1/*-
2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
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 * $FreeBSD: head/sys/amd64/include/pcpu.h 255331 2013-09-06 22:17:02Z gibbs $
27 */
28
29#ifndef _MACHINE_PCPU_H_
30#define _MACHINE_PCPU_H_
31
32#ifndef _SYS_CDEFS_H_
33#error "sys/cdefs.h is a prerequisite for this file"
34#endif
35
36/*
37 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
38 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
39 * The reason for doing it via a struct is so that an array of pointers
40 * to each CPU's data can be set up for things like "check curproc on all
41 * other processors"
42 */
43#define PCPU_MD_FIELDS \
44 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
45 struct pcpu *pc_prvspace; /* Self-reference */ \
46 struct pmap *pc_curpmap; \
47 struct amd64tss *pc_tssp; /* TSS segment active on CPU */ \
48 struct amd64tss *pc_commontssp;/* Common TSS for the CPU */ \
49 register_t pc_rsp0; \
50 register_t pc_scratch_rsp; /* User %rsp in syscall */ \
51 u_int pc_apic_id; \
52 u_int pc_acpi_id; /* ACPI CPU id */ \
53 /* Pointer to the CPU %fs descriptor */ \
54 struct user_segment_descriptor *pc_fs32p; \
55 /* Pointer to the CPU %gs descriptor */ \
56 struct user_segment_descriptor *pc_gs32p; \
57 /* Pointer to the CPU LDT descriptor */ \
58 struct system_segment_descriptor *pc_ldt; \
59 /* Pointer to the CPU TSS descriptor */ \
60 struct system_segment_descriptor *pc_tss; \
61 uint64_t pc_pm_save_cnt; \
62 u_int pc_cmci_mask; /* MCx banks for CMCI */ \
63 uint64_t pc_dbreg[16]; /* ddb debugging regs */ \
64 int pc_dbreg_cmd; /* ddb debugging reg cmd */ \
65 char __pad[161] /* be divisor of PAGE_SIZE \
66 after cache alignment */
67
68#define PC_DBREG_CMD_NONE 0
69#define PC_DBREG_CMD_LOAD 1
70
71#ifdef _KERNEL
72
73#ifdef lint
74
75extern struct pcpu *pcpup;
76
77#define PCPU_GET(member) (pcpup->pc_ ## member)
78#define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
79#define PCPU_INC(member) PCPU_ADD(member, 1)
80#define PCPU_PTR(member) (&pcpup->pc_ ## member)
81#define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
82
83#elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
84
85/*
86 * Evaluates to the byte offset of the per-cpu variable name.
87 */
88#define __pcpu_offset(name) \
89 __offsetof(struct pcpu, name)
90
91/*
92 * Evaluates to the type of the per-cpu variable name.
93 */
94#define __pcpu_type(name) \
95 __typeof(((struct pcpu *)0)->name)
96
97/*
98 * Evaluates to the address of the per-cpu variable name.
99 */
100#define __PCPU_PTR(name) __extension__ ({ \
101 __pcpu_type(name) *__p; \
102 \
103 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
104 : "=r" (__p) \
105 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
106 "i" (__pcpu_offset(name))); \
107 \
108 __p; \
109})
110
111/*
112 * Evaluates to the value of the per-cpu variable name.
113 */
114#define __PCPU_GET(name) __extension__ ({ \
115 __pcpu_type(name) __res; \
116 struct __s { \
117 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
118 } __s; \
119 \
120 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
121 sizeof(__res) == 4 || sizeof(__res) == 8) { \
122 __asm __volatile("mov %%gs:%1,%0" \
123 : "=r" (__s) \
124 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
125 *(struct __s *)(void *)&__res = __s; \
126 } else { \
127 __res = *__PCPU_PTR(name); \
128 } \
129 __res; \
130})
131
132/*
133 * Adds the value to the per-cpu counter name. The implementation
134 * must be atomic with respect to interrupts.
135 */
136#define __PCPU_ADD(name, val) do { \
137 __pcpu_type(name) __val; \
138 struct __s { \
139 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
140 } __s; \
141 \
142 __val = (val); \
143 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
144 sizeof(__val) == 4 || sizeof(__val) == 8) { \
145 __s = *(struct __s *)(void *)&__val; \
146 __asm __volatile("add %1,%%gs:%0" \
147 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
148 : "r" (__s)); \
149 } else \
150 *__PCPU_PTR(name) += __val; \
151} while (0)
152
153/*
154 * Increments the value of the per-cpu counter name. The implementation
155 * must be atomic with respect to interrupts.
156 */
157#define __PCPU_INC(name) do { \
158 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
159 sizeof(__pcpu_type(name)) == 2 || \
160 sizeof(__pcpu_type(name)) == 4 || \
161 sizeof(__pcpu_type(name)) == 8); \
162 if (sizeof(__pcpu_type(name)) == 1) { \
163 __asm __volatile("incb %%gs:%0" \
164 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
165 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
166 } else if (sizeof(__pcpu_type(name)) == 2) { \
167 __asm __volatile("incw %%gs:%0" \
168 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
169 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
170 } else if (sizeof(__pcpu_type(name)) == 4) { \
171 __asm __volatile("incl %%gs:%0" \
172 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
173 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
174 } else if (sizeof(__pcpu_type(name)) == 8) { \
175 __asm __volatile("incq %%gs:%0" \
176 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
177 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
178 } \
179} while (0)
180
181/*
182 * Sets the value of the per-cpu variable name to value val.
183 */
184#define __PCPU_SET(name, val) { \
185 __pcpu_type(name) __val; \
186 struct __s { \
187 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
188 } __s; \
189 \
190 __val = (val); \
191 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
192 sizeof(__val) == 4 || sizeof(__val) == 8) { \
193 __s = *(struct __s *)(void *)&__val; \
194 __asm __volatile("mov %1,%%gs:%0" \
195 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
196 : "r" (__s)); \
197 } else { \
198 *__PCPU_PTR(name) = __val; \
199 } \
200}
201
202#define PCPU_GET(member) __PCPU_GET(pc_ ## member)
203#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
204#define PCPU_INC(member) __PCPU_INC(pc_ ## member)
205#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
206#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
207
208#define OFFSETOF_CURTHREAD 0
209#ifdef __clang__
210#pragma clang diagnostic push
211#pragma clang diagnostic ignored "-Wnull-dereference"
212#endif
213static __inline __pure2 struct thread *
214__curthread(void)
215{
216 struct thread *td;
217
218 __asm("movq %%gs:%1,%0" : "=r" (td)
219 : "m" (*(char *)OFFSETOF_CURTHREAD));
220 return (td);
221}
222#ifdef __clang__
223#pragma clang diagnostic pop
224#endif
225#define curthread (__curthread())
226
227#define OFFSETOF_CURPCB 32
228static __inline __pure2 struct pcb *
229__curpcb(void)
230{
231 struct pcb *pcb;
232
233 __asm("movq %%gs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
234 return (pcb);
235}
236#define curpcb (__curpcb())
237
238#define IS_BSP() (PCPU_GET(cpuid) == 0)
239
240#else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
241
242#error "this file needs to be ported to your compiler"
243
244#endif /* lint, etc. */
245
246#endif /* _KERNEL */
247
248#endif /* !_MACHINE_PCPU_H_ */
2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
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 * $FreeBSD: head/sys/amd64/include/pcpu.h 255331 2013-09-06 22:17:02Z gibbs $
27 */
28
29#ifndef _MACHINE_PCPU_H_
30#define _MACHINE_PCPU_H_
31
32#ifndef _SYS_CDEFS_H_
33#error "sys/cdefs.h is a prerequisite for this file"
34#endif
35
36/*
37 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
38 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
39 * The reason for doing it via a struct is so that an array of pointers
40 * to each CPU's data can be set up for things like "check curproc on all
41 * other processors"
42 */
43#define PCPU_MD_FIELDS \
44 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
45 struct pcpu *pc_prvspace; /* Self-reference */ \
46 struct pmap *pc_curpmap; \
47 struct amd64tss *pc_tssp; /* TSS segment active on CPU */ \
48 struct amd64tss *pc_commontssp;/* Common TSS for the CPU */ \
49 register_t pc_rsp0; \
50 register_t pc_scratch_rsp; /* User %rsp in syscall */ \
51 u_int pc_apic_id; \
52 u_int pc_acpi_id; /* ACPI CPU id */ \
53 /* Pointer to the CPU %fs descriptor */ \
54 struct user_segment_descriptor *pc_fs32p; \
55 /* Pointer to the CPU %gs descriptor */ \
56 struct user_segment_descriptor *pc_gs32p; \
57 /* Pointer to the CPU LDT descriptor */ \
58 struct system_segment_descriptor *pc_ldt; \
59 /* Pointer to the CPU TSS descriptor */ \
60 struct system_segment_descriptor *pc_tss; \
61 uint64_t pc_pm_save_cnt; \
62 u_int pc_cmci_mask; /* MCx banks for CMCI */ \
63 uint64_t pc_dbreg[16]; /* ddb debugging regs */ \
64 int pc_dbreg_cmd; /* ddb debugging reg cmd */ \
65 char __pad[161] /* be divisor of PAGE_SIZE \
66 after cache alignment */
67
68#define PC_DBREG_CMD_NONE 0
69#define PC_DBREG_CMD_LOAD 1
70
71#ifdef _KERNEL
72
73#ifdef lint
74
75extern struct pcpu *pcpup;
76
77#define PCPU_GET(member) (pcpup->pc_ ## member)
78#define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
79#define PCPU_INC(member) PCPU_ADD(member, 1)
80#define PCPU_PTR(member) (&pcpup->pc_ ## member)
81#define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
82
83#elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
84
85/*
86 * Evaluates to the byte offset of the per-cpu variable name.
87 */
88#define __pcpu_offset(name) \
89 __offsetof(struct pcpu, name)
90
91/*
92 * Evaluates to the type of the per-cpu variable name.
93 */
94#define __pcpu_type(name) \
95 __typeof(((struct pcpu *)0)->name)
96
97/*
98 * Evaluates to the address of the per-cpu variable name.
99 */
100#define __PCPU_PTR(name) __extension__ ({ \
101 __pcpu_type(name) *__p; \
102 \
103 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
104 : "=r" (__p) \
105 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
106 "i" (__pcpu_offset(name))); \
107 \
108 __p; \
109})
110
111/*
112 * Evaluates to the value of the per-cpu variable name.
113 */
114#define __PCPU_GET(name) __extension__ ({ \
115 __pcpu_type(name) __res; \
116 struct __s { \
117 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
118 } __s; \
119 \
120 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
121 sizeof(__res) == 4 || sizeof(__res) == 8) { \
122 __asm __volatile("mov %%gs:%1,%0" \
123 : "=r" (__s) \
124 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
125 *(struct __s *)(void *)&__res = __s; \
126 } else { \
127 __res = *__PCPU_PTR(name); \
128 } \
129 __res; \
130})
131
132/*
133 * Adds the value to the per-cpu counter name. The implementation
134 * must be atomic with respect to interrupts.
135 */
136#define __PCPU_ADD(name, val) do { \
137 __pcpu_type(name) __val; \
138 struct __s { \
139 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
140 } __s; \
141 \
142 __val = (val); \
143 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
144 sizeof(__val) == 4 || sizeof(__val) == 8) { \
145 __s = *(struct __s *)(void *)&__val; \
146 __asm __volatile("add %1,%%gs:%0" \
147 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
148 : "r" (__s)); \
149 } else \
150 *__PCPU_PTR(name) += __val; \
151} while (0)
152
153/*
154 * Increments the value of the per-cpu counter name. The implementation
155 * must be atomic with respect to interrupts.
156 */
157#define __PCPU_INC(name) do { \
158 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
159 sizeof(__pcpu_type(name)) == 2 || \
160 sizeof(__pcpu_type(name)) == 4 || \
161 sizeof(__pcpu_type(name)) == 8); \
162 if (sizeof(__pcpu_type(name)) == 1) { \
163 __asm __volatile("incb %%gs:%0" \
164 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
165 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
166 } else if (sizeof(__pcpu_type(name)) == 2) { \
167 __asm __volatile("incw %%gs:%0" \
168 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
169 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
170 } else if (sizeof(__pcpu_type(name)) == 4) { \
171 __asm __volatile("incl %%gs:%0" \
172 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
173 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
174 } else if (sizeof(__pcpu_type(name)) == 8) { \
175 __asm __volatile("incq %%gs:%0" \
176 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
177 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
178 } \
179} while (0)
180
181/*
182 * Sets the value of the per-cpu variable name to value val.
183 */
184#define __PCPU_SET(name, val) { \
185 __pcpu_type(name) __val; \
186 struct __s { \
187 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
188 } __s; \
189 \
190 __val = (val); \
191 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
192 sizeof(__val) == 4 || sizeof(__val) == 8) { \
193 __s = *(struct __s *)(void *)&__val; \
194 __asm __volatile("mov %1,%%gs:%0" \
195 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
196 : "r" (__s)); \
197 } else { \
198 *__PCPU_PTR(name) = __val; \
199 } \
200}
201
202#define PCPU_GET(member) __PCPU_GET(pc_ ## member)
203#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
204#define PCPU_INC(member) __PCPU_INC(pc_ ## member)
205#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
206#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
207
208#define OFFSETOF_CURTHREAD 0
209#ifdef __clang__
210#pragma clang diagnostic push
211#pragma clang diagnostic ignored "-Wnull-dereference"
212#endif
213static __inline __pure2 struct thread *
214__curthread(void)
215{
216 struct thread *td;
217
218 __asm("movq %%gs:%1,%0" : "=r" (td)
219 : "m" (*(char *)OFFSETOF_CURTHREAD));
220 return (td);
221}
222#ifdef __clang__
223#pragma clang diagnostic pop
224#endif
225#define curthread (__curthread())
226
227#define OFFSETOF_CURPCB 32
228static __inline __pure2 struct pcb *
229__curpcb(void)
230{
231 struct pcb *pcb;
232
233 __asm("movq %%gs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
234 return (pcb);
235}
236#define curpcb (__curpcb())
237
238#define IS_BSP() (PCPU_GET(cpuid) == 0)
239
240#else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
241
242#error "this file needs to be ported to your compiler"
243
244#endif /* lint, etc. */
245
246#endif /* _KERNEL */
247
248#endif /* !_MACHINE_PCPU_H_ */