drivers/edac/edac_stub.c

   1 /*
   2  * common EDAC components that must be in kernel
   3  *
   4  * Author: Dave Jiang <djiang@mvista.com>
   5  *
   6  * 2007 (c) MontaVista Software, Inc.
   7  * 2010 (c) Advanced Micro Devices Inc.
   8  *          Borislav Petkov <bp@alien8.de>
   9  *
  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.
  13  *
  14  */
  15 #include <linux/module.h>
  16 #include <linux/edac.h>
  17 #include <linux/atomic.h>
  18 #include <linux/device.h>
  19
  20 int edac_op_state = EDAC_OPSTATE_INVAL;
  21 EXPORT_SYMBOL_GPL(edac_op_state);
  22
  23 atomic_t edac_handlers = ATOMIC_INIT(0);
  24 EXPORT_SYMBOL_GPL(edac_handlers);
  25
  26 int edac_err_assert = 0;
  27 EXPORT_SYMBOL_GPL(edac_err_assert);
  28
  29 int edac_report_status = EDAC_REPORTING_ENABLED;
  30 EXPORT_SYMBOL_GPL(edac_report_status);
  31
  32 static int __init edac_report_setup(char *str)
  33 {
  34         if (!str)
  35                 return -EINVAL;
  36
  37         if (!strncmp(str, "on", 2))
  38                 set_edac_report_status(EDAC_REPORTING_ENABLED);
  39         else if (!strncmp(str, "off", 3))
  40                 set_edac_report_status(EDAC_REPORTING_DISABLED);
  41         else if (!strncmp(str, "force", 5))
  42                 set_edac_report_status(EDAC_REPORTING_FORCE);
  43
  44         return 0;
  45 }
  46 __setup("edac_report=", edac_report_setup);
  47
  48 /*
  49  * called to determine if there is an EDAC driver interested in
  50  * knowing an event (such as NMI) occurred
  51  */
  52 int edac_handler_set(void)
  53 {
  54         if (edac_op_state == EDAC_OPSTATE_POLL)
  55                 return 0;
  56
  57         return atomic_read(&edac_handlers);
  58 }
  59 EXPORT_SYMBOL_GPL(edac_handler_set);
  60
  61 /*
  62  * handler for NMI type of interrupts to assert error
  63  */
  64 void edac_atomic_assert_error(void)
  65 {
  66         edac_err_assert++;
  67 }
  68 EXPORT_SYMBOL_GPL(edac_atomic_assert_error);