1/* 2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28#include <machine/machine_routines.h> 29#include <pexpert/pexpert.h> 30#include <pexpert/protos.h> 31 32/* Local declarations */ 33void pe_identify_machine(boot_args *args); 34 35/* pe_identify_machine: 36 * 37 * Sets up platform parameters. 38 * Returns: nothing 39 */ 40void pe_identify_machine(__unused boot_args *args) 41{ 42 // Clear the gPEClockFrequencyInfo struct 43 bzero((void *)&gPEClockFrequencyInfo, sizeof(clock_frequency_info_t)); 44 45 // Start with default values. 46 gPEClockFrequencyInfo.timebase_frequency_hz = 1000000000; 47 gPEClockFrequencyInfo.bus_frequency_hz = 100000000; 48 gPEClockFrequencyInfo.cpu_frequency_hz = 300000000; 49 50 gPEClockFrequencyInfo.bus_frequency_min_hz = gPEClockFrequencyInfo.bus_frequency_hz; 51 gPEClockFrequencyInfo.bus_frequency_max_hz = gPEClockFrequencyInfo.bus_frequency_hz; 52 gPEClockFrequencyInfo.cpu_frequency_min_hz = gPEClockFrequencyInfo.cpu_frequency_hz; 53 gPEClockFrequencyInfo.cpu_frequency_max_hz = gPEClockFrequencyInfo.cpu_frequency_hz; 54 55 gPEClockFrequencyInfo.dec_clock_rate_hz = gPEClockFrequencyInfo.timebase_frequency_hz; 56 gPEClockFrequencyInfo.bus_clock_rate_hz = gPEClockFrequencyInfo.bus_frequency_hz; 57 gPEClockFrequencyInfo.cpu_clock_rate_hz = gPEClockFrequencyInfo.cpu_frequency_hz; 58 59 // Get real number from some where. 60 61 // Set the num / den pairs form the hz values. 62 gPEClockFrequencyInfo.bus_clock_rate_num = gPEClockFrequencyInfo.bus_clock_rate_hz; 63 gPEClockFrequencyInfo.bus_clock_rate_den = 1; 64 65 gPEClockFrequencyInfo.bus_to_cpu_rate_num = 66 (2 * gPEClockFrequencyInfo.cpu_clock_rate_hz) / gPEClockFrequencyInfo.bus_clock_rate_hz; 67 gPEClockFrequencyInfo.bus_to_cpu_rate_den = 2; 68 69 gPEClockFrequencyInfo.bus_to_dec_rate_num = 1; 70 gPEClockFrequencyInfo.bus_to_dec_rate_den = 71 gPEClockFrequencyInfo.bus_clock_rate_hz / gPEClockFrequencyInfo.dec_clock_rate_hz; 72} 73