| /* vax750_cmi.c: VAX 11/750 CMI | |
| Copyright (c) 2010-2011, Matt Burke | |
| This module incorporates code from SimH, Copyright (c) 2004-2011, 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). | |
| This module contains the VAX 11/750 system-specific registers and devices. | |
| cmi bus controller | |
| 21-Oct-2012 MB First Version | |
| */ | |
| #include "vax_defs.h" | |
| #ifdef DONT_USE_INTERNAL_ROM | |
| #define BOOT_CODE_FILENAME "vmb.exe" | |
| #else /* !DONT_USE_INTERNAL_ROM */ | |
| #include "vax_vmb_exe.h" /* Defines BOOT_CODE_FILENAME and BOOT_CODE_ARRAY, etc */ | |
| #endif /* DONT_USE_INTERNAL_ROM */ | |
| /* 11/750 specific IPRs */ | |
| #define CMIERR_CRD 0x00000001 | |
| #define CMIERR_LEB 0x00000002 | |
| #define CMIERR_RDS 0x00000004 | |
| #define CMIERR_ME 0x00000008 | |
| #define CMIERR_TBH 0x00000010 | |
| #define CMIERR_TBG0DE 0x00000100 | |
| #define CMIERR_TBG1DE 0x00000200 | |
| #define CMIERR_TBG0TE 0x00000400 | |
| #define CMIERR_TBG1TE 0x00000800 | |
| #define CMIERR_V_MODE 16 | |
| #define CMIERR_M_MODE 0x3 | |
| #define CMIERR_MODE (CMIERR_M_MODE << CMIERR_V_MODE) | |
| #define CMIERR_REF 0x00040000 | |
| #define CMIERR_RM 0x00080000 | |
| #define CMIERR_EN 0x00100000 | |
| /* PCS Patch Address */ | |
| #define PCS_BITCNT 0x2000 /* Number of patchbits */ | |
| #define PCS_MICRONUM 0x400 /* Number of Microcode locations */ | |
| #define PCS_PATCHADDR 0xf00000 /* Beginning addr of patchbits */ | |
| #define PCS_PCSADDR 0x8000 /* offset to pcs */ | |
| #define PCS_PATCHENBIT 0xF0C000 /* Patch Enable register */ | |
| #define PCS_ENABLE 0xfff00000 /* enable pcs */ | |
| /* System registers */ | |
| uint32 nexus_req[NEXUS_HLVL]; /* nexus int req */ | |
| uint32 cmi_err = 0; | |
| uint32 cmi_cadr = 0; | |
| char cpu_boot_cmd[CBUFSIZE] = { 0 }; /* boot command */ | |
| int32 sys_model = 0; | |
| int32 vax750_bootdev = 0; /* 0-A, 1-B, 2-C, 3-D */ | |
| uint32 pcspatchbit = 0; | |
| uint32 vax750_wcsmem[16384]; | |
| static t_stat (*nexusR[NEXUS_NUM])(int32 *dat, int32 ad, int32 md); | |
| static t_stat (*nexusW[NEXUS_NUM])(int32 dat, int32 ad, int32 md); | |
| extern uint32 rom[ROMSIZE/sizeof(uint32)]; /* boot ROM */ | |
| extern int32 tmr_int, tti_int, tto_int, csi_int, cso_int; | |
| t_stat cmi_reset (DEVICE *dptr); | |
| const char *cmi_description (DEVICE *dptr); | |
| void cmi_set_tmo (void); | |
| t_stat vax750_boot (int32 flag, CONST char *ptr); | |
| t_stat vax750_boot_parse (int32 flag, const char *ptr); | |
| t_stat vax750_set_bootdev (UNIT *uptr, int32 val, CONST char *cptr, void *desc); | |
| t_stat vax750_show_bootdev (FILE *st, UNIT *uptr, int32 val, CONST void *desc); | |
| extern int32 iccs_rd (void); | |
| extern int32 nicr_rd (void); | |
| extern int32 icr_rd (t_bool interp); | |
| extern int32 todr_rd (void); | |
| extern int32 rxcs_rd (void); | |
| extern int32 rxdb_rd (void); | |
| extern int32 txcs_rd (void); | |
| extern int32 csrs_rd (void); | |
| extern int32 csrd_rd (void); | |
| extern int32 csts_rd (void); | |
| extern void iccs_wr (int32 dat); | |
| extern void nicr_wr (int32 dat); | |
| extern void todr_wr (int32 dat); | |
| extern void rxcs_wr (int32 dat); | |
| extern void txcs_wr (int32 dat); | |
| extern void txdb_wr (int32 dat); | |
| extern void csrs_wr (int32 dat); | |
| extern void csts_wr (int32 dat); | |
| extern void cstd_wr (int32 dat); | |
| extern void init_mbus_tab (void); | |
| extern void init_ubus_tab (void); | |
| extern t_stat build_mbus_tab (DEVICE *dptr, DIB *dibp); | |
| extern t_stat build_ubus_tab (DEVICE *dptr, DIB *dibp); | |
| extern void uba_eval_int (void); | |
| extern int32 uba_get_ubvector (int32 lvl); | |
| extern void uba_ioreset (void); | |
| extern t_stat mctl_populate_rom (const char *rom_filename); | |
| /* CMI data structures | |
| cmi_dev CMI device descriptor | |
| cmi_unit CMI unit | |
| cmi_reg CMI register list | |
| */ | |
| UNIT cmi_unit = { UDATA (NULL, 0, 0) }; | |
| REG cmi_reg[] = { | |
| { HRDATA (NREQ14, nexus_req[0], 16) }, | |
| { HRDATA (NREQ15, nexus_req[1], 16) }, | |
| { HRDATA (NREQ16, nexus_req[2], 16) }, | |
| { HRDATA (NREQ17, nexus_req[3], 16) }, | |
| { HRDATA (CMIERR, cmi_err, 32) }, | |
| { BRDATA (BOOTCMD, cpu_boot_cmd, 16, 8, CBUFSIZE), REG_HRO }, | |
| { NULL } | |
| }; | |
| DEVICE cmi_dev = { | |
| "CMI", &cmi_unit, cmi_reg, NULL, | |
| 1, 16, 16, 1, 16, 8, | |
| NULL, NULL, &cmi_reset, | |
| NULL, NULL, NULL, | |
| NULL, 0, 0, NULL, NULL, NULL, NULL, NULL, NULL, | |
| &cmi_description | |
| }; | |
| /* Special boot command, overrides regular boot */ | |
| CTAB vax750_cmd[] = { | |
| { "BOOT", &vax750_boot, RU_BOOT, | |
| "bo{ot} <device>{/R5:flg} boot device\n" | |
| " type HELP CPU to see bootable devices\n", NULL, &run_cmd_message }, | |
| { NULL } | |
| }; | |
| /* The VAX 11/750 has three sources of interrupts | |
| - internal device interrupts (CPU, console, clock) | |
| - nexus interupts (e.g., memory controller, MBA, UBA) | |
| - external device interrupts (Unibus) | |
| Internal devices vector to fixed SCB locations. | |
| Nexus interrupts vector to an SCB location based on this | |
| formula: SCB_NEXUS + ((IPL - 0x14) * 0x40) + (TR# * 0x4) | |
| External device interrupts do not vector directly. | |
| Instead, the interrupt handler for a given UBA IPL | |
| reads a vector register that contains the Unibus vector | |
| for that IPL. | |
| Find highest priority vectorable interrupt */ | |
| int32 eval_int (void) | |
| { | |
| int32 ipl = PSL_GETIPL (PSL); | |
| int32 i, t; | |
| static const int32 sw_int_mask[IPL_SMAX] = { | |
| 0xFFFE, 0xFFFC, 0xFFF8, 0xFFF0, /* 0 - 3 */ | |
| 0xFFE0, 0xFFC0, 0xFF80, 0xFF00, /* 4 - 7 */ | |
| 0xFE00, 0xFC00, 0xF800, 0xF000, /* 8 - B */ | |
| 0xE000, 0xC000, 0x8000 /* C - E */ | |
| }; | |
| if (hlt_pin) /* hlt pin int */ | |
| return IPL_HLTPIN; | |
| if ((ipl < IPL_MEMERR) && mem_err) /* mem err int */ | |
| return IPL_MEMERR; | |
| if ((ipl < IPL_CRDERR) && crd_err) /* crd err int */ | |
| return IPL_CRDERR; | |
| if ((ipl < IPL_CLKINT) && tmr_int) /* clock int */ | |
| return IPL_CLKINT; | |
| uba_eval_int (); /* update UBA */ | |
| for (i = IPL_HMAX; i >= IPL_HMIN; i--) { /* chk hwre int */ | |
| if (i <= ipl) /* at ipl? no int */ | |
| return 0; | |
| if (nexus_req[i - IPL_HMIN]) /* req != 0? int */ | |
| return i; | |
| } | |
| if ((ipl < IPL_TTINT) && (tti_int || tto_int || csi_int || cso_int)) /* console int */ | |
| return IPL_TTINT; | |
| if (ipl >= IPL_SMAX) /* ipl >= sw max? */ | |
| return 0; | |
| if ((t = SISR & sw_int_mask[ipl]) == 0) | |
| return 0; /* eligible req */ | |
| for (i = IPL_SMAX; i > ipl; i--) { /* check swre int */ | |
| if ((t >> i) & 1) /* req != 0? int */ | |
| return i; | |
| } | |
| return 0; | |
| } | |
| /* Return vector for highest priority hardware interrupt at IPL lvl */ | |
| int32 get_vector (int32 lvl) | |
| { | |
| int32 i, l; | |
| if (lvl == IPL_MEMERR) { /* mem error? */ | |
| mem_err = 0; | |
| return SCB_MEMERR; | |
| } | |
| if (lvl == IPL_CRDERR) { /* CRD error? */ | |
| crd_err = 0; | |
| return SCB_CRDERR; | |
| } | |
| if (lvl == IPL_CLKINT) { /* clock? */ | |
| tmr_int = 0; /* clear req */ | |
| return SCB_INTTIM; /* return vector */ | |
| } | |
| if (lvl > IPL_HMAX) { /* error req lvl? */ | |
| ABORT (STOP_UIPL); /* unknown intr */ | |
| } | |
| if ((lvl <= IPL_HMAX) && (lvl >= IPL_HMIN)) { /* nexus? */ | |
| l = lvl - IPL_HMIN; | |
| if (nexus_req[l] & (1u << TR_UBA)) { /* unibus int? */ | |
| nexus_req[l] = nexus_req[l] & ~(1u << TR_UBA); | |
| return uba_get_ubvector(l); | |
| } | |
| for (i = 0; nexus_req[l] && (i < NEXUS_NUM); i++) { | |
| if ((nexus_req[l] >> i) & 1) { | |
| nexus_req[l] = nexus_req[l] & ~(1u << i); | |
| return SCB_NEXUS + (l << 6) + (i << 2); /* return vector */ | |
| } | |
| } | |
| } | |
| if (lvl == IPL_TTINT) { /* console? */ | |
| if (tti_int) { /* input? */ | |
| tti_int = 0; /* clear req */ | |
| return SCB_TTI; /* return vector */ | |
| } | |
| if (tto_int) { /* output? */ | |
| tto_int = 0; /* clear req */ | |
| return SCB_TTO; /* return vector */ | |
| } | |
| if (csi_int) { /* input? */ | |
| csi_int = 0; /* clear req */ | |
| return SCB_CSI; /* return vector */ | |
| } | |
| if (cso_int) { /* output? */ | |
| cso_int = 0; /* clear req */ | |
| return SCB_CSO; /* return vector */ | |
| } | |
| } | |
| return 0; | |
| } | |
| /* Read 750-specific IPR's */ | |
| int32 ReadIPR (int32 rg) | |
| { | |
| int32 val; | |
| switch (rg) { | |
| case MT_ICCS: /* ICCS */ | |
| val = iccs_rd (); | |
| break; | |
| case MT_NICR: /* NICR */ | |
| val = nicr_rd (); | |
| break; | |
| case MT_ICR: /* ICR */ | |
| val = icr_rd (FALSE); | |
| break; | |
| case MT_TODR: /* TODR */ | |
| val = todr_rd (); | |
| break; | |
| case MT_ACCS: /* ACCS (not impl) */ | |
| val = 0; | |
| break; | |
| case MT_RXCS: /* RXCS */ | |
| val = rxcs_rd (); | |
| break; | |
| case MT_RXDB: /* RXDB */ | |
| val = rxdb_rd (); | |
| break; | |
| case MT_TXCS: /* TXCS */ | |
| val = txcs_rd (); | |
| break; | |
| case MT_CADR: /* CADR */ | |
| val = cmi_cadr; | |
| break; | |
| case MT_CAER: /* CAER (not impl) */ | |
| val = 0; | |
| break; | |
| case MT_MCESR: /* MCESR (not impl) */ | |
| val = 0; | |
| break; | |
| case MT_CMIE: /* CMIE */ | |
| val = cmi_err; | |
| break; | |
| case MT_CSRS: /* CSRS */ | |
| val = csrs_rd (); | |
| break; | |
| case MT_CSRD: /* CSRD */ | |
| val = csrd_rd (); | |
| break; | |
| case MT_CSTS: /* CSTS */ | |
| val = csts_rd (); | |
| break; | |
| case MT_TBDR: /* TBDR */ | |
| val = 0; | |
| break; | |
| case MT_SID: /* SID */ | |
| val = VAX750_SID | VAX750_MICRO | VAX750_HWREV; | |
| break; | |
| default: | |
| RSVD_OPND_FAULT; | |
| } | |
| return val; | |
| } | |
| /* Write 750-specific IPR's */ | |
| void WriteIPR (int32 rg, int32 val) | |
| { | |
| switch (rg) { | |
| case MT_ICCS: /* ICCS */ | |
| iccs_wr (val); | |
| break; | |
| case MT_NICR: /* NICR */ | |
| nicr_wr (val); | |
| break; | |
| case MT_TODR: /* TODR */ | |
| todr_wr (val); | |
| break; | |
| case MT_ACCS: /* ACCS (not impl) */ | |
| break; | |
| case MT_RXCS: /* RXCS */ | |
| rxcs_wr (val); | |
| break; | |
| case MT_TXCS: /* TXCS */ | |
| txcs_wr (val); | |
| break; | |
| case MT_TXDB: /* TXDB */ | |
| txdb_wr (val); | |
| break; | |
| case MT_CADR: /* CADR */ | |
| cmi_cadr = (val & 0x1); | |
| break; | |
| case MT_CAER: /* CAER (not impl) */ | |
| break; | |
| case MT_MCESR: /* MCESR (not impl) */ | |
| break; | |
| case MT_IORESET: /* IORESET */ | |
| uba_ioreset (); | |
| break; | |
| case MT_CSRS: /* CSRS */ | |
| csrs_wr (val); | |
| break; | |
| case MT_CSTS: /* CSTS */ | |
| csts_wr (val); | |
| break; | |
| case MT_CSTD: /* CSTD */ | |
| cstd_wr (val); | |
| break; | |
| case MT_TBDR: /* TBDR */ | |
| break; | |
| default: | |
| RSVD_OPND_FAULT; | |
| } | |
| return; | |
| } | |
| /* ReadReg - read register space | |
| Inputs: | |
| pa = physical address | |
| lnt = length (BWLQ) | |
| Output: | |
| longword of data | |
| */ | |
| int32 ReadReg (uint32 pa, int32 lnt) | |
| { | |
| int32 nexus, val; | |
| if (ADDR_IS_REG (pa)) { /* reg space? */ | |
| if (pa < NEXUSBASE) { | |
| val = (int32)vax750_wcsmem[((pa-REGBASE)>>2)]; | |
| SET_IRQL; | |
| return val; | |
| } | |
| else { /* Nexus register reference */ | |
| nexus = NEXUS_GETNEX (pa); /* get nexus */ | |
| if (nexusR[nexus] && /* valid? */ | |
| (nexusR[nexus] (&val, pa, lnt) == SCPE_OK)) { | |
| SET_IRQL; | |
| return val; | |
| } | |
| } | |
| } | |
| cmi_set_tmo (); /* timeout */ | |
| MACH_CHECK (MCHK_BPE); /* machine check */ | |
| return 0; | |
| } | |
| /* WriteReg - write register space | |
| Inputs: | |
| pa = physical address | |
| val = data to write, right justified in 32b longword | |
| lnt = length (BWLQ) | |
| Outputs: | |
| none | |
| */ | |
| void WriteReg (uint32 pa, int32 val, int32 lnt) | |
| { | |
| int32 nexus; | |
| if (ADDR_IS_REG (pa)) { /* reg space? */ | |
| if (pa < NEXUSBASE) { | |
| if (pa == PCS_PATCHENBIT) { | |
| pcspatchbit = val; | |
| SET_IRQL; | |
| return; | |
| } | |
| else { | |
| vax750_wcsmem[((pa-REGBASE)>>2)] = val; | |
| SET_IRQL; | |
| return; | |
| } | |
| } | |
| else { /* Nexus register reference */ | |
| nexus = NEXUS_GETNEX (pa); /* get nexus */ | |
| if (nexusW[nexus] && /* valid? */ | |
| (nexusW[nexus] (val, pa, lnt) == SCPE_OK)) { | |
| SET_IRQL; | |
| return; | |
| } | |
| } | |
| } | |
| cmi_set_tmo (); /* timeout */ | |
| mem_err = 1; /* interrupt */ | |
| SET_IRQL; | |
| return; | |
| } | |
| /* Set CMI timeout */ | |
| void cmi_set_tmo () | |
| { | |
| if ((cmi_err & CMIERR_ME) == 0) { /* not yet set? */ | |
| if (mchk_ref == REF_V) /* virt? add mode */ | |
| cmi_err |= CMIERR_REF | (PSL_GETCUR (PSL) << CMIERR_V_MODE); | |
| cmi_err |= CMIERR_ME; /* set tmo flag */ | |
| } | |
| else cmi_err |= CMIERR_LEB; /* yes, multiple */ | |
| return; | |
| } | |
| /* Machine check | |
| Error status word format | |
| <2:0> = ASTLVL | |
| <3> = PME | |
| <6:4> = arith trap code | |
| Rest will be zero | |
| */ | |
| int32 machine_check (int32 p1, int32 opc, int32 cc, int32 delta) | |
| { | |
| int32 acc; | |
| if (in_ie) /* in exc? panic */ | |
| ABORT (STOP_INIE); | |
| if (p1 == MCHK_BPE) /* bus error? */ | |
| cc = intexc (SCB_MCHK, cc, 0, IE_EXC); /* take normal exception */ | |
| else | |
| cc = intexc (SCB_MCHK, cc, 0, IE_SVE); /* take severe exception */ | |
| acc = ACC_MASK (KERN); /* in kernel mode */ | |
| in_ie = 1; | |
| SP = SP - 44; /* push 11 words */ | |
| Write (SP, 40, L_LONG, WA); /* # bytes */ | |
| Write (SP + 4, p1, L_LONG, WA); /* error code */ | |
| Write (SP + 8, mchk_va, L_LONG, WA); /* VA register */ | |
| Write (SP + 12, 0, L_LONG, WA); /* Fault PC */ | |
| Write (SP + 16, 0, L_LONG, WA); /* MDR */ | |
| Write (SP + 20, 0, L_LONG, WA); /* saved mode reg */ | |
| Write (SP + 24, 0, L_LONG, WA); /* read lock timeout */ | |
| Write (SP + 28, 0, L_LONG, WA); /* TB group parity error reg */ | |
| Write (SP + 32, 0, L_LONG, WA); /* cache error reg */ | |
| Write (SP + 36, cmi_err, L_LONG, WA); /* bus error reg */ | |
| Write (SP + 40, 0, L_LONG, WA); /* MCESR */ | |
| in_ie = 0; | |
| cmi_err = cmi_err & ~CMIERR_ME; /* clr CMIERR<me> etc */ | |
| return cc; | |
| } | |
| /* Console entry - only reached if CONHALT is set (AUTORESTART is set) */ | |
| int32 con_halt (int32 code, int32 cc) | |
| { | |
| if ((cpu_boot_cmd[0] == 0) || /* saved boot cmd? */ | |
| (vax750_boot_parse (0, cpu_boot_cmd) != SCPE_OK) || /* reparse the boot cmd */ | |
| (reset_all (0) != SCPE_OK) || /* reset the world */ | |
| (cpu_boot (0, NULL) != SCPE_OK)) /* set up boot code */ | |
| ABORT (STOP_BOOT); /* any error? */ | |
| sim_printf ("Rebooting...\n"); | |
| return cc; | |
| } | |
| #define BOOT_A 0 | |
| #define BOOT_B 1 | |
| #define BOOT_C 2 | |
| #define BOOT_D 3 | |
| /* VAX-11/750 boot device definitions */ | |
| struct boot_dev { | |
| const char *devname; | |
| const char *romdevalias; | |
| const char *bootcodefile; | |
| int32 bootdev; | |
| int32 code; | |
| int32 let; | |
| }; | |
| static struct boot_dev boot_tab[] = { | |
| { "RQB", "DUB", NULL, 0, BOOT_UDA, 1 << 24 }, /* DUBn */ | |
| { "RQC", "DUC", NULL, 0, BOOT_UDA, 1 << 24 }, /* DUCn */ | |
| { "RQD", "DUD", NULL, 0, BOOT_UDA, 1 << 24 }, /* DUDn */ | |
| { "RQ", "DUA", "ka750_new.bin", BOOT_C, BOOT_UDA, 1 << 24 }, /* DUAn */ | |
| { "RQ", "DU", "ka750_new.bin", BOOT_C, 0, 0 }, /* DUAn */ | |
| { "RP", "DBA", "ka750_new.bin", BOOT_B, BOOT_MB, 0 }, /* DBAn */ | |
| { "RP", "DB", "ka750_new.bin", BOOT_B, 0, 0 }, /* DBAn */ | |
| { "RP", "DRA", "ka750_new.bin", BOOT_B, BOOT_MB, 0 }, /* DRAn */ | |
| { "RP", "DR", "ka750_new.bin", BOOT_B, 0, 0 }, /* DRAn */ | |
| { "HK", "DMA", "ka750_old.bin", BOOT_B, BOOT_HK, 0 }, /* DMAn */ | |
| { "HK", "DM", "ka750_old.bin", BOOT_B, 0, 0 }, /* DMAn */ | |
| { "RL", "DLA", "ka750_old.bin", BOOT_C, BOOT_RL, 0 }, /* DLAn */ | |
| { "RL", "DL", "ka750_old.bin", BOOT_C, 0, 0 }, /* DLAn */ | |
| { "TD", "DDA", "ka750_new.bin", BOOT_A, BOOT_TD, 0 }, /* DDAn */ | |
| { "TD", "DD", "ka750_new.bin", BOOT_A, 0, 0 }, /* DDAn */ | |
| { NULL } | |
| }; | |
| /* Special boot command - linked into SCP by initial reset | |
| Syntax: BOOT <device>{/R5:val} | |
| Sets up R0-R5, calls SCP boot processor with effective BOOT CPU | |
| */ | |
| t_stat vax750_boot (int32 flag, CONST char *ptr) | |
| { | |
| t_stat r; | |
| r = vax750_boot_parse (flag, ptr); /* parse the boot cmd */ | |
| if (r != SCPE_OK) { /* error? */ | |
| if (r >= SCPE_BASE) { /* message available? */ | |
| sim_printf ("%s\n", sim_error_text (r)); | |
| r |= SCPE_NOMESSAGE; | |
| } | |
| return r; | |
| } | |
| strncpy (cpu_boot_cmd, ptr, CBUFSIZE); /* save for reboot */ | |
| return run_cmd (flag, "CPU"); | |
| } | |
| /* Parse boot command, set up registers - also used on reset */ | |
| t_stat vax750_boot_parse (int32 flag, const char *ptr) | |
| { | |
| char gbuf[CBUFSIZE], dbuf[CBUFSIZE], rbuf[CBUFSIZE]; | |
| char *slptr; | |
| const char *regptr; | |
| int32 i, r5v, unitno; | |
| DEVICE *dptr; | |
| UNIT *uptr; | |
| t_stat r; | |
| if (ptr && (*ptr == '/')) { /* handle "BOOT /R5:n DEV" format */ | |
| ptr = get_glyph (ptr, rbuf, 0); /* get glyph */ | |
| regptr = rbuf; | |
| ptr = get_glyph (ptr, gbuf, 0); /* get glyph */ | |
| } | |
| else { /* handle "BOOT DEV /R5:n" format */ | |
| regptr = get_glyph (ptr, gbuf, 0); /* get glyph */ | |
| if ((slptr = strchr (gbuf, '/'))) { /* found slash? */ | |
| regptr = strchr (ptr, '/'); /* locate orig */ | |
| *slptr = 0; /* zero in string */ | |
| } | |
| } | |
| /* parse R5 parameter value */ | |
| r5v = 0; | |
| if ((strncmp (regptr, "/R5:", 4) == 0) || | |
| (strncmp (regptr, "/R5=", 4) == 0) || | |
| (strncmp (regptr, "/r5:", 4) == 0) || | |
| (strncmp (regptr, "/r5=", 4) == 0)) { | |
| r5v = (int32) get_uint (regptr + 4, 16, LMASK, &r); | |
| if (r != SCPE_OK) | |
| return r; | |
| } | |
| else if (*regptr == '/') { | |
| r5v = (int32) get_uint (regptr + 1, 16, LMASK, &r); | |
| if (r != SCPE_OK) | |
| return r; | |
| } | |
| else if (*regptr != 0) | |
| return SCPE_ARG; | |
| if (gbuf[0]) { | |
| unitno = -1; | |
| for (i = 0; boot_tab[i].devname != NULL; i++) { | |
| /* ROM device name specified use ROM to boot */ | |
| if (memcmp (gbuf, boot_tab[i].romdevalias, strlen(boot_tab[i].romdevalias)) == 0) { | |
| if (memcmp (gbuf, ((char *)rom) + (0x100 * boot_tab[i].bootdev), 2)) { | |
| r = mctl_populate_rom (boot_tab[i].bootcodefile); | |
| if (r != SCPE_OK) | |
| return r; | |
| vax750_bootdev = boot_tab[i].bootdev; | |
| } | |
| sprintf(dbuf, "%s%s", boot_tab[i].devname, gbuf + strlen(boot_tab[i].romdevalias)); | |
| dptr = find_unit (dbuf, &uptr); | |
| if ((dptr == NULL) || (uptr == NULL)) | |
| return SCPE_ARG; | |
| unitno = (int32) (uptr - dptr->units); | |
| /* Page 2-16 of VAX750 Student Training suggests the following register state: */ | |
| R[1] = (NEXUSBASE + (TR_MBA0 * (1 << REG_V_NEXUS))); /* MBA Address */ | |
| R[2] = IOPAGEBASE; /* UBA I/O Page Address */ | |
| R[3] = unitno; /* Boot Device Unit Number */ | |
| R[5] = r5v; /* Boot Flags */ | |
| SP = 0x200; | |
| PC = 0xFA02 + 0x100*vax750_bootdev; | |
| } | |
| /* SCP device name specified use VMB to boot */ | |
| if ((unitno == -1) && | |
| (memcmp (gbuf, boot_tab[i].devname, strlen(boot_tab[i].devname)) == 0)) { | |
| DIB *dibp; | |
| uint32 ba; | |
| sprintf(dbuf, "%s%s", boot_tab[i].devname, gbuf + strlen(boot_tab[i].devname)); | |
| dptr = find_unit (dbuf, &uptr); | |
| if ((dptr == NULL) || (uptr == NULL)) | |
| return SCPE_ARG; | |
| unitno = (int32) (uptr - dptr->units); | |
| dibp = (DIB *) dptr->ctxt; /* get DIB */ | |
| if (dibp == NULL) | |
| ba = 0; | |
| else | |
| ba = dibp->ba; | |
| R[0] = boot_tab[i].code; | |
| if (dptr->flags & DEV_MBUS) { | |
| R[1] = (NEXUSBASE + (TR_MBA0 * (1 << REG_V_NEXUS))); | |
| R[2] = unitno; | |
| } | |
| else { | |
| R[1] = ba; | |
| R[2] = (ba & UBADDRMASK); | |
| } | |
| R[3] = unitno; | |
| R[4] = 0; | |
| R[5] = r5v; | |
| PC = SP = 0x200; | |
| } | |
| if (unitno == -1) | |
| continue; | |
| return SCPE_OK; | |
| } | |
| } | |
| else { | |
| if (!(*rom)) { /* ROM loaded? */ | |
| for (i=0; boot_tab[i].devname; i++) { /* Find a ROM file name */ | |
| if (boot_tab[i].bootcodefile) | |
| break; | |
| } | |
| r = mctl_populate_rom (boot_tab[i].bootcodefile); | |
| if (r != SCPE_OK) | |
| return r; | |
| } | |
| /* Page 2-16 of VAX750 Student Training suggests the following register state: */ | |
| unitno = 0; | |
| R[0] = 0; | |
| R[1] = (NEXUSBASE + (TR_MBA0 * (1 << REG_V_NEXUS))); /* MBA Address */ | |
| R[2] = IOPAGEBASE; /* UBA I/O Page Address */ | |
| R[3] = unitno; /* Boot Device Unit Number */ | |
| R[5] = r5v; /* Boot Flags */ | |
| SP = 0x200; | |
| PC = 0xFA02 + 0x100*vax750_bootdev; | |
| return SCPE_OK; | |
| } | |
| return SCPE_NOFNC; | |
| } | |
| /* Bootstrap - finish up bootstrap process */ | |
| t_stat cpu_boot (int32 unitno, DEVICE *dptr) | |
| { | |
| t_stat r; | |
| if (PC == 0x200) { /* Use VMB directly to boot */ | |
| r = cpu_load_bootcode (BOOT_CODE_FILENAME, BOOT_CODE_ARRAY, BOOT_CODE_SIZE, FALSE, 0x200); | |
| if (r != SCPE_OK) | |
| return r; | |
| } | |
| else /* Boot ROM boot */ | |
| memcpy (&M[0xFA00>>2], rom, ROMSIZE); | |
| return SCPE_OK; | |
| } | |
| t_stat vax750_set_bootdev (UNIT *uptr, int32 val, CONST char *cptr, void *desc) | |
| { | |
| if ((!cptr) || (!*cptr || (*cptr < 'A') || (*cptr > 'D'))) | |
| return SCPE_ARG; | |
| vax750_bootdev = *cptr - 'A'; | |
| return SCPE_OK; | |
| } | |
| t_stat vax750_show_bootdev (FILE *st, UNIT *uptr, int32 val, CONST void *desc) | |
| { | |
| int i; | |
| fprintf (st, "bootdev=%c", 'A' + vax750_bootdev); | |
| if (*rom) { | |
| fprintf (st, "("); | |
| for (i=0; i<4; i++) | |
| if ((*((char *)rom) + (0x100 * i)) && (*(((char *)rom) + (0x100 * i) + 2))) | |
| fprintf (st, "%s%c=%c%cA0", (i != 0) ? "," : "", 'A' + i, *(((char *)rom) + (0x100 * i) + 1), *(((char *)rom) + (0x100 * i))); | |
| fprintf (st, ")"); | |
| } | |
| return SCPE_OK; | |
| } | |
| /* CMI reset */ | |
| t_stat cmi_reset (DEVICE *dptr) | |
| { | |
| sim_vm_cmd = vax750_cmd; | |
| cmi_err = CMIERR_EN; | |
| cmi_cadr = 0; | |
| return SCPE_OK; | |
| } | |
| const char *cmi_description (DEVICE *dptr) | |
| { | |
| return "CPU/Memory interconnect"; | |
| } | |
| /* Show nexus */ | |
| t_stat show_nexus (FILE *st, UNIT *uptr, int32 val, CONST void *desc) | |
| { | |
| fprintf (st, "nexus=%d, address=%X", val, NEXUSBASE + ((1 << REG_V_NEXUS) * val)); | |
| return SCPE_OK; | |
| } | |
| /* Init nexus tables */ | |
| void init_nexus_tab (void) | |
| { | |
| uint32 i; | |
| for (i = 0; i < NEXUS_NUM; i++) { | |
| nexusR[i] = NULL; | |
| nexusW[i] = NULL; | |
| } | |
| return; | |
| } | |
| /* Build nexus tables | |
| Inputs: | |
| dptr = pointer to device | |
| dibp = pointer to DIB | |
| Outputs: | |
| status | |
| */ | |
| t_stat build_nexus_tab (DEVICE *dptr, DIB *dibp) | |
| { | |
| uint32 idx; | |
| if ((dptr == NULL) || (dibp == NULL)) | |
| return SCPE_IERR; | |
| idx = dibp->ba; | |
| if (idx >= NEXUS_NUM) | |
| return SCPE_IERR; | |
| if ((nexusR[idx] && dibp->rd && /* conflict? */ | |
| (nexusR[idx] != dibp->rd)) || | |
| (nexusW[idx] && dibp->wr && | |
| (nexusW[idx] != dibp->wr))) { | |
| sim_printf ("Nexus %s conflict at %d\n", sim_dname (dptr), dibp->ba); | |
| return SCPE_STOP; | |
| } | |
| if (dibp->rd) /* set rd dispatch */ | |
| nexusR[idx] = dibp->rd; | |
| if (dibp->wr) /* set wr dispatch */ | |
| nexusW[idx] = dibp->wr; | |
| return SCPE_OK; | |
| } | |
| /* Build dib_tab from device list */ | |
| t_stat build_dib_tab (void) | |
| { | |
| uint32 i; | |
| DEVICE *dptr; | |
| DIB *dibp; | |
| t_stat r; | |
| init_nexus_tab (); | |
| init_ubus_tab (); | |
| init_mbus_tab (); | |
| for (i = 0; (dptr = sim_devices[i]) != NULL; i++) { /* loop thru dev */ | |
| dibp = (DIB *) dptr->ctxt; /* get DIB */ | |
| if (dibp && !(dptr->flags & DEV_DIS)) { /* defined, enabled? */ | |
| if (dptr->flags & DEV_NEXUS) { /* Nexus? */ | |
| if ((r = build_nexus_tab (dptr, dibp))) /* add to dispatch table */ | |
| return r; | |
| } | |
| else if (dptr->flags & DEV_MBUS) { /* Massbus? */ | |
| if ((r = build_mbus_tab (dptr, dibp))) | |
| return r; | |
| } | |
| else { /* no, Unibus device */ | |
| if ((r = build_ubus_tab (dptr, dibp))) /* add to dispatch tab */ | |
| return r; | |
| } /* end else */ | |
| } /* end if enabled */ | |
| } /* end for */ | |
| return SCPE_OK; | |
| } | |
| t_stat cpu_print_model (FILE *st) | |
| { | |
| fprintf (st, "VAX 11/750"); | |
| return SCPE_OK; | |
| } | |
| t_stat cpu_model_help (FILE *st, DEVICE *dptr, UNIT *uptr, int32 flag, const char *cptr) | |
| { | |
| fprintf (st, "Initial memory size is 2MB.\n\n"); | |
| fprintf (st, "The simulator is booted with the BOOT command:\n\n"); | |
| fprintf (st, " sim> BO{OT} <device>{/R5:flags}\n\n"); | |
| fprintf (st, "if <device> specifies a simh device name, VMB will be loaded and used to\n"); | |
| fprintf (st, "to start the system.\n"); | |
| fprintf (st, "If <device> specifies a traditional VAX 750 Console Device name the Console\n"); | |
| fprintf (st, "Boot ROM Boot Block Boot will be used to start the system.\n"); | |
| fprintf (st, "Boot ROM <device> names are one of:\n\n"); | |
| fprintf (st, " DUAn to boot from rqn\n"); | |
| fprintf (st, " DUn to boot from rqn\n"); | |
| fprintf (st, " DBAn to boot from rpn\n"); | |
| fprintf (st, " DBn to boot from rpn\n"); | |
| fprintf (st, " DRAn to boot from rpn\n"); | |
| fprintf (st, " DRn to boot from rpn\n"); | |
| fprintf (st, " DMAn to boot from hkn\n"); | |
| fprintf (st, " DMn to boot from hkn\n"); | |
| fprintf (st, " DLAn to boot from rln\n"); | |
| fprintf (st, " DLn to boot from rln\n"); | |
| fprintf (st, " DDAn to boot from td (TU58)\n"); | |
| fprintf (st, " DDn to boot from td (TU58)\n\n"); | |
| fprintf (st, "VMB boot <device> names are one of:\n\n"); | |
| fprintf (st, " RPn to boot from rpn\n"); | |
| fprintf (st, " HKn to boot from hkn\n"); | |
| fprintf (st, " RLn to boot from rln\n"); | |
| fprintf (st, " RQn to boot from rqn\n"); | |
| fprintf (st, " RQBn to boot from rqbn\n"); | |
| fprintf (st, " RQCn to boot from rqcn\n"); | |
| fprintf (st, " RQDn to boot from rqdn\n"); | |
| fprintf (st, " TDn to boot from tdn (TU58)\n\n"); | |
| return SCPE_OK; | |
| } |