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1.1 ! root 1: /* ! 2: * Copyright (c) 1980, 1986 Regents of the University of California. ! 3: * All rights reserved. The Berkeley software License Agreement ! 4: * specifies the terms and conditions for redistribution. ! 5: */ ! 6: ! 7: /* @(#)hkboot.c 7.2 (Berkeley) 8/28/86 */ ! 8: #include <sys/disklabel.h> ! 9: ! 10: .set MAJOR,3 /* major("/dev/hk0a") */ ! 11: ! 12: /* ! 13: * RK07 1st level boot program: loads next 7.5Kbytes from ! 14: * boot sector of file system and sets it up to run. ! 15: */ ! 16: .set RELOC,0x50000 ! 17: .set BOOTSIZE,15 /* size of boot in sectors */ ! 18: /* UBA registers */ ! 19: .set UBA_CNFGR,0 /* UBA configuration register */ ! 20: .set UBA_CR,4 /* UBA control register offset */ ! 21: .set UBA_MAP,0x800 /* UBA offset to map reg's */ ! 22: /* RK611 registers and bits */ ! 23: .set HK_cs1,0 /* control and status */ ! 24: .set HK_wc,2 /* word count */ ! 25: .set HK_ba,4 /* bus address */ ! 26: .set HK_da,6 /* disk address */ ! 27: .set HK_cs2,8 /* control and status */ ! 28: .set HK_dc,020 /* desired cylinder */ ! 29: .set HKBPSECT,512 /* bytes per sector */ ! 30: .set HK_GO,1 /* go bit */ ! 31: .set HK_PACK,2 /* pack acknowledge */ ! 32: .set HK_RCOM,020 /* read command */ ! 33: .set HK_SEL7,02000 /* select RK07 disk */ ! 34: .set HK_pRDY,7 /* position of ready bit */ ! 35: .set HK_pERR,15 /* position of error bit */ ! 36: ! 37: init: ! 38: /* r9 UBA address */ ! 39: /* r8 HK addr */ ! 40: .word 0 /* entry mask for dec monitor */ ! 41: nop;nop;nop;nop;nop;nop;nop;nop /* some no-ops for 750 boot to skip */ ! 42: nop;nop; ! 43: movl $MAJOR,r10 /* major("/dev/xx0a") */ ! 44: extzv $18,$1,r1,r9 /* get UBA number from R1 */ ! 45: xorb2 $0x01,r9 /* complement bit */ ! 46: insv r9,$24,$8,r10 /* set UBA number */ ! 47: insv r3,$16,$8,r10 /* drive number */ ! 48: extzv $12,$4,r5,r4 /* get partition from r5 */ ! 49: bicw2 $0xf000,r5 /* remove from r5 */ ! 50: insv r4,$8,$8,r10 /* set partition */ ! 51: movl r5,r11 /* boot flags */ ! 52: brw start0 ! 53: ! 54: /* ! 55: * Leave space for pack label. ! 56: */ ! 57: pad: ! 58: .space LABELOFFSET - (pad - init) ! 59: packlabel: ! 60: .space d_end_ ! 61: ! 62: start0: ! 63: movl physUBA[r9],r9 /* UNIBUS adaptor address */ ! 64: movl r2,r8 /* boot device CSR */ ! 65: movl r3,r7 /* unit number */ ! 66: ! 67: /* select unit, init rk611, set vv in drive; if any errors, give up */ ! 68: movw r7,HK_cs2(r8) ! 69: movw $HK_SEL7+HK_GO,HK_cs1(r8) ! 70: 1: ! 71: movw HK_cs1(r8),r0 ! 72: bbc $HK_pRDY,r0,1b ! 73: bbs $HK_pERR,r0,9f ! 74: movw $HK_SEL7+HK_PACK+HK_GO,HK_cs1(r8) ! 75: 1: ! 76: movw HK_cs1(r8),r0 ! 77: bbc $HK_pRDY,r0,1b ! 78: bbc $HK_pERR,r0,start ! 79: 9: ! 80: halt ! 81: /* relocate to high core */ ! 82: start: ! 83: movl r5,r11 /* boot flags */ ! 84: movl $RELOC,sp ! 85: moval init,r6 ! 86: movc3 $end,(r6),(sp) ! 87: jmp *$RELOC+start2 ! 88: /* now running relocated */ ! 89: /* bring in the boot program */ ! 90: .set PROGSIZE,(BOOTSIZE*HKBPSECT) ! 91: start2: ! 92: movw $0,HK_dc(r8) ! 93: movw $1,HK_da(r8) ! 94: movw $-PROGSIZE/2,HK_wc(r8) ! 95: clrl r0 ! 96: 1: ! 97: /* bisl3 $0x80000000,r0,UBA_MAP(r9) */ ! 98: /* addl2 $4,r9 */ ! 99: /* aobleq $BOOTSIZE,r0,1b */ ! 100: clrw HK_ba(r8) ! 101: movw $HK_SEL7+HK_RCOM+HK_GO,HK_cs1(r8) ! 102: hkrdy: ! 103: movw HK_cs1(r8),r0 ! 104: bbc $HK_pRDY,r0,hkrdy ! 105: bbs $HK_pERR,r0,hkerr ! 106: brw done ! 107: hkerr: ! 108: halt /* ungraceful */ ! 109: done: ! 110: movl $PROGSIZE,r3 ! 111: clrcor: ! 112: clrq (r3) ! 113: acbl $RELOC,$8,r3,clrcor ! 114: /* start loaded program */ ! 115: calls $0,*$0 ! 116: brw start2 ! 117: physUBA: ! 118: .long 0xf30000 /* uba0 */ ! 119: .long 0xf32000 /* uba1 */ ! 120: end:
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