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1 /*-
2  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
3  * Copyright (c) Peter Wemm <peter@netplex.com.au>
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 1. Redistributions of source code must retain the above copyright
10  *    notice, this list of conditions and the following disclaimer.
11  * 2. Redistributions in binary form must reproduce the above copyright
12  *    notice, this list of conditions and the following disclaimer in the
13  *    documentation and/or other materials provided with the distribution.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25  * SUCH DAMAGE.
26  *
27  * $FreeBSD$
28  */
29
30 #ifndef _MACHINE_PCPU_H_
31 #define _MACHINE_PCPU_H_
32
33 #include <machine/cpufunc.h>
34 #include <machine/slb.h>
35 #include <machine/tlb.h>
36
37 struct pmap;
38 #define CPUSAVE_LEN     9
39
40 #define PCPU_MD_COMMON_FIELDS                                           \
41         int             pc_inside_intr;                                 \
42         struct pmap     *pc_curpmap;            /* current pmap */      \
43         struct thread   *pc_fputhread;          /* current fpu user */  \
44         struct thread   *pc_vecthread;          /* current vec user */  \
45         uintptr_t       pc_hwref;                                       \
46         uint32_t        pc_pir;                                         \
47         int             pc_bsp;                                         \
48         volatile int    pc_awake;                                       \
49         uint32_t        pc_ipimask;                                     \
50         register_t      pc_tempsave[CPUSAVE_LEN];                       \
51         register_t      pc_disisave[CPUSAVE_LEN];                       \
52         register_t      pc_dbsave[CPUSAVE_LEN];
53
54 #define PCPU_MD_AIM32_FIELDS
55
56 #define PCPU_MD_AIM64_FIELDS                                            \
57         struct slb      pc_slb[64];                                     \
58         struct slb      **pc_userslb;
59
60 #ifdef __powerpc64__
61 #define PCPU_MD_AIM_FIELDS      PCPU_MD_AIM64_FIELDS
62 #else
63 #define PCPU_MD_AIM_FIELDS      PCPU_MD_AIM32_FIELDS
64 #endif
65
66 #define BOOKE_CRITSAVE_LEN      (CPUSAVE_LEN + 2)
67 #define BOOKE_TLB_MAXNEST       3
68 #define BOOKE_TLB_SAVELEN       16
69 #define BOOKE_TLBSAVE_LEN       (BOOKE_TLB_SAVELEN * BOOKE_TLB_MAXNEST)
70
71 #define PCPU_MD_BOOKE_FIELDS                                            \
72         register_t      pc_booke_critsave[BOOKE_CRITSAVE_LEN];          \
73         register_t      pc_booke_mchksave[CPUSAVE_LEN];                 \
74         register_t      pc_booke_tlbsave[BOOKE_TLBSAVE_LEN];            \
75         register_t      pc_booke_tlb_level;                             \
76         uint32_t        *pc_booke_tlb_lock;                             \
77         int             pc_tid_next;
78
79 /* Definitions for register offsets within the exception tmp save areas */
80 #define CPUSAVE_R27     0               /* where r27 gets saved */
81 #define CPUSAVE_R28     1               /* where r28 gets saved */
82 #define CPUSAVE_R29     2               /* where r29 gets saved */
83 #define CPUSAVE_R30     3               /* where r30 gets saved */
84 #define CPUSAVE_R31     4               /* where r31 gets saved */
85 #define CPUSAVE_AIM_DAR         5       /* where SPR_DAR gets saved */
86 #define CPUSAVE_AIM_DSISR       6       /* where SPR_DSISR gets saved */
87 #define CPUSAVE_BOOKE_DEAR      5       /* where SPR_DEAR gets saved */
88 #define CPUSAVE_BOOKE_ESR       6       /* where SPR_ESR gets saved */
89 #define CPUSAVE_SRR0    7               /* where SRR0 gets saved */
90 #define CPUSAVE_SRR1    8               /* where SRR1 gets saved */
91
92 /* Book-E TLBSAVE is more elaborate */
93 #define TLBSAVE_BOOKE_LR        0
94 #define TLBSAVE_BOOKE_CR        1
95 #define TLBSAVE_BOOKE_SRR0      2
96 #define TLBSAVE_BOOKE_SRR1      3
97 #define TLBSAVE_BOOKE_R20       4
98 #define TLBSAVE_BOOKE_R21       5
99 #define TLBSAVE_BOOKE_R22       6
100 #define TLBSAVE_BOOKE_R23       7
101 #define TLBSAVE_BOOKE_R24       8
102 #define TLBSAVE_BOOKE_R25       9
103 #define TLBSAVE_BOOKE_R26       10
104 #define TLBSAVE_BOOKE_R27       11
105 #define TLBSAVE_BOOKE_R28       12
106 #define TLBSAVE_BOOKE_R29       13
107 #define TLBSAVE_BOOKE_R30       14
108 #define TLBSAVE_BOOKE_R31       15
109
110 #ifndef COMPILING_LINT
111 #ifdef AIM
112 #define PCPU_MD_FIELDS          \
113         PCPU_MD_COMMON_FIELDS   \
114         PCPU_MD_AIM_FIELDS
115 #endif
116 #ifdef E500
117 #define PCPU_MD_FIELDS          \
118         PCPU_MD_COMMON_FIELDS   \
119         PCPU_MD_BOOKE_FIELDS
120 #endif
121 #else
122 #define PCPU_MD_FIELDS          \
123         PCPU_MD_COMMON_FIELDS   \
124         PCPU_MD_AIM_FIELDS      \
125         PCPU_MD_BOOKE_FIELDS
126 #endif
127 /*
128  * Catch-all for ports (e.g. lsof, used by gtop)
129  */
130 #ifndef PCPU_MD_FIELDS
131 #define PCPU_MD_FIELDS                                                  \
132         int             pc_md_placeholder
133 #endif
134
135 #ifdef _KERNEL
136
137 #define pcpup   ((struct pcpu *) powerpc_get_pcpup())
138 #ifdef __powerpc64__
139 register struct thread *curthread_reg __asm("%r13");
140 #else
141 register struct thread *curthread_reg __asm("%r2");
142 #endif
143 #ifdef AIM /* Book-E not yet adapted */
144 #define curthread       curthread_reg
145 #endif
146
147 #define PCPU_GET(member)        (pcpup->pc_ ## member)
148
149 /*
150  * XXX The implementation of this operation should be made atomic
151  * with respect to preemption.
152  */
153 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
154 #define PCPU_INC(member)        PCPU_ADD(member, 1)
155 #define PCPU_PTR(member)        (&pcpup->pc_ ## member)
156 #define PCPU_SET(member,value)  (pcpup->pc_ ## member = (value))
157
158 #endif  /* _KERNEL */
159
160 #endif  /* !_MACHINE_PCPU_H_ */