ARC: Implement print_cpuinfo()
Once we enable DISPLAY_CPUINFO for ARC we'll see
ARC core family and version printed on boot.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
diff --git a/arch/arc/lib/cpu.c b/arch/arc/lib/cpu.c
index cb95e06..50cd7cd 100644
--- a/arch/arc/lib/cpu.c
+++ b/arch/arc/lib/cpu.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0+
/*
- * Copyright (C) 2013-2014 Synopsys, Inc. All rights reserved.
+ * Copyright (C) 2013-2014, 2018 Synopsys, Inc. All rights reserved.
*/
#include <common.h>
@@ -33,3 +33,36 @@
{
return 0;
}
+
+#ifdef CONFIG_DISPLAY_CPUINFO
+const char *decode_identity(void)
+{
+ int arcver = read_aux_reg(ARC_AUX_IDENTITY) & 0xff;
+
+ switch (arcver) {
+ /* ARCompact cores */
+ case 0x32: return "ARC 700 v4.4-4.5";
+ case 0x33: return "ARC 700 v4.6-v4.9";
+ case 0x34: return "ARC 700 v4.10";
+ case 0x35: return "ARC 700 v4.11";
+
+ /* ARCv2 cores */
+ case 0x41: return "ARC EM v1.1a";
+ case 0x42: return "ARC EM v3.0";
+ case 0x43: return "ARC EM v4.0";
+ case 0x50: return "ARC HS v1.0";
+ case 0x51: return "ARC EM v2.0";
+ case 0x52: return "ARC EM v2.1";
+ case 0x53: return "ARC HS v3.0";
+ case 0x54: return "ARC HS v4.0";
+
+ default: return "Unknown ARC core";
+ }
+}
+
+int print_cpuinfo(void)
+{
+ printf("CPU: %s\n", decode_identity());
+ return 0;
+}
+#endif /* CONFIG_DISPLAY_CPUINFO */