memory.h
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上传日期:2013-02-24
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- /*
- * linux/include/asm-arm/arch-l7200/memory.h
- *
- * Copyright (c) 2000 Steve Hill (sjhill@cotw.com)
- * Copyright (c) 2000 Rob Scott (rscott@mtrob.fdns.net)
- *
- * Changelog:
- * 03-13-2000 SJH Created
- * 04-13-2000 RS Changed bus macros for new addr
- * 05-03-2000 SJH Removed bus macros and fixed virt_to_phys macro
- */
- #ifndef __ASM_ARCH_MEMORY_H
- #define __ASM_ARCH_MEMORY_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)
- /*
- * Physical DRAM offset on the L7200 SDB.
- */
- #define PHYS_OFFSET (0xf0000000UL)
- /*
- * The DRAM is contiguous.
- */
- #define __virt_to_phys__is_a_macro
- #define __virt_to_phys(vpage) ((vpage) - PAGE_OFFSET + PHYS_OFFSET)
- #define __phys_to_virt__is_a_macro
- #define __phys_to_virt(ppage) ((ppage) + PAGE_OFFSET - PHYS_OFFSET)
- #define __virt_to_bus__is_a_macro
- #define __virt_to_bus(x) __virt_to_phys(x)
- #define __bus_to_virt__is_a_macro
- #define __bus_to_virt(x) __phys_to_virt(x)
- #define PHYS_TO_NID(addr) (0)
- #endif