1 /*-
2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
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.
13 *
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
24 * SUCH DAMAGE.
25 *
26 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
27 * $FreeBSD$
28 */
29
30 #ifndef _MACHINE_PCPU_H_
31 #define _MACHINE_PCPU_H_
32
33 #ifdef _KERNEL
34
35 #include <sys/_lock.h>
36 #include <sys/_mutex.h>
37
38 #define ALT_STACK_SIZE 128
39
40 struct vmspace;
41
42 #endif /* _KERNEL */
43
44 #if __ARM_ARCH >= 6
45 /* Branch predictor hardening method */
46 #define PCPU_BP_HARDEN_KIND_NONE 0
47 #define PCPU_BP_HARDEN_KIND_BPIALL 1
48 #define PCPU_BP_HARDEN_KIND_ICIALLU 2
49
50 #define PCPU_MD_FIELDS \
51 unsigned int pc_vfpsid; \
52 unsigned int pc_vfpmvfr0; \
53 unsigned int pc_vfpmvfr1; \
54 struct pmap *pc_curpmap; \
55 struct mtx pc_cmap_lock; \
56 void *pc_cmap1_pte2p; \
57 void *pc_cmap2_pte2p; \
58 caddr_t pc_cmap1_addr; \
59 caddr_t pc_cmap2_addr; \
60 vm_offset_t pc_qmap_addr; \
61 void *pc_qmap_pte2p; \
62 unsigned int pc_dbreg[32]; \
63 int pc_dbreg_cmd; \
64 int pc_bp_harden_kind; \
65 uint32_t pc_original_actlr; \
66 char __pad[11]
67 #else
68 #define PCPU_MD_FIELDS \
69 char __pad[157]
70 #endif
71
72 #ifdef _KERNEL
73
74 #define PC_DBREG_CMD_NONE 0
75 #define PC_DBREG_CMD_LOAD 1
76
77 struct pcb;
78 struct pcpu;
79
80 extern struct pcpu *pcpup;
81
82 #if __ARM_ARCH >= 6
83 #define CPU_MASK (0xf)
84
85 #ifndef SMP
86 #define get_pcpu() (pcpup)
87 #else
88 #define get_pcpu() __extension__ ({ \
89 int id; \
90 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \
91 (pcpup + (id & CPU_MASK)); \
92 })
93 #endif
94
95 static inline struct thread *
get_curthread(void)96 get_curthread(void)
97 {
98 void *ret;
99
100 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
101 return (ret);
102 }
103
104 static inline void
set_curthread(struct thread * td)105 set_curthread(struct thread *td)
106 {
107
108 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
109 }
110
111
112 static inline void *
get_tls(void)113 get_tls(void)
114 {
115 void *tls;
116
117 /* TPIDRURW contains the authoritative value. */
118 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
119 return (tls);
120 }
121
122 static inline void
set_tls(void * tls)123 set_tls(void *tls)
124 {
125
126 /*
127 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
128 * first to ensure that a context switch between the two writes will
129 * still give the desired result of updating both.
130 */
131 __asm __volatile(
132 "mcr p15, 0, %0, c13, c0, 2\n"
133 "mcr p15, 0, %0, c13, c0, 3\n"
134 : : "r" (tls));
135 }
136
137 #define curthread get_curthread()
138
139 #else
140 #define get_pcpu() pcpup
141 #endif
142
143 #define PCPU_GET(member) (get_pcpu()->pc_ ## member)
144 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
145 #define PCPU_INC(member) PCPU_ADD(member, 1)
146 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member)
147 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value))
148
149 void pcpu0_init(void);
150 #endif /* _KERNEL */
151
152 #endif /* !_MACHINE_PCPU_H_ */
153