1/*
2 * Copyright 2013, winocm. <winocm@icloud.com>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
7 *
8 *   Redistributions of source code must retain the above copyright notice, this
9 *   list of conditions and the following disclaimer.
10 *
11 *   Redistributions in binary form must reproduce the above copyright notice, this
12 *   list of conditions and the following disclaimer in the documentation and/or
13 *   other materials provided with the distribution.
14 *
15 *   If you are going to use this software in any form that does not involve
16 *   releasing the source to this project or improving it, let me know beforehand.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
22 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
25 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29/*
30 * Machine identification routine.
31 */
32
33#include <mach/mach_types.h>
34#include <pexpert/pexpert.h>
35#include <pexpert/machine/protos.h>
36#include <pexpert/machine/boot.h>
37#include <kern/debug.h>
38#include <mach/vm_param.h>
39
40clock_frequency_info_t gPEClockFrequencyInfo;
41
42/*
43 * Technically, the pe_arm_stuff should be implemented, but I'm choosing to ignore
44 * those for right now. When done, put the crap in pe_identify_machine.
45 *
46 * Todo:
47 *  - pe_arm_get_soc_base_phys
48 *  - pe_arm_get_soc_revision
49 */
50
51/**
52 * pe_identify_machine
53 *
54 * Fill out machine dependent timer information. Will actually also be refilled
55 * during actual SoC dependent init.
56 */
57void pe_identify_machine(__unused boot_args * args)
58{
59    PE_early_puts("pe_identify_machine: Dummying out gPEClockFrequencyInfo (for now)\n");
60
61    /*
62     * Clear the gPEClockFrequencyInfo struct
63     */
64    bzero((void *) &gPEClockFrequencyInfo, sizeof(clock_frequency_info_t));
65
66    /*
67     * Start with default values that were blatantly stolen from i386.
68     */
69    gPEClockFrequencyInfo.timebase_frequency_hz = 1000000000;
70    gPEClockFrequencyInfo.bus_frequency_hz = 100000000;
71    gPEClockFrequencyInfo.cpu_frequency_hz = 300000000;
72
73    gPEClockFrequencyInfo.bus_frequency_min_hz = gPEClockFrequencyInfo.bus_frequency_hz;
74    gPEClockFrequencyInfo.bus_frequency_max_hz = gPEClockFrequencyInfo.bus_frequency_hz;
75    gPEClockFrequencyInfo.cpu_frequency_min_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
76    gPEClockFrequencyInfo.cpu_frequency_max_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
77
78    gPEClockFrequencyInfo.dec_clock_rate_hz = gPEClockFrequencyInfo.timebase_frequency_hz;
79    gPEClockFrequencyInfo.bus_clock_rate_hz = gPEClockFrequencyInfo.bus_frequency_hz;
80    gPEClockFrequencyInfo.cpu_clock_rate_hz = gPEClockFrequencyInfo.cpu_frequency_hz;
81
82    // Fill out the info from DeviceTree.
83}
84