tegra: T194 cpu macro

Add a macro to detect if a CPU core is Carmel or not.

Bug 1814444
Bug 1827294

Change-Id: I5797f80ff990ffbbb59342a11f68ed22ea2b184c
Signed-off-by: Rohit Khanna <rokhanna@nvidia.com>
Reviewed-on: http://git-master/r/1295512
Reviewed-by: Krishna Sitaraman <ksitaraman@nvidia.com>
Tested-by: Krishna Sitaraman <ksitaraman@nvidia.com>
Reviewed-by: svccoveritychecker <svccoveritychecker@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Alexander Van Brunt <avanbrunt@nvidia.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/include/linux/platform/tegra/tegra-cpu.h b/include/linux/platform/tegra/tegra-cpu.h
new file mode 100644
index 000000000..a85c4ab9a
--- /dev/null
+++ b/include/linux/platform/tegra/tegra-cpu.h
@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ */
+
+#include <asm/cputype.h>
+#include <asm/cpu.h>
+
+#define MIDR_CPU_MASK           0xFF0FFFF0
+#define MIDR_CPU_CARMEL         0x4E0F0040
+
+static inline u8 tegra_is_cpu_carmel(u8 cpu)
+{
+        struct cpuinfo_arm64 *cpuinfo = &per_cpu(cpu_data, cpu);
+        return ((cpuinfo->reg_midr & MIDR_CPU_MASK) == MIDR_CPU_CARMEL);
+}