2 * Copyright (c) 2001 Jake Burkholder.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #ifndef _MACHINE_TLB_H_
30 #define _MACHINE_TLB_H_
32 #define TLB_DIRECT_ADDRESS_BITS (43)
33 #define TLB_DIRECT_PAGE_BITS (PAGE_SHIFT_4M)
35 #define TLB_DIRECT_ADDRESS_MASK ((1UL << TLB_DIRECT_ADDRESS_BITS) - 1)
36 #define TLB_DIRECT_PAGE_MASK ((1UL << TLB_DIRECT_PAGE_BITS) - 1)
38 #define TLB_PHYS_TO_DIRECT(pa) \
39 ((pa) | VM_MIN_DIRECT_ADDRESS)
40 #define TLB_DIRECT_TO_PHYS(va) \
41 ((va) & TLB_DIRECT_ADDRESS_MASK)
42 #define TLB_DIRECT_TO_TTE_MASK \
43 (TD_V | TD_4M | (TLB_DIRECT_ADDRESS_MASK - TLB_DIRECT_PAGE_MASK))
45 #define TLB_DAR_SLOT_SHIFT (3)
46 #define TLB_DAR_SLOT(slot) ((slot) << TLB_DAR_SLOT_SHIFT)
48 #define TAR_VPN_SHIFT (13)
49 #define TAR_CTX_MASK ((1 << TAR_VPN_SHIFT) - 1)
51 #define TLB_TAR_VA(va) ((va) & ~TAR_CTX_MASK)
52 #define TLB_TAR_CTX(ctx) ((ctx) & TAR_CTX_MASK)
54 #define TLB_DEMAP_ID_SHIFT (4)
55 #define TLB_DEMAP_ID_PRIMARY (0)
56 #define TLB_DEMAP_ID_SECONDARY (1)
57 #define TLB_DEMAP_ID_NUCLEUS (2)
59 #define TLB_DEMAP_TYPE_SHIFT (6)
60 #define TLB_DEMAP_TYPE_PAGE (0)
61 #define TLB_DEMAP_TYPE_CONTEXT (1)
63 #define TLB_DEMAP_VA(va) ((va) & ~PAGE_MASK)
64 #define TLB_DEMAP_ID(id) ((id) << TLB_DEMAP_ID_SHIFT)
65 #define TLB_DEMAP_TYPE(type) ((type) << TLB_DEMAP_TYPE_SHIFT)
67 #define TLB_DEMAP_PAGE (TLB_DEMAP_TYPE(TLB_DEMAP_TYPE_PAGE))
68 #define TLB_DEMAP_CONTEXT (TLB_DEMAP_TYPE(TLB_DEMAP_TYPE_CONTEXT))
70 #define TLB_DEMAP_PRIMARY (TLB_DEMAP_ID(TLB_DEMAP_ID_PRIMARY))
71 #define TLB_DEMAP_SECONDARY (TLB_DEMAP_ID(TLB_DEMAP_ID_SECONDARY))
72 #define TLB_DEMAP_NUCLEUS (TLB_DEMAP_ID(TLB_DEMAP_ID_NUCLEUS))
74 #define TLB_CTX_KERNEL (0)
75 #define TLB_CTX_USER_MIN (1)
76 #define TLB_CTX_USER_MAX (8192)
78 typedef void tlb_flush_user_t(void);
83 extern int kernel_tlb_slots;
84 extern struct tlb_entry *kernel_tlbs;
86 void tlb_context_demap(struct pmap *pm);
87 void tlb_page_demap(struct pmap *pm, vm_offset_t va);
88 void tlb_range_demap(struct pmap *pm, vm_offset_t start, vm_offset_t end);
90 tlb_flush_user_t cheetah_tlb_flush_user;
91 tlb_flush_user_t spitfire_tlb_flush_user;
93 extern tlb_flush_user_t *tlb_flush_user;
95 #endif /* !_MACHINE_TLB_H_ */