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/*-
* Copyright (c) 2005 Peter Grehan
* 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_MMUVAR_H_
#define _MACHINE_MMUVAR_H_
/*
* A PowerPC MMU implementation is declared with a kernel object and
* an associated method table. The MMU_DEF macro is used to declare
* the class, and also links it to the global MMU class list.
*
* e.g.
*
* static mmu_method_t ppc8xx_methods[] = {
* MMUMETHOD(mmu_change_wiring, ppc8xx_mmu_change_wiring),
* MMUMETHOD(mmu_clear_modify, ppc8xx_mmu_clear_modify),
* MMUMETHOD(mmu_clear_reference, ppc8xx_mmu_clear_reference),
* ...
* MMUMETHOD(mmu_dev_direct_mapped, ppc8xx_mmu_dev_direct_mapped),
* { 0, 0 }
* };
*
* MMU_DEF(ppc8xx, MMU_TYPE_8xx, ppc8xx_methods, sizeof(ppc8xx_mmu_softc));
*
* A single level of inheritance is supported in a similar fashion to
* kobj inheritance e.g.
*
* MMU_DEF_1(ppc860c, MMU_TYPE_860c, ppc860c_methods, 0, ppc8xx);
*/
#include <sys/kobj.h>
struct mmu_kobj {
/*
* An MMU instance is a kernel object
*/
KOBJ_FIELDS;
/*
* Utility elements that an instance may use
*/
struct mtx mmu_mtx; /* available for instance use */
void *mmu_iptr; /* instance data pointer */
/*
* Opaque data that can be overlaid with an instance-private
* structure. MMU code can test that this is large enough at
* compile time with a sizeof() test againt it's softc. There
* is also a run-time test when the MMU kernel object is
* registered.
*/
#define MMU_OPAQUESZ 64
u_int mmu_opaque[MMU_OPAQUESZ];
};
typedef struct mmu_kobj *mmu_t;
typedef struct kobj_class mmu_def_t;
#define mmu_method_t kobj_method_t
#define MMUMETHOD KOBJMETHOD
#define MMU_DEF(name, ident, methods, size) \
\
mmu_def_t name = { \
ident, methods, size, NULL \
}; \
DATA_SET(mmu_set, name)
#define MMU_DEF_INHERIT(name, ident, methods, size, base1) \
\
static kobj_class_t name ## _baseclasses[] = \
{ &base1, NULL }; \
mmu_def_t name = { \
ident, methods, size, name ## _baseclasses \
}; \
DATA_SET(mmu_set, name)
#if 0
mmu_def_t name = { \
ident, methods, size, name ## _baseclasses \
};
DATA_SET(mmu_set, name)
#endif
/*
* Known MMU names
*/
#define MMU_TYPE_BOOKE "mmu_booke" /* Book-E MMU specification */
#define MMU_TYPE_OEA "mmu_oea" /* 32-bit OEA */
#define MMU_TYPE_G5 "mmu_g5" /* 64-bit bridge (ibm 970) */
#define MMU_TYPE_8xx "mmu_8xx" /* 8xx quicc TLB */
#endif /* _MACHINE_MMUVAR_H_ */
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