[ARM] Add a common typesafe __io implementation

[deliverable/linux.git] / arch / arm / mach-orion5x / include / mach / io.h

/*
 * arch/arm/mach-orion5x/include/mach/io.h
 *
 * Tzachi Perelstein <tzachi@marvell.com>
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#ifndef __ASM_ARCH_IO_H
#define __ASM_ARCH_IO_H

#include "orion5x.h"

#define IO_SPACE_LIMIT		0xffffffff

static inline void __iomem *
__arch_ioremap(unsigned long paddr, size_t size, unsigned int mtype)
{
	void __iomem *retval;
	unsigned long offs = paddr - ORION5X_REGS_PHYS_BASE;
	if (mtype == MT_DEVICE && size && offs < ORION5X_REGS_SIZE &&
	    size <= ORION5X_REGS_SIZE && offs + size <= ORION5X_REGS_SIZE) {
		retval = (void __iomem *)ORION5X_REGS_VIRT_BASE + offs;
	} else {
		retval = __arm_ioremap(paddr, size, mtype);
	}

	return retval;
}

static inline void
__arch_iounmap(void __iomem *addr)
{
	if (addr < (void __iomem *)ORION5X_REGS_VIRT_BASE ||
	    addr >= (void __iomem *)(ORION5X_REGS_VIRT_BASE + ORION5X_REGS_SIZE))
		__iounmap(addr);
}

#define __arch_ioremap(p, s, m)	__arch_ioremap(p, s, m)
#define __arch_iounmap(a)	__arch_iounmap(a)
#define __io(a)			__typesafe_io(a)
#define __mem_pci(a)		(a)


/*****************************************************************************
 * Helpers to access Orion registers
 ****************************************************************************/
/*
 * These are not preempt-safe.  Locks, if needed, must be taken
 * care of by the caller.
 */
#define orion5x_setbits(r, mask)	writel(readl(r) | (mask), (r))
#define orion5x_clrbits(r, mask)	writel(readl(r) & ~(mask), (r))


#endif