headers/private/graphics/radeon/mmio.h

   1 /*
   2         Copyright (c) 2002, Thomas Kurschel
   3
   4
   5         Part of Radeon driver
   6
   7         Macros for easier memory mapped I/O access
   8 */
   9
  10 #ifndef _MMIO_H
  11 #define _MMIO_H
  12
  13 // read 8-bit register
  14 #define INREG8( regs, addr ) (*(regs + (addr)))
  15 // write 8-bit register
  16 #define OUTREG8( regs, addr, val ) do { *(regs + (addr)) = (val); } while( 0 )
  17 // read 32-bit register
  18 #define INREG( regs, addr ) (*((vuint32 *)(regs + (addr))))
  19 // write 32-bit register
  20 #define OUTREG( regs, addr, val ) do { *(vuint32 *)(regs + (addr)) = (val); } while( 0 )
  21 // write partial 32-bit register, keeping bits "mask"
  22 #define OUTREGP( regs, addr, val, mask )                                  \
  23         do {                                                                  \
  24                 uint32 tmp = INREG( (regs), (addr) );                             \
  25                 tmp &= (mask);                                                    \
  26                 tmp |= (val) & ~(mask);                                           \
  27                 OUTREG( (regs), (addr), tmp );                                    \
  28         } while (0)
  29
  30 #endif