forked from Qortal/Brooklyn
2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
#ifndef __ASM_MEMORY_MODEL_H
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#define __ASM_MEMORY_MODEL_H
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#include <linux/pfn.h>
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#ifndef __ASSEMBLY__
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#if defined(CONFIG_FLATMEM)
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#ifndef ARCH_PFN_OFFSET
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#define ARCH_PFN_OFFSET (0UL)
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#endif
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#elif defined(CONFIG_DISCONTIGMEM)
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#ifndef arch_pfn_to_nid
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#define arch_pfn_to_nid(pfn) pfn_to_nid(pfn)
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#endif
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#ifndef arch_local_page_offset
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#define arch_local_page_offset(pfn, nid) \
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((pfn) - NODE_DATA(nid)->node_start_pfn)
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#endif
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#endif /* CONFIG_DISCONTIGMEM */
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/*
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* supports 3 memory models.
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*/
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#if defined(CONFIG_FLATMEM)
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#define __pfn_to_page(pfn) (mem_map + ((pfn) - ARCH_PFN_OFFSET))
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#define __page_to_pfn(page) ((unsigned long)((page) - mem_map) + \
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ARCH_PFN_OFFSET)
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#elif defined(CONFIG_DISCONTIGMEM)
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#define __pfn_to_page(pfn) \
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({ unsigned long __pfn = (pfn); \
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unsigned long __nid = arch_pfn_to_nid(__pfn); \
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NODE_DATA(__nid)->node_mem_map + arch_local_page_offset(__pfn, __nid);\
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})
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#define __page_to_pfn(pg) \
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({ const struct page *__pg = (pg); \
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struct pglist_data *__pgdat = NODE_DATA(page_to_nid(__pg)); \
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(unsigned long)(__pg - __pgdat->node_mem_map) + \
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__pgdat->node_start_pfn; \
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})
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#elif defined(CONFIG_SPARSEMEM_VMEMMAP)
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/* memmap is virtually contiguous. */
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#define __pfn_to_page(pfn) (vmemmap + (pfn))
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#define __page_to_pfn(page) (unsigned long)((page) - vmemmap)
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#elif defined(CONFIG_SPARSEMEM)
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/*
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* Note: section's mem_map is encoded to reflect its start_pfn.
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* section[i].section_mem_map == mem_map's address - start_pfn;
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*/
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#define __page_to_pfn(pg) \
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({ const struct page *__pg = (pg); \
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int __sec = page_to_section(__pg); \
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(unsigned long)(__pg - __section_mem_map_addr(__nr_to_section(__sec))); \
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})
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#define __pfn_to_page(pfn) \
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({ unsigned long __pfn = (pfn); \
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struct mem_section *__sec = __pfn_to_section(__pfn); \
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__section_mem_map_addr(__sec) + __pfn; \
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})
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#endif /* CONFIG_FLATMEM/DISCONTIGMEM/SPARSEMEM */
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/*
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* Convert a physical address to a Page Frame Number and back
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*/
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#define __phys_to_pfn(paddr) PHYS_PFN(paddr)
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#define __pfn_to_phys(pfn) PFN_PHYS(pfn)
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#define page_to_pfn __page_to_pfn
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#define pfn_to_page __pfn_to_page
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#endif /* __ASSEMBLY__ */
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#endif
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