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/* vax730_uba.c: VAX 11/730 Unibus adapter
Copyright (c) 2010-2011, Matt Burke
This module incorporates code from SimH, Copyright (c) 2004-2008, 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
THE AUTHOR(S) 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(s) of the author(s) shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from the author(s).
uba DW730 Unibus adapter
29-Mar-2011 MB First Version
*/
#include "vax_defs.h"
/* Unibus adapter */
#define UBA_NMAPR 496 /* number of map reg */
/* Unibus configuration register */
#define UBACNF_OF 0x00
#define UBACNF_CODE 0x00000028 /* adapter code */
/* Data path registers */
#define UBADPR_OF 0x01
/* Control & Status register */
#define UBACSR_OF 0x04
#define UBACSR_WNV 0x00004000 /* write not valid */
#define UBACSR_TBPAR 0x00008000 /* TB parity err */
#define UBACSR_NXM 0x00010000 /* UB NXM */
#define UBACSR_RDS 0x80000000 /* UB read data subs */
/* Vector registers - read only */
#define UBA_UVEC 0x80000000
/* RB730 registers */
#define RB730_OF 0x80
#define RB730_LN 8
/* Map registers */
#define UBAMAP_OF 0x200
#define UBAMAP_VLD 0x80000000 /* valid */
#define UBAMAP_LWAE 0x04000000 /* LW access enb - ni */
#define UBAMAP_ODD 0x02000000 /* odd byte */
#define UBAMAP_V_DP 21 /* data path */
#define UBAMAP_M_DP 0xF
#define UBAMAP_DP (UBAMAP_M_DP << UBAMAP_V_DP)
#define UBAMAP_GETDP(x) (((x) >> UBAMAP_V_DP) & UBAMAP_M_DP)
#define UBAMAP_PAG 0x001FFFFF
#define UBAMAP_RD (0x86000000 | UBAMAP_DP | UBAMAP_PAG)
#define UBAMAP_WR (UBAMAP_RD)
/* Debug switches */
#define UBA_DEB_RRD 0x01 /* reg reads */
#define UBA_DEB_RWR 0x02 /* reg writes */
#define UBA_DEB_MRD 0x04 /* map reads */
#define UBA_DEB_MWR 0x08 /* map writes */
#define UBA_DEB_XFR 0x10 /* transfers */
#define UBA_DEB_ERR 0x20 /* errors */
int32 int_req[IPL_HLVL] = { 0 }; /* intr, IPL 14-17 */
uint32 uba_csr = 0; /* control & status reg */
uint32 uba_fmer = 0; /* failing map reg */
uint32 uba_map[UBA_NMAPR] = { 0 }; /* map registers */
int32 autcon_enb = 1; /* autoconfig enable */
extern int32 trpirq;
extern int32 autcon_enb;
extern jmp_buf save_env;
extern DEVICE *sim_devices[];
extern UNIT cpu_unit;
extern int32 sim_switches;
extern FILE *sim_log, *sim_deb;
extern int32 p1;
t_stat uba_reset (DEVICE *dptr);
t_stat uba_ex (t_value *vptr, t_addr exta, UNIT *uptr, int32 sw);
t_stat uba_dep (t_value val, t_addr exta, UNIT *uptr, int32 sw);
t_stat uba_rdreg (int32 *val, int32 pa, int32 mode);
t_stat uba_wrreg (int32 val, int32 pa, int32 lnt);
int32 uba_get_ubvector (int32 lvl);
t_bool uba_eval_int (int32 lvl);
void uba_ubpdn (int32 time);
t_bool uba_map_addr (uint32 ua, uint32 *ma);
t_stat set_autocon (UNIT *uptr, int32 val, char *cptr, void *desc);
t_stat show_autocon (FILE *st, UNIT *uptr, int32 val, void *desc);
t_stat show_iospace (FILE *st, UNIT *uptr, int32 val, void *desc);
t_stat uba_show_virt (FILE *st, UNIT *uptr, int32 val, void *desc);
extern int32 eval_int (void);
extern t_stat build_dib_tab (void);
extern t_stat rb_rd32 (int32 *data, int32 PA, int32 access);
extern t_stat rb_wr32 (int32 data, int32 PA, int32 access);
/* Unibus IO page dispatches */
t_stat (*iodispR[IOPAGESIZE >> 1])(int32 *dat, int32 ad, int32 md);
t_stat (*iodispW[IOPAGESIZE >> 1])(int32 dat, int32 ad, int32 md);
/* Unibus interrupt request to interrupt action map */
int32 (*int_ack[IPL_HLVL][32])(void); /* int ack routines */
/* Unibus interrupt request to vector map */
int32 int_vec[IPL_HLVL][32]; /* int req to vector */
/* Unibus adapter data structures
uba_dev UBA device descriptor
uba_unit UBA units
uba_reg UBA register list
*/
DIB uba_dib = { TR_UBA, 0, &uba_rdreg, &uba_wrreg, 0, 0 };
UNIT uba_unit = { UDATA (0, 0, 0) };
REG uba_reg[] = {
{ HRDATA (IPL14, int_req[0], 32), REG_RO },
{ HRDATA (IPL15, int_req[1], 32), REG_RO },
{ HRDATA (IPL16, int_req[2], 32), REG_RO },
{ HRDATA (IPL17, int_req[3], 32), REG_RO },
{ HRDATA (CSR, uba_csr, 32) },
{ BRDATA (MAP, uba_map, 16, 32, 496) },
{ FLDATA (AUTOCON, autcon_enb, 0), REG_HRO },
{ NULL }
};
MTAB uba_mod[] = {
{ MTAB_XTD|MTAB_VDV, TR_UBA, "NEXUS", NULL,
NULL, &show_nexus },
{ MTAB_XTD|MTAB_VDV|MTAB_NMO, 0, "IOSPACE", NULL,
NULL, &show_iospace },
{ MTAB_XTD|MTAB_VDV, 1, "AUTOCONFIG", "AUTOCONFIG",
&set_autocon, &show_autocon },
{ MTAB_XTD|MTAB_VDV, 0, NULL, "NOAUTOCONFIG",
&set_autocon, NULL },
{ MTAB_XTD|MTAB_VDV|MTAB_NMO|MTAB_SHP, 0, "VIRTUAL", NULL,
NULL, &uba_show_virt },
{ 0 }
};
DEBTAB uba_deb[] = {
{ "REGREAD", UBA_DEB_RRD },
{ "REGWRITE", UBA_DEB_RWR },
{ "MAPREAD", UBA_DEB_MRD },
{ "MAPWRITE", UBA_DEB_MWR },
{ "XFER", UBA_DEB_XFR },
{ "ERROR", UBA_DEB_ERR },
{ NULL, 0 }
};
DEVICE uba_dev = {
"UBA", &uba_unit, uba_reg, uba_mod,
1, 16, UBADDRWIDTH, 2, 16, 16,
&uba_ex, &uba_dep, &uba_reset,
NULL, NULL, NULL,
&uba_dib, DEV_NEXUS | DEV_DEBUG, 0,
uba_deb, 0, 0
};
/* Read Unibus adapter register - aligned lw only */
t_stat uba_rdreg (int32 *val, int32 pa, int32 lnt)
{
int32 idx, ofs;
if ((pa & 3) || (lnt != L_LONG)) { /* unaligned or not lw? */
printf (">>UBA: invalid adapter read mask, pa = %X, lnt = %d\r\n", pa, lnt);
// **FIXME** - Set error bit?
return SCPE_OK;
}
ofs = NEXUS_GETOFS (pa); /* get offset */
if (ofs >= UBAMAP_OF) { /* map? */
idx = ofs - UBAMAP_OF;
if (idx >= UBA_NMAPR) return SCPE_NXM; /* valid? */
*val = uba_map[idx] & UBAMAP_RD;
if (DEBUG_PRI (uba_dev, UBA_DEB_MRD))
fprintf (sim_deb, ">>UBA: map %d read, value = %X\n", idx, *val);
return SCPE_OK;
}
if (ofs >= RB730_OF) { /* RB730? */
idx = ofs - RB730_OF;
if (idx >= RB730_LN) return SCPE_NXM; /* valid? */
return rb_rd32 (val, pa, lnt);
}
switch (ofs) { /* case on offset */
case UBACNF_OF: /* Config Reg */
*val = UBACNF_CODE;
break;
case UBADPR_OF + 0: /* DP Regs */
case UBADPR_OF + 1:
case UBADPR_OF + 2:
*val = 0x0; /* Not used on 11/730 */
break;
case UBACSR_OF: /* CSR */
*val = uba_csr;
break;
default:
return SCPE_NXM;
}
if (DEBUG_PRI (uba_dev, UBA_DEB_RRD))
fprintf (sim_deb, ">>UBA: reg %d read, value = %X\n", ofs, *val);
return SCPE_OK;
}
/* Write Unibus adapter register */
t_stat uba_wrreg (int32 val, int32 pa, int32 lnt)
{
int32 idx, ofs;
if ((pa & 3) || (lnt != L_LONG)) { /* unaligned or not lw? */
printf (">>UBA: invalid adapter write mask, pa = %X, lnt = %d\r\n", pa, lnt);
// **FIXME** - Set error bit?
return SCPE_OK;
}
ofs = NEXUS_GETOFS (pa); /* get offset */
if (ofs >= UBAMAP_OF) { /* map? */
idx = ofs - UBAMAP_OF;
if (idx >= UBA_NMAPR) return SCPE_NXM; /* valid? */
uba_map[idx] = val & UBAMAP_WR;
if (DEBUG_PRI (uba_dev, UBA_DEB_MWR))
fprintf (sim_deb, ">>UBA: map %d write, value = %X\n", idx, val);
return SCPE_OK;
}
if (ofs >= RB730_OF) { /* RB730? */
idx = ofs - RB730_OF;
if (idx >= RB730_LN) return SCPE_NXM; /* valid? */
return rb_wr32 (val, pa, lnt);
}
switch (ofs) { /* case on offset */
case UBACNF_OF: /* Config Reg */
case UBADPR_OF + 0: /* DP Regs */
case UBADPR_OF + 1:
case UBADPR_OF + 2:
break; /* ignore writes */
case UBACSR_OF: /* CSR */
if(val & 0x10000) uba_csr = 0;
break;
default:
return SCPE_NXM;
}
if (DEBUG_PRI (uba_dev, UBA_DEB_RWR))
fprintf (sim_deb, ">>UBA: reg %d write, value = %X\n", ofs, val);
return SCPE_OK;
}
/* Read and write Unibus I/O space */
int32 ReadUb (uint32 pa)
{
int32 idx, val;
if (ADDR_IS_IOP (pa)) { /* iopage */
idx = (pa & IOPAGEMASK) >> 1;
if (iodispR[idx]) {
iodispR[idx] (&val, pa, READ);
return val;
}
}
MACH_CHECK(MCHK_IIA);
return 0;
}
void WriteUb (uint32 pa, int32 val, int32 mode)
{
int32 idx;
if (ADDR_IS_IOP (pa)) { /* iopage */
idx = (pa & IOPAGEMASK) >> 1;
if (iodispW[idx]) {
iodispW[idx] (val, pa, mode);
return;
}
}
MACH_CHECK(MCHK_IIA);
return;
}
/* ReadIO - read from IO - UBA only responds to byte, aligned word
Inputs:
pa = physical address
lnt = length (BWLQ)
Output:
longword of data
*/
int32 ReadIO (uint32 pa, int32 lnt)
{
uint32 iod;
if ((lnt == L_BYTE) || /* byte? */
((lnt == L_WORD) && ((pa & 1) == 0))) { /* aligned word? */
iod = ReadUb (pa); /* DATI from Unibus */
if (pa & 2) /* position */
iod = iod << 16;
}
else {
printf (">>UBA: invalid read mask, pa = %x, lnt = %d\n", pa, lnt);
// **FIXME** - Set error bit?
iod = 0;
}
SET_IRQL;
return iod;
}
/* WriteIO - write to IO - UBA only responds to byte, aligned word
Inputs:
pa = physical address
val = data to write, right justified in 32b longword
lnt = length (BWL)
Outputs:
none
*/
void WriteIO (uint32 pa, int32 val, int32 lnt)
{
if (lnt == L_BYTE) /* byte? DATOB */
WriteUb (pa, val, WRITEB);
else if ((lnt == L_WORD) && ((pa & 1) == 0)) /* aligned word? */
WriteUb (pa, val, WRITE); /* DATO */
else {
printf (">>UBA: invalid write mask, pa = %x, lnt = %d\n", pa, lnt);
// **FIXME** - Set error bit?
}
SET_IRQL; /* update ints */
return;
}
/* Update UBA nexus interrupts */
t_bool uba_eval_int (int32 lvl)
{
return (int_req[lvl] != 0);
}
/* Return vector for Unibus interrupt at relative IPL level [0-3] */
int32 uba_get_ubvector (int32 lvl)
{
int32 i, vec;
vec = 0;
for (i = 0; int_req[lvl] && (i < 32); i++) {
if ((int_req[lvl] >> i) & 1) {
int_req[lvl] = int_req[lvl] & ~(1u << i);
if (int_ack[lvl][i])
return (vec | int_ack[lvl][i]());
return (vec | int_vec[lvl][i]);
}
}
return vec;
}
/* Unibus I/O buffer routines
Map_ReadB - fetch byte buffer from memory
Map_ReadW - fetch word buffer from memory
Map_WriteB - store byte buffer into memory
Map_WriteW - store word buffer into memory
*/
int32 Map_ReadB (uint32 ba, int32 bc, uint8 *buf)
{
int32 i, j, pbc;
uint32 ma, dat;
ba = ba & UBADDRMASK; /* mask UB addr */
for (i = 0; i < bc; i = i + pbc) { /* loop by pages */
if (!uba_map_addr (ba + i, &ma)) /* page inv or NXM? */
return (bc - i);
pbc = VA_PAGSIZE - VA_GETOFF (ma); /* left in page */
if (pbc > (bc - i)) /* limit to rem xfr */
pbc = bc - i;
if (DEBUG_PRI (uba_dev, UBA_DEB_XFR))
fprintf (sim_deb, ">>UBA: 8b read, ma = %X, bc = %X\n", ma, pbc);
if ((ma | pbc) & 3) { /* aligned LW? */
for (j = 0; j < pbc; ma++, j++) { /* no, do by bytes */
*buf++ = ReadB (ma);
}
}
else { /* yes, do by LW */
for (j = 0; j < pbc; ma = ma + 4, j = j + 4) {
dat = ReadL (ma); /* get lw */
*buf++ = dat & BMASK; /* low 8b */
*buf++ = (dat >> 8) & BMASK; /* next 8b */
*buf++ = (dat >> 16) & BMASK; /* next 8b */
*buf++ = (dat >> 24) & BMASK;
}
}
}
return 0;
}
int32 Map_ReadW (uint32 ba, int32 bc, uint16 *buf)
{
int32 i, j, pbc;
uint32 ma, dat;
ba = ba & UBADDRMASK; /* mask UB addr */
bc = bc & ~01;
for (i = 0; i < bc; i = i + pbc) { /* loop by pages */
if (!uba_map_addr (ba + i, &ma)) /* page inv or NXM? */
return (bc - i);
pbc = VA_PAGSIZE - VA_GETOFF (ma); /* left in page */
if (pbc > (bc - i)) /* limit to rem xfr */
pbc = bc - i;
if (DEBUG_PRI (uba_dev, UBA_DEB_XFR))
fprintf (sim_deb, ">>UBA: 16b read, ma = %X, bc = %X\n", ma, pbc);
if ((ma | pbc) & 1) { /* aligned word? */
for (j = 0; j < pbc; ma++, j++) { /* no, do by bytes */
if ((i + j) & 1) { /* odd byte? */
*buf = (*buf & BMASK) | (ReadB (ma) << 8);
buf++;
}
else *buf = (*buf & ~BMASK) | ReadB (ma);
}
}
else if ((ma | pbc) & 3) { /* aligned LW? */
for (j = 0; j < pbc; ma = ma + 2, j = j + 2) { /* no, words */
*buf++ = ReadW (ma); /* get word */
}
}
else { /* yes, do by LW */
for (j = 0; j < pbc; ma = ma + 4, j = j + 4) {
dat = ReadL (ma); /* get lw */
*buf++ = dat & WMASK; /* low 16b */
*buf++ = (dat >> 16) & WMASK; /* high 16b */
}
}
}
return 0;
}
int32 Map_WriteB (uint32 ba, int32 bc, uint8 *buf)
{
int32 i, j, pbc;
uint32 ma, dat;
ba = ba & UBADDRMASK; /* mask UB addr */
for (i = 0; i < bc; i = i + pbc) { /* loop by pages */
if (!uba_map_addr (ba + i, &ma)) /* page inv or NXM? */
return (bc - i);
pbc = VA_PAGSIZE - VA_GETOFF (ma); /* left in page */
if (pbc > (bc - i)) /* limit to rem xfr */
pbc = bc - i;
if (DEBUG_PRI (uba_dev, UBA_DEB_XFR))
fprintf (sim_deb, ">>UBA: 8b write, ma = %X, bc = %X\n", ma, pbc);
if ((ma | pbc) & 3) { /* aligned LW? */
for (j = 0; j < pbc; ma++, j++) { /* no, do by bytes */
WriteB (ma, *buf);
buf++;
}
}
else { /* yes, do by LW */
for (j = 0; j < pbc; ma = ma + 4, j = j + 4) {
dat = (uint32) *buf++; /* get low 8b */
dat = dat | (((uint32) *buf++) << 8); /* merge next 8b */
dat = dat | (((uint32) *buf++) << 16); /* merge next 8b */
dat = dat | (((uint32) *buf++) << 24); /* merge hi 8b */
WriteL (ma, dat); /* store lw */
}
}
}
return 0;
}
int32 Map_WriteW (uint32 ba, int32 bc, uint16 *buf)
{
int32 i, j, pbc;
uint32 ma, dat;
ba = ba & UBADDRMASK; /* mask UB addr */
bc = bc & ~01;
for (i = 0; i < bc; i = i + pbc) { /* loop by pages */
if (!uba_map_addr (ba + i, &ma)) /* page inv or NXM? */
return (bc - i);
pbc = VA_PAGSIZE - VA_GETOFF (ma); /* left in page */
if (pbc > (bc - i)) /* limit to rem xfr */
pbc = bc - i;
if (DEBUG_PRI (uba_dev, UBA_DEB_XFR))
fprintf (sim_deb, ">>UBA: 16b write, ma = %X, bc = %X\n", ma, pbc);
if ((ma | pbc) & 1) { /* aligned word? */
for (j = 0; j < pbc; ma++, j++) { /* no, bytes */
if ((i + j) & 1) {
WriteB (ma, (*buf >> 8) & BMASK);
buf++;
}
else WriteB (ma, *buf & BMASK);
}
}
else if ((ma | pbc) & 3) { /* aligned LW? */
for (j = 0; j < pbc; ma = ma + 2, j = j + 2) { /* no, words */
WriteW (ma, *buf); /* write word */
buf++;
}
}
else { /* yes, do by LW */
for (j = 0; j < pbc; ma = ma + 4, j = j + 4) {
dat = (uint32) *buf++; /* get low 16b */
dat = dat | (((uint32) *buf++) << 16); /* merge hi 16b */
WriteL (ma, dat); /* store LW */
}
}
}
return 0;
}
/* Map an address via the translation map */
t_bool uba_map_addr (uint32 ua, uint32 *ma)
{
uint32 ublk, umap;
ublk = ua >> VA_V_VPN; /* Unibus blk */
if (ublk >= UBA_NMAPR) /* unimplemented? */
return FALSE;
umap = uba_map[ublk]; /* get map */
if (umap & UBAMAP_VLD) { /* valid? */
*ma = ((umap & UBAMAP_PAG) << VA_V_VPN) + VA_GETOFF (ua);
if ((umap & UBAMAP_DP) && (umap & UBAMAP_ODD)) /* buffered dp? */
*ma = *ma + 1; /* byte offset? */
return (ADDR_IS_MEM (*ma)); /* legit addr */
}
return FALSE;
}
/* Map an address via the translation map - console version (no status changes) */
t_bool uba_map_addr_c (uint32 ua, uint32 *ma)
{
uint32 ublk, umap;
ublk = ua >> VA_V_VPN; /* Unibus blk */
if (ublk >= UBA_NMAPR) /* unimplemented? */
return FALSE;
umap = uba_map[ublk]; /* get map */
if (umap & UBAMAP_VLD) { /* valid? */
*ma = ((umap & UBAMAP_PAG) << VA_V_VPN) + VA_GETOFF (ua);
if ((umap & UBAMAP_DP) && (umap & UBAMAP_ODD)) /* buffered dp? */
*ma = *ma + 1; /* byte offset? */
return TRUE; /* legit addr */
}
return FALSE;
}
/* Unibus power fail routines */
void uba_ubpdn (int32 time)
{
int32 i;
DEVICE *dptr;
for (i = 0; sim_devices[i] != NULL; i++) { /* reset Unibus */
dptr = sim_devices[i];
if (dptr->reset && (dptr->flags & DEV_UBUS))
dptr->reset (dptr);
}
return;
}
/* Reset Unibus adapter */
t_stat uba_reset (DEVICE *dptr)
{
int32 i;
for (i = 0; i < IPL_HLVL; i++) {
int_req[i] = 0;
}
for (i = 0; i < UBA_NMAPR; i++)
uba_map[i] = 0;
uba_csr = 0;
return SCPE_OK;
}
/* Memory examine via map (word only) */
t_stat uba_ex (t_value *vptr, t_addr exta, UNIT *uptr, int32 sw)
{
uint32 ua = (uint32) exta, pa;
if ((vptr == NULL) || (ua >= UBADDRSIZE))
return SCPE_ARG;
if (uba_map_addr_c (ua, &pa) && ADDR_IS_MEM (pa)) {
*vptr = (uint32) ReadW (pa);
return SCPE_OK;
}
return SCPE_NXM;
}
/* Memory deposit via map (word only) */
t_stat uba_dep (t_value val, t_addr exta, UNIT *uptr, int32 sw)
{
uint32 ua = (uint32) exta, pa;
if (ua >= UBADDRSIZE)
return SCPE_ARG;
if (uba_map_addr_c (ua, &pa) && ADDR_IS_MEM (pa)) {
WriteW (pa, (int32) val);
return SCPE_OK;
}
return SCPE_NXM;
}
/* Show UBA virtual address */
t_stat uba_show_virt (FILE *of, UNIT *uptr, int32 val, void *desc)
{
t_stat r;
char *cptr = (char *) desc;
uint32 ua, pa;
if (cptr) {
ua = (uint32) get_uint (cptr, 16, UBADDRSIZE - 1, &r);
if (r == SCPE_OK) {
if (uba_map_addr_c (ua, &pa))
fprintf (of, "Unibus %-X = physical %-X\n", ua, pa);
else fprintf (of, "Unibus %-X: invalid mapping\n", ua);
return SCPE_OK;
}
}
fprintf (of, "Invalid argument\n");
return SCPE_OK;
}