/* * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <pexpert/pexpert.h> #include <pexpert/protos.h> #include <pexpert/device_tree.h> /* Local declarations */ void pe_identify_machine(boot_args *args); /* pe_identify_machine: * * Sets up platform parameters. * Returns: nothing */ void pe_identify_machine(boot_args *args) { // Clear the gPEClockFrequencyInfo struct bzero((void *)&gPEClockFrequencyInfo, sizeof(clock_frequency_info_t)); // Start with default values. gPEClockFrequencyInfo.bus_clock_rate_hz = 100000000; gPEClockFrequencyInfo.cpu_clock_rate_hz = 300000000; gPEClockFrequencyInfo.dec_clock_rate_hz = 25000000; // Get real number from some where. // Set the num / den pairs form the hz values. gPEClockFrequencyInfo.bus_clock_rate_num = gPEClockFrequencyInfo.bus_clock_rate_hz; gPEClockFrequencyInfo.bus_clock_rate_den = 1; gPEClockFrequencyInfo.bus_to_cpu_rate_num = (2 * gPEClockFrequencyInfo.cpu_clock_rate_hz) / gPEClockFrequencyInfo.bus_clock_rate_hz; gPEClockFrequencyInfo.bus_to_cpu_rate_den = 2; gPEClockFrequencyInfo.bus_to_dec_rate_num = 1; gPEClockFrequencyInfo.bus_to_dec_rate_den = gPEClockFrequencyInfo.bus_clock_rate_hz / gPEClockFrequencyInfo.dec_clock_rate_hz; }