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32 lines
907 B
32 lines
907 B
20 years ago
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#ifndef _CRIS_ARCH_PAGE_H
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#define _CRIS_ARCH_PAGE_H
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#include <linux/config.h>
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#ifdef __KERNEL__
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/* This handles the memory map.. */
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#ifdef CONFIG_CRIS_LOW_MAP
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#define PAGE_OFFSET KSEG_6 /* kseg_6 is mapped to physical ram */
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#else
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#define PAGE_OFFSET KSEG_C /* kseg_c is mapped to physical ram */
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#endif
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/* macros to convert between really physical and virtual addresses
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* by stripping a selected bit, we can convert between KSEG_x and 0x40000000 where
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* the DRAM really resides
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*/
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#ifdef CONFIG_CRIS_LOW_MAP
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/* we have DRAM virtually at 0x6 */
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#define __pa(x) ((unsigned long)(x) & 0xdfffffff)
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#define __va(x) ((void *)((unsigned long)(x) | 0x20000000))
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#else
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/* we have DRAM virtually at 0xc */
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#define __pa(x) ((unsigned long)(x) & 0x7fffffff)
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#define __va(x) ((void *)((unsigned long)(x) | 0x80000000))
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#endif
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#endif
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#endif
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