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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /drivers/edac/edac_stub.c
Initial import
Diffstat (limited to 'drivers/edac/edac_stub.c')
-rw-r--r--drivers/edac/edac_stub.c110
1 files changed, 110 insertions, 0 deletions
diff --git a/drivers/edac/edac_stub.c b/drivers/edac/edac_stub.c
new file mode 100644
index 000000000..9d9e18aef
--- /dev/null
+++ b/drivers/edac/edac_stub.c
@@ -0,0 +1,110 @@
+/*
+ * common EDAC components that must be in kernel
+ *
+ * Author: Dave Jiang <djiang@mvista.com>
+ *
+ * 2007 (c) MontaVista Software, Inc.
+ * 2010 (c) Advanced Micro Devices Inc.
+ * Borislav Petkov <bp@alien8.de>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ */
+#include <linux/module.h>
+#include <linux/edac.h>
+#include <linux/atomic.h>
+#include <linux/device.h>
+#include <asm/edac.h>
+
+int edac_op_state = EDAC_OPSTATE_INVAL;
+EXPORT_SYMBOL_GPL(edac_op_state);
+
+atomic_t edac_handlers = ATOMIC_INIT(0);
+EXPORT_SYMBOL_GPL(edac_handlers);
+
+int edac_err_assert = 0;
+EXPORT_SYMBOL_GPL(edac_err_assert);
+
+static atomic_t edac_subsys_valid = ATOMIC_INIT(0);
+
+int edac_report_status = EDAC_REPORTING_ENABLED;
+EXPORT_SYMBOL_GPL(edac_report_status);
+
+static int __init edac_report_setup(char *str)
+{
+ if (!str)
+ return -EINVAL;
+
+ if (!strncmp(str, "on", 2))
+ set_edac_report_status(EDAC_REPORTING_ENABLED);
+ else if (!strncmp(str, "off", 3))
+ set_edac_report_status(EDAC_REPORTING_DISABLED);
+ else if (!strncmp(str, "force", 5))
+ set_edac_report_status(EDAC_REPORTING_FORCE);
+
+ return 0;
+}
+__setup("edac_report=", edac_report_setup);
+
+/*
+ * called to determine if there is an EDAC driver interested in
+ * knowing an event (such as NMI) occurred
+ */
+int edac_handler_set(void)
+{
+ if (edac_op_state == EDAC_OPSTATE_POLL)
+ return 0;
+
+ return atomic_read(&edac_handlers);
+}
+EXPORT_SYMBOL_GPL(edac_handler_set);
+
+/*
+ * handler for NMI type of interrupts to assert error
+ */
+void edac_atomic_assert_error(void)
+{
+ edac_err_assert++;
+}
+EXPORT_SYMBOL_GPL(edac_atomic_assert_error);
+
+/*
+ * sysfs object: /sys/devices/system/edac
+ * need to export to other files
+ */
+struct bus_type edac_subsys = {
+ .name = "edac",
+ .dev_name = "edac",
+};
+EXPORT_SYMBOL_GPL(edac_subsys);
+
+/* return pointer to the 'edac' node in sysfs */
+struct bus_type *edac_get_sysfs_subsys(void)
+{
+ int err = 0;
+
+ if (atomic_read(&edac_subsys_valid))
+ goto out;
+
+ /* create the /sys/devices/system/edac directory */
+ err = subsys_system_register(&edac_subsys, NULL);
+ if (err) {
+ printk(KERN_ERR "Error registering toplevel EDAC sysfs dir\n");
+ return NULL;
+ }
+
+out:
+ atomic_inc(&edac_subsys_valid);
+ return &edac_subsys;
+}
+EXPORT_SYMBOL_GPL(edac_get_sysfs_subsys);
+
+void edac_put_sysfs_subsys(void)
+{
+ /* last user unregisters it */
+ if (atomic_dec_and_test(&edac_subsys_valid))
+ bus_unregister(&edac_subsys);
+}
+EXPORT_SYMBOL_GPL(edac_put_sysfs_subsys);