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2c9faa7675
Add user space exported API definitions for 512KB, 1MB, 2MB, 8MB, 16MB, 1GB, 16GB non default huge page sizes to be used with mmap() system call. Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com> [mpe: Reword the comment to emphasise that these are only needed to use the non-default huge page size, and updated the change log.] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _UAPI_ASM_POWERPC_MMAN_H
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#define _UAPI_ASM_POWERPC_MMAN_H
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#include <asm-generic/mman-common.h>
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#define PROT_SAO 0x10 /* Strong Access Ordering */
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#define MAP_RENAME MAP_ANONYMOUS /* In SunOS terminology */
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#define MAP_NORESERVE 0x40 /* don't reserve swap pages */
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#define MAP_LOCKED 0x80
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#define MAP_GROWSDOWN 0x0100 /* stack-like segment */
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#define MAP_DENYWRITE 0x0800 /* ETXTBSY */
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#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */
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#define MCL_CURRENT 0x2000 /* lock all currently mapped pages */
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#define MCL_FUTURE 0x4000 /* lock all additions to address space */
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#define MCL_ONFAULT 0x8000 /* lock all pages that are faulted in */
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#define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
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#define MAP_NONBLOCK 0x10000 /* do not block on IO */
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#define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */
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#define MAP_HUGETLB 0x40000 /* create a huge page mapping */
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/*
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* When MAP_HUGETLB is set, bits [26:31] of the flags argument to mmap(2),
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* encode the log2 of the huge page size. A value of zero indicates that the
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* default huge page size should be used. To use a non-default huge page size,
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* one of these defines can be used, or the size can be encoded by hand. Note
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* that on most systems only a subset, or possibly none, of these sizes will be
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* available.
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*/
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#define MAP_HUGE_512KB (19 << MAP_HUGE_SHIFT) /* 512KB HugeTLB Page */
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#define MAP_HUGE_1MB (20 << MAP_HUGE_SHIFT) /* 1MB HugeTLB Page */
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#define MAP_HUGE_2MB (21 << MAP_HUGE_SHIFT) /* 2MB HugeTLB Page */
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#define MAP_HUGE_8MB (23 << MAP_HUGE_SHIFT) /* 8MB HugeTLB Page */
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#define MAP_HUGE_16MB (24 << MAP_HUGE_SHIFT) /* 16MB HugeTLB Page */
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#define MAP_HUGE_1GB (30 << MAP_HUGE_SHIFT) /* 1GB HugeTLB Page */
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#define MAP_HUGE_16GB (34 << MAP_HUGE_SHIFT) /* 16GB HugeTLB Page */
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#endif /* _UAPI_ASM_POWERPC_MMAN_H */
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