include/asm-arm/arch-ns9xxx/hardware.h

   1 /*
   2  * include/asm-arm/arch-ns9xxx/hardware.h
   3  *
   4  * Copyright (C) 2006 by Digi International Inc.
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  */
  11 #ifndef __ASM_ARCH_HARDWARE_H
  12 #define __ASM_ARCH_HARDWARE_H
  13
  14 #include <asm/memory.h>
  15
  16 /*
  17  * NetSilicon NS9xxx internal mapping:
  18  *
  19  * physical                <--> virtual
  20  * 0x90000000 - 0x906fffff <--> 0xf9000000 - 0xf96fffff
  21  * 0xa0100000 - 0xa0afffff <--> 0xfa100000 - 0xfaafffff
  22  */
  23 #define io_p2v(x)       (0xf0000000 \
  24                          + (((x) & 0xf0000000) >> 4) \
  25                          + ((x) & 0x00ffffff))
  26
  27 #define io_v2p(x)       ((((x) & 0x0f000000) << 4) \
  28                          + ((x) & 0x00ffffff))
  29
  30 #define __REGBIT(bit)           ((u32)1 << (bit))
  31 #define __REGBITS(hbit, lbit)   ((((u32)1 << ((hbit) - (lbit) + 1)) - 1) << (lbit))
  32 #define __REGVAL(mask, value)   (((value) * ((mask) & (-(mask))) & (mask)))
  33
  34 #ifndef __ASSEMBLY__
  35
  36 #  define __REG(x)      (*((volatile u32 *)io_p2v((x))))
  37 #  define __REG2(x, y)  (*((volatile u32 *)io_p2v((x)) + (y)))
  38
  39 #  define __REGB(x)     (*((volatile u8 *)io_p2v((x))))
  40 #  define __REGB2(x)    (*((volatile u8 *)io_p2v((x)) + (y)))
  41
  42 #  define REGSET(var, reg, field, value)                                \
  43         ((var) = (((var)                                                \
  44                    & ~(reg ## _ ## field &                              \
  45                        ~ reg ## _ ## field ## _ ## value))              \
  46                   | (reg ## _ ## field ## _ ## value)))
  47
  48 #  define REGSETIM(var, reg, field, value)                              \
  49         ((var) = (((var)                                                \
  50                    & ~(reg ## _ ## field &                              \
  51                        ~(__REGVAL(reg ## _ ## field, value))))          \
  52                   | (__REGVAL(reg ## _ ## field, value))))
  53
  54 #  define REGGET(var, reg, field)                                       \
  55         ((var & (reg ## _ ## field)) /                                  \
  56          ((reg ## _ ## field) & (-(reg ## _ ## field))))
  57
  58 #else
  59
  60 #  define __REG(x)      io_p2v(x)
  61 #  define __REG2(x, y)  io_p2v((x) + (y))
  62
  63 #  define __REGB(x)     __REG((x))
  64 #  define __REGB2(x, y) __REG2((x), (y))
  65
  66 #endif
  67
  68 #endif /* ifndef __ASM_ARCH_HARDWARE_H */