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/** @file
* IPRT - Parameter Definitions.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef IPRT_INCLUDED_param_h
#define IPRT_INCLUDED_param_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/** @todo Much of the PAGE_* stuff here is obsolete and highly risky to have around.
* As for component configs (MM_*), either we gather all in here or we move those bits away! */
/** @defgroup grp_rt_param System Parameter Definitions
* @ingroup grp_rt_cdefs
* @{
*/
/* Undefine PAGE_SIZE and PAGE_SHIFT to avoid unnecessary noice when clashing
* with system headers. Include system headers before / after iprt depending
* on which you wish to take precedence. */
#undef PAGE_SIZE
#undef PAGE_SHIFT
/* Undefine PAGE_OFFSET_MASK to avoid the conflict with the-linux-kernel.h */
#undef PAGE_OFFSET_MASK
/**
* i386 Page size.
*/
#if defined(RT_ARCH_SPARC64)
# define PAGE_SIZE 8192
#else
# define PAGE_SIZE 4096
#endif
/**
* i386 Page shift.
* This is used to convert between size (in bytes) and page count.
*/
#if defined(RT_ARCH_SPARC64)
# define PAGE_SHIFT 13
#else
# define PAGE_SHIFT 12
#endif
/**
* i386 Page offset mask.
*
* Do NOT one-complement this for whatever purpose. You may get a 32-bit const when you want a 64-bit one.
* Use PAGE_BASE_MASK, PAGE_BASE_GC_MASK, PAGE_BASE_HC_MASK, PAGE_ADDRESS() or X86_PTE_PAE_PG_MASK.
*/
#if defined(RT_ARCH_SPARC64)
# define PAGE_OFFSET_MASK 0x1fff
#else
# define PAGE_OFFSET_MASK 0xfff
#endif
/**
* Page address mask for the guest context POINTERS.
* @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
*/
#define PAGE_BASE_GC_MASK (~(RTGCUINTPTR)PAGE_OFFSET_MASK)
/**
* Page address mask for the host context POINTERS.
* @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
*/
#define PAGE_BASE_HC_MASK (~(RTHCUINTPTR)PAGE_OFFSET_MASK)
/**
* Page address mask for the both context POINTERS.
*
* Be careful when using this since it may be a size too big!
* @remark Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
*/
#define PAGE_BASE_MASK (~(RTUINTPTR)PAGE_OFFSET_MASK)
/**
* Get the page aligned address of a POINTER in the CURRENT context.
*
* @returns Page aligned address (it's an uintptr_t).
* @param pv The virtual address to align.
*
* @remarks Physical addresses are always masked using X86_PTE_PAE_PG_MASK!
* @remarks This only works with POINTERS in the current context.
* Do NOT use on guest address or physical address!
*/
#define PAGE_ADDRESS(pv) ((uintptr_t)(pv) & ~(uintptr_t)PAGE_OFFSET_MASK)
/**
* Get the page aligned address of a physical address
*
* @returns Page aligned address (it's an RTHCPHYS or RTGCPHYS).
* @param Phys The physical address to align.
*/
#define PHYS_PAGE_ADDRESS(Phys) ((Phys) & X86_PTE_PAE_PG_MASK)
/**
* Host max path (the reasonable value).
* @remarks defined both by iprt/param.h and iprt/path.h.
*/
#if !defined(IPRT_INCLUDED_path_h) || defined(DOXYGEN_RUNNING)
# define RTPATH_MAX (4096 + 4) /* (PATH_MAX + 1) on linux w/ some alignment */
#endif
/** @} */
/** @} */
#endif /* !IPRT_INCLUDED_param_h */
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