| /*************************************************************************** |
| * __________ __ ___. |
| * Open \______ \ ____ ____ | | _\_ |__ _______ ___ |
| * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / |
| * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < |
| * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ |
| * \/ \/ \/ \/ \/ |
| * $Id$ |
| * |
| * Copyright (C) 2006 Tomasz Malesinski |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version 2 |
| * of the License, or (at your option) any later version. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ****************************************************************************/ |
| |
| #include "config.h" |
| #include "codecs.h" |
| |
| struct codec_api *ci DATA_ATTR; |
| |
| extern unsigned char plugin_bss_start[]; |
| extern unsigned char plugin_end_addr[]; |
| |
| extern enum codec_status codec_main(enum codec_entry_call_reason reason); |
| |
| /* stub, the entry point is called via its reference in __header to |
| * avoid warning with certain compilers */ |
| int _start(void) {return 0;} |
| |
| enum codec_status codec_start(enum codec_entry_call_reason reason) |
| { |
| #if (CONFIG_PLATFORM & PLATFORM_NATIVE) |
| if (reason == CODEC_LOAD) |
| { |
| #ifdef USE_IRAM |
| extern char iramcopy[], iramstart[], iramend[], iedata[], iend[]; |
| size_t iram_size = iramend - iramstart; |
| size_t ibss_size = iend - iedata; |
| if (iram_size > 0 || ibss_size > 0) |
| { |
| ci->memcpy(iramstart, iramcopy, iram_size); |
| ci->memset(iedata, 0, ibss_size); |
| /* make the icache (if it exists) up to date with the new code */ |
| ci->cpucache_invalidate(); |
| /* barrier to prevent reordering iram copy and BSS clearing, |
| * because the BSS segment alias the IRAM copy. |
| */ |
| asm volatile ("" ::: "memory"); |
| } |
| #endif /* PLUGIN_USE_IRAM */ |
| ci->memset(plugin_bss_start, 0, plugin_end_addr - plugin_bss_start); |
| /* Some parts of bss may be used via a no-cache alias (at least |
| * portalplayer has this). If we don't clear the cache, those aliases |
| * may read garbage */ |
| ci->cpucache_invalidate(); |
| } |
| #endif /* CONFIG_PLATFORM */ |
| |
| /* Note: If for any reason codec_main would not be called with CODEC_LOAD |
| * because the above code failed then it must not be ever be called with |
| * any other value and some strategy to avoid doing so must be conceived */ |
| return codec_main(reason); |
| } |
| |
| #if defined(CPU_ARM) && (CONFIG_PLATFORM & PLATFORM_NATIVE) |
| void __attribute__((naked)) __div0(void) |
| { |
| asm volatile("bx %0" : : "r"(ci->__div0)); |
| } |
| #endif |