1*0f4c859eSApple OSS Distributions /*
2*0f4c859eSApple OSS Distributions * Copyright (c) 2012-2013 Apple Inc. All rights reserved.
3*0f4c859eSApple OSS Distributions *
4*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5*0f4c859eSApple OSS Distributions *
6*0f4c859eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code
7*0f4c859eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License
8*0f4c859eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in
9*0f4c859eSApple OSS Distributions * compliance with the License. The rights granted to you under the License
10*0f4c859eSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of,
11*0f4c859eSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to
12*0f4c859eSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any
13*0f4c859eSApple OSS Distributions * terms of an Apple operating system software license agreement.
14*0f4c859eSApple OSS Distributions *
15*0f4c859eSApple OSS Distributions * Please obtain a copy of the License at
16*0f4c859eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file.
17*0f4c859eSApple OSS Distributions *
18*0f4c859eSApple OSS Distributions * The Original Code and all software distributed under the License are
19*0f4c859eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20*0f4c859eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21*0f4c859eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22*0f4c859eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23*0f4c859eSApple OSS Distributions * Please see the License for the specific language governing rights and
24*0f4c859eSApple OSS Distributions * limitations under the License.
25*0f4c859eSApple OSS Distributions *
26*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27*0f4c859eSApple OSS Distributions */
28*0f4c859eSApple OSS Distributions
29*0f4c859eSApple OSS Distributions #include <atm/atm_internal.h>
30*0f4c859eSApple OSS Distributions #include <machine/commpage.h>
31*0f4c859eSApple OSS Distributions #include <pexpert/pexpert.h>
32*0f4c859eSApple OSS Distributions
33*0f4c859eSApple OSS Distributions /*
34*0f4c859eSApple OSS Distributions * Global that is set by diagnosticd and readable by userspace
35*0f4c859eSApple OSS Distributions * via the commpage.
36*0f4c859eSApple OSS Distributions */
37*0f4c859eSApple OSS Distributions static uint32_t atm_diagnostic_config;
38*0f4c859eSApple OSS Distributions static bool disable_atm;
39*0f4c859eSApple OSS Distributions
40*0f4c859eSApple OSS Distributions /*
41*0f4c859eSApple OSS Distributions * Routine: atm_init
42*0f4c859eSApple OSS Distributions * Purpose: Initialize the atm subsystem.
43*0f4c859eSApple OSS Distributions * Returns: None.
44*0f4c859eSApple OSS Distributions */
45*0f4c859eSApple OSS Distributions void
atm_init(void)46*0f4c859eSApple OSS Distributions atm_init(void)
47*0f4c859eSApple OSS Distributions {
48*0f4c859eSApple OSS Distributions char temp_buf[20];
49*0f4c859eSApple OSS Distributions
50*0f4c859eSApple OSS Distributions /* Disable atm if disable_atm present in device-tree properties or in boot-args */
51*0f4c859eSApple OSS Distributions if ((PE_get_default("kern.disable_atm", temp_buf, sizeof(temp_buf))) ||
52*0f4c859eSApple OSS Distributions (PE_parse_boot_argn("-disable_atm", temp_buf, sizeof(temp_buf)))) {
53*0f4c859eSApple OSS Distributions disable_atm = true;
54*0f4c859eSApple OSS Distributions }
55*0f4c859eSApple OSS Distributions
56*0f4c859eSApple OSS Distributions if (!PE_parse_boot_argn("atm_diagnostic_config", &atm_diagnostic_config, sizeof(atm_diagnostic_config))) {
57*0f4c859eSApple OSS Distributions if (!PE_get_default("kern.atm_diagnostic_config", &atm_diagnostic_config, sizeof(atm_diagnostic_config))) {
58*0f4c859eSApple OSS Distributions atm_diagnostic_config = 0;
59*0f4c859eSApple OSS Distributions }
60*0f4c859eSApple OSS Distributions }
61*0f4c859eSApple OSS Distributions
62*0f4c859eSApple OSS Distributions kprintf("ATM subsystem is initialized\n");
63*0f4c859eSApple OSS Distributions }
64*0f4c859eSApple OSS Distributions
65*0f4c859eSApple OSS Distributions /*
66*0f4c859eSApple OSS Distributions * Routine: atm_reset
67*0f4c859eSApple OSS Distributions * Purpose: re-initialize the atm subsystem (e.g. for userspace reboot)
68*0f4c859eSApple OSS Distributions * Returns: None.
69*0f4c859eSApple OSS Distributions */
70*0f4c859eSApple OSS Distributions void
atm_reset(void)71*0f4c859eSApple OSS Distributions atm_reset(void)
72*0f4c859eSApple OSS Distributions {
73*0f4c859eSApple OSS Distributions atm_init();
74*0f4c859eSApple OSS Distributions commpage_update_atm_diagnostic_config(atm_diagnostic_config);
75*0f4c859eSApple OSS Distributions }
76*0f4c859eSApple OSS Distributions
77*0f4c859eSApple OSS Distributions /*
78*0f4c859eSApple OSS Distributions * Routine: atm_set_diagnostic_config
79*0f4c859eSApple OSS Distributions * Purpose: Set global atm_diagnostic_config and update the commpage to reflect
80*0f4c859eSApple OSS Distributions * the new value.
81*0f4c859eSApple OSS Distributions * Returns: Error if ATM is disabled.
82*0f4c859eSApple OSS Distributions */
83*0f4c859eSApple OSS Distributions kern_return_t
atm_set_diagnostic_config(uint32_t diagnostic_config)84*0f4c859eSApple OSS Distributions atm_set_diagnostic_config(uint32_t diagnostic_config)
85*0f4c859eSApple OSS Distributions {
86*0f4c859eSApple OSS Distributions if (disable_atm) {
87*0f4c859eSApple OSS Distributions return KERN_NOT_SUPPORTED;
88*0f4c859eSApple OSS Distributions }
89*0f4c859eSApple OSS Distributions
90*0f4c859eSApple OSS Distributions atm_diagnostic_config = diagnostic_config;
91*0f4c859eSApple OSS Distributions commpage_update_atm_diagnostic_config(atm_diagnostic_config);
92*0f4c859eSApple OSS Distributions
93*0f4c859eSApple OSS Distributions return KERN_SUCCESS;
94*0f4c859eSApple OSS Distributions }
95*0f4c859eSApple OSS Distributions
96*0f4c859eSApple OSS Distributions /*
97*0f4c859eSApple OSS Distributions * Routine: atm_get_diagnostic_config
98*0f4c859eSApple OSS Distributions * Purpose: Get global atm_diagnostic_config.
99*0f4c859eSApple OSS Distributions * Returns: Diagnostic value
100*0f4c859eSApple OSS Distributions */
101*0f4c859eSApple OSS Distributions uint32_t
atm_get_diagnostic_config(void)102*0f4c859eSApple OSS Distributions atm_get_diagnostic_config(void)
103*0f4c859eSApple OSS Distributions {
104*0f4c859eSApple OSS Distributions return atm_diagnostic_config;
105*0f4c859eSApple OSS Distributions }
106