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memory.h

/*
 * Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#ifndef __ASM_ARCH_MXC_MEMORY_H__
#define __ASM_ARCH_MXC_MEMORY_H__

#include <asm/page.h>
#include <asm/sizes.h>

/* Start of physical RAM */
#if defined(CONFIG_MACH_MX35EVB) || defined(CONFIG_ARCH_MX51)
#define PHYS_OFFSET             UL(0x90000000)
#endif

#ifdef CONFIG_MACH_MX27ADS
#define PHYS_OFFSET             UL(0xA0000000)
#endif

#ifdef CONFIG_MACH_MX37_3DS
#define PHYS_OFFSET             UL(0x40000000)
#endif

#ifndef PHYS_OFFSET
#define PHYS_OFFSET             UL(0x80000000)
#endif

/* Size of contiguous memory for DMA and other h/w blocks */
#ifdef CONFIG_ARCH_MX51
#define CONSISTENT_DMA_SIZE   (64 * SZ_1M)
#else
#define CONSISTENT_DMA_SIZE   (32 * SZ_1M)
#endif

#ifndef __ASSEMBLY__

#ifdef CONFIG_DMA_ZONE_SIZE
#define MXC_DMA_ZONE_SIZE     ((CONFIG_DMA_ZONE_SIZE * SZ_1M) >> PAGE_SHIFT)
#else
#define MXC_DMA_ZONE_SIZE     ((12 * SZ_1M) >> PAGE_SHIFT)
#endif

static inline void __arch_adjust_zones(int node, unsigned long *zone_size,
                               unsigned long *zhole_size)
{
      if (node != 0)
            return;
      /* Create separate zone to reserve memory for DMA */
      zone_size[1] = zone_size[0] - MXC_DMA_ZONE_SIZE;
      zone_size[0] = MXC_DMA_ZONE_SIZE;
      zhole_size[1] = zhole_size[0];
      zhole_size[0] = 0;
}

#define arch_adjust_zones(node, size, holes) \
      __arch_adjust_zones(node, size, holes)

#endif

/*
 * Virtual view <-> DMA view memory address translations
 * This macro is used to translate the virtual address to an address
 * suitable to be passed to set_dma_addr()
 */
#define __virt_to_bus(a)      __virt_to_phys(a)

/*
 * Used to convert an address for DMA operations to an address that the
 * kernel can use.
 */
#define __bus_to_virt(a)      __phys_to_virt(a)

#endif /* __ASM_ARCH_MXC_MEMORY_H__ */

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