| | 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 <pexpert/pexpert.h> |
| | 29 | #include <pexpert/protos.h> |
| | 30 | #include <pexpert/device_tree.h> |
| | 31 | |
| | 32 | /* Local declarations */ |
| | 33 | void pe_identify_machine(boot_args *args); |
| | 34 | |
| | 35 | /* pe_identify_machine: |
| | 36 | * |
| | 37 | * Sets up platform parameters. |
| | 38 | * Returns: nothing |
| | 39 | */ |
| | 40 | void 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 | } |
projects / apple / xnu.git / blame_incremental