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Diffstat (limited to 'include/asm-arm/arch-lh7a40x/hardware.h')
-rw-r--r--include/asm-arm/arch-lh7a40x/hardware.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/include/asm-arm/arch-lh7a40x/hardware.h b/include/asm-arm/arch-lh7a40x/hardware.h
new file mode 100644
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+++ b/include/asm-arm/arch-lh7a40x/hardware.h
@@ -0,0 +1,58 @@
+/* include/asm-arm/arch-lh7a40x/hardware.h
+ *
+ * Copyright (C) 2004 Coastal Environmental Systems
+ *
+ * [ Substantially cribbed from include/asm-arm/arch-pxa/hardware.h ]
+ *
+ * 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_HARDWARE_H
+#define __ASM_ARCH_HARDWARE_H
+
+#define io_p2v(x) (0xf0000000 | (((x) & 0xfff00000) >> 4) | ((x) & 0x0000ffff))
+#define io_v2p(x) ( (((x) & 0x0fff0000) << 4) | ((x) & 0x0000ffff))
+
+#ifdef __ASSEMBLY__
+
+# define __REG(x) io_p2v(x)
+# define __PREG(x) io_v2p(x)
+
+#else
+
+# if 0
+# define __REG(x) (*((volatile u32 *)io_p2v(x)))
+# else
+/*
+ * This __REG() version gives the same results as the one above, except
+ * that we are fooling gcc somehow so it generates far better and smaller
+ * assembly code for access to contigous registers. It's a shame that gcc
+ * doesn't guess this by itself.
+ */
+#include <asm/types.h>
+typedef struct { volatile u32 offset[4096]; } __regbase;
+# define __REGP(x) ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
+# define __REG(x) __REGP(io_p2v(x))
+typedef struct { volatile u16 offset[4096]; } __regbase16;
+# define __REGP16(x) ((__regbase16 *)((x)&~4095))->offset[((x)&4095)>>1]
+# define __REG16(x) __REGP16(io_p2v(x))
+typedef struct { volatile u8 offset[4096]; } __regbase8;
+# define __REGP8(x) ((__regbase8 *)((x)&~4095))->offset[(x)&4095]
+# define __REG8(x) __REGP8(io_p2v(x))
+#endif
+
+/* Let's kick gcc's ass again... */
+# define __REG2(x,y) \
+ ( __builtin_constant_p(y) ? (__REG((x) + (y))) \
+ : (*(volatile u32 *)((u32)&__REG(x) + (y))) )
+
+# define __PREG(x) (io_v2p((u32)&(x)))
+
+#endif
+
+#include "registers.h"
+
+#endif /* _ASM_ARCH_HARDWARE_H */
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