1f22be4547
be less ambiguous and more clearly identify what it means. This attribute is what Intel refers to as UC-, and it's only difference relative to normal UC memory is that a WC MTRR will override a UC- PAT entry causing the memory to be treated as WC, whereas a UC PAT entry will always override the MTRR. - Remove the VM_MEMATTR_UNCACHED alias from powerpc.
44 lines
1.7 KiB
C
44 lines
1.7 KiB
C
/*-
|
|
* Copyright (c) 2009 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_VM_H_
|
|
#define _MACHINE_VM_H_
|
|
|
|
#include <machine/pte.h>
|
|
|
|
/* Memory attributes. */
|
|
#define VM_MEMATTR_DEFAULT 0
|
|
#define VM_MEMATTR_UNCACHEABLE 0x01
|
|
#define VM_MEMATTR_CACHEABLE 0x02
|
|
#define VM_MEMATTR_WRITE_COMBINING 0x04
|
|
#define VM_MEMATTR_WRITE_BACK 0x08
|
|
#define VM_MEMATTR_WRITE_THROUGH 0x10
|
|
#define VM_MEMATTR_PREFETCHABLE 0x20
|
|
|
|
#endif /* !_MACHINE_VM_H_ */
|