59 строки
1.8 KiB
C
59 строки
1.8 KiB
C
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/* include/asm-arm/arch-lh7a40x/hardware.h
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*
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* Copyright (C) 2004 Coastal Environmental Systems
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*
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* [ Substantially cribbed from include/asm-arm/arch-pxa/hardware.h ]
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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*/
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#ifndef __ASM_ARCH_HARDWARE_H
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#define __ASM_ARCH_HARDWARE_H
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#define io_p2v(x) (0xf0000000 | (((x) & 0xfff00000) >> 4) | ((x) & 0x0000ffff))
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#define io_v2p(x) ( (((x) & 0x0fff0000) << 4) | ((x) & 0x0000ffff))
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#ifdef __ASSEMBLY__
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# define __REG(x) io_p2v(x)
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# define __PREG(x) io_v2p(x)
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#else
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# if 0
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# define __REG(x) (*((volatile u32 *)io_p2v(x)))
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# else
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/*
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* This __REG() version gives the same results as the one above, except
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* that we are fooling gcc somehow so it generates far better and smaller
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* assembly code for access to contigous registers. It's a shame that gcc
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* doesn't guess this by itself.
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*/
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#include <asm/types.h>
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typedef struct { volatile u32 offset[4096]; } __regbase;
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# define __REGP(x) ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
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# define __REG(x) __REGP(io_p2v(x))
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typedef struct { volatile u16 offset[4096]; } __regbase16;
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# define __REGP16(x) ((__regbase16 *)((x)&~4095))->offset[((x)&4095)>>1]
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# define __REG16(x) __REGP16(io_p2v(x))
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typedef struct { volatile u8 offset[4096]; } __regbase8;
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# define __REGP8(x) ((__regbase8 *)((x)&~4095))->offset[(x)&4095]
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# define __REG8(x) __REGP8(io_p2v(x))
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#endif
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/* Let's kick gcc's ass again... */
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# define __REG2(x,y) \
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( __builtin_constant_p(y) ? (__REG((x) + (y))) \
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: (*(volatile u32 *)((u32)&__REG(x) + (y))) )
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# define __PREG(x) (io_v2p((u32)&(x)))
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#endif
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#include "registers.h"
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#endif /* _ASM_ARCH_HARDWARE_H */
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