vm_phys.h

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2002-2006 Rice University
 * Copyright (c) 2007 Alan L. Cox <alc@cs.rice.edu>
 * All rights reserved.
 *
 * This software was developed for the FreeBSD Project by Alan L. Cox,
 * Olivier Crameri, Peter Druschel, Sitaram Iyer, and Juan Navarro.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */
 
/*
 *      Physical memory system definitions
 */
 
#ifndef _VM_PHYS_H_
#define _VM_PHYS_H_
 
#ifdef _KERNEL
 
extern vm_paddr_t phys_avail[];
 
/* Domains must be dense (non-sparse) and zero-based. */
struct mem_affinity {
        vm_paddr_t start;
        vm_paddr_t end;
        int domain;
};
#ifdef NUMA
extern struct mem_affinity *mem_affinity;
extern int *mem_locality;
#endif
 
/*
 * The following functions are only to be used by the virtual memory system.
 */
void vm_phys_add_seg(vm_paddr_t start, vm_paddr_t end);
vm_page_t vm_phys_alloc_contig(int domain, u_long npages, vm_paddr_t low,
    vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
vm_page_t vm_phys_alloc_freelist_pages(int domain, int freelist, int pool,
    int order);
int vm_phys_alloc_npages(int domain, int pool, int npages, vm_page_t ma[]);
vm_page_t vm_phys_alloc_pages(int domain, int pool, int order);
int vm_phys_domain_match(int prefer, vm_paddr_t low, vm_paddr_t high);
void vm_phys_enqueue_contig(vm_page_t m, u_long npages);
int vm_phys_fictitious_reg_range(vm_paddr_t start, vm_paddr_t end,
    vm_memattr_t memattr);
void vm_phys_fictitious_unreg_range(vm_paddr_t start, vm_paddr_t end);
vm_page_t vm_phys_fictitious_to_vm_page(vm_paddr_t pa);
void vm_phys_free_contig(vm_page_t m, u_long npages);
void vm_phys_free_pages(vm_page_t m, int order);
void vm_phys_init(void);
vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
void vm_phys_register_domains(int ndomains, struct mem_affinity *affinity,
    int *locality);
vm_page_t vm_phys_scan_contig(int domain, u_long npages, vm_paddr_t low,
    vm_paddr_t high, u_long alignment, vm_paddr_t boundary, int options);
boolean_t vm_phys_unfree_page(vm_page_t m);
int vm_phys_mem_affinity(int f, int t);
void vm_phys_early_add_seg(vm_paddr_t start, vm_paddr_t end);
vm_paddr_t vm_phys_early_alloc(int domain, size_t alloc_size);
void vm_phys_early_startup(void);
int vm_phys_avail_largest(void);
vm_paddr_t vm_phys_avail_size(int i);
bool vm_phys_is_dumpable(vm_paddr_t pa);
 
static inline int
vm_phys_domain(vm_paddr_t pa)
{
#ifdef NUMA
        int i;
 
        if (vm_ndomains == 1)
                return (0);
        for (i = 0; mem_affinity[i].end != 0; i++)
                if (mem_affinity[i].start <= pa &&
                    mem_affinity[i].end >= pa)
                        return (mem_affinity[i].domain);
        return (-1);
#else
        return (0);
#endif
}
 
#endif  /* _KERNEL */
#endif  /* !_VM_PHYS_H_ */