projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| f0239511 | 1 | /* srt0.c 1.6 87/04/02 */ |
| 1e1f58c3 SL |
2 | |
| 3 | #include "../machine/mtpr.h" | |
| 4 | #define LOCORE | |
| 5 | ||
| 6 | /* | |
| 7 | * Startup code for standalone system | |
| 8 | */ | |
| 9 | ||
| 10 | .globl _end | |
| 1e1f58c3 SL |
11 | .globl _main |
| 12 | .globl __rtt | |
| 13 | .globl _openfirst | |
| 14 | .globl _start | |
| f0239511 MK |
15 | .globl _boothowto |
| 16 | .globl _bootdev | |
| 1e1f58c3 SL |
17 | |
| 18 | .set HIGH,31 # mask for total disable | |
| 19 | ||
| 947ad8db SL |
20 | #ifndef REL |
| 21 | .globl _device_space | |
| 22 | _device_space: # Tapemaster config block, etc. | |
| 23 | .space 0x1000-RELOC | |
| 24 | ||
| 8de65f23 MK |
25 | .globl _entry |
| 26 | _entry: | |
| 1e1f58c3 SL |
27 | .word 0x00 # 'call' by relsrt0. |
| 28 | #endif | |
| 29 | _start: | |
| 30 | mtpr $HIGH,$IPL # just in case | |
| 8de65f23 | 31 | #ifdef REL |
| 947ad8db | 32 | movl $BOOTRELOC,sp |
| ae12cb14 | 33 | |
| 947ad8db SL |
34 | movl $RELOC,r0 /* source address to copy from */ |
| 35 | movl $BOOTRELOC,r1 /* destination address */ | |
| 600e8234 | 36 | movl tdlen,r2 /* length to copy */ |
| ae12cb14 BJ |
37 | addl2 r2,r0 |
| 38 | addl2 r2,r1 | |
| 1e1f58c3 | 39 | mvloop: |
| ae12cb14 BJ |
40 | decl r0 |
| 41 | decl r1 | |
| 1e1f58c3 | 42 | movb (r0),(r1) |
| 1e1f58c3 | 43 | decl r2 |
| ae12cb14 BJ |
44 | bgeq mvloop |
| 45 | ||
| 8de65f23 MK |
46 | /* |
| 47 | * zero bss | |
| 48 | */ | |
| 600e8234 MK |
49 | movl aedata,r1 /* destination address */ |
| 50 | subl3 $_edata,$_end,r2 /* length to zero */ | |
| 8de65f23 MK |
51 | zloop: |
| 52 | movb $0,(r1) | |
| 53 | incl r1 | |
| 54 | decl r2 | |
| 55 | bgeq zloop | |
| 56 | ||
| 600e8234 MK |
57 | mtpr $1,$PACC |
| 58 | mtpr $1,$PADC | |
| 1e1f58c3 | 59 | jmp *abegin |
| 8de65f23 | 60 | #endif |
| ae12cb14 | 61 | |
| 1e1f58c3 | 62 | begin: |
| 8de65f23 | 63 | movl fp,ofp |
| f0239511 MK |
64 | movl r11,_boothowto |
| 65 | movl r10,_bootdev | |
| 1e1f58c3 SL |
66 | movl $1,_openfirst |
| 67 | callf $4,_main | |
| 8de65f23 MK |
68 | #ifdef REL |
| 69 | halt | |
| 70 | #endif | |
| 71 | ret | |
| 1e1f58c3 SL |
72 | |
| 73 | __rtt: | |
| 74 | .word 0x0 | |
| 8de65f23 MK |
75 | #ifdef REL |
| 76 | halt | |
| 77 | #endif | |
| 78 | movl ofp,fp | |
| 79 | ret | |
| 1e1f58c3 SL |
80 | |
| 81 | .data | |
| 82 | abegin: .long begin | |
| 947ad8db | 83 | #ifdef REL |
| 600e8234 MK |
84 | aedata: .long _edata |
| 85 | tdlen: .long _edata-BOOTRELOC | |
| 947ad8db | 86 | #endif |
| 8de65f23 | 87 | ofp: .long 0 |
| f0239511 MK |
88 | _boothowto: .long 0 |
| 89 | _bootdev: .long 0 |