| /* id_uvc.c: Interdata universal clock | |
| Copyright (c) 2001-2012, 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. | |
| pic precision incremental clock | |
| lfc line frequency clock | |
| 18-Apr-12 RMS Added lfc_cosched routine | |
| 18-Jun-07 RMS Added UNIT_IDLE flag | |
| 18-Oct-06 RMS Changed LFC to be free running, export tmr_poll | |
| 23-Jul-05 RMS Fixed {} error in OC | |
| 01-Mar-03 RMS Added SET/SHOW LFC FREQ support | |
| Changed precision clock algorithm for V7 UNIX | |
| */ | |
| #include "id_defs.h" | |
| #include <ctype.h> | |
| /* Device definitions */ | |
| #define UNIT_V_DIAG (UNIT_V_UF + 0) /* diag mode */ | |
| #define UNIT_DIAG (1 << UNIT_V_DIAG) | |
| #define STA_OVF 0x08 /* PIC overflow */ | |
| #define CMD_STRT 0x20 /* start */ | |
| #define PIC_V_RATE 12 /* rate */ | |
| #define PIC_M_RATE 0xF | |
| #define PIC_RATE (PIC_M_RATE << PIC_V_RATE) | |
| #define PIC_CTR 0x0FFF /* PIC counters */ | |
| #define GET_RATE(x) (((x) >> PIC_V_RATE) & PIC_M_RATE) | |
| #define GET_CTR(x) ((x) & PIC_CTR) | |
| #define PIC_TPS 1000 | |
| extern uint32 int_req[INTSZ], int_enb[INTSZ]; | |
| int32 pic_db = 0; /* output buf */ | |
| int32 pic_ric = 0; /* reset count */ | |
| int32 pic_cic = 0; /* current count */ | |
| uint32 pic_save = 0; /* saved time */ | |
| uint32 pic_ovf = 0; /* overflow */ | |
| uint32 pic_rdp = 0; | |
| uint32 pic_wdp = 0; | |
| uint32 pic_cnti = 0; /* instr/timer */ | |
| uint32 pic_arm = 0; /* int arm */ | |
| uint32 pic_decr = 1; /* decrement */ | |
| uint16 pic_time[4] = { 1, 10, 100, 1000 }; /* delays */ | |
| uint16 pic_usec[4] = { 1, 10, 100, 1000 }; /* usec per tick */ | |
| static int32 pic_map[16] = { /* map rate to delay */ | |
| 0, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 | |
| }; | |
| DEVICE pic_dev; | |
| uint32 pic (uint32 dev, uint32 op, uint32 dat); | |
| t_stat pic_svc (UNIT *uptr); | |
| t_stat pic_reset (DEVICE *dptr); | |
| void pic_sched (t_bool strt); | |
| uint32 pic_rd_cic (void); | |
| int32 lfc_tps = 120; /* ticks per */ | |
| int32 lfc_poll = 8000; | |
| uint32 lfc_arm = 0; /* int arm */ | |
| DEVICE lfc_dev; | |
| uint32 lfc (uint32 dev, uint32 op, uint32 dat); | |
| t_stat lfc_svc (UNIT *uptr); | |
| t_stat lfc_reset (DEVICE *dptr); | |
| t_stat lfc_set_freq (UNIT *uptr, int32 val, char *cptr, void *desc); | |
| t_stat lfc_show_freq (FILE *st, UNIT *uptr, int32 val, void *desc); | |
| /* PIC data structures | |
| pic_dev PIC device descriptor | |
| pic_unit PIC unit descriptor | |
| pic_reg PIC register list | |
| */ | |
| DIB pic_dib = { d_PIC, -1, v_PIC, NULL, &pic, NULL }; | |
| UNIT pic_unit = { UDATA (&pic_svc, UNIT_IDLE, 0), 1000 }; | |
| REG pic_reg[] = { | |
| { HRDATA (BUF, pic_db, 16) }, | |
| { HRDATA (RIC, pic_ric, 16) }, | |
| { HRDATA (CIC, pic_cic, 12) }, | |
| { FLDATA (RDP, pic_rdp, 0) }, | |
| { FLDATA (WDP, pic_wdp, 0) }, | |
| { FLDATA (OVF, pic_ovf, 0) }, | |
| { FLDATA (IREQ, int_req[l_PIC], i_PIC) }, | |
| { FLDATA (IENB, int_enb[l_PIC], i_PIC) }, | |
| { FLDATA (IARM, pic_arm, 0) }, | |
| { BRDATA (TIME, pic_time, 10, 16, 4), REG_NZ + PV_LEFT }, | |
| { DRDATA (SAVE, pic_save, 32), REG_HRO + PV_LEFT }, | |
| { DRDATA (DECR, pic_decr, 16), REG_HRO + PV_LEFT }, | |
| { FLDATA (MODE, pic_cnti, 0), REG_HRO }, | |
| { HRDATA (DEVNO, pic_dib.dno, 8), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB pic_mod[] = { | |
| { UNIT_DIAG, UNIT_DIAG, "diagnostic mode", "DIAG", NULL }, | |
| { UNIT_DIAG, 0, NULL, "NORMAL", NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", | |
| &set_dev, &show_dev, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE pic_dev = { | |
| "PIC", &pic_unit, pic_reg, pic_mod, | |
| 1, 0, 0, 0, 0, 0, | |
| NULL, NULL, &pic_reset, | |
| NULL, NULL, NULL, | |
| &pic_dib, DEV_DISABLE | |
| }; | |
| /* LFC data structures | |
| lfc_dev LFC device descriptor | |
| lfc_unit LFC unit descriptor | |
| lfc_reg LFC register list | |
| */ | |
| DIB lfc_dib = { d_LFC, -1, v_LFC, NULL, &lfc, NULL }; | |
| UNIT lfc_unit = { UDATA (&lfc_svc, UNIT_IDLE, 0), 8333 }; | |
| REG lfc_reg[] = { | |
| { FLDATA (IREQ, int_req[l_LFC], i_LFC) }, | |
| { FLDATA (IENB, int_enb[l_LFC], i_LFC) }, | |
| { FLDATA (IARM, lfc_arm, 0) }, | |
| { DRDATA (TIME, lfc_unit.wait, 24), REG_NZ + PV_LEFT }, | |
| { DRDATA (TPS, lfc_tps, 8), PV_LEFT + REG_HRO }, | |
| { HRDATA (DEVNO, lfc_dib.dno, 8), REG_HRO }, | |
| { NULL } | |
| }; | |
| MTAB lfc_mod[] = { | |
| { MTAB_XTD|MTAB_VDV, 100, NULL, "50HZ", | |
| &lfc_set_freq, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 120, NULL, "60HZ", | |
| &lfc_set_freq, NULL, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "FREQUENCY", NULL, | |
| NULL, &lfc_show_freq, NULL }, | |
| { MTAB_XTD|MTAB_VDV, 0, "DEVNO", "DEVNO", | |
| &set_dev, &show_dev, NULL }, | |
| { 0 } | |
| }; | |
| DEVICE lfc_dev = { | |
| "LFC", &lfc_unit, lfc_reg, lfc_mod, | |
| 1, 0, 0, 0, 0, 0, | |
| NULL, NULL, &lfc_reset, | |
| NULL, NULL, NULL, | |
| &lfc_dib, DEV_DISABLE | |
| }; | |
| /* Precision clock: IO routine */ | |
| uint32 pic (uint32 dev, uint32 op, uint32 dat) | |
| { | |
| int32 t; | |
| switch (op) { /* case IO op */ | |
| case IO_ADR: /* select */ | |
| return HW; /* HW capable */ | |
| case IO_RH: /* read halfword */ | |
| pic_rdp = 0; /* clr ptr */ | |
| return pic_rd_cic (); | |
| case IO_RD: /* read */ | |
| t = pic_rd_cic (); /* get cic */ | |
| if (pic_rdp) /* 2nd? get lo */ | |
| t = t & DMASK8; | |
| else t = (t >> 8) & DMASK8; /* 1st? get hi */ | |
| pic_rdp = pic_rdp ^ 1; /* flip byte ptr */ | |
| return t; | |
| case IO_WH: /* write halfword */ | |
| pic_wdp = 0; /* clr ptr */ | |
| pic_db = dat; | |
| break; | |
| case IO_WD: /* write */ | |
| if (pic_wdp) | |
| pic_db = (pic_db & 0xFF00) | dat; | |
| else pic_db = (pic_db & 0xFF) | (dat << 8); | |
| pic_wdp = pic_wdp ^ 1; /* flip byte ptr */ | |
| break; | |
| case IO_SS: /* sense status */ | |
| if (pic_ovf) { /* overflow? */ | |
| pic_ovf = 0; /* clear flag */ | |
| CLR_INT (v_PIC); /* clear intr */ | |
| return STA_OVF; | |
| } | |
| return 0; | |
| case IO_OC: /* output cmd */ | |
| pic_arm = int_chg (v_PIC, dat, pic_arm); /* upd int ctrl */ | |
| if (dat & CMD_STRT) { /* start? */ | |
| pic_ric = pic_db; /* new ric */ | |
| pic_cic = GET_CTR (pic_ric); /* new cic */ | |
| pic_ovf = 0; /* clear flag */ | |
| sim_cancel (&pic_unit); /* stop clock */ | |
| pic_rdp = pic_wdp = 0; /* init ptrs */ | |
| if (pic_ric & PIC_RATE) /* any rate? */ | |
| pic_sched (TRUE); | |
| } /* end if start */ | |
| break; | |
| } /* end case */ | |
| return 0; | |
| } | |
| /* Unit service */ | |
| t_stat pic_svc (UNIT *uptr) | |
| { | |
| t_bool rate_chg = FALSE; | |
| if (pic_cnti) /* one shot? */ | |
| pic_cic = 0; | |
| pic_cic = pic_cic - pic_decr; /* decrement */ | |
| if (pic_cic <= 0) { /* overflow? */ | |
| if (pic_wdp) /* broken wr? set flag */ | |
| pic_ovf = 1; | |
| if (pic_arm) /* if armed, intr */ | |
| SET_INT (v_PIC); | |
| if (GET_RATE (pic_ric) != GET_RATE (pic_db)) /* rate change? */ | |
| rate_chg = TRUE; | |
| pic_ric = pic_db; /* new ric */ | |
| pic_cic = GET_CTR (pic_ric); /* new cic */ | |
| if ((pic_ric & PIC_RATE) == 0) | |
| return SCPE_OK; | |
| } | |
| pic_sched (rate_chg); | |
| return SCPE_OK; | |
| } | |
| /* Schedule next interval | |
| If eff rate < 1ms, or diagnostic mode, count instructions | |
| If eff rate = 1ms, and not diagnostic mode, use timer | |
| */ | |
| void pic_sched (t_bool strt) | |
| { | |
| int32 r, t, intv, intv_usec; | |
| pic_save = sim_grtime (); /* save start */ | |
| r = pic_map[GET_RATE (pic_ric)]; /* get mapped rate */ | |
| intv = pic_cic? pic_cic: 1; /* get cntr */ | |
| intv_usec = intv * pic_usec[r]; /* cvt to usec */ | |
| if (!(pic_unit.flags & UNIT_DIAG) && /* not diag? */ | |
| ((intv_usec % 1000) == 0)) { /* 1ms multiple? */ | |
| pic_cnti = 0; /* clr mode */ | |
| pic_decr = pic_usec[3 - r]; /* set decrement */ | |
| if (strt) /* init or */ | |
| t = sim_rtcn_init (pic_time[3], TMR_PIC); | |
| else t = sim_rtcn_calb (PIC_TPS, TMR_PIC); /* calibrate */ | |
| } | |
| else { | |
| pic_cnti = 1; /* set mode */ | |
| pic_decr = 1; /* decr = 1 */ | |
| t = pic_time[r] * intv; /* interval */ | |
| if (t == 1) /* for diagn */ | |
| t++; | |
| } | |
| sim_activate (&pic_unit, t); /* activate */ | |
| return; | |
| } | |
| /* Read (interpolated) current interval */ | |
| uint32 pic_rd_cic (void) | |
| { | |
| if (sim_is_active (&pic_unit) && pic_cnti) { /* running, one shot? */ | |
| uint32 delta = sim_grtime () - pic_save; /* interval */ | |
| uint32 tm = pic_time[pic_map[GET_RATE (pic_ric)]]; /* ticks/intv */ | |
| delta = delta / tm; /* ticks elapsed */ | |
| if (delta >= ((uint32) pic_cic)) /* cap value */ | |
| return 0; | |
| return pic_cic - delta; | |
| } | |
| return pic_cic; | |
| } | |
| /* Reset routine */ | |
| t_stat pic_reset (DEVICE *dptr) | |
| { | |
| sim_cancel (&pic_unit); /* cancel unit */ | |
| pic_ric = pic_cic = 0; | |
| pic_db = 0; | |
| pic_ovf = 0; /* clear state */ | |
| pic_cnti = 0; | |
| pic_decr = 1; | |
| pic_rdp = pic_wdp = 0; | |
| CLR_INT (v_PIC); /* clear int */ | |
| CLR_ENB (v_PIC); /* disable int */ | |
| pic_arm = 0; /* disarm int */ | |
| return SCPE_OK; | |
| } | |
| /* Line clock: IO routine */ | |
| uint32 lfc (uint32 dev, uint32 op, uint32 dat) | |
| { | |
| switch (op) { /* case IO op */ | |
| case IO_ADR: /* select */ | |
| return BY; /* byte only */ | |
| case IO_OC: /* command */ | |
| lfc_arm = int_chg (v_LFC, dat, lfc_arm); /* upd int ctrl */ | |
| break; | |
| } | |
| return 0; | |
| } | |
| /* Unit service */ | |
| t_stat lfc_svc (UNIT *uptr) | |
| { | |
| lfc_poll = sim_rtcn_calb (lfc_tps, TMR_LFC); /* calibrate */ | |
| sim_activate (uptr, lfc_poll); /* reactivate */ | |
| if (lfc_arm) { /* armed? */ | |
| SET_INT (v_LFC); /* req intr */ | |
| } | |
| return SCPE_OK; | |
| } | |
| /* Clock coscheduling routine */ | |
| int32 lfc_cosched (int32 wait) | |
| { | |
| int32 t; | |
| t = sim_activate_time (&lfc_unit); | |
| return (t? t - 1: wait); | |
| } | |
| /* Reset routine */ | |
| t_stat lfc_reset (DEVICE *dptr) | |
| { | |
| lfc_poll = sim_rtcn_init (lfc_unit.wait, TMR_LFC); | |
| sim_activate (&lfc_unit, lfc_poll); /* init clock */ | |
| CLR_INT (v_LFC); /* clear int */ | |
| CLR_ENB (v_LFC); /* disable int */ | |
| lfc_arm = 0; /* disarm int */ | |
| return SCPE_OK; | |
| } | |
| /* Set frequency */ | |
| t_stat lfc_set_freq (UNIT *uptr, int32 val, char *cptr, void *desc) | |
| { | |
| if (cptr) | |
| return SCPE_ARG; | |
| if ((val != 100) && (val != 120)) | |
| return SCPE_IERR; | |
| lfc_tps = val; | |
| return SCPE_OK; | |
| } | |
| /* Show frequency */ | |
| t_stat lfc_show_freq (FILE *st, UNIT *uptr, int32 val, void *desc) | |
| { | |
| fprintf (st, (lfc_tps == 100)? "50Hz": "60Hz"); | |
| return SCPE_OK; | |
| } | |