LXR linux/arch/arm/mach-lh7a40x/include/mach/hardware.h

   1/* arch/arm/mach-lh7a40x/include/mach/hardware.h
   2 *
   3 *  Copyright (C) 2004 Coastal Environmental Systems
   4 *
   5 *  [ Substantially cribbed from arch/arm/mach-pxa/include/mach/hardware.h ]
   6 *
   7 *  This program is free software; you can redistribute it and/or
   8 *  modify it under the terms of the GNU General Public License
   9 *  version 2 as published by the Free Software Foundation.
  10 *
  11 */
  12
  13#ifndef __ASM_ARCH_HARDWARE_H
  14#define __ASM_ARCH_HARDWARE_H
  15
  16#include <asm/sizes.h>          /* Added for the sake of amba-clcd driver */
  17
  18#define io_p2v(x) (0xf0000000 | (((x) & 0xfff00000) >> 4) | ((x) & 0x0000ffff))
  19#define io_v2p(x) (             (((x) & 0x0fff0000) << 4) | ((x) & 0x0000ffff))
  20
  21#ifdef __ASSEMBLY__
  22
  23# define __REG(x)       io_p2v(x)
  24# define __PREG(x)      io_v2p(x)
  25
  26#else
  27
  28# if 0
  29#  define __REG(x)      (*((volatile u32 *)io_p2v(x)))
  30# else
  31/*
  32 * This __REG() version gives the same results as the one above,  except
  33 * that we are fooling gcc somehow so it generates far better and smaller
  34 * assembly code for access to contigous registers.  It's a shame that gcc
  35 * doesn't guess this by itself.
  36 */
  37#include <asm/types.h>
  38typedef struct { volatile u32 offset[4096]; } __regbase;
  39# define __REGP(x)      ((__regbase *)((x)&~4095))->offset[((x)&4095)>>2]
  40# define __REG(x)       __REGP(io_p2v(x))
  41typedef struct { volatile u16 offset[4096]; } __regbase16;
  42# define __REGP16(x)    ((__regbase16 *)((x)&~4095))->offset[((x)&4095)>>1]
  43# define __REG16(x)     __REGP16(io_p2v(x))
  44typedef struct { volatile u8 offset[4096]; } __regbase8;
  45# define __REGP8(x)     ((__regbase8 *)((x)&~4095))->offset[(x)&4095]
  46# define __REG8(x)      __REGP8(io_p2v(x))
  47#endif
  48
  49/* Let's kick gcc's ass again... */
  50# define __REG2(x,y)    \
  51        ( __builtin_constant_p(y) ? (__REG((x) + (y))) \
  52                                  : (*(volatile u32 *)((u32)&__REG(x) + (y))) )
  53
  54# define __PREG(x)      (io_v2p((u32)&(x)))
  55
  56#endif
  57
  58#define MASK_AND_SET(v,m,s)     (v) = ((v)&~(m))|(s)
  59
  60#include "registers.h"
  61
  62#endif  /* _ASM_ARCH_HARDWARE_H */
  63