2 * common EDAC components that must be in kernel
4 * Author: Dave Jiang <djiang@mvista.com>
6 * 2007 (c) MontaVista Software, Inc.
7 * 2010 (c) Advanced Micro Devices Inc.
8 * Borislav Petkov <bp@alien8.de>
10 * This file is licensed under the terms of the GNU General Public
11 * License version 2. This program is licensed "as is" without any
12 * warranty of any kind, whether express or implied.
15 #include <linux/module.h>
16 #include <linux/edac.h>
17 #include <linux/atomic.h>
18 #include <linux/device.h>
20 int edac_op_state = EDAC_OPSTATE_INVAL;
21 EXPORT_SYMBOL_GPL(edac_op_state);
23 atomic_t edac_handlers = ATOMIC_INIT(0);
24 EXPORT_SYMBOL_GPL(edac_handlers);
26 int edac_err_assert = 0;
27 EXPORT_SYMBOL_GPL(edac_err_assert);
29 static atomic_t edac_subsys_valid = ATOMIC_INIT(0);
31 int edac_report_status = EDAC_REPORTING_ENABLED;
32 EXPORT_SYMBOL_GPL(edac_report_status);
34 static int __init edac_report_setup(char *str)
39 if (!strncmp(str, "on", 2))
40 set_edac_report_status(EDAC_REPORTING_ENABLED);
41 else if (!strncmp(str, "off", 3))
42 set_edac_report_status(EDAC_REPORTING_DISABLED);
43 else if (!strncmp(str, "force", 5))
44 set_edac_report_status(EDAC_REPORTING_FORCE);
48 __setup("edac_report=", edac_report_setup);
51 * called to determine if there is an EDAC driver interested in
52 * knowing an event (such as NMI) occurred
54 int edac_handler_set(void)
56 if (edac_op_state == EDAC_OPSTATE_POLL)
59 return atomic_read(&edac_handlers);
61 EXPORT_SYMBOL_GPL(edac_handler_set);
64 * handler for NMI type of interrupts to assert error
66 void edac_atomic_assert_error(void)
70 EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
73 * sysfs object: /sys/devices/system/edac
74 * need to export to other files
76 struct bus_type edac_subsys = {
80 EXPORT_SYMBOL_GPL(edac_subsys);
82 /* return pointer to the 'edac' node in sysfs */
83 struct bus_type *edac_get_sysfs_subsys(void)
87 if (atomic_read(&edac_subsys_valid))
90 /* create the /sys/devices/system/edac directory */
91 err = subsys_system_register(&edac_subsys, NULL);
93 printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
98 atomic_inc(&edac_subsys_valid);
101 EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
103 void edac_put_sysfs_subsys(void)
105 /* last user unregisters it */
106 if (atomic_dec_and_test(&edac_subsys_valid))
107 bus_unregister(&edac_subsys);
109 EXPORT_SYMBOL_GPL(edac_put_sysfs_subsys);