memory.h
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上传日期:2013-04-10
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- /*
- * linux/include/asm-arm/arch-nexuspci/memory.h
- *
- * Copyright (c) 1997, 1998, 2000 FutureTV Labs Ltd.
- * Copyright (c) 1999 Russell King
- *
- */
- #ifndef __ASM_ARCH_MMU_H
- #define __ASM_ARCH_MMU_H
- /*
- * Task size: 3GB
- */
- #define TASK_SIZE (0xc0000000UL)
- #define TASK_SIZE_26 (0x04000000UL)
- /*
- * This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
- #define TASK_UNMAPPED_BASE (TASK_SIZE / 3)
- /*
- * Page offset: 3GB
- */
- #define PAGE_OFFSET (0xc0000000UL)
- #define PHYS_OFFSET (0x40000000UL)
- #define BUS_OFFSET (0xe0000000UL)
- /*
- * DRAM is contiguous
- */
- #define __virt_to_phys(vpage) ((unsigned long)(vpage) - PAGE_OFFSET + PHYS_OFFSET)
- #define __phys_to_virt(ppage) ((unsigned long)(ppage) + PAGE_OFFSET - PHYS_OFFSET)
- #define __virt_to_phys__is_a_macro
- #define __phys_to_virt__is_a_macro
- /*
- * On the PCI bus the DRAM appears at address 0xe0000000
- */
- #define __virt_to_bus__is_a_macro
- #define __virt_to_bus(x) ((unsigned long)(x) - PAGE_OFFSET + BUS_OFFSET)
- #define __bus_to_virt__is_a_macro
- #define __bus_to_virt(x) ((unsigned long)(x) + PAGE_OFFSET - BUS_OFFSET)
- #define PHYS_TO_NID(addr) (0)
- #endif