projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 9d2503c6 | 1 | /* |
| 763af259 | 2 | * @(#)ka630.c 7.3 (Berkeley) %G% |
| 9d2503c6 BK |
3 | */ |
| 4 | #if defined(VAX630) | |
| 5 | /* ka630.c routines for the ka630 clock chip... */ | |
| 6 | #include "param.h" | |
| 7 | #include "time.h" | |
| 8 | #include "kernel.h" | |
| 9 | #include "vmmac.h" | |
| 10 | ||
| 11 | #include "mtpr.h" | |
| 12 | #include "cpu.h" | |
| 13 | #include "clock.h" | |
| 14 | #include "pte.h" | |
| 15 | #include "ka630.h" | |
| 16 | ||
| 17 | /* | |
| 18 | * These two fuctions handle the tod clock | |
| 19 | * This code is defunct at the end of the century. | |
| 20 | * Will Unix still be here then?? | |
| 21 | */ | |
| 22 | ||
| 46072663 MK |
23 | extern struct cldevice cldevice; |
| 24 | extern struct ka630cpu ka630cpu; | |
| 763af259 | 25 | static int clkinit; |
| 9d2503c6 BK |
26 | |
| 27 | short dayyr[12] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, }; | |
| 28 | /* Starts the tod clock. Called from clkstart... */ | |
| 29 | ka630tod(base) | |
| 30 | time_t base; | |
| 31 | { | |
| 32 | register int tmp1, tmp2; | |
| 9d2503c6 BK |
33 | register struct cldevice *claddr = &cldevice; |
| 34 | struct ka630cpu *ka630addr = &ka630cpu; | |
| 35 | ||
| 36 | /* Enable system page for registers */ | |
| 46072663 MK |
37 | ioaccess(0x200b8000, &Clockmap[0], sizeof(struct cldevice)); |
| 38 | ioaccess(0x20080000, &Ka630map[0], sizeof(struct ka630cpu)); | |
| 763af259 | 39 | clkinit = 1; |
| 46072663 | 40 | |
| 9d2503c6 BK |
41 | /* |
| 42 | * Clear restart and boot in progress flags in the CPMBX. This has | |
| 43 | * nothing to do with the clock except that it the CPMBX reg. is a | |
| 44 | * byte in the clock's ram. | |
| 45 | */ | |
| 46 | claddr->cpmbx=(u_short)((claddr->cpmbx&KA630CLK_LANG)|KA630CLK_REBOOT); | |
| 47 | /* | |
| 48 | * Enable memory parity error detection. again nothing to do with the | |
| 49 | * tod clock except for being a convenient place. | |
| 50 | */ | |
| 51 | ka630addr->ka630_mser = KA630MSER_PAREN; | |
| 52 | claddr->csr1 = KA630CLK_SET; | |
| 53 | while ((claddr->csr0 & KA630CLK_UIP) != 0) | |
| 54 | ; | |
| 55 | /* If the clock is valid, use it. */ | |
| 56 | if ((claddr->csr3 & KA630CLK_VRT) != 0 && | |
| 57 | (claddr->csr1 & KA630CLK_ENABLE) == KA630CLK_ENABLE) { | |
| 58 | /* Convert yr,mon,day,hr,min,sec to sec past Jan.1, 1970. */ | |
| 59 | tmp2 = 0; | |
| 60 | for (tmp1 = 70; tmp1 < claddr->yr; tmp1++) { | |
| 61 | tmp2 += 365; | |
| 62 | /* I just luv leap years... */ | |
| 63 | if (LEAPYEAR(tmp1)) | |
| 64 | tmp2++; | |
| 65 | } | |
| 66 | tmp2 += (dayyr[claddr->mon-1]+claddr->day-1); | |
| 67 | if (LEAPYEAR(claddr->yr) && claddr->mon > 2) | |
| 68 | tmp2++; | |
| 69 | /* Finally got days past Jan. 1,1970. the rest is easy.. */ | |
| 70 | time.tv_sec = tmp2*SECDAY+claddr->hr*HRSEC+ | |
| 71 | claddr->min*MINSEC+claddr->sec; | |
| 72 | tmp1 = claddr->csr2; | |
| 73 | claddr->csr0 = KA630CLK_RATE; | |
| 74 | claddr->csr1 = KA630CLK_ENABLE; | |
| 75 | } else if (base < 5*SECYR) { | |
| 76 | printf("WARNING: preposterous time in file system\n"); | |
| 77 | time.tv_sec = 6*SECYR+186*SECDAY+SECDAY/2; | |
| 78 | ka630stod(); | |
| 79 | } else { | |
| 80 | printf("WARNING: Time set via file system\n"); | |
| 81 | time.tv_sec = base; | |
| 82 | ka630stod(); | |
| 83 | } | |
| 84 | } | |
| 85 | /* Set the time of day clock, called via. stime system call.. */ | |
| 86 | ka630stod() | |
| 87 | { | |
| 88 | register int tmp1, tmp3; | |
| 89 | register struct cldevice *claddr = &cldevice; | |
| 90 | long tmp2, tmp4; | |
| 91 | ||
| 763af259 MK |
92 | if (clkinit == 0) |
| 93 | return; | |
| 9d2503c6 BK |
94 | claddr->csr1 = KA630CLK_SET; |
| 95 | while ((claddr->csr0 & KA630CLK_UIP) != 0) | |
| 96 | ; | |
| 97 | /* The reverse of above, sec. past Jan. 1,1970 to yr, mon... */ | |
| 98 | tmp2 = time.tv_sec/HRSEC; | |
| 99 | tmp4 = tmp2 = tmp2/24; | |
| 100 | tmp1 = 69; | |
| 101 | while (tmp2 >= 0) { | |
| 102 | tmp3 = tmp2; | |
| 103 | tmp2 -= 365; | |
| 104 | tmp1++; | |
| 105 | if (LEAPYEAR(tmp1)) | |
| 106 | tmp2--; | |
| 107 | } | |
| 108 | /* Got the year... */ | |
| 109 | claddr->yr = tmp1; | |
| 110 | tmp1 = -1; | |
| 111 | do { | |
| 112 | tmp2 = tmp3-dayyr[++tmp1]; | |
| 113 | if (LEAPYEAR(claddr->yr) && tmp1 > 1) | |
| 114 | tmp2--; | |
| 115 | } while (tmp2 >= 0); | |
| 116 | /* Finally, got the rest... */ | |
| 117 | claddr->mon = tmp1; | |
| 118 | claddr->day = tmp3-dayyr[tmp1-1]+1; | |
| 119 | if (LEAPYEAR(claddr->yr) && tmp1 > 2) | |
| 120 | claddr->day--; | |
| 121 | tmp2 = time.tv_sec-(tmp4*SECDAY); | |
| 122 | claddr->hr = tmp2/HRSEC; | |
| 123 | tmp2 = tmp2%HRSEC; | |
| 124 | claddr->min = tmp2/MINSEC; | |
| 125 | tmp2 = tmp2%MINSEC; | |
| 126 | claddr->sec = tmp2; | |
| 127 | tmp1 = claddr->csr2; | |
| 128 | tmp1 = claddr->csr3; | |
| 129 | claddr->csr0 = KA630CLK_RATE; | |
| 130 | claddr->csr1 = KA630CLK_ENABLE; | |
| 131 | } | |
| 132 | #endif |