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hardware.h

/*
 * arch/arm/mach-ns9xxx/include/mach/hardware.h
 *
 * Copyright (C) 2006 by Digi International Inc.
 * All rights reserved.
 *
 * 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

#include <asm/memory.h>

/*
 * NetSilicon NS9xxx internal mapping:
 *
 * physical                <--> virtual
 * 0x90000000 - 0x906fffff <--> 0xf9000000 - 0xf96fffff
 * 0xa0100000 - 0xa0afffff <--> 0xfa100000 - 0xfaafffff
 */
#define io_p2v(x) (0xf0000000 \
                   + (((x) & 0xf0000000) >> 4) \
                   + ((x) & 0x00ffffff))

#define io_v2p(x) ((((x) & 0x0f000000) << 4) \
                   + ((x) & 0x00ffffff))

#define __REGSHIFT(mask)      ((mask) & (-(mask)))

#define __REGBIT(bit)         ((u32)1 << (bit))
#define __REGBITS(hbit, lbit) ((((u32)1 << ((hbit) - (lbit) + 1)) - 1) << (lbit))
#define __REGVAL(mask, value) (((value) * __REGSHIFT(mask)) & (mask))

#ifndef __ASSEMBLY__

#  define __REG(x)      ((void __iomem __force *)io_p2v((x)))
#  define __REG2(x, y)  ((void __iomem __force *)(io_p2v((x)) + 4 * (y)))

#  define __REGSET(var, field, value)                             \
      ((var) = (((var) & ~((field) & ~(value))) | (value)))

#  define REGSET(var, reg, field, value)                    \
      __REGSET(var, reg ## _ ## field, reg ## _ ## field ## _ ## value)

#  define REGSET_IDX(var, reg, field, idx, value)                 \
      __REGSET(var, reg ## _ ## field((idx)), reg ## _ ## field ## _ ## value((idx)))

#  define REGSETIM(var, reg, field, value)                        \
      __REGSET(var, reg ## _ ## field, __REGVAL(reg ## _ ## field, (value)))

#  define REGSETIM_IDX(var, reg, field, idx, value)               \
      __REGSET(var, reg ## _ ## field((idx)), __REGVAL(reg ## _ ## field((idx)), (value)))

#  define __REGGET(var, field)                                    \
      (((var) & (field)))

#  define REGGET(var, reg, field)                           \
       __REGGET(var, reg ## _ ## field)

#  define REGGET_IDX(var, reg, field, idx)                        \
       __REGGET(var, reg ## _ ## field((idx)))

#  define REGGETIM(var, reg, field)                         \
       __REGGET(var, reg ## _ ## field) / __REGSHIFT(reg ## _ ## field)

#  define REGGETIM_IDX(var, reg, field, idx)                      \
       __REGGET(var, reg ## _ ## field((idx))) /                  \
       __REGSHIFT(reg ## _ ## field((idx)))

#else

#  define __REG(x)      io_p2v(x)
#  define __REG2(x, y)  io_p2v((x) + 4 * (y))

#endif

#endif /* ifndef __ASM_ARCH_HARDWARE_H */

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