| /* vax750_uba.c: VAX 11/750 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 DW750 Unibus adapter | |
| 21-Oct-2012 MB First Version | |
| */ | |
| #include "vax_defs.h" | |
| /* Unibus adapter */ | |
| #define UBA_NDPATH 16 /* number of data paths */ | |
| #define UBA_NMAPR 496 /* number of map reg */ | |
| /* Unibus adapter configuration register */ | |
| #define UBACNF_OF 0x00 | |
| #define UBACNF_CODE 0x00000028 /* adapter code */ | |
| /* Control/Status registers */ | |
| #define UBACSR1_OF 0x01 | |
| #define UBACSR2_OF 0x02 | |
| #define UBACSR3_OF 0x03 | |
| #define UBACSR_PUR 0x00000001 /* Purge request */ | |
| #define UBACSR_UCE 0x20000000 /* Uncorrectable err */ | |
| #define UBACSR_NXM 0x40000000 /* NXM */ | |
| #define UBACSR_ERR 0x80000000 /* Error flag */ | |
| #define UBACSR_RD (UBACSR_PUR | UBACSR_UCE | UBACSR_NXM | \ | |
| UBACSR_ERR) | |
| #define UBACSR_WR 0 | |
| /* 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_csr1 = 0; /* csr reg 1 */ | |
| uint32 uba_csr2 = 0; /* csr reg 2 */ | |
| uint32 uba_csr3 = 0; /* csr reg 3 */ | |
| uint32 uba_int = 0; /* UBA interrupt */ | |
| 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 UNIT cpu_unit; | |
| extern uint32 nexus_req[NEXUS_HLVL]; | |
| extern int32 p1; | |
| extern int32 fault_PC; /* fault PC */ | |
| extern int32 mem_err; | |
| 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); | |
| void uba_eval_int (void); | |
| void uba_ioreset (void); | |
| 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 void cmi_set_tmo (void); | |
| /* 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[] = { | |
| { HRDATAD (IPL17, int_req[3], 32, "IPL 17 interrupt flags"), REG_RO }, | |
| { HRDATAD (IPL16, int_req[2], 32, "IPL 16 interrupt flags"), REG_RO }, | |
| { HRDATAD (IPL15, int_req[1], 32, "IPL 15 interrupt flags"), REG_RO }, | |
| { HRDATAD (IPL14, int_req[0], 32, "IPL 14 interrupt flags"), REG_RO }, | |
| { HRDATAD (CSR1, uba_csr1, 32, "Control/Status register for BDP #1") }, | |
| { HRDATAD (CSR2, uba_csr2, 32, "Control/Status register for BDP #2") }, | |
| { HRDATAD (CSR3, uba_csr3, 32, "Control/Status register for BDP #3") }, | |
| { FLDATAD (INT, uba_int, 0, "Interrupt pending") }, | |
| { FLDATAD (NEXINT, nexus_req[IPL_UBA], TR_UBA, "Nexus interrupt pending") }, | |
| { BRDATAD (MAP, uba_map, 16, 32, 496, "Unibus map registers") }, | |
| { 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 appropriate error bits */ | |
| return SCPE_OK; | |
| } | |
| ofs = NEXUS_GETOFS (pa); /* get offset */ | |
| if (ofs >= UBAMAP_OF) { /* map? */ | |
| idx = ofs - UBAMAP_OF; | |
| if (idx >= UBA_NMAPR) /* valid? */ | |
| return SCPE_NXM; | |
| *val = uba_map[idx] & UBAMAP_RD; | |
| if (DEBUG_PRI (uba_dev, UBA_DEB_MRD)) | |
| fprintf (sim_deb, ">>UBA: map %d read, value = %X at PC = %08X\n", idx, *val, fault_PC); | |
| return SCPE_OK; | |
| } | |
| switch (ofs) { /* case on offset */ | |
| case UBACNF_OF: /* Config Reg */ | |
| *val = UBACNF_CODE; | |
| break; | |
| case UBACSR1_OF: /* CSR1 */ | |
| *val = (uba_csr1 & UBACSR_RD); | |
| break; | |
| case UBACSR2_OF: /* CSR2 */ | |
| *val = (uba_csr2 & UBACSR_RD); | |
| break; | |
| case UBACSR3_OF: /* CSR3 */ | |
| *val = (uba_csr3 & UBACSR_RD); | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| } | |
| if (DEBUG_PRI (uba_dev, UBA_DEB_RRD)) | |
| fprintf (sim_deb, ">>UBA: reg %d read, value = %X at PC = %08X\n", ofs, *val, fault_PC); | |
| 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 appropriate error bits */ | |
| return SCPE_OK; | |
| } | |
| ofs = NEXUS_GETOFS (pa); /* get offset */ | |
| if (ofs >= UBAMAP_OF) { /* map? */ | |
| idx = ofs - UBAMAP_OF; | |
| if (idx >= UBA_NMAPR) /* valid? */ | |
| return SCPE_NXM; | |
| uba_map[idx] = val & UBAMAP_WR; | |
| if (DEBUG_PRI (uba_dev, UBA_DEB_MWR)) | |
| fprintf (sim_deb, ">>UBA: map %d write, value = %X at PC = %08X\n", idx, val, fault_PC); | |
| return SCPE_OK; | |
| } | |
| switch (ofs) { /* case on offset */ | |
| case UBACNF_OF: /* Config Reg */ | |
| break; | |
| case UBACSR1_OF: /* CSR1 */ | |
| uba_csr1 = (val & UBACSR_WR); | |
| break; | |
| case UBACSR2_OF: /* CSR2 */ | |
| uba_csr2 = (val & UBACSR_WR); | |
| break; | |
| case UBACSR3_OF: /* CSR3 */ | |
| uba_csr3 = (val & UBACSR_WR); | |
| break; | |
| default: | |
| return SCPE_NXM; | |
| break; | |
| } | |
| if (DEBUG_PRI (uba_dev, UBA_DEB_RWR)) | |
| fprintf (sim_deb, ">>UBA: reg %d write, value = %X at PC = %08X\n", ofs, val, fault_PC); | |
| return SCPE_OK; | |
| } | |
| /* Read and write Unibus I/O space */ | |
| int32 ReadUb (uint32 pa) | |
| { | |
| int32 idx, val; | |
| if (ADDR_IS_IOP (pa)) { /* iopage,!init */ | |
| idx = (pa & IOPAGEMASK) >> 1; | |
| if (iodispR[idx]) { | |
| iodispR[idx] (&val, pa, READ); | |
| return val; | |
| } | |
| } | |
| cmi_set_tmo(); | |
| MACH_CHECK(MCHK_BPE); | |
| return 0; | |
| } | |
| void WriteUb (uint32 pa, int32 val, int32 mode) | |
| { | |
| int32 idx; | |
| if (ADDR_IS_IOP (pa)) { /* iopage,!init */ | |
| idx = (pa & IOPAGEMASK) >> 1; | |
| if (iodispW[idx]) { | |
| iodispW[idx] (val, pa, mode); | |
| return; | |
| } | |
| } | |
| cmi_set_tmo(); | |
| mem_err = 1; /* interrupt */ | |
| SET_IRQL; | |
| 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 appropriate error bits */ | |
| 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 appropriate error bits */ | |
| } | |
| SET_IRQL; /* update ints */ | |
| return; | |
| } | |
| /* Update UBA nexus interrupts */ | |
| void uba_eval_int (void) | |
| { | |
| int32 i; | |
| for (i = 0; i < (IPL_HMAX - IPL_HMIN); i++) /* clear all UBA req */ | |
| nexus_req[i] &= ~(1 << TR_UBA); | |
| for (i = 0; i < (IPL_HMAX - IPL_HMIN); i++) { | |
| if (int_req[i]) | |
| nexus_req[i] |= (1 << TR_UBA); | |
| } | |
| if (uba_int) /* adapter int? */ | |
| SET_NEXUS_INT (UBA); | |
| return; | |
| } | |
| /* Return vector for Unibus interrupt at relative IPL level [0-3] */ | |
| int32 uba_get_ubvector (int32 lvl) | |
| { | |
| int32 i, vec; | |
| vec = 0; | |
| if ((lvl == (IPL_UBA - IPL_HMIN)) && uba_int) { /* UBA lvl, int? */ | |
| uba_int = 0; /* clear int */ | |
| } | |
| 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; | |
| } | |
| /* Reset Unibus devices */ | |
| void uba_ioreset (void) | |
| { | |
| 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++) { | |
| nexus_req[i] &= ~(1 << TR_UBA); | |
| int_req[i] = 0; | |
| } | |
| for (i = 0; i < UBA_NMAPR; i++) | |
| uba_map[i] = 0; | |
| uba_csr1 = 0; | |
| uba_csr2 = 0; | |
| uba_csr3 = 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; | |
| } |