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

   1 /*
   2  * Platform memory layout definitions
   3  *
   4  * Note: due to dependencies in common architecture code
   5  * some mappings go in other header files.
   6  */
   7 #ifndef __ASM_ARCH_MEMORY_H
   8 #define __ASM_ARCH_MEMORY_H
   9
  10 /*
  11  * Main memory base address and size
  12  * are defined from the board-level configuration file
  13  */
  14
  15 #ifndef PHYS_OFFSET
  16 #define PHYS_OFFSET             UL(CONFIG_DRAM_BASE)
  17 #endif
  18
  19
  20
  21 /*
  22  * DMA memory
  23  *
  24  * The PCIe-to-AXI mapping (PAX) has a window of 128 MB alighed at 1MB
  25  * we should make the DMA-able DRAM at least this large.
  26  * Will need to use CONSISTENT_BASE and CONSISTENT_SIZE macros
  27  * to program the PAX inbound mapping registers.
  28  */
  29 #define CONSISTENT_DMA_SIZE     SZ_128M
  30
  31 /* 2nd physical memory window */
  32 #define PHYS_OFFSET2            0x80000000
  33
  34 #if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA)
  35 extern void bcm47xx_adjust_zones(unsigned long *size, unsigned long *hole);
  36 #define arch_adjust_zones(size, hole) \
  37         bcm47xx_adjust_zones(size, hole)
  38
  39 #define ISA_DMA_THRESHOLD       (PHYS_OFFSET + SZ_128M - 1)
  40 #define MAX_DMA_ADDRESS         (PAGE_OFFSET + SZ_128M)
  41 #endif
  42
  43 #ifdef CONFIG_SPARSEMEM
  44
  45 #define MAX_PHYSMEM_BITS        32
  46 #define SECTION_SIZE_BITS       27
  47
  48 /* bank page offsets */
  49 #define PAGE_OFFSET1    (PAGE_OFFSET + SZ_128M)
  50
  51 #define __phys_to_virt(phys)                                            \
  52         ((phys) >= PHYS_OFFSET2 ? (phys) - PHYS_OFFSET2 + PAGE_OFFSET1 :        \
  53          (phys) + PAGE_OFFSET)
  54
  55 #define __virt_to_phys(virt)                                            \
  56          ((virt) >= PAGE_OFFSET1 ? (virt) - PAGE_OFFSET1 + PHYS_OFFSET2 :       \
  57           (virt) - PAGE_OFFSET)
  58
  59 #else
  60 #define __virt_to_phys(x)       ((x) - PAGE_OFFSET + PHYS_OFFSET)
  61 #define __phys_to_virt(x)       ((x) - PHYS_OFFSET + PAGE_OFFSET)
  62 #endif
  63
  64
  65 #endif