Commit | Line | Data |
---|---|---|
cb1c44c2 | 1 | /* |
0880b18e | 2 | * Copyright (c) 1980, 1986 Regents of the University of California. |
cb1c44c2 KM |
3 | * All rights reserved. The Berkeley software License Agreement |
4 | * specifies the terms and conditions for redistribution. | |
5 | */ | |
6 | ||
0880b18e | 7 | /* "@(#)rlboot.c 7.1 (Berkeley) %G%" */ |
a96c16a1 MK |
8 | |
9 | .set MAJOR,14 /* major("/dev/rl0a") */ | |
2639612e SL |
10 | |
11 | /* | |
2e6422fd SL |
12 | * RL02 1st level boot program: loads next 7.5Kbytes from |
13 | * boot sector of file system and sets it up to run. | |
2639612e | 14 | */ |
2e6422fd | 15 | .set BOOTSIZE,15 /* 15 ``sectors'' */ |
2639612e | 16 | .set RELOC,0x50000 |
2639612e | 17 | /* UBA registers */ |
2e6422fd SL |
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 */ | |
2639612e | 21 | /* RL11 registers and bits */ |
2e6422fd SL |
22 | .set HL,0174400-0160000 /* address of RL11 */ |
23 | .set HLBPSECT,512 /* sector size in bytes (kludge) */ | |
24 | .set HL_cs,HL+0 /* control and status */ | |
25 | .set HL_ba,HL+2 /* bus address */ | |
26 | .set HL_da,HL+4 /* disk address */ | |
27 | .set HL_wc,HL+6 /* word count */ | |
a96c16a1 | 28 | .set HL_RDY,0200 /* READY */ |
2e6422fd SL |
29 | .set HL_RCOM,014 /* read command */ |
30 | .set HL_SEEK,06 /* seek */ | |
31 | .set HL_RESET,013 /* reset drive */ | |
32 | .set HL_GSTAT,04 /* get status command */ | |
33 | .set HL_pRDY,7 /* position of ready bit */ | |
34 | .set HL_pERR,15 /* position of error bit */ | |
2639612e SL |
35 | |
36 | init: | |
37 | /* r9 UBA address */ | |
a96c16a1 | 38 | /* r8 RL addr */ |
2e6422fd SL |
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 */ | |
2639612e | 41 | nop;nop; |
a96c16a1 MK |
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 | ashl $8,r7,r7 /* shifted for HL_cs */ | |
55 | ||
56 | /* init rl11, and drive, don't check for any errors now */ | |
57 | movw $HL_RESET,HL_da(r8) | |
58 | bisw3 r7,$HL_GSTAT,HL_cs(r8) | |
2639612e SL |
59 | /* relocate to high core */ |
60 | start: | |
2e6422fd | 61 | movl r5,r11 /* save boot flags */ |
2639612e SL |
62 | movl $RELOC,sp |
63 | moval init,r6 | |
64 | movc3 $end,(r6),(sp) | |
65 | jmp *$RELOC+start2 | |
66 | /* now running relocated */ | |
2e6422fd SL |
67 | /* read in the boot program */ |
68 | .set PROGSIZE,(BOOTSIZE*HLBPSECT) | |
2639612e | 69 | start2: |
a96c16a1 MK |
70 | movw $1,HL_da(r8) /* seek to cylinder 0 */ |
71 | bisw3 r7,$HL_SEEK,HL_cs(r8) | |
2639612e | 72 | 1: |
a96c16a1 | 73 | movw HL_cs(r8),r0 |
2e6422fd SL |
74 | bbc $HL_pRDY,r0,1b |
75 | bbs $HL_pERR,r0,hlerr | |
05ec64d7 | 76 | /* Rl has 256 byte sectors */ |
a96c16a1 MK |
77 | movw $2,HL_da(r8) /* read program */ |
78 | movw $-PROGSIZE/2,HL_wc(r8) | |
2e6422fd | 79 | clrl r0 |
2639612e | 80 | 1: |
2e6422fd SL |
81 | bisl3 $0x80000000,r0,UBA_MAP(r9) |
82 | addl2 $4,r9 | |
83 | aobleq $BOOTSIZE,r0,1b | |
a96c16a1 MK |
84 | clrw HL_ba(r8) |
85 | bisw3 r7,$HL_RCOM,HL_cs(r8) | |
2639612e | 86 | 1: |
a96c16a1 | 87 | movw HL_cs(r8),r0 |
2e6422fd | 88 | bbc $HL_pRDY,r0,1b |
a96c16a1 | 89 | bbc $HL_pERR,r0,done |
2639612e | 90 | hlerr: |
2e6422fd SL |
91 | halt /* ungraceful */ |
92 | done: | |
93 | movl $PROGSIZE,r3 | |
94 | clrcor: | |
95 | clrq (r3) | |
96 | acbl $RELOC,$8,r3,clrcor | |
97 | /* run loaded program */ | |
2e6422fd SL |
98 | calls $0,*$0 |
99 | brw start2 | |
2639612e | 100 | physUBA: |
a96c16a1 MK |
101 | .long 0xf30000 /* uba0 */ |
102 | .long 0xf32000 /* uba1 */ | |
2639612e | 103 | end: |