[ARM] 3947/1: AT91: cpu_is_XXX macro's

This patch replaces the arch_identify() in system.h with a set of
cpu_is_XXX() macro's.  This allows for compile-time checking of the
target AT91 processor.

Original patch from David Brownell.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 49 insertions, 0 deletions

diff --git a/include/asm-arm/arch-at91rm9200/cpu.h b/include/asm-arm/arch-at91rm9200/cpu.h
new file mode 100644
index 000000000000..6f8d09b08692
--- /dev/null
+++ b/include/asm-arm/arch-at91rm9200/cpu.h
@@ -0,0 +1,49 @@
+/*
+ * include/asm-arm/arch-at91rm9200/cpu.h
+ *
+ *  Copyright (C) 2006 SAN People
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ */
+
+#ifndef __ASM_ARCH_CPU_H
+#define __ASM_ARCH_CPU_H
+
+#include <asm/hardware.h>
+#include <asm/arch/at91_dbgu.h>
+
+
+#define ARCH_ID_AT91RM9200      0x09290780
+#define ARCH_ID_AT91SAM9260     0x019803a0
+#define ARCH_ID_AT91SAM9261     0x019703a0
+
+
+static inline unsigned long at91_cpu_identify(void)
+{
+        return (at91_sys_read(AT91_DBGU_CIDR) & ~AT91_CIDR_VERSION);
+}
+
+
+#ifdef CONFIG_ARCH_AT91RM9200
+#define cpu_is_at91rm9200()     (at91_cpu_identify() == ARCH_ID_AT91RM9200)
+#else
+#define cpu_is_at91rm9200()     (0)
+#endif
+
+#ifdef CONFIG_ARCH_AT91SAM9260
+#define cpu_is_at91sam9260()    (at91_cpu_identify() == ARCH_ID_AT91SAM9260)
+#else
+#define cpu_is_at91sam9260()    (0)
+#endif
+
+#ifdef CONFIG_ARCH_AT91SAM9261
+#define cpu_is_at91sam9261()    (at91_cpu_identify() == ARCH_ID_AT91SAM9261)
+#else
+#define cpu_is_at91sam9261()    (0)
+#endif
+
+#endif