projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 05e3da35 KB |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Computer Consoles Inc. | |
| 7 | * | |
| 8 | * %sccs.include.proprietary.c% | |
| 9 | * | |
| 10 | * @(#)srt0.c 7.2 (Berkeley) %G% | |
| 11 | */ | |
| 1e1f58c3 | 12 | |
| b28b3a13 | 13 | #include "../include/mtpr.h" |
| 1e1f58c3 SL |
14 | #define LOCORE |
| 15 | ||
| 16 | /* | |
| 17 | * Startup code for standalone system | |
| 18 | */ | |
| 19 | ||
| 20 | .globl _end | |
| 1e1f58c3 SL |
21 | .globl _main |
| 22 | .globl __rtt | |
| 7a87c7c5 | 23 | .globl _firstopen |
| 1e1f58c3 | 24 | .globl _start |
| f0239511 MK |
25 | .globl _boothowto |
| 26 | .globl _bootdev | |
| 1e1f58c3 SL |
27 | |
| 28 | .set HIGH,31 # mask for total disable | |
| 29 | ||
| 947ad8db SL |
30 | #ifndef REL |
| 31 | .globl _device_space | |
| 32 | _device_space: # Tapemaster config block, etc. | |
| 33 | .space 0x1000-RELOC | |
| 34 | ||
| 8de65f23 MK |
35 | .globl _entry |
| 36 | _entry: | |
| 1e1f58c3 SL |
37 | .word 0x00 # 'call' by relsrt0. |
| 38 | #endif | |
| 39 | _start: | |
| 40 | mtpr $HIGH,$IPL # just in case | |
| 8de65f23 | 41 | #ifdef REL |
| 947ad8db | 42 | movl $BOOTRELOC,sp |
| ae12cb14 | 43 | |
| 947ad8db SL |
44 | movl $RELOC,r0 /* source address to copy from */ |
| 45 | movl $BOOTRELOC,r1 /* destination address */ | |
| 600e8234 | 46 | movl tdlen,r2 /* length to copy */ |
| ae12cb14 BJ |
47 | addl2 r2,r0 |
| 48 | addl2 r2,r1 | |
| 1e1f58c3 | 49 | mvloop: |
| ae12cb14 BJ |
50 | decl r0 |
| 51 | decl r1 | |
| 1e1f58c3 | 52 | movb (r0),(r1) |
| 1e1f58c3 | 53 | decl r2 |
| ae12cb14 BJ |
54 | bgeq mvloop |
| 55 | ||
| 8de65f23 MK |
56 | /* |
| 57 | * zero bss | |
| 58 | */ | |
| 600e8234 MK |
59 | movl aedata,r1 /* destination address */ |
| 60 | subl3 $_edata,$_end,r2 /* length to zero */ | |
| 8de65f23 MK |
61 | zloop: |
| 62 | movb $0,(r1) | |
| 63 | incl r1 | |
| 64 | decl r2 | |
| 65 | bgeq zloop | |
| 66 | ||
| 600e8234 MK |
67 | mtpr $1,$PACC |
| 68 | mtpr $1,$PADC | |
| 1e1f58c3 | 69 | jmp *abegin |
| 8de65f23 | 70 | #endif |
| ae12cb14 | 71 | |
| 1e1f58c3 | 72 | begin: |
| 8de65f23 | 73 | movl fp,ofp |
| f0239511 MK |
74 | movl r11,_boothowto |
| 75 | movl r10,_bootdev | |
| 7a87c7c5 | 76 | movl $1,_firstopen |
| 1e1f58c3 | 77 | callf $4,_main |
| 8de65f23 MK |
78 | #ifdef REL |
| 79 | halt | |
| 80 | #endif | |
| 81 | ret | |
| 1e1f58c3 SL |
82 | |
| 83 | __rtt: | |
| 84 | .word 0x0 | |
| 8de65f23 MK |
85 | #ifdef REL |
| 86 | halt | |
| 87 | #endif | |
| 88 | movl ofp,fp | |
| 89 | ret | |
| 1e1f58c3 SL |
90 | |
| 91 | .data | |
| 92 | abegin: .long begin | |
| 947ad8db | 93 | #ifdef REL |
| 600e8234 MK |
94 | aedata: .long _edata |
| 95 | tdlen: .long _edata-BOOTRELOC | |
| 947ad8db | 96 | #endif |
| 8de65f23 | 97 | ofp: .long 0 |
| f0239511 MK |
98 | _boothowto: .long 0 |
| 99 | _bootdev: .long 0 |