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 /* * This file is part of the coreboot project. * * Copyright (C) 2006 Indrek Kruusa * Copyright (C) 2006 Ronald G. Minnich * Copyright (C) 2007 Advanced Micro Devices, Inc. * * 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 program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ #include #include /** * StartTimer1 * * Entry: none * Exit: Starts Timer 1 for port 61 use * Destroys: Al, */ static void StartTimer1(void) { outb(0x56, 0x43); outb(0x12, 0x41); } void SystemPreInit(void) { /* they want a jump ... */ #if !IS_ENABLED(CONFIG_CACHE_AS_RAM) __asm__ __volatile__("jmp .+2\ninvd\njmp .+2\n"); #endif StartTimer1(); }