f5ea64dcba
The typesafe version of the powerpc pagetable handling (with USE_STRICT_MM_TYPECHECKS defined) has bitrotted again. This patch makes a bunch of small fixes to get it back to building status. It's still not enabled by default as gcc still generates worse code with it for some reason. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
#ifndef _ASM_POWERPC_MMAN_H
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#define _ASM_POWERPC_MMAN_H
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#include <asm-generic/mman.h>
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/*
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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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#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 MAP_POPULATE 0x8000 /* populate (prefault) pagetables */
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#define MAP_NONBLOCK 0x10000 /* do not block on IO */
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#ifdef __KERNEL__
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#ifdef CONFIG_PPC64
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#include <asm/cputable.h>
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#include <linux/mm.h>
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/*
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* This file is included by linux/mman.h, so we can't use cacl_vm_prot_bits()
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* here. How important is the optimization?
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*/
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static inline unsigned long arch_calc_vm_prot_bits(unsigned long prot)
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{
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return (prot & PROT_SAO) ? VM_SAO : 0;
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}
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#define arch_calc_vm_prot_bits(prot) arch_calc_vm_prot_bits(prot)
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static inline pgprot_t arch_vm_get_page_prot(unsigned long vm_flags)
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{
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return (vm_flags & VM_SAO) ? __pgprot(_PAGE_SAO) : __pgprot(0);
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}
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#define arch_vm_get_page_prot(vm_flags) arch_vm_get_page_prot(vm_flags)
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static inline int arch_validate_prot(unsigned long prot)
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{
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if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC | PROT_SEM | PROT_SAO))
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return 0;
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if ((prot & PROT_SAO) && !cpu_has_feature(CPU_FTR_SAO))
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return 0;
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return 1;
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}
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#define arch_validate_prot(prot) arch_validate_prot(prot)
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#endif /* CONFIG_PPC64 */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_MMAN_H */
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