diff options
Diffstat (limited to 'sys/alpha/include/sf_buf.h')
-rw-r--r-- | sys/alpha/include/sf_buf.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sys/alpha/include/sf_buf.h b/sys/alpha/include/sf_buf.h new file mode 100644 index 0000000..8c7d7a6 --- /dev/null +++ b/sys/alpha/include/sf_buf.h @@ -0,0 +1,57 @@ +/*- + * Copyright (c) 2003 Alan L. Cox <alc@cs.rice.edu> + * 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. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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. + * + * $FreeBSD$ + */ + +#ifndef _MACHINE_SF_BUF_H_ +#define _MACHINE_SF_BUF_H_ + +#include <sys/queue.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> +#include <vm/vm_page.h> + +struct sf_buf { + SLIST_ENTRY(sf_buf) free_list; /* list of free buffer slots */ + vm_page_t m; /* currently mapped page */ +}; + +static __inline vm_offset_t +sf_buf_kva(struct sf_buf *sf) +{ + + return (ALPHA_PHYS_TO_K0SEG(sf->m->phys_addr)); +} + +static __inline vm_page_t +sf_buf_page(struct sf_buf *sf) +{ + + return (sf->m); +} + +#endif /* !_MACHINE_SF_BUF_H_ */ |