release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-orion5x/include/mach/io.h

   1 /*
   2  * arch/arm/mach-orion5x/include/mach/io.h
   3  *
   4  * Tzachi Perelstein <tzachi@marvell.com>
   5  *
   6  * This file is licensed under the terms of the GNU General Public
   7  * License version 2.  This program is licensed "as is" without any
   8  * warranty of any kind, whether express or implied.
   9  */
  10
  11 #ifndef __ASM_ARCH_IO_H
  12 #define __ASM_ARCH_IO_H
  13
  14 #include "orion5x.h"
  15
  16 #define IO_SPACE_LIMIT          0xffffffff
  17
  18 static inline void __iomem *
  19 __arch_ioremap(unsigned long paddr, size_t size, unsigned int mtype)
  20 {
  21         void __iomem *retval;
  22         unsigned long offs = paddr - ORION5X_REGS_PHYS_BASE;
  23         if (mtype == MT_DEVICE && size && offs < ORION5X_REGS_SIZE &&
  24             size <= ORION5X_REGS_SIZE && offs + size <= ORION5X_REGS_SIZE) {
  25                 retval = (void __iomem *)ORION5X_REGS_VIRT_BASE + offs;
  26         } else {
  27                 retval = __arm_ioremap(paddr, size, mtype);
  28         }
  29
  30         return retval;
  31 }
  32
  33 static inline void
  34 __arch_iounmap(void __iomem *addr)
  35 {
  36         if (addr < (void __iomem *)ORION5X_REGS_VIRT_BASE ||
  37             addr >= (void __iomem *)(ORION5X_REGS_VIRT_BASE + ORION5X_REGS_SIZE))
  38                 __iounmap(addr);
  39 }
  40
  41 #define __arch_ioremap(p, s, m) __arch_ioremap(p, s, m)
  42 #define __arch_iounmap(a)       __arch_iounmap(a)
  43 #define __io(a)                 __typesafe_io(a)
  44 #define __mem_pci(a)            (a)
  45
  46
  47 /*****************************************************************************
  48  * Helpers to access Orion registers
  49  ****************************************************************************/
  50 /*
  51  * These are not preempt-safe.  Locks, if needed, must be taken
  52  * care of by the caller.
  53  */
  54 #define orion5x_setbits(r, mask)        writel(readl(r) | (mask), (r))
  55 #define orion5x_clrbits(r, mask)        writel(readl(r) & ~(mask), (r))
  56
  57
  58 #endif