1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
5 * Copyright (c) Peter Wemm <peter@netplex.com.au>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * from: src/sys/alpha/include/pcpu.h,v 1.15 2004/11/05 19:16:44 jhb
30 * $FreeBSD$
31 */
32
33 #ifndef _MACHINE_PCPU_H_
34 #define _MACHINE_PCPU_H_
35
36 #include <machine/cpufunc.h>
37 #include <machine/pte.h>
38
39 #define PCPU_MD_COMMON_FIELDS \
40 pd_entry_t *pc_segbase; /* curthread segbase */ \
41 struct pmap *pc_curpmap; /* pmap of curthread */ \
42 u_int32_t pc_next_asid; /* next ASID to alloc */ \
43 u_int32_t pc_asid_generation; /* current ASID generation */ \
44 u_int pc_pending_ipis; /* IPIs pending to this CPU */ \
45 struct pcpu *pc_self; /* globally-uniqe self pointer */
46
47 #ifdef __mips_n64
48 #define PCPU_MD_MIPS64_FIELDS \
49 PCPU_MD_COMMON_FIELDS \
50 char __pad[245]
51 #else
52 #define PCPU_MD_MIPS32_FIELDS \
53 PCPU_MD_COMMON_FIELDS \
54 pt_entry_t *pc_cmap1_ptep; /* PTE for copy window 1 KVA */ \
55 pt_entry_t *pc_cmap2_ptep; /* PTE for copy window 2 KVA */ \
56 vm_offset_t pc_cmap1_addr; /* KVA page for copy window 1 */ \
57 vm_offset_t pc_cmap2_addr; /* KVA page for copy window 2 */ \
58 vm_offset_t pc_qmap_addr; /* KVA page for temporary mappings */ \
59 pt_entry_t *pc_qmap_ptep; /* PTE for temporary mapping KVA */ \
60 char __pad[97]
61 #endif
62
63 #ifdef __mips_n64
64 #define PCPU_MD_FIELDS PCPU_MD_MIPS64_FIELDS
65 #else
66 #define PCPU_MD_FIELDS PCPU_MD_MIPS32_FIELDS
67 #endif
68
69 #ifdef _KERNEL
70
71 extern char pcpu_space[MAXCPU][PAGE_SIZE * 2];
72 #define PCPU_ADDR(cpu) (struct pcpu *)(pcpu_space[(cpu)])
73
74 extern struct pcpu *pcpup;
75 #define PCPUP pcpup
76
77 /*
78 * Since we use a wired TLB entry to map the same VA to a different
79 * physical page for each CPU, get_pcpu() must use the pc_self
80 * field to obtain a globally-unique pointer.
81 */
82 #define get_pcpu() (PCPUP->pc_self)
83
84 #define PCPU_ADD(member, value) (PCPUP->pc_ ## member += (value))
85 #define PCPU_GET(member) (PCPUP->pc_ ## member)
86 #define PCPU_INC(member) PCPU_ADD(member, 1)
87 #define PCPU_PTR(member) (&PCPUP->pc_ ## member)
88 #define PCPU_SET(member,value) (PCPUP->pc_ ## member = (value))
89 #define PCPU_LAZY_INC(member) (++PCPUP->pc_ ## member)
90
91 #ifdef SMP
92 /*
93 * Instantiate the wired TLB entry at PCPU_TLB_ENTRY to map 'pcpu' at 'pcpup'.
94 */
95 void mips_pcpu_tlb_init(struct pcpu *pcpu);
96 #endif
97
98 #endif /* _KERNEL */
99
100 #endif /* !_MACHINE_PCPU_H_ */
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