mirror of
https://github.com/drasko/codezero.git
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da5f4dcff3
- Moved rootfs from being embedded to mm0 image to being an independent image. - MM0 boots up to start_init_process with updated boot convention.
44 lines
1020 B
C
44 lines
1020 B
C
/*
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* Physical memory descriptors
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*
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* Copyright (C) 2007 - 2009 Bahadir Balban
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*/
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#ifndef __PAGER_PHYSMEM_H__
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#define __PAGER_PHYSMEM_H__
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/* A compact memory descriptor to determine used/unused pages in the system */
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struct page_bitmap {
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unsigned long pfn_start;
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unsigned long pfn_end;
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unsigned int map[];
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};
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/* Describes a portion of physical memory. */
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struct memdesc {
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unsigned int start;
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unsigned int end;
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unsigned int free_cur;
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unsigned int free_end;
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unsigned int numpages;
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};
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struct membank {
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unsigned long start;
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unsigned long end;
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unsigned long free;
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struct page *page_array;
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};
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extern struct membank membank[];
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/* Describes bitmap of used/unused state for all physical pages */
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extern struct memdesc physmem;
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/* Sets the global page map as used/unused. Aligns input when needed. */
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int set_page_map(struct page_bitmap *pmap, unsigned long start,
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int numpages, int val);
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void init_physmem_primary();
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void init_physmem_secondary(struct membank *membank);
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#endif /* __PAGER_PHYSMEM_H__ */
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