147 lines
4.9 KiB
C
147 lines
4.9 KiB
C
/* $NetBSD: uvm_physseg.h,v 1.8 2017/01/02 20:08:32 cherry Exp $ */
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/*-
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* Copyright (c) 2016 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Cherry G. Mathew <cherry@NetBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Consolidated API from uvm_page.c and others.
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* Consolidated and designed by Cherry G. Mathew <cherry@NetBSD.org>
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*/
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#ifndef _UVM_UVM_PHYSSEG_H_
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#define _UVM_UVM_PHYSSEG_H_
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#if defined(_KERNEL_OPT)
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#include "opt_uvm_hotplug.h"
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#endif
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <sys/types.h>
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/*
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* No APIs are explicitly #included in uvm_physseg.c
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*/
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#if defined(UVM_HOTPLUG) /* rbtree impementation */
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#define PRIxPHYSSEG "p"
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/*
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* These are specific values of invalid constants for uvm_physseg_t.
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* uvm_physseg_valid_p() == false on any of the below constants.
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*
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* Specific invalid constants encapsulate specific explicit failure
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* scenarios (see the comments next to them)
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*/
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#define UVM_PHYSSEG_TYPE_INVALID NULL /* Generic invalid value */
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#define UVM_PHYSSEG_TYPE_INVALID_EMPTY NULL /* empty segment access */
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#define UVM_PHYSSEG_TYPE_INVALID_OVERFLOW NULL /* ran off the end of the last segment */
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typedef struct uvm_physseg * uvm_physseg_t;
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#else /* UVM_HOTPLUG */
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#define PRIxPHYSSEG "d"
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/*
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* These are specific values of invalid constants for uvm_physseg_t.
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* uvm_physseg_valid_p() == false on any of the below constants.
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*
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* Specific invalid constants encapsulate specific explicit failure
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* scenarios (see the comments next to them)
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*/
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#define UVM_PHYSSEG_TYPE_INVALID -1 /* Generic invalid value */
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#define UVM_PHYSSEG_TYPE_INVALID_EMPTY -1 /* empty segment access */
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#define UVM_PHYSSEG_TYPE_INVALID_OVERFLOW (uvm_physseg_get_last() + 1) /* ran off the end of the last segment */
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typedef int uvm_physseg_t;
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#endif /* UVM_HOTPLUG */
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void uvm_physseg_init(void);
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bool uvm_physseg_valid_p(uvm_physseg_t);
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/*
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* Return start/end pfn of given segment
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* Returns: -1 if the segment number is invalid
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*/
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paddr_t uvm_physseg_get_start(uvm_physseg_t);
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paddr_t uvm_physseg_get_end(uvm_physseg_t);
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paddr_t uvm_physseg_get_avail_start(uvm_physseg_t);
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paddr_t uvm_physseg_get_avail_end(uvm_physseg_t);
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struct vm_page * uvm_physseg_get_pg(uvm_physseg_t, paddr_t);
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#ifdef __HAVE_PMAP_PHYSSEG
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struct pmap_physseg * uvm_physseg_get_pmseg(uvm_physseg_t);
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#endif
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int uvm_physseg_get_free_list(uvm_physseg_t);
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u_int uvm_physseg_get_start_hint(uvm_physseg_t);
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bool uvm_physseg_set_start_hint(uvm_physseg_t, u_int);
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/*
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* Functions to help walk the list of segments.
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* Returns: NULL if the segment number is invalid
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*/
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uvm_physseg_t uvm_physseg_get_next(uvm_physseg_t);
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uvm_physseg_t uvm_physseg_get_prev(uvm_physseg_t);
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uvm_physseg_t uvm_physseg_get_first(void);
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uvm_physseg_t uvm_physseg_get_last(void);
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/* Return the frame number of the highest registered physical page frame */
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paddr_t uvm_physseg_get_highest_frame(void);
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/* Actually, uvm_page_physload takes PF#s which need their own type */
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uvm_physseg_t uvm_page_physload(paddr_t, paddr_t, paddr_t,
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paddr_t, int);
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bool uvm_page_physunload(uvm_physseg_t, int, paddr_t *);
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bool uvm_page_physunload_force(uvm_physseg_t, int, paddr_t *);
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uvm_physseg_t uvm_physseg_find(paddr_t, psize_t *);
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bool uvm_physseg_plug(paddr_t, size_t, uvm_physseg_t *);
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bool uvm_physseg_unplug(paddr_t, size_t);
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#if defined(UVM_PHYSSEG_LEGACY)
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/*
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* XXX: Legacy: This needs to be upgraded to a full pa management
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* layer.
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*/
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void uvm_physseg_set_avail_start(uvm_physseg_t, paddr_t);
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void uvm_physseg_set_avail_end(uvm_physseg_t, paddr_t);
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#endif /* UVM_PHYSSEG_LEGACY */
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#endif /* _UVM_UVM_PHYSSEG_H_ */
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