2 * Copyright (c) 2005 Peter Grehan
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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29 #ifndef _MACHINE_MMUVAR_H_
30 #define _MACHINE_MMUVAR_H_
33 * A PowerPC MMU implementation is declared with a kernel object and
34 * an associated method table, similar to a device driver.
38 * static mmu_method_t ppc8xx_methods[] = {
39 * MMUMETHOD(mmu_change_wiring, ppc8xx_mmu_change_wiring),
40 * MMUMETHOD(mmu_clear_modify, ppc8xx_mmu_clear_modify),
41 * MMUMETHOD(mmu_clear_reference, ppc8xx_mmu_clear_reference),
43 * MMUMETHOD(mmu_dev_direct_mapped, ppc8xx_mmu_dev_direct_mapped),
47 * static mmu_def_t ppc8xx_mmu = {
50 * sizeof(ppc8xx_mmu_softc), // or 0 if no softc
53 * MMU_DEF(ppc8xx_mmu);
60 * An MMU instance is a kernel object
65 * Utility elements that an instance may use
67 struct mtx mmu_mtx; /* available for instance use */
68 void *mmu_iptr; /* instance data pointer */
71 * Opaque data that can be overlaid with an instance-private
72 * structure. MMU code can test that this is large enough at
73 * compile time with a sizeof() test againt it's softc. There
74 * is also a run-time test when the MMU kernel object is
77 #define MMU_OPAQUESZ 64
78 u_int mmu_opaque[MMU_OPAQUESZ];
81 typedef struct mmu_kobj *mmu_t;
82 typedef struct kobj_class mmu_def_t;
83 #define mmu_method_t kobj_method_t
85 #define MMUMETHOD KOBJMETHOD
87 #define MMU_DEF(name) DATA_SET(mmu_set, name)
92 #define MMU_TYPE_BOOKE "mmu_booke" /* Book-E MMU specification */
93 #define MMU_TYPE_OEA "mmu_oea" /* 32-bit OEA */
94 #define MMU_TYPE_G5 "mmu_g5" /* 64-bit bridge (ibm 970) */
95 #define MMU_TYPE_8xx "mmu_8xx" /* 8xx quicc TLB */
97 #endif /* _MACHINE_MMUVAR_H_ */