#define READ		0				/* PDP-11 compatibility */
#define WRITE		(L_WORD)
#define WRITEB		(L_BYTE)

/* Common CSI flags */

#define CSR_V_GO	0				/* go */
#define CSR_V_IE	6				/* interrupt enable */
#define CSR_V_DONE	7				/* done */
#define CSR_V_BUSY	11				/* busy */
#define CSR_V_ERR	15				/* error */
#define CSR_GO		(1u << CSR_V_GO)
#define CSR_IE		(1u << CSR_V_IE)
#define CSR_DONE	(1u << CSR_V_DONE)
#define CSR_BUSY	(1u << CSR_V_BUSY)
#define CSR_ERR		(1u << CSR_V_ERR)

/* Timers */

#define TMR_CLK		0				/* 100Hz clock */

/* I/O system definitions */

#define DZ_MUXES	4				/* max # of DZV muxes */
#define DZ_LINES	8				/* lines per DZV mux */
#define VH_MUXES	4				/* max # of DHQ muxes */
#define MT_MAXFR	(1 << 16)			/* magtape max rec */
#define AUTO_LNT	34				/* autoconfig ranks */
#define DIB_MAX		100				/* max DIBs */

#define DEV_V_UBUS	(DEV_V_UF + 0)			/* Unibus */
#define DEV_V_MBUS	(DEV_V_UF + 1)			/* Massbus */
#define DEV_V_NEXUS	(DEV_V_UF + 2)			/* Nexus */
#define DEV_V_FLTA	(DEV_V_UF + 3)			/* flt addr */
#define DEV_V_FFUF	(DEV_V_UF + 4)			/* first free flag */
#define DEV_UBUS	(1u << DEV_V_UBUS)
#define DEV_MBUS	(1u << DEV_V_MBUS)
#define DEV_NEXUS	(1u << DEV_V_NEXUS)
#define DEV_FLTA	(1u << DEV_V_FLTA)
#define DEV_QBUS	(0)
#define DEV_Q18		(0)

#define UNIBUS		TRUE				/* Unibus only */

#define DEV_RDX		16				/* default device radix */

/* Device information block 

   For Massbus devices,
	ba	=	Massbus number
	lnt	=	Massbus ctrl type
	ack[0]	=	abort routine

   For Nexus devices,
	ba	=	Nexus number
	lnt	=	number of consecutive nexi */

#define VEC_DEVMAX	4				/* max device vec */

struct pdp_dib {
	uint32		ba;				/* base addr */
	uint32		lnt;				/* length */
	t_stat		(*rd)(int32 *dat, int32 ad, int32 md);
	t_stat		(*wr)(int32 dat, int32 ad, int32 md);
	int32		vnum;				/* vectors: number */
	int32		vloc;				/* locator */
	int32		vec;				/* value */
	int32		(*ack[VEC_DEVMAX])(void);	/* ack routine */
};

typedef struct pdp_dib DIB;

/* Unibus I/O page layout - XUB,RQB,RQC,RQD float based on number of DZ's
   Massbus devices (RP, TU) do not appear in the Unibus IO page */

#define IOBA_DZ		(IOPAGEBASE + 000100)		/* DZ11 */
#define IOLN_DZ		010
#define IOBA_XUB	(IOPAGEBASE + 000330 + (020 * (DZ_MUXES / 2)))
#define IOLN_XUB	010
#define IOBA_RQB	(IOPAGEBASE + 000334 +  (020 * (DZ_MUXES / 2)))
#define IOLN_RQB	004
#define IOBA_RQC	(IOPAGEBASE + IOBA_RQB + IOLN_RQB)
#define IOLN_RQC	004
#define IOBA_RQD	(IOPAGEBASE + IOBA_RQC + IOLN_RQC)
#define IOLN_RQD	004
#define IOBA_RQ		(IOPAGEBASE + 012150)		/* UDA50 */
#define IOLN_RQ		004
#define IOBA_TS		(IOPAGEBASE + 012520)		/* TS11 */
#define IOLN_TS		004
#define IOBA_RL		(IOPAGEBASE + 014400)		/* RL11 */
#define IOLN_RL		012
#define IOBA_TQ		(IOPAGEBASE + 014500)		/* TMSCP */
#define IOLN_TQ		004
#define IOBA_XU		(IOPAGEBASE + 014510)		/* DEUNA/DELUA */
#define IOLN_XU		010
#define IOBA_RX		(IOPAGEBASE + 017170)		/* RX11 */
#define IOLN_RX		004
#define IOBA_RY		(IOPAGEBASE + 017170)		/* RXV21 */
#define IOLN_RY		004
#define IOBA_HK		(IOPAGEBASE + 017440)		/* RK611 */
#define IOLN_HK		040
#define IOBA_LPT	(IOPAGEBASE + 017514)		/* LP11 */
#define IOLN_LPT	004
#define IOBA_PTR	(IOPAGEBASE + 017550)		/* PC11 reader */
#define IOLN_PTR	004
#define IOBA_PTP	(IOPAGEBASE + 017554)		/* PC11 punch */
#define IOLN_PTP	004

/* Interrupt assignments; within each level, priority is right to left */

#define INT_V_DZRX	0				/* BR5 */
#define INT_V_DZTX	1
#define INT_V_HK	2
#define INT_V_RL	3
#define INT_V_RQ	4
#define INT_V_TQ	5
#define INT_V_TS	6
#define INT_V_RY	7
#define INT_V_XU	8

#define INT_V_LPT	0				/* BR4 */
#define INT_V_PTR	1
#define INT_V_PTP	2

#define INT_DZRX	(1u << INT_V_DZRX)
#define INT_DZTX	(1u << INT_V_DZTX)
#define INT_HK		(1u << INT_V_HK)
#define INT_RL		(1u << INT_V_RL)
#define INT_RQ		(1u << INT_V_RQ)
#define INT_TQ		(1u << INT_V_TQ)
#define INT_TS		(1u << INT_V_TS)
#define INT_RY		(1u << INT_V_RY)
#define INT_XU		(1u << INT_V_XU)
#define INT_PTR		(1u << INT_V_PTR)
#define INT_PTP		(1u << INT_V_PTP)
#define INT_LPT		(1u << INT_V_LPT)

#define IPL_DZRX	(0x15 - IPL_HMIN)
#define IPL_DZTX	(0x15 - IPL_HMIN)
#define IPL_HK		(0x15 - IPL_HMIN)
#define IPL_RL		(0x15 - IPL_HMIN)
#define IPL_RQ		(0x15 - IPL_HMIN)
#define IPL_TQ		(0x15 - IPL_HMIN)
#define IPL_TS		(0x15 - IPL_HMIN)
#define IPL_RY		(0x15 - IPL_HMIN)
#define IPL_XU		(0x15 - IPL_HMIN)
#define IPL_PTR		(0x14 - IPL_HMIN)
#define IPL_PTP		(0x14 - IPL_HMIN)
#define IPL_LPT		(0x14 - IPL_HMIN)

/* Device vectors */

#define VEC_Q		0000
#define VEC_PTR		0070
#define VEC_PTP		0074
#define VEC_XU		0120
#define VEC_RQ		0154
#define VEC_RL		0160
#define VEC_LPT		0200
#define VEC_HK		0210
#define VEC_TS		0224
#define VEC_TQ		0260
#define VEC_RX		0264
#define VEC_RY		0264
#define VEC_DZRX	0300
#define VEC_DZTX	0304

/* Autoconfigure ranks */

#define RANK_DZ		8
#define RANK_RL		14
#define RANK_RX		18
#define RANK_XU		25
#define RANK_RQ		26
#define RANK_TQ		30
#define RANK_VH		32

/* Interrupt macros */

#define IVCL(dv)	((IPL_##dv * 32) + INT_V_##dv)
#define NVCL(dv)	((IPL_##dv * 32) + TR_##dv)
#define IREQ(dv)	int_req[IPL_##dv]
#define SET_INT(dv)	int_req[IPL_##dv] = int_req[IPL_##dv] | (INT_##dv)
#define CLR_INT(dv)	int_req[IPL_##dv] = int_req[IPL_##dv] & ~(INT_##dv)
#define IORETURN(f,v)	((f)? (v): SCPE_OK)		/* cond error return */

/* Logging */

#define LOG_CPU_I	0x1				/* intexc */
#define LOG_CPU_R	0x2				/* REI */
#define LOG_CPU_P	0x4				/* context */

/* Massbus definitions */

#define MBA_RP		(TR_MBA0 - TR_MBA0)		/* MBA for RP */
#define MBA_TU		(TR_MBA1 - TR_MBA0)		/* MBA for TU */
#define MBA_RMASK	0x1F				/* max 32 reg */
#define MBE_NXD		1				/* nx drive */
#define MBE_NXR		2				/* nx reg */
#define MBE_GOE		3				/* err on GO */

/* Boot definitions */

#define BOOT_MB		0				/* device codes */
#define BOOT_HK		1				/* for VMB */
#define BOOT_RL		2
#define BOOT_UDA	17
#define BOOT_TK		18

/* Function prototypes for I/O */

t_bool map_addr (uint32 qa, uint32 *ma);
int32 Map_ReadB (uint32 ba, int32 bc, uint8 *buf);
int32 Map_ReadW (uint32 ba, int32 bc, uint16 *buf);
int32 Map_WriteB (uint32 ba, int32 bc, uint8 *buf);
int32 Map_WriteW (uint32 ba, int32 bc, uint16 *buf);

t_stat set_addr (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat show_addr (FILE *st, UNIT *uptr, int32 val, void *desc);
t_stat set_addr_flt (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat set_vec (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat show_vec (FILE *st, UNIT *uptr, int32 val, void *desc);
t_stat auto_config (uint32 rank, uint32 num);

int32 mba_rdbufW (uint32 mbus, int32 bc, uint16 *buf);
int32 mba_wrbufW (uint32 mbus, int32 bc, uint16 *buf);
int32 mba_chbufW (uint32 mbus, int32 bc, uint16 *buf);
int32 mba_get_bc (uint32 mbus);
void mba_upd_ata (uint32 mbus, uint32 val);
void mba_set_exc (uint32 mbus);
void mba_set_don (uint32 mbus);
t_stat mba_show_num (FILE *st, UNIT *uptr, int32 val, void *desc);

t_stat show_nexus (FILE *st, UNIT *uptr, int32 val, void *desc);

#endif