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-rw-r--r--arch/arm/mach-ixp4xx/include/mach/cpu.h46
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 0000000..ff8aa23
--- /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 */
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