1 files changed, 46 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/include/mach/cpu.h b/arch/arm/mach-ixp4xx/include/mach/cpu.h
new file mode 100644
index 000000000000..ff8aa2393bf9
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/include/mach/cpu.h
@@ -0,0 +1,46 @@
+/*
+ * arch/arm/mach-ixp4xx/include/mach/cpu.h
+ *
+ * IXP4XX cpu type detection
+ *
+ * Copyright (C) 2007 MontaVista Software, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef __ASM_ARCH_CPU_H__
+#define __ASM_ARCH_CPU_H__
+
+extern unsigned int processor_id;
+/* Processor id value in CP15 Register 0 */
+#define IXP425_PROCESSOR_ID_VALUE       0x690541c0
+#define IXP435_PROCESSOR_ID_VALUE       0x69054040
+#define IXP465_PROCESSOR_ID_VALUE       0x69054200
+#define IXP4XX_PROCESSOR_ID_MASK        0xfffffff0
+
+#define cpu_is_ixp42x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
+                          IXP425_PROCESSOR_ID_VALUE)
+#define cpu_is_ixp43x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
+                          IXP435_PROCESSOR_ID_VALUE)
+#define cpu_is_ixp46x() ((processor_id & IXP4XX_PROCESSOR_ID_MASK) == \
+                          IXP465_PROCESSOR_ID_VALUE)
+
+static inline u32 ixp4xx_read_feature_bits(void)
+{
+        unsigned int val = ~*IXP4XX_EXP_CFG2;
+        val &= ~IXP4XX_FEATURE_RESERVED;
+        if (!cpu_is_ixp46x())
+                val &= ~IXP4XX_FEATURE_IXP46X_ONLY;
+
+        return val;
+}
+
+static inline void ixp4xx_write_feature_bits(u32 value)
+{
+        *IXP4XX_EXP_CFG2 = ~value;
+}
+
+#endif  /* _ASM_ARCH_CPU_H */