RAS: Add support for node registration
Previous patches added frameworks for handling RAS errors. This patch
introduces features that the platform can use to enumerate and iterate
RAS nodes:
- The REGISTER_RAS_NODES() can be used to expose an array of
ras_node_info_t structures. Each ras_node_info_t describes a RAS
node, along with handlers for probing the node for error, and if
did record an error, another handler to handle it.
- The macro for_each_ras_node() can be used to iterate over the
registered RAS nodes, probe for, and handle any errors.
The common platform EA handler has been amended using error handling
primitives introduced by both this and previous patches.
Change-Id: I2e13f65a88357bc48cd97d608db6c541fad73853
Signed-off-by: Jeenu Viswambharan <jeenu.viswambharan@arm.com>
diff --git a/lib/extensions/ras/ras_common.c b/lib/extensions/ras/ras_common.c
new file mode 100644
index 0000000..2e316ed
--- /dev/null
+++ b/lib/extensions/ras/ras_common.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch_helpers.h>
+#include <debug.h>
+#include <ea_handle.h>
+#include <ehf.h>
+#include <platform.h>
+#include <ras.h>
+#include <ras_arch.h>
+
+/* Handler that receives External Aborts on RAS-capable systems */
+int ras_ea_handler(unsigned int ea_reason, uint64_t syndrome, void *cookie,
+ void *handle, uint64_t flags)
+{
+ unsigned int i, n_handled = 0, ret;
+ int probe_data;
+ struct err_record_info *info;
+
+ const struct err_handler_data err_data = {
+ .version = ERR_HANDLER_VERSION,
+ .ea_reason = ea_reason,
+ .syndrome = syndrome,
+ .flags = flags,
+ .cookie = cookie,
+ .handle = handle
+ };
+
+ for_each_err_record_info(i, info) {
+ assert(info->probe != NULL);
+ assert(info->handler != NULL);
+
+ /* Continue probing until the record group signals no error */
+ while (1) {
+ if (info->probe(info, &probe_data) == 0)
+ break;
+
+ /* Handle error */
+ ret = info->handler(info, probe_data, &err_data);
+ if (ret != 0)
+ return ret;
+
+ n_handled++;
+ }
+ }
+
+ return (n_handled != 0);
+}