release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/plat-omap/include/plat/memory.h

   1 /*
   2  * arch/arm/plat-omap/include/mach/memory.h
   3  *
   4  * Memory map for OMAP-1510 and 1610
   5  *
   6  * Copyright (C) 2000 RidgeRun, Inc.
   7  * Author: Greg Lonnon <glonnon@ridgerun.com>
   8  *
   9  * This file was derived from arch/arm/mach-intergrator/include/mach/memory.h
  10  * Copyright (C) 1999 ARM Limited
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.
  16  *
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  20  * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23  * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  24  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * You should have received a copy of the GNU General Public License along
  29  * with this program; if not, write to the Free Software Foundation, Inc.,
  30  * 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #ifndef __ASM_ARCH_MEMORY_H
  34 #define __ASM_ARCH_MEMORY_H
  35
  36 /*
  37  * Physical DRAM offset.
  38  */
  39 #if defined(CONFIG_ARCH_OMAP1)
  40 #define PHYS_OFFSET             UL(0x10000000)
  41 #else
  42 #define PHYS_OFFSET             UL(0x80000000)
  43 #endif
  44
  45 /*
  46  * Bus address is physical address, except for OMAP-1510 Local Bus.
  47  * OMAP-1510 bus address is translated into a Local Bus address if the
  48  * OMAP bus type is lbus. We do the address translation based on the
  49  * device overriding the defaults used in the dma-mapping API.
  50  * Note that the is_lbus_device() test is not very efficient on 1510
  51  * because of the strncmp().
  52  */
  53 #ifdef CONFIG_ARCH_OMAP15XX
  54
  55 /*
  56  * OMAP-1510 Local Bus address offset
  57  */
  58 #define OMAP1510_LB_OFFSET      UL(0x30000000)
  59
  60 #define virt_to_lbus(x)         ((x) - PAGE_OFFSET + OMAP1510_LB_OFFSET)
  61 #define lbus_to_virt(x)         ((x) - OMAP1510_LB_OFFSET + PAGE_OFFSET)
  62 #define is_lbus_device(dev)     (cpu_is_omap15xx() && dev && (strncmp(dev_name(dev), "ohci", 4) == 0))
  63
  64 #define __arch_page_to_dma(dev, page)   \
  65         ({ dma_addr_t __dma = page_to_phys(page); \
  66            if (is_lbus_device(dev)) \
  67                 __dma = __dma - PHYS_OFFSET + OMAP1510_LB_OFFSET; \
  68            __dma; })
  69
  70 #define __arch_dma_to_page(dev, addr)   \
  71         ({ dma_addr_t __dma = addr;                             \
  72            if (is_lbus_device(dev))                             \
  73                 __dma += PHYS_OFFSET - OMAP1510_LB_OFFSET;      \
  74            phys_to_page(__dma);                                 \
  75         })
  76
  77 #define __arch_dma_to_virt(dev, addr)   ({ (void *) (is_lbus_device(dev) ? \
  78                                                 lbus_to_virt(addr) : \
  79                                                 __phys_to_virt(addr)); })
  80
  81 #define __arch_virt_to_dma(dev, addr)   ({ unsigned long __addr = (unsigned long)(addr); \
  82                                            (dma_addr_t) (is_lbus_device(dev) ? \
  83                                                 virt_to_lbus(__addr) : \
  84                                                 __virt_to_phys(__addr)); })
  85
  86 #endif  /* CONFIG_ARCH_OMAP15XX */
  87
  88 /* Override the ARM default */
  89 #ifdef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
  90
  91 #if (CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE == 0)
  92 #undef CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE
  93 #define CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE 2
  94 #endif
  95
  96 #define CONSISTENT_DMA_SIZE \
  97         (((CONFIG_FB_OMAP_CONSISTENT_DMA_SIZE + 1) & ~1) * 1024 * 1024)
  98
  99 #endif
 100
 101 #endif