freebsd-nq/sys/sys/jumbo.h
Andrew Gallatin a83560d677 Remove the advertising clause from the Duke BSD copyright on the
zero-copy files

Requested by: rwatson
Approved by: Jeff Chase (my old boss at Duke)
2002-07-06 02:44:15 +00:00

60 lines
2.1 KiB
C

/*-
* Copyright (c) 1997, Duke University
* All rights reserved.
*
* Author:
* Andrew Gallatin <gallatin@cs.duke.edu>
*
* 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. The name of Duke University may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY DUKE UNIVERSITY ``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 DUKE UNIVERSITY 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 PROFITSOR 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.
*
* $FreeBSD$
*/
#ifndef _SYS_JUMBO_H_
#define _SYS_JUMBO_H_
#ifdef _KERNEL
extern vm_offset_t jumbo_basekva;
static __inline caddr_t jumbo_phys_to_kva(vm_offset_t pa);
static __inline caddr_t
jumbo_phys_to_kva(vm_offset_t pa)
{
vm_page_t pg;
pg = PHYS_TO_VM_PAGE(pa);
pg->flags &= ~PG_BUSY;
return (caddr_t)(ptoa(pg->pindex) + jumbo_basekva);
}
int jumbo_vm_init(void);
void jumbo_freem(void *addr, void *args);
vm_page_t jumbo_pg_alloc(void);
void jumbo_pg_free(vm_offset_t addr);
void jumbo_pg_steal(vm_page_t pg);
#endif /* _KERNEL */
#endif /* !_SYS_JUMBO_H_ */