1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/edac/octeon_edac-pc.c b/drivers/edac/octeon_edac-pc.c
new file mode 100644
index 000000000000..9d13061744e4
--- /dev/null
+++ b/drivers/edac/octeon_edac-pc.c
@@ -0,0 +1,140 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009 Wind River Systems,
+ *   written by Ralf Baechle <ralf@linux-mips.org>
+ */
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/edac.h>
+
+#include "edac_core.h"
+#include "edac_module.h"
+
+#include <asm/octeon/cvmx.h>
+#include <asm/mipsregs.h>
+
+#define EDAC_MOD_STR "octeon"
+
+extern int register_co_cache_error_notifier(struct notifier_block *nb);
+extern int unregister_co_cache_error_notifier(struct notifier_block *nb);
+
+extern unsigned long long cache_err_dcache[NR_CPUS];
+
+static struct edac_device_ctl_info *ed_cavium;
+
+/*
+ * EDAC CPU cache error callback
+ *
+ */
+
+static int  co_cache_error_event(struct notifier_block *this,
+        unsigned long event, void *ptr)
+{
+        unsigned int core = cvmx_get_core_num();
+        unsigned int cpu = smp_processor_id();
+        uint64_t icache_err = read_octeon_c0_icacheerr();
+        struct edac_device_ctl_info *ed = ed_cavium;
+
+        edac_device_printk(ed, KERN_ERR,
+                           "Cache error exception on core %d / processor %d:\n",
+                           core, cpu);
+        edac_device_printk(ed, KERN_ERR,
+                           "cp0_errorepc == %lx\n", read_c0_errorepc());
+        if (icache_err & 1) {
+                edac_device_printk(ed, KERN_ERR, "CacheErr (Icache) == %llx\n",
+                                   (unsigned long long)icache_err);
+                write_octeon_c0_icacheerr(0);
+                edac_device_handle_ce(ed, 0, 0, ed->ctl_name);
+        }
+        if (cache_err_dcache[core] & 1) {
+                edac_device_printk(ed, KERN_ERR, "CacheErr (Dcache) == %llx\n",
+                                   (unsigned long long)cache_err_dcache[core]);
+                cache_err_dcache[core] = 0;
+                edac_device_handle_ue(ed, 0, 0, ed->ctl_name);
+        }
+
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block co_cache_error_notifier = {
+        .notifier_call = co_cache_error_event,
+};
+
+static int __devinit co_cache_error_probe(struct platform_device *pdev)
+{
+        struct edac_device_ctl_info *ed;
+        int res = 0;
+
+        ed = edac_device_alloc_ctl_info(0, "cpu", 1, NULL, 0, 0, NULL, 0,
+                                        edac_device_alloc_index());
+
+        ed->dev = &pdev->dev;
+        platform_set_drvdata(pdev, ed);
+        ed->dev_name = dev_name(&pdev->dev);
+
+        ed->mod_name = "octeon-cpu";
+        ed->ctl_name = "co_cpu_err";
+
+        if (edac_device_add_device(ed) > 0) {
+                pr_err("%s: edac_device_add_device() failed\n", __func__);
+                goto err;
+        }
+
+        register_co_cache_error_notifier(&co_cache_error_notifier);
+        ed_cavium = ed;
+
+        return 0;
+
+err:
+        edac_device_free_ctl_info(ed);
+
+        return res;
+}
+
+static int co_cache_error_remove(struct platform_device *pdev)
+{
+        struct edac_device_ctl_info *ed = platform_get_drvdata(pdev);
+
+        unregister_co_cache_error_notifier(&co_cache_error_notifier);
+        ed_cavium = NULL;
+        edac_device_del_device(&pdev->dev);
+        edac_device_free_ctl_info(ed);
+
+        return 0;
+}
+
+static struct platform_driver co_cache_error_driver = {
+        .probe = co_cache_error_probe,
+        .remove = co_cache_error_remove,
+        .driver = {
+                   .name = "co_pc_edac",
+        }
+};
+
+static int __init co_edac_init(void)
+{
+        int ret;
+
+        ret = platform_driver_register(&co_cache_error_driver);
+        if (ret)
+                pr_warning(EDAC_MOD_STR "CPU err failed to register\n");
+
+        return ret;
+}
+
+static void __exit co_edac_exit(void)
+{
+        platform_driver_unregister(&co_cache_error_driver);
+}
+
+module_init(co_edac_init);
+module_exit(co_edac_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");