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/*
* Copyright (c) 2010, 2011 Richard Braun.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _VM_VM_PAGE_H
#define _VM_VM_PAGE_H
#include <kern/list.h>
#include <kern/macros.h>
#include <kern/param.h>
#include <kern/types.h>
/*
* Address/page conversion and rounding macros (not inline functions to
* be easily usable on both virtual and physical addresses, which may not
* have the same type size).
*/
#define vm_page_atop(addr) ((addr) >> PAGE_SHIFT)
#define vm_page_ptoa(page) ((page) << PAGE_SHIFT)
#define vm_page_trunc(addr) P2ALIGN(addr, PAGE_SIZE)
#define vm_page_round(addr) P2ROUND(addr, PAGE_SIZE)
#define vm_page_aligned(addr) P2ALIGNED(addr, PAGE_SIZE)
/*
* Physical page descriptor.
*/
struct vm_page {
struct list node;
unsigned short seg_index;
unsigned short order;
phys_addr_t phys_addr;
void *slab_priv;
};
static inline phys_addr_t
vm_page_to_pa(const struct vm_page *page)
{
return page->phys_addr;
}
#endif /* _VM_VM_PAGE_H */
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