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memory.h
Package: linux-2.4.20.tar.gz　[view]
Upload User: jlfgdled
Upload Date: 2013-04-10
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Code Size: 1k
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Linux-Unix program

Development Platform:

Unix_Linux

memory.h：Code Content
  1. /*
  2.  * linux/include/asm-arm/arch-tbox/memory.h
  3.  *
  4.  * Copyright (c) 1996-1999 Russell King.
  5.  * Copyright (c) 1998-1999 Phil Blundell
  6.  */
  7. #ifndef __ASM_ARCH_MEMORY_H
  8. #define __ASM_ARCH_MEMORY_H
  10. /*
  11.  * Task size: 3GB
  12.  */
  13. #define TASK_SIZE (0xc0000000UL)
  14. #define TASK_SIZE_26 (0x04000000UL)
  16. /*
  17.  * This decides where the kernel will search for a free chunk of vm
  18.  * space during mmap's.
  19.  */
  20. #define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
  22. /*
  23.  * Page offset: 3GB
  24.  */
  25. #define PAGE_OFFSET (0xc0000000UL)
  26. #define PHYS_OFFSET (0x80000000UL)
  28. /*
  29.  * DRAM is contiguous
  30.  */
  31. #define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET)
  32. #define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET)
  33. #define __virt_to_phys__is_a_macro
  34. #define __phys_to_virt__is_a_macro
  36. /*
  37.  * Bus view is the same as physical view
  38.  */
  39. #define __virt_to_bus__is_a_macro
  40. #define __virt_to_bus(x) __virt_to_phys(x)
  41. #define __bus_to_virt__is_a_macro
  42. #define __bus_to_virt(x) __phys_to_virt(x)
  44. #define PHYS_TO_NID(addr) (0)
  46. #endif