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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.s 7.1 (Berkeley) 6/5/86 */ ! 8: ! 9: .set MAJOR,3 /* major("/dev/hk0a") */ ! 10: ! 11: /* ! 12: * RK07 1st level boot program: loads next 7.5Kbytes from ! 13: * boot sector of file system and sets it up to run. ! 14: */ ! 15: .set RELOC,0x50000 ! 16: .set BOOTSIZE,15 /* size of boot in sectors */ ! 17: /* UBA registers */ ! 18: .set UBA_CNFGR,0 /* UBA configuration register */ ! 19: .set UBA_CR,4 /* UBA control register offset */ ! 20: .set UBA_MAP,0x800 /* UBA offset to map reg's */ ! 21: /* RK611 registers and bits */ ! 22: .set HK_cs1,0 /* control and status */ ! 23: .set HK_wc,2 /* word count */ ! 24: .set HK_ba,4 /* bus address */ ! 25: .set HK_da,6 /* disk address */ ! 26: .set HK_cs2,8 /* control and status */ ! 27: .set HK_dc,020 /* desired cylinder */ ! 28: .set HKBPSECT,512 /* bytes per sector */ ! 29: .set HK_GO,1 /* go bit */ ! 30: .set HK_PACK,2 /* pack acknowledge */ ! 31: .set HK_RCOM,020 /* read command */ ! 32: .set HK_SEL7,02000 /* select RK07 disk */ ! 33: .set HK_pRDY,7 /* position of ready bit */ ! 34: .set HK_pERR,15 /* position of error bit */ ! 35: ! 36: init: ! 37: /* r9 UBA address */ ! 38: /* r8 HK addr */ ! 39: .word 0 /* entry mask for dec monitor */ ! 40: nop;nop;nop;nop;nop;nop;nop;nop /* some no-ops for 750 boot to skip */ ! 41: nop;nop; ! 42: movl $MAJOR,r10 /* major("/dev/xx0a") */ ! 43: extzv $18,$1,r1,r9 /* get UBA number from R1 */ ! 44: xorb2 $0x01,r9 /* complement bit */ ! 45: insv r9,$24,$8,r10 /* set UBA number */ ! 46: insv r3,$16,$8,r10 /* drive number */ ! 47: extzv $12,$4,r5,r4 /* get partition from r5 */ ! 48: bicw2 $0xf000,r5 /* remove from r5 */ ! 49: insv r4,$8,$8,r10 /* set partition */ ! 50: movl r5,r11 /* boot flags */ ! 51: movl physUBA[r9],r9 /* UNIBUS adaptor address */ ! 52: movl r2,r8 /* boot device CSR */ ! 53: movl r3,r7 /* unit number */ ! 54: ! 55: /* select unit, init rk611, set vv in drive; if any errors, give up */ ! 56: movw r7,HK_cs2(r8) ! 57: movw $HK_SEL7+HK_GO,HK_cs1(r8) ! 58: 1: ! 59: movw HK_cs1(r8),r0 ! 60: bbc $HK_pRDY,r0,1b ! 61: bbs $HK_pERR,r0,9f ! 62: movw $HK_SEL7+HK_PACK+HK_GO,HK_cs1(r8) ! 63: 1: ! 64: movw HK_cs1(r8),r0 ! 65: bbc $HK_pRDY,r0,1b ! 66: bbc $HK_pERR,r0,start ! 67: 9: ! 68: halt ! 69: /* relocate to high core */ ! 70: start: ! 71: movl r5,r11 /* boot flags */ ! 72: movl $RELOC,sp ! 73: moval init,r6 ! 74: movc3 $end,(r6),(sp) ! 75: jmp *$RELOC+start2 ! 76: /* now running relocated */ ! 77: /* bring in the boot program */ ! 78: .set PROGSIZE,(BOOTSIZE*HKBPSECT) ! 79: start2: ! 80: movw $0,HK_dc(r8) ! 81: movw $1,HK_da(r8) ! 82: movw $-PROGSIZE/2,HK_wc(r8) ! 83: clrl r0 ! 84: 1: ! 85: # bisl3 $0x80000000,r0,UBA_MAP(r9) ! 86: # addl2 $4,r9 ! 87: # aobleq $BOOTSIZE,r0,1b ! 88: clrw HK_ba(r8) ! 89: movw $HK_SEL7+HK_RCOM+HK_GO,HK_cs1(r8) ! 90: hkrdy: ! 91: movw HK_cs1(r8),r0 ! 92: bbc $HK_pRDY,r0,hkrdy ! 93: bbs $HK_pERR,r0,hkerr ! 94: brw done ! 95: hkerr: ! 96: halt /* ungraceful */ ! 97: done: ! 98: movl $PROGSIZE,r3 ! 99: clrcor: ! 100: clrq (r3) ! 101: acbl $RELOC,$8,r3,clrcor ! 102: /* start loaded program */ ! 103: calls $0,*$0 ! 104: brw start2 ! 105: physUBA: ! 106: .long 0xf30000 /* uba0 */ ! 107: .long 0xf32000 /* uba1 */ ! 108: end:
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