include/asm-arm/arch-lh7a40x/hardware.h

   1 /* include/asm-arm/arch-lh7a40x/hardware.h
   2  *
   3  *  Copyright (C) 2004 Coastal Environmental Systems
   4  *
   5  *  [ Substantially cribbed from include/asm-arm/arch-pxa/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>
  38 typedef 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))
  41 typedef 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))
  44 typedef 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 */