| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Paul Mackerras 1997. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or |
| 5 | * modify it under the terms of the GNU General Public License |
| 6 | * as published by the Free Software Foundation; either version |
| 7 | * 2 of the License, or (at your option) any later version. |
| 8 | * |
| 9 | * NOTE: this code runs in 32 bit mode and is packaged as ELF32. |
| 10 | */ |
| 11 | |
| Olaf Hering | decd300 | 2005-08-08 13:24:38 +1000 | [diff] [blame] | 12 | #include "ppc_asm.h" |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | |
| 14 | .text |
| Olaf Hering | 67a1b68 | 2005-10-28 17:46:49 -0700 | [diff] [blame] | 15 | .globl _zimage_start |
| 16 | _zimage_start: |
| Olaf Hering | a449723 | 2005-10-28 17:46:48 -0700 | [diff] [blame] | 17 | bl reloc_offset |
| 18 | |
| 19 | reloc_offset: |
| 20 | mflr r0 |
| 21 | lis r9,reloc_offset@ha |
| 22 | addi r9,r9,reloc_offset@l |
| 23 | subf. r0,r9,r0 |
| 24 | beq clear_caches |
| 25 | |
| 26 | reloc_got2: |
| 27 | lis r9,__got2_start@ha |
| 28 | addi r9,r9,__got2_start@l |
| 29 | lis r8,__got2_end@ha |
| 30 | addi r8,r8,__got2_end@l |
| 31 | subf. r8,r9,r8 |
| 32 | beq clear_caches |
| 33 | srwi. r8,r8,2 |
| 34 | mtctr r8 |
| 35 | add r9,r0,r9 |
| 36 | reloc_got2_loop: |
| 37 | lwz r8,0(r9) |
| 38 | add r8,r8,r0 |
| 39 | stw r8,0(r9) |
| 40 | addi r9,r9,4 |
| 41 | bdnz reloc_got2_loop |
| 42 | |
| 43 | clear_caches: |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | lis r9,_start@h |
| Olaf Hering | a449723 | 2005-10-28 17:46:48 -0700 | [diff] [blame] | 45 | add r9,r0,r9 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | lis r8,_etext@ha |
| 47 | addi r8,r8,_etext@l |
| Olaf Hering | a449723 | 2005-10-28 17:46:48 -0700 | [diff] [blame] | 48 | add r8,r0,r8 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | 1: dcbf r0,r9 |
| 50 | icbi r0,r9 |
| 51 | addi r9,r9,0x20 |
| 52 | cmplwi 0,r9,8 |
| 53 | blt 1b |
| 54 | sync |
| 55 | isync |
| 56 | |
| Olaf Hering | 7e65811 | 2005-10-28 17:46:50 -0700 | [diff] [blame^] | 57 | mr r6,r1 |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | b start |
| 59 | |