| /* vax780_mba.c: VAX 11/780 Massbus adapter | |
| 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 | |
| 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. | |
| mba0, mba1 RH780 Massbus adapter | |
| 28-May-08 RMS Inlined physical memory routines | |
| */ | |
| #include "vax_defs.h" | |
| /* Massbus */ | |
| #define MBA_NMAPR 256 /* number of map reg */ | |
| #define MBA_V_RTYPE 10 /* nexus addr: reg type */ | |
| #define MBA_M_RTYPE 0x3 | |
| #define MBART_INT 0x0 /* internal */ | |
| #define MBART_EXT 0x1 /* external */ | |
| #define MBART_MAP 0x2 /* map */ | |
| #define MBA_V_INTOFS 2 /* int reg: reg ofs */ | |
| #define MBA_M_INTOFS 0xFF | |
| #define MBA_V_DRV 7 /* ext reg: drive num */ | |
| #define MBA_M_DRV 0x7 | |
| #define MBA_V_DEVOFS 2 /* ext reg: reg ofs */ | |
| #define MBA_M_DEVOFS 0x1F | |
| #define MBA_RTYPE(x) (((x) >> MBA_V_RTYPE) & MBA_M_RTYPE) | |
| #define MBA_INTOFS(x) (((x) >> MBA_V_INTOFS) & MBA_M_INTOFS) | |
| #define MBA_EXTDRV(x) (((x) >> MBA_V_DRV) & MBA_M_DRV) | |
| #define MBA_EXTOFS(x) (((x) >> MBA_V_DEVOFS) & MBA_M_DEVOFS) | |
| /* Massbus configuration register */ | |
| #define MBACNF_OF 0x0 | |
| #define MBACNF_ADPDN 0x00800000 /* adap pdn - ni */ | |
| #define MBACNF_ADPUP 0x00400000 /* adap pup - ni */ | |
| #define MBACNF_CODE 0x00000020 | |
| #define MBACNF_RD (SBI_FAULTS|MBACNF_W1C) | |
| #define MBACNF_W1C 0x00C00000 | |
| /* Control register */ | |
| #define MBACR_OF 0x1 | |
| #define MBACR_MNT 0x00000008 /* maint */ | |
| #define MBACR_IE 0x00000004 /* int enable */ | |
| #define MBACR_ABORT 0x00000002 /* abort */ | |
| #define MBACR_INIT 0x00000001 | |
| #define MBACR_RD 0x0000000E | |
| #define MBACR_WR 0x0000000E | |
| /* Status register */ | |
| #define MBASR_OF 0x2 | |
| #define MBASR_DTBUSY 0x80000000 /* DT busy RO */ | |
| #define MBASR_NRCONF 0x40000000 /* no conf - ni W1C */ | |
| #define MBASR_CRD 0x20000000 /* CRD - ni W1C */ | |
| #define MBASR_CBH 0x00800000 /* CBHUNG - ni W1C */ | |
| #define MBASR_PGE 0x00080000 /* prog err - W1C int */ | |
| #define MBASR_NFD 0x00040000 /* nx drive - W1C int */ | |
| #define MBASR_MCPE 0x00020000 /* ctl perr - ni W1C int */ | |
| #define MBASR_ATA 0x00010000 /* attn - W1C int */ | |
| #define MBASR_SPE 0x00004000 /* silo perr - ni W1C int */ | |
| #define MBASR_DTCMP 0x00002000 /* xfr done - W1C int */ | |
| #define MBASR_DTABT 0x00001000 /* abort - W1C int */ | |
| #define MBASR_DLT 0x00000800 /* dat late - ni W1C abt */ | |
| #define MBASR_WCEU 0x00000400 /* wrchk upper - W1C abt */ | |
| #define MBASR_WCEL 0x00000200 /* wrchk lower - W1C abt */ | |
| #define MBASR_MXF 0x00000100 /* miss xfr - ni W1C abt */ | |
| #define MBASR_MBEXC 0x00000080 /* except - ni W1C abt */ | |
| #define MBASR_MBDPE 0x00000040 /* dat perr - ni W1C abt */ | |
| #define MBASR_MAPPE 0x00000020 /* map perr - ni W1C abt */ | |
| #define MBASR_INVM 0x00000010 /* inv map - W1C abt */ | |
| #define MBASR_ERCONF 0x00000008 /* err conf - ni W1C abt */ | |
| #define MBASR_RDS 0x00000004 /* RDS - ni W1C abt */ | |
| #define MBASR_ITMO 0x00000002 /* timeout - W1C abt */ | |
| #define MBASR_RTMO 0x00000001 /* rd timeout - W1C abt */ | |
| #define MBASR_RD 0xE08F7FFF | |
| #define MBASR_W1C 0x608F7FFF | |
| #define MBASR_ABORTS 0x00000FFF | |
| #define MBASR_ERRORS 0x608E49FF | |
| #define MBASR_INTR 0x000F7000 | |
| /* Virtual address register */ | |
| #define MBAVA_OF 0x3 | |
| #define MBAVA_RD 0x0001FFFF | |
| #define MBAVA_WR (MBAVA_RD) | |
| /* Byte count */ | |
| #define MBABC_OF 0x4 | |
| #define MBABC_WR 0x0000FFFF | |
| #define MBABC_V_MBC 16 /* MB count */ | |
| /* Diagnostic register */ | |
| #define MBADR_OF 0x5 | |
| #define MBADR_RD 0xFFFFFFFF | |
| #define MBADR_WR 0xFFC00000 | |
| /* Selected map entry - read only */ | |
| #define MBASMR_OF 0x6 | |
| #define MBASMR_RD (MBAMAP_RD) | |
| /* Command register (SBI) - read only */ | |
| #define MBACMD_OF 0x7 | |
| /* External registers */ | |
| #define MBA_CS1 0x00 /* device CSR1 */ | |
| #define MBA_CS1_WR 0x3F /* writeable bits */ | |
| #define MBA_CS1_DT 0x28 /* >= for data xfr */ | |
| /* Map registers */ | |
| #define MBAMAP_VLD 0x80000000 /* valid */ | |
| #define MBAMAP_PAG 0x001FFFFF | |
| #define MBAMAP_RD (MBAMAP_VLD | MBAMAP_PAG) | |
| #define MBAMAP_WR (MBAMAP_RD) | |
| /* Debug switches */ | |
| #define MBA_DEB_RRD 0x01 /* reg reads */ | |
| #define MBA_DEB_RWR 0x02 /* reg writes */ | |
| #define MBA_DEB_MRD 0x04 /* map reads */ | |
| #define MBA_DEB_MWR 0x08 /* map writes */ | |
| #define MBA_DEB_XFR 0x10 /* transfers */ | |
| #define MBA_DEB_ERR 0x20 /* errors */ | |
| uint32 mba_cnf[MBA_NUM]; /* config reg */ | |
| uint32 mba_cr[MBA_NUM]; /* control reg */ | |
| uint32 mba_sr[MBA_NUM]; /* status reg */ | |
| uint32 mba_va[MBA_NUM]; /* virt addr */ | |
| uint32 mba_bc[MBA_NUM]; /* byte count */ | |
| uint32 mba_dr[MBA_NUM]; /* diag reg */ | |
| uint32 mba_smr[MBA_NUM]; /* sel map reg */ | |
| uint32 mba_map[MBA_NUM][MBA_NMAPR]; /* map */ | |
| extern uint32 nexus_req[NEXUS_HLVL]; | |
| extern UNIT cpu_unit; | |
| extern FILE *sim_log; | |
| extern FILE *sim_deb; | |
| extern int32 sim_switches; | |
| t_stat mba_reset (DEVICE *dptr); | |
| t_stat mba_rdreg (int32 *val, int32 pa, int32 mode); | |
| t_stat mba_wrreg (int32 val, int32 pa, int32 lnt); | |
| t_bool mba_map_addr (uint32 va, uint32 *ma, uint32 mb); | |
| void mba_set_int (uint32 mb); | |
| void mba_clr_int (uint32 mb); | |
| void mba_upd_sr (uint32 set, uint32 clr, uint32 mb); | |
| DIB mba0_dib, mba1_dib; | |
| /* Massbus register dispatches */ | |
| static t_stat (*mbregR[MBA_NUM])(int32 *dat, int32 ad, int32 md); | |
| static t_stat (*mbregW[MBA_NUM])(int32 dat, int32 ad, int32 md); | |
| static int32 (*mbabort[MBA_NUM])(void); | |
| /* Massbus adapter data structures | |
| mba_dev MBA device descriptors | |
| mbax_unit MBA unit | |
| mbax_reg MBA register list | |
| */ | |
| DIB mba0_dib = { TR_MBA0, 0, &mba_rdreg, &mba_wrreg, 0, NVCL (MBA0) }; | |
| UNIT mba0_unit = { UDATA (NULL, 0, 0) }; | |
| REG mba0_reg[] = { | |
| { HRDATA (CNFR, mba_cnf[0], 32) }, | |
| { HRDATA (CR, mba_cr[0], 4) }, | |
| { HRDATA (SR, mba_sr[0], 32) }, | |
| { HRDATA (VA, mba_va[0], 17) }, | |
| { HRDATA (BC, mba_bc[0], 16) }, | |
| { HRDATA (DR, mba_dr[0], 32) }, | |
| { HRDATA (SMR, mba_dr[0], 32) }, | |
| { BRDATA (MAP, mba_map[0], 16, 32, MBA_NMAPR) }, | |
| { FLDATA (NEXINT, nexus_req[IPL_MBA0], TR_MBA0) }, | |
| { NULL } | |
| }; | |
| MTAB mba0_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, TR_MBA0, "NEXUS", NULL, | |
| NULL, &show_nexus }, | |
| { 0 } | |
| }; | |
| DIB mba1_dib = { TR_MBA1, 0, &mba_rdreg, &mba_wrreg, 0, NVCL (MBA1) }; | |
| UNIT mba1_unit = { UDATA (NULL, 0, 0) }; | |
| MTAB mba1_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, TR_MBA1, "NEXUS", NULL, | |
| NULL, &show_nexus }, | |
| { 0 } | |
| }; | |
| REG mba1_reg[] = { | |
| { HRDATA (CNFR, mba_cnf[1], 32) }, | |
| { HRDATA (CR, mba_cr[1], 4) }, | |
| { HRDATA (SR, mba_sr[1], 32) }, | |
| { HRDATA (VA, mba_va[1], 17) }, | |
| { HRDATA (BC, mba_bc[1], 16) }, | |
| { HRDATA (DR, mba_dr[1], 32) }, | |
| { HRDATA (SMR, mba_dr[1], 32) }, | |
| { BRDATA (MAP, mba_map[1], 16, 32, MBA_NMAPR) }, | |
| { FLDATA (NEXINT, nexus_req[IPL_MBA1], TR_MBA1) }, | |
| { NULL } | |
| }; | |
| DEBTAB mba_deb[] = { | |
| { "REGREAD", MBA_DEB_RRD }, | |
| { "REGWRITE", MBA_DEB_RWR }, | |
| { "MAPREAD", MBA_DEB_MRD }, | |
| { "MAPWRITE", MBA_DEB_MWR }, | |
| { "XFER", MBA_DEB_XFR }, | |
| { "ERROR", MBA_DEB_ERR }, | |
| { NULL, 0 } | |
| }; | |
| DEVICE mba_dev[] = { | |
| { | |
| "MBA0", &mba0_unit, mba0_reg, mba0_mod, | |
| 1, 0, 0, 0, 0, 0, | |
| NULL, NULL, &mba_reset, | |
| NULL, NULL, NULL, | |
| &mba0_dib, DEV_NEXUS | DEV_DEBUG, 0, | |
| mba_deb, 0, 0 | |
| }, | |
| { | |
| "MBA1", &mba1_unit, mba1_reg, mba1_mod, | |
| 1, 0, 0, 0, 0, 0, | |
| NULL, NULL, &mba_reset, | |
| NULL, NULL, NULL, | |
| &mba1_dib, DEV_NEXUS | DEV_DEBUG, 0, | |
| mba_deb, 0, 0 | |
| } | |
| }; | |
| /* Read Massbus adapter register */ | |
| t_stat mba_rdreg (int32 *val, int32 pa, int32 lnt) | |
| { | |
| int32 mb, ofs, drv, rtype; | |
| uint32 t; | |
| t_stat r; | |
| mb = NEXUS_GETNEX (pa) - TR_MBA0; /* get MBA */ | |
| if ((pa & 3) || (lnt != L_LONG)) { /* unaligned or not lw? */ | |
| printf (">>MBA%d: invalid adapter read mask, pa = %X, lnt = %d\r\n", mb, pa, lnt); | |
| sbi_set_errcnf (); /* err confirmation */ | |
| return SCPE_OK; | |
| } | |
| if (mb >= MBA_NUM) /* valid? */ | |
| return SCPE_NXM; | |
| rtype = MBA_RTYPE (pa); /* get reg type */ | |
| switch (rtype) { /* case on type */ | |
| case MBART_INT: /* internal */ | |
| ofs = MBA_INTOFS (pa); /* check range */ | |
| switch (ofs) { | |
| case MBACNF_OF: /* CNF */ | |
| *val = (mba_cnf[mb] & MBACNF_RD) | MBACNF_CODE; | |
| break; | |
| case MBACR_OF: /* CR */ | |
| *val = mba_cr[mb] & MBACR_RD; | |
| break; | |
| case MBASR_OF: /* SR */ | |
| *val = mba_sr[mb] & MBASR_RD; | |
| break; | |
| case MBAVA_OF: /* VA */ | |
| *val = mba_va[mb] & MBAVA_RD; | |
| break; | |
| case MBABC_OF: /* BC */ | |
| t = mba_bc[mb] & MBABC_WR; | |
| *val = (t << MBABC_V_MBC) | t; | |
| break; | |
| case MBADR_OF: /* DR */ | |
| *val = mba_dr[mb] & MBADR_RD; | |
| break; | |
| case MBASMR_OF: /* SMR */ | |
| *val = mba_smr[mb] & MBASMR_RD; | |
| break; | |
| case MBACMD_OF: /* CMD */ | |
| *val = 0; | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| } | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_RRD)) | |
| fprintf (sim_deb, ">>MBA%d: int reg %d read, value = %X\n", mb, ofs, *val); | |
| break; | |
| case MBART_EXT: /* external */ | |
| if (!mbregR[mb]) /* device there? */ | |
| return SCPE_NXM; | |
| drv = MBA_EXTDRV (pa); /* get dev num */ | |
| ofs = MBA_EXTOFS (pa); /* get reg offs */ | |
| r = mbregR[mb] (val, ofs, drv); /* call device */ | |
| if (r == MBE_NXD) /* nx drive? */ | |
| mba_upd_sr (MBASR_NFD, 0, mb); | |
| else if (r == MBE_NXR) /* nx reg? */ | |
| return SCPE_NXM; | |
| *val |= (mba_sr[mb] & ~WMASK); /* upper 16b from SR */ | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_RRD)) | |
| fprintf (sim_deb, ">>MBA%d: drv %d ext reg %d read, value = %X\n", mb, drv, ofs, *val); | |
| break; | |
| case MBART_MAP: /* map */ | |
| ofs = MBA_INTOFS (pa); | |
| *val = mba_map[mb][ofs] & MBAMAP_RD; | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_MRD)) | |
| fprintf (sim_deb, ">>MBA%d: map %d read, value = %X\n", mb, ofs, *val); | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Write Massbus adapter register */ | |
| t_stat mba_wrreg (int32 val, int32 pa, int32 lnt) | |
| { | |
| int32 mb, ofs, drv, rtype; | |
| t_stat r; | |
| t_bool cs1dt; | |
| mb = NEXUS_GETNEX (pa) - TR_MBA0; /* get MBA */ | |
| if ((pa & 3) || (lnt != L_LONG)) { /* unaligned or not lw? */ | |
| printf (">>MBA%d: invalid adapter write mask, pa = %X, lnt = %d\r\n", mb, pa, lnt); | |
| sbi_set_errcnf (); /* err confirmation */ | |
| return SCPE_OK; | |
| } | |
| if (mb >= MBA_NUM) /* valid? */ | |
| return SCPE_NXM; | |
| rtype = MBA_RTYPE (pa); /* get reg type */ | |
| switch (rtype) { /* case on type */ | |
| case MBART_INT: /* internal */ | |
| ofs = MBA_INTOFS (pa); /* check range */ | |
| switch (ofs) { | |
| case MBACNF_OF: /* CNF */ | |
| mba_cnf[mb] &= ~(val & MBACNF_W1C); | |
| break; | |
| case MBACR_OF: /* CR */ | |
| if (val & MBACR_INIT) /* init? */ | |
| mba_reset (&mba_dev[mb]); /* reset MBA */ | |
| if ((val & MBACR_ABORT) && | |
| (mba_sr[mb] & MBASR_DTBUSY)) { | |
| if (mbabort[mb]) /* abort? */ | |
| mbabort[mb] (); | |
| mba_upd_sr (MBASR_DTABT, 0, mb); | |
| } | |
| if ((val & MBACR_MNT) && | |
| (mba_sr[mb] & MBASR_DTBUSY)) { | |
| mba_upd_sr (MBASR_PGE, 0, mb); /* mnt & xfer? */ | |
| val = val & ~MBACR_MNT; | |
| } | |
| if ((val & MBACR_IE) == 0) | |
| mba_clr_int (mb); | |
| mba_cr[mb] = (mba_cr[mb] & ~MBACR_WR) | | |
| (val & MBACR_WR); | |
| break; | |
| case MBASR_OF: /* SR */ | |
| mba_sr[mb] = mba_sr[mb] & ~(val & MBASR_W1C); | |
| break; | |
| case MBAVA_OF: /* VA */ | |
| if (mba_sr[mb] & MBASR_DTBUSY) /* err if xfr */ | |
| mba_upd_sr (MBASR_PGE, 0, mb); | |
| else mba_va[mb] = val & MBAVA_WR; | |
| break; | |
| case MBABC_OF: /* BC */ | |
| if (mba_sr[mb] & MBASR_DTBUSY) /* err if xfr */ | |
| mba_upd_sr (MBASR_PGE, 0, mb); | |
| else mba_bc[mb] = val & MBABC_WR; | |
| break; | |
| case MBADR_OF: /* DR */ | |
| mba_dr[mb] = (mba_dr[mb] & ~MBADR_WR) | | |
| (val & MBADR_WR); | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| } | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_RWR)) | |
| fprintf (sim_deb, ">>MBA%d: int reg %d write, value = %X\n", mb, ofs, val); | |
| break; | |
| case MBART_EXT: /* external */ | |
| if (!mbregW[mb]) /* device there? */ | |
| return SCPE_NXM; | |
| drv = MBA_EXTDRV (pa); /* get dev num */ | |
| ofs = MBA_EXTOFS (pa); /* get reg offs */ | |
| cs1dt = (ofs == MBA_CS1) && (val & CSR_GO) && /* starting xfr? */ | |
| ((val & MBA_CS1_WR) >= MBA_CS1_DT); | |
| if (cs1dt && (mba_sr[mb] & MBASR_DTBUSY)) { /* xfr while busy? */ | |
| mba_upd_sr (MBASR_PGE, 0, mb); /* prog error */ | |
| break; | |
| } | |
| r = mbregW[mb] (val & WMASK, ofs, drv); /* write dev reg */ | |
| if (r == MBE_NXD) /* nx drive? */ | |
| mba_upd_sr (MBASR_NFD, 0, mb); | |
| else if (r == MBE_NXR) /* nx reg? */ | |
| return SCPE_NXM; | |
| if (cs1dt && (r == SCPE_OK)) /* did dt start? */ | |
| mba_sr[mb] = (mba_sr[mb] | MBASR_DTBUSY) & ~MBASR_W1C; | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_RWR)) | |
| fprintf (sim_deb, ">>MBA%d: drv %d ext reg %d write, value = %X\n", mb, drv, ofs, val); | |
| break; | |
| case MBART_MAP: /* map */ | |
| ofs = MBA_INTOFS (pa); | |
| mba_map[mb][ofs] = val & MBAMAP_WR; | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_MWR)) | |
| fprintf (sim_deb, ">>MBA%d: map %d write, value = %X\n", mb, ofs, val); | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Massbus I/O routine | |
| mb_rdbufW - fetch word buffer from memory | |
| mb_wrbufW - store word buffer into memory | |
| mb_chbufW - compare word buffer with memory | |
| Returns number of bytes successfully transferred/checked | |
| */ | |
| int32 mba_rdbufW (uint32 mb, int32 bc, uint16 *buf) | |
| { | |
| int32 i, j, ba, mbc, pbc; | |
| uint32 pa, dat; | |
| if (mb >= MBA_NUM) /* valid MBA? */ | |
| return 0; | |
| ba = mba_va[mb]; /* get virt addr */ | |
| mbc = (MBABC_WR + 1) - mba_bc[mb]; /* get Mbus bc */ | |
| if (bc > mbc) /* use smaller */ | |
| bc = mbc; | |
| for (i = 0; i < bc; i = i + pbc) { /* loop by pages */ | |
| if (!mba_map_addr (ba + i, &pa, mb)) /* page inv? */ | |
| break; | |
| if (!ADDR_IS_MEM (pa)) { /* NXM? */ | |
| mba_upd_sr (MBASR_RTMO, 0, mb); | |
| break; | |
| } | |
| pbc = VA_PAGSIZE - VA_GETOFF (pa); /* left in page */ | |
| if (pbc > (bc - i)) /* limit to rem xfr */ | |
| pbc = bc - i; | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_XFR)) | |
| fprintf (sim_deb, ">>MBA%d: read, pa = %X, bc = %X\n", mb, pa, pbc); | |
| if ((pa | pbc) & 1) { /* aligned word? */ | |
| for (j = 0; j < pbc; pa++, j++) { /* no, bytes */ | |
| if ((i + j) & 1) { /* odd byte? */ | |
| *buf = (*buf & BMASK) | (ReadB (pa) << 8); | |
| buf++; | |
| } | |
| else *buf = (*buf & ~BMASK) | ReadB (pa); | |
| } | |
| } | |
| else if ((pa | pbc) & 3) { /* aligned LW? */ | |
| for (j = 0; j < pbc; pa = pa + 2, j = j + 2) { /* no, words */ | |
| *buf++ = ReadW (pa); /* get word */ | |
| } | |
| } | |
| else { /* yes, do by LW */ | |
| for (j = 0; j < pbc; pa = pa + 4, j = j + 4) { | |
| dat = ReadL (pa); /* get lw */ | |
| *buf++ = dat & WMASK; /* low 16b */ | |
| *buf++ = (dat >> 16) & WMASK; /* high 16b */ | |
| } | |
| } | |
| } | |
| mba_bc[mb] = (mba_bc[mb] + i) & MBABC_WR; | |
| mba_va[mb] = (mba_va[mb] + i) & MBAVA_WR; | |
| return i; | |
| } | |
| int32 mba_wrbufW (uint32 mb, int32 bc, uint16 *buf) | |
| { | |
| int32 i, j, ba, mbc, pbc; | |
| uint32 pa, dat; | |
| if (mb >= MBA_NUM) /* valid MBA? */ | |
| return 0; | |
| ba = mba_va[mb]; /* get virt addr */ | |
| mbc = (MBABC_WR + 1) - mba_bc[mb]; /* get Mbus bc */ | |
| if (bc > mbc) /* use smaller */ | |
| bc = mbc; | |
| for (i = 0; i < bc; i = i + pbc) { /* loop by pages */ | |
| if (!mba_map_addr (ba + i, &pa, mb)) /* page inv? */ | |
| break; | |
| if (!ADDR_IS_MEM (pa)) { /* NXM? */ | |
| mba_upd_sr (MBASR_RTMO, 0, mb); | |
| break; | |
| } | |
| pbc = VA_PAGSIZE - VA_GETOFF (pa); /* left in page */ | |
| if (pbc > (bc - i)) /* limit to rem xfr */ | |
| pbc = bc - i; | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_XFR)) | |
| fprintf (sim_deb, ">>MBA%d: write, pa = %X, bc = %X\n", mb, pa, pbc); | |
| if ((pa | pbc) & 1) { /* aligned word? */ | |
| for (j = 0; j < pbc; pa++, j++) { /* no, bytes */ | |
| if ((i + j) & 1) { | |
| WriteB (pa, (*buf >> 8) & BMASK); | |
| buf++; | |
| } | |
| else WriteB (pa, *buf & BMASK); | |
| } | |
| } | |
| else if ((pa | pbc) & 3) { /* aligned LW? */ | |
| for (j = 0; j < pbc; pa = pa + 2, j = j + 2) { /* no, words */ | |
| WriteW (pa, *buf); /* write word */ | |
| buf++; | |
| } | |
| } | |
| else { /* yes, do by LW */ | |
| for (j = 0; j < pbc; pa = pa + 4, j = j + 4) { | |
| dat = (uint32) *buf++; /* get low 16b */ | |
| dat = dat | (((uint32) *buf++) << 16); /* merge hi 16b */ | |
| WriteL (pa, dat); /* store LW */ | |
| } | |
| } | |
| } | |
| mba_bc[mb] = (mba_bc[mb] + i) & MBABC_WR; | |
| mba_va[mb] = (mba_va[mb] + i) & MBAVA_WR; | |
| return i; | |
| } | |
| int32 mba_chbufW (uint32 mb, int32 bc, uint16 *buf) | |
| { | |
| int32 i, j, ba, mbc, pbc; | |
| uint32 pa, dat, cmp; | |
| if (mb >= MBA_NUM) /* valid MBA? */ | |
| return 0; | |
| ba = mba_va[mb]; /* get virt addr */ | |
| mbc = (MBABC_WR + 1) - mba_bc[mb]; /* get Mbus bc */ | |
| if (bc > mbc) /* use smaller */ | |
| bc = mbc; | |
| for (i = 0; i < bc; i = i + pbc) { /* loop by pages */ | |
| if (!mba_map_addr (ba + i, &pa, mb)) /* page inv? */ | |
| break; | |
| if (!ADDR_IS_MEM (pa)) { /* NXM? */ | |
| mba_upd_sr (MBASR_RTMO, 0, mb); | |
| break; | |
| } | |
| pbc = VA_PAGSIZE - VA_GETOFF (pa); /* left in page */ | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_XFR)) | |
| fprintf (sim_deb, ">>MBA%d: check, pa = %X, bc = %X\n", mb, pa, pbc); | |
| if (pbc > (bc - i)) /* limit to rem xfr */ | |
| pbc = bc - i; | |
| for (j = 0; j < pbc; j++, pa++) { /* byte by byte */ | |
| cmp = ReadB (pa); | |
| if ((i + j) & 1) | |
| dat = (*buf++ >> 8) & BMASK; | |
| else dat = *buf & BMASK; | |
| if (cmp != dat) { | |
| mba_upd_sr ((j & 1)? MBASR_WCEU: MBASR_WCEL, 0, mb); | |
| break; | |
| } /* end if */ | |
| } /* end for j */ | |
| } /* end for i */ | |
| mba_bc[mb] = (mba_bc[mb] + i) & MBABC_WR; | |
| mba_va[mb] = (mba_va[mb] + i) & MBAVA_WR; | |
| return i; | |
| } | |
| /* Map an address via the translation map */ | |
| t_bool mba_map_addr (uint32 va, uint32 *ma, uint32 mb) | |
| { | |
| uint32 vblk = (va >> VA_V_VPN); /* map index */ | |
| uint32 mmap = mba_map[mb][vblk]; /* get map */ | |
| mba_smr[mb] = mmap; /* save map reg */ | |
| if (mmap & MBAMAP_VLD) { /* valid? */ | |
| *ma = ((mmap & MBAMAP_PAG) << VA_V_VPN) + VA_GETOFF (va); | |
| return 1; /* legit addr */ | |
| } | |
| mba_upd_sr (MBASR_INVM, 0, mb); /* invalid map */ | |
| return 0; | |
| } | |
| /* Device access, status, and interrupt routines */ | |
| void mba_set_don (uint32 mb) | |
| { | |
| mba_upd_sr (MBASR_DTCMP, 0, mb); | |
| return; | |
| } | |
| void mba_upd_ata (uint32 mb, uint32 val) | |
| { | |
| if (val) | |
| mba_upd_sr (MBASR_ATA, 0, mb); | |
| else mba_upd_sr (0, MBASR_ATA, mb); | |
| return; | |
| } | |
| void mba_set_exc (uint32 mb) | |
| { | |
| mba_upd_sr (MBASR_MBEXC, 0, mb); | |
| if (DEBUG_PRI (mba_dev[mb], MBA_DEB_ERR)) | |
| fprintf (sim_deb, ">>MBA%d: EXC write\n", mb); | |
| return; | |
| } | |
| int32 mba_get_bc (uint32 mb) | |
| { | |
| if (mb >= MBA_NUM) | |
| return 0; | |
| return (MBABC_WR + 1) - mba_bc[mb]; | |
| } | |
| void mba_set_int (uint32 mb) | |
| { | |
| DIB *dibp; | |
| if (mb >= MBA_NUM) | |
| return; | |
| dibp = (DIB *) mba_dev[mb].ctxt; | |
| if (dibp) | |
| nexus_req[dibp->vloc >> 5] |= (1u << (dibp->vloc & 0x1F)); | |
| return; | |
| } | |
| void mba_clr_int (uint32 mb) | |
| { | |
| DIB *dibp; | |
| if (mb >= MBA_NUM) | |
| return; | |
| dibp = (DIB *) mba_dev[mb].ctxt; | |
| if (dibp) | |
| nexus_req[dibp->vloc >> 5] &= ~(1u << (dibp->vloc & 0x1F)); | |
| return; | |
| } | |
| void mba_upd_sr (uint32 set, uint32 clr, uint32 mb) | |
| { | |
| if (mb >= MBA_NUM) | |
| return; | |
| if (set & MBASR_ABORTS) | |
| set |= (MBASR_DTCMP|MBASR_DTABT); | |
| if (set & (MBASR_DTCMP|MBASR_DTABT)) | |
| mba_sr[mb] &= ~MBASR_DTBUSY; | |
| mba_sr[mb] = (mba_sr[mb] | set) & ~clr; | |
| if ((set & MBASR_INTR) && (mba_cr[mb] & MBACR_IE)) | |
| mba_set_int (mb); | |
| if ((set & MBASR_ERRORS) && (DEBUG_PRI (mba_dev[mb], MBA_DEB_ERR))) | |
| fprintf (sim_deb, ">>MBA%d: CS error = %X\n", mb, mba_sr[mb]); | |
| return; | |
| } | |
| /* Reset Massbus adapter */ | |
| t_stat mba_reset (DEVICE *dptr) | |
| { | |
| int32 i, mb; | |
| DIB *dibp; | |
| dibp = (DIB *) dptr->ctxt; | |
| if (dibp == NULL) | |
| return SCPE_IERR; | |
| mb = dibp->ba - TR_MBA0; | |
| if ((mb < 0) || (mb >= MBA_NUM)) | |
| return SCPE_IERR; | |
| mba_cnf[mb] = 0; | |
| mba_cr[mb] &= MBACR_MNT; | |
| mba_sr[mb] = 0; | |
| mba_bc[mb] = 0; | |
| mba_va[mb] = 0; | |
| mba_dr[mb] = 0; | |
| mba_smr[mb] = 0; | |
| if (sim_switches & SWMASK ('P')) { | |
| for (i = 0; i < MBA_NMAPR; i++) | |
| mba_map[mb][i] = 0; | |
| } | |
| if (mbabort[mb]) /* reset device */ | |
| mbabort[mb] (); | |
| return SCPE_OK; | |
| } | |
| /* Show Massbus adapter number */ | |
| t_stat mba_show_num (FILE *st, UNIT *uptr, int32 val, void *desc) | |
| { | |
| DEVICE *dptr = find_dev_from_unit (uptr); | |
| DIB *dibp; | |
| if (dptr == NULL) | |
| return SCPE_IERR; | |
| dibp = (DIB *) dptr->ctxt; | |
| if (dibp == NULL) | |
| return SCPE_IERR; | |
| fprintf (st, "Massbus adapter %d", dibp->ba); | |
| return SCPE_OK; | |
| } | |
| /* Enable/disable Massbus adapter */ | |
| void mba_set_enbdis (uint32 mb, t_bool dis) | |
| { | |
| if (mb >= MBA_NUM) /* valid MBA? */ | |
| return; | |
| if (dis) | |
| mba_dev[mb].flags |= DEV_DIS; | |
| else mba_dev[mb].flags &= ~DEV_DIS; | |
| return; | |
| } | |
| /* Init Mbus tables */ | |
| void init_mbus_tab (void) | |
| { | |
| uint32 i; | |
| for (i = 0; i < MBA_NUM; i++) { | |
| mbregR[i] = NULL; | |
| mbregW[i] = NULL; | |
| mbabort[i] = NULL; | |
| } | |
| return; | |
| } | |
| /* Build dispatch tables */ | |
| t_stat build_mbus_tab (DEVICE *dptr, DIB *dibp) | |
| { | |
| uint32 idx; | |
| if ((dptr == NULL) || (dibp == NULL)) /* validate args */ | |
| return SCPE_IERR; | |
| idx = dibp->ba; /* Mbus # */ | |
| if (idx >= MBA_NUM) | |
| return SCPE_STOP; | |
| if ((mbregR[idx] && dibp->rd && /* conflict? */ | |
| (mbregR[idx] != dibp->rd)) || | |
| (mbregW[idx] && dibp->wr && | |
| (mbregW[idx] != dibp->wr)) || | |
| (mbabort[idx] && dibp->ack[0] && | |
| (mbabort[idx] != dibp->ack[0]))) { | |
| printf ("Massbus %s assignment conflict at %d\n", | |
| sim_dname (dptr), dibp->ba); | |
| if (sim_log) | |
| fprintf (sim_log, "Massbus %s assignment conflict at %d\n", | |
| sim_dname (dptr), dibp->ba); | |
| return SCPE_STOP; | |
| } | |
| if (dibp->rd) /* set rd dispatch */ | |
| mbregR[idx] = dibp->rd; | |
| if (dibp->wr) /* set wr dispatch */ | |
| mbregW[idx] = dibp->wr; | |
| if (dibp->ack[0]) /* set abort dispatch */ | |
| mbabort[idx] = dibp->ack[0]; | |
| return SCPE_OK; | |
| } | |