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//
// pframe.h
//
// Page frame database routines
//
// Copyright (C) 2002 Michael Ringgaard. All rights reserved.
//
// 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.
// 3. Neither the name of the project nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// 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 OWNER 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.
//
#ifndef PFRAME_H
#define PFRAME_H
#define DMA_BUFFER_START 0x10000
#define DMA_BUFFER_PAGES 16
struct pageframe {
unsigned long tag;
union {
unsigned long locks; // Number of locks
unsigned long size; // Size/buckets for kernel pages
handle_t owner; // Reference to owner for file maps
struct pageframe *next; // Next free page frame for free pages
};
};
extern struct pageframe *pfdb;
extern unsigned long freemem;
extern unsigned long totalmem;
extern unsigned long maxmem;
krnlapi unsigned long alloc_pageframe(unsigned long tag);
krnlapi unsigned long alloc_linear_pageframes(int pages, unsigned long tag);
krnlapi void free_pageframe(unsigned long pfn);
krnlapi void set_pageframe_tag(void *addr, unsigned int len, unsigned long tag);
void tag2str(unsigned long tag, char *str);
int memmap_proc(struct proc_file *pf, void *arg);
int memusage_proc(struct proc_file *pf, void *arg);
int memstat_proc(struct proc_file *pf, void *arg);
int physmem_proc(struct proc_file *pf, void *arg);
void init_pfdb();
#endif