d343041caa
Introduce explicit abstractions for different mapping types, handling the instantiation, forking, pagefaults and freeing of anonymous memory, direct physical mappings, shared memory and physically contiguous anonymous memory as separate types, making region.c more generic. Also some other genericification like merging the 3 munmap cases into one. COW and SMAP safemap code is still implicit in region.c.
87 lines
2.2 KiB
C
87 lines
2.2 KiB
C
#ifndef _SYS_MMAN_H_
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#define _SYS_MMAN_H_
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#include <sys/featuretest.h>
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#include <machine/ansi.h>
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#include <minix/type.h>
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#ifdef _BSD_SIZE_T_
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typedef _BSD_SIZE_T_ size_t;
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#undef _BSD_SIZE_T_
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#endif
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#include <sys/ansi.h>
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#ifndef mode_t
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typedef __mode_t mode_t;
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#define mode_t __mode_t
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#endif
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#ifndef off_t
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typedef __off_t off_t; /* file offset */
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#define off_t __off_t
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#endif
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/*
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* Protections are chosen from these bits, or-ed together
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*/
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#define PROT_NONE 0x00 /* no permissions */
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#define PROT_READ 0x01 /* pages can be read */
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#define PROT_WRITE 0x02 /* pages can be written */
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#define PROT_EXEC 0x04 /* pages can be executed */
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/*
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* Flags contain sharing type and options.
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* Sharing types; choose one.
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*/
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#ifndef __minix
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#define MAP_SHARED 0x0001 /* share changes */
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#endif
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#define MAP_PRIVATE 0x0002 /* changes are private */
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/*
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* Mapping type
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*/
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#define MAP_ANON 0x0004 /* anonymous memory */
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/*
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* Minix specific flags.
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*/
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#define MAP_PREALLOC 0x0008 /* not on-demand */
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#define MAP_CONTIG 0x0010 /* contiguous in physical memory */
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#define MAP_LOWER16M 0x0020 /* physically below 16MB */
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#define MAP_ALIGN64K 0x0040 /* physically aligned at 64kB */
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#define MAP_LOWER1M 0x0080 /* physically below 16MB */
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#define MAP_ALIGNMENT_64KB MAP_ALIGN64K
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#define MAP_FIXED 0x0200 /* require mapping to happen at hint */
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#define MAP_THIRDPARTY 0x0400 /* perform on behalf of any process */
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#define MAP_UNINITIALIZED 0x0800 /* do not clear memory */
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/*
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* Error indicator returned by mmap(2)
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*/
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#define MAP_FAILED ((void *) -1) /* mmap() failed */
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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#ifndef __minix
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void * mmap(void *, size_t, int, int, int, off_t);
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int munmap(void *, size_t);
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#else
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void * minix_mmap(void *, size_t, int, int, int, off_t);
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void * minix_mmap_for(endpoint_t, void *, size_t, int, int, int, off_t);
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int minix_munmap(void *, size_t);
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void * vm_remap(int d, int s, void *da, void *sa, size_t si);
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void * vm_remap_ro(int d, int s, void *da, void *sa, size_t si);
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int vm_unmap(int endpt, void *addr);
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unsigned long vm_getphys(int endpt, void *addr);
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u8_t vm_getrefcount(int endpt, void *addr);
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#endif /* __minix */
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__END_DECLS
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#endif /* !_SYS_MMAN_H_ */
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