| 1 | ; -*- fundamental -*- |
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| 2 | ; ----------------------------------------------------------------------- |
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| 3 | ; |
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| 4 | ; Copyright 2004-2008 H. Peter Anvin - All Rights Reserved |
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| 5 | ; Copyright 2009 Intel Corporation; author: H. Peter Anvin |
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| 6 | ; |
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| 7 | ; This program is free software; you can redistribute it and/or modify |
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| 8 | ; it under the terms of the GNU General Public License as published by |
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| 9 | ; the Free Software Foundation, Inc., 53 Temple Place Ste 330, |
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| 10 | ; Boston MA 02111-1307, USA; either version 2 of the License, or |
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| 11 | ; (at your option) any later version; incorporated herein by reference. |
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| 12 | ; |
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| 13 | ; ----------------------------------------------------------------------- |
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| 14 | |
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| 15 | ; |
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| 16 | ; init.inc |
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| 17 | ; |
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| 18 | ; Common initialization code (inline) |
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| 19 | ; |
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| 20 | |
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| 21 | section .text16 |
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| 22 | common_init: |
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| 23 | ; Initialize PM invocation framework |
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| 24 | call pm_init |
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| 25 | |
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| 26 | %if IS_PXELINUX |
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| 27 | ; Save derivative-specific data |
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| 28 | pm_call pm_save_data |
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| 29 | %endif |
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| 30 | |
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| 31 | ; Decompress PM code to its target location |
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| 32 | pm_call pm_decompress |
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| 33 | cmp eax,__pm_code_len |
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| 34 | jne kaboom |
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| 35 | |
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| 36 | extern syslinux_register_bios, init |
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| 37 | |
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| 38 | pm_call syslinux_register_bios |
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| 39 | pm_call init |
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| 40 | |
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| 41 | ; |
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| 42 | ; The code to decompress the PM code and initialize other segments. |
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| 43 | ; |
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| 44 | extern _lzo1x_decompress_asm_fast_safe |
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| 45 | |
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| 46 | section .textnr |
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| 47 | bits 32 |
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| 48 | pm_decompress: |
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| 49 | push __pm_code_len + 16 ; Space for decompressed size |
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| 50 | push esp ; Pointer to previous word |
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| 51 | push __pm_code_start ; Target address |
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| 52 | push dword [lzo_data_size] ; Compressed size |
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| 53 | push dword __pm_code_lma |
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| 54 | call _lzo1x_decompress_asm_fast_safe |
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| 55 | add esp,16 |
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| 56 | pop RM_EAX ; Decompressed size |
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| 57 | |
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| 58 | ; Zero bss sections (but not .earlybss, since it may |
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| 59 | ; contain already-live data.) |
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| 60 | xor eax,eax |
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| 61 | mov edi,__bss_start |
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| 62 | mov ecx,__bss_dwords |
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| 63 | rep stosd |
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| 64 | mov edi,__bss16_start |
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| 65 | mov ecx,__bss16_dwords |
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| 66 | rep stosd |
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| 67 | mov edi,__high_clear_start ; .uibss, .lowmem |
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| 68 | mov ecx,__high_clear_dwords |
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| 69 | rep stosd |
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| 70 | |
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| 71 | ret |
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| 72 | |
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| 73 | section .data16 |
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| 74 | lzo_data_size dd 0 ; filled in by compressor |
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| 75 | |
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| 76 | section .text16 |
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| 77 | bits 16 |
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