/* * Copyright (c) 2012-2013 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The 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, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ #include <atm/atm_internal.h> #include <machine/commpage.h> #include <pexpert/pexpert.h> /* * Global that is set by diagnosticd and readable by userspace * via the commpage. */ static uint32_t atm_diagnostic_config; static bool disable_atm; /* * Routine: atm_init * Purpose: Initialize the atm subsystem. * Returns: None. */ void atm_init(void) { char temp_buf[20]; /* Disable atm if disable_atm present in device-tree properties or in boot-args */ if ((PE_get_default("kern.disable_atm", temp_buf, sizeof(temp_buf))) || (PE_parse_boot_argn("-disable_atm", temp_buf, sizeof(temp_buf)))) { disable_atm = true; } if (!PE_parse_boot_argn("atm_diagnostic_config", &atm_diagnostic_config, sizeof(atm_diagnostic_config))) { if (!PE_get_default("kern.atm_diagnostic_config", &atm_diagnostic_config, sizeof(atm_diagnostic_config))) { atm_diagnostic_config = 0; } } kprintf("ATM subsystem is initialized\n"); } /* * Routine: atm_reset * Purpose: re-initialize the atm subsystem (e.g. for userspace reboot) * Returns: None. */ void atm_reset(void) { atm_init(); commpage_update_atm_diagnostic_config(atm_diagnostic_config); } /* * Routine: atm_set_diagnostic_config * Purpose: Set global atm_diagnostic_config and update the commpage to reflect * the new value. * Returns: Error if ATM is disabled. */ kern_return_t atm_set_diagnostic_config(uint32_t diagnostic_config) { if (disable_atm) { return KERN_NOT_SUPPORTED; } atm_diagnostic_config = diagnostic_config; commpage_update_atm_diagnostic_config(atm_diagnostic_config); return KERN_SUCCESS; } /* * Routine: atm_get_diagnostic_config * Purpose: Get global atm_diagnostic_config. * Returns: Diagnostic value */ uint32_t atm_get_diagnostic_config(void) { return atm_diagnostic_config; }