1/*-
2 * Copyright (c) Peter Wemm
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: stable/9/sys/i386/include/pcpu.h 216956 2011-01-04 14:49:54Z rwatson $
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#include <machine/segments.h>
37#include <machine/tss.h>
38
39/*
40 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
41 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
42 * The reason for doing it via a struct is so that an array of pointers
43 * to each CPU's data can be set up for things like "check curproc on all
44 * other processors"
45 */
46
47#if defined(XEN) || defined(XENHVM)
48#ifndef NR_VIRQS
49#define NR_VIRQS 24
50#endif
51#ifndef NR_IPIS
52#define NR_IPIS 2
53#endif
54#endif
55
56#if defined(XEN)
57
58/* These are peridically updated in shared_info, and then copied here. */
59struct shadow_time_info {
60 uint64_t tsc_timestamp; /* TSC at last update of time vals. */
61 uint64_t system_timestamp; /* Time, in nanosecs, since boot. */
62 uint32_t tsc_to_nsec_mul;
63 uint32_t tsc_to_usec_mul;
64 int tsc_shift;
65 uint32_t version;
66};
67
68#define PCPU_XEN_FIELDS \
69 ; \
70 u_int pc_cr3; /* track cr3 for R1/R3*/ \
71 vm_paddr_t *pc_pdir_shadow; \
72 uint64_t pc_processed_system_time; \
73 struct shadow_time_info pc_shadow_time; \
74 int pc_resched_irq; \
75 int pc_callfunc_irq; \
76 int pc_virq_to_irq[NR_VIRQS]; \
77 int pc_ipi_to_irq[NR_IPIS]
78
79#elif defined(XENHVM)
80
81#define PCPU_XEN_FIELDS \
82 ; \
83 unsigned int pc_last_processed_l1i; \
84 unsigned int pc_last_processed_l2i
85
86#else /* !XEN && !XENHVM */
87
88#define PCPU_XEN_FIELDS
89
90#endif
91
92#define PCPU_MD_FIELDS \
93 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
94 struct pcpu *pc_prvspace; /* Self-reference */ \
95 struct pmap *pc_curpmap; \
96 struct i386tss pc_common_tss; \
97 struct segment_descriptor pc_common_tssd; \
98 struct segment_descriptor *pc_tss_gdt; \
99 struct segment_descriptor *pc_fsgs_gdt; \
100 int pc_currentldt; \
101 u_int pc_acpi_id; /* ACPI CPU id */ \
102 u_int pc_apic_id; \
103 int pc_private_tss; /* Flag indicating private tss*/\
104 u_int pc_cmci_mask /* MCx banks for CMCI */ \
105 PCPU_XEN_FIELDS
106
107#ifdef _KERNEL
108
109#ifdef lint
110
111extern struct pcpu *pcpup;
112
113#define PCPU_GET(member) (pcpup->pc_ ## member)
114#define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
115#define PCPU_INC(member) PCPU_ADD(member, 1)
116#define PCPU_PTR(member) (&pcpup->pc_ ## member)
117#define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
118
119#elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
120
121/*
122 * Evaluates to the byte offset of the per-cpu variable name.
123 */
124#define __pcpu_offset(name) \
125 __offsetof(struct pcpu, name)
126
127/*
128 * Evaluates to the type of the per-cpu variable name.
129 */
130#define __pcpu_type(name) \
131 __typeof(((struct pcpu *)0)->name)
132
133/*
134 * Evaluates to the address of the per-cpu variable name.
135 */
136#define __PCPU_PTR(name) __extension__ ({ \
137 __pcpu_type(name) *__p; \
138 \
139 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
140 : "=r" (__p) \
141 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
142 "i" (__pcpu_offset(name))); \
143 \
144 __p; \
145})
146
147/*
148 * Evaluates to the value of the per-cpu variable name.
149 */
150#define __PCPU_GET(name) __extension__ ({ \
151 __pcpu_type(name) __res; \
152 struct __s { \
153 u_char __b[MIN(sizeof(__res), 4)]; \
154 } __s; \
155 \
156 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
157 sizeof(__res) == 4) { \
158 __asm __volatile("mov %%fs:%1,%0" \
159 : "=r" (__s) \
160 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
161 *(struct __s *)(void *)&__res = __s; \
162 } else { \
163 __res = *__PCPU_PTR(name); \
164 } \
165 __res; \
166})
167
168/*
169 * Adds a value of the per-cpu counter name. The implementation
170 * must be atomic with respect to interrupts.
171 */
172#define __PCPU_ADD(name, val) do { \
173 __pcpu_type(name) __val; \
174 struct __s { \
175 u_char __b[MIN(sizeof(__val), 4)]; \
176 } __s; \
177 \
178 __val = (val); \
179 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
180 sizeof(__val) == 4) { \
181 __s = *(struct __s *)(void *)&__val; \
182 __asm __volatile("add %1,%%fs:%0" \
183 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
184 : "r" (__s)); \
185 } else \
186 *__PCPU_PTR(name) += __val; \
187} while (0)
188
189/*
190 * Increments the value of the per-cpu counter name. The implementation
191 * must be atomic with respect to interrupts.
192 */
193#define __PCPU_INC(name) do { \
194 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
195 sizeof(__pcpu_type(name)) == 2 || \
196 sizeof(__pcpu_type(name)) == 4); \
197 if (sizeof(__pcpu_type(name)) == 1) { \
198 __asm __volatile("incb %%fs:%0" \
199 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
200 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
201 } else if (sizeof(__pcpu_type(name)) == 2) { \
202 __asm __volatile("incw %%fs:%0" \
203 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
204 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
205 } else if (sizeof(__pcpu_type(name)) == 4) { \
206 __asm __volatile("incl %%fs:%0" \
207 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
208 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
209 } \
210} while (0)
211
212/*
213 * Sets the value of the per-cpu variable name to value val.
214 */
215#define __PCPU_SET(name, val) do { \
216 __pcpu_type(name) __val; \
217 struct __s { \
218 u_char __b[MIN(sizeof(__val), 4)]; \
219 } __s; \
220 \
221 __val = (val); \
222 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
223 sizeof(__val) == 4) { \
224 __s = *(struct __s *)(void *)&__val; \
225 __asm __volatile("mov %1,%%fs:%0" \
226 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
227 : "r" (__s)); \
228 } else { \
229 *__PCPU_PTR(name) = __val; \
230 } \
231} while (0)
232
233#define PCPU_GET(member) __PCPU_GET(pc_ ## member)
234#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
235#define PCPU_INC(member) __PCPU_INC(pc_ ## member)
236#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
237#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
238
239static __inline __pure2 struct thread *
240__curthread(void)
241{
242 struct thread *td;
243
244 __asm("movl %%fs:0,%0" : "=r" (td));
245 return (td);
246}
247#define curthread (__curthread())
248
249#else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
250
251#error "this file needs to be ported to your compiler"
252
253#endif /* lint, etc. */
254
255#endif /* _KERNEL */
256
257#endif /* !_MACHINE_PCPU_H_ */
2 * Copyright (c) Peter Wemm
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: stable/9/sys/i386/include/pcpu.h 216956 2011-01-04 14:49:54Z rwatson $
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#include <machine/segments.h>
37#include <machine/tss.h>
38
39/*
40 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
41 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
42 * The reason for doing it via a struct is so that an array of pointers
43 * to each CPU's data can be set up for things like "check curproc on all
44 * other processors"
45 */
46
47#if defined(XEN) || defined(XENHVM)
48#ifndef NR_VIRQS
49#define NR_VIRQS 24
50#endif
51#ifndef NR_IPIS
52#define NR_IPIS 2
53#endif
54#endif
55
56#if defined(XEN)
57
58/* These are peridically updated in shared_info, and then copied here. */
59struct shadow_time_info {
60 uint64_t tsc_timestamp; /* TSC at last update of time vals. */
61 uint64_t system_timestamp; /* Time, in nanosecs, since boot. */
62 uint32_t tsc_to_nsec_mul;
63 uint32_t tsc_to_usec_mul;
64 int tsc_shift;
65 uint32_t version;
66};
67
68#define PCPU_XEN_FIELDS \
69 ; \
70 u_int pc_cr3; /* track cr3 for R1/R3*/ \
71 vm_paddr_t *pc_pdir_shadow; \
72 uint64_t pc_processed_system_time; \
73 struct shadow_time_info pc_shadow_time; \
74 int pc_resched_irq; \
75 int pc_callfunc_irq; \
76 int pc_virq_to_irq[NR_VIRQS]; \
77 int pc_ipi_to_irq[NR_IPIS]
78
79#elif defined(XENHVM)
80
81#define PCPU_XEN_FIELDS \
82 ; \
83 unsigned int pc_last_processed_l1i; \
84 unsigned int pc_last_processed_l2i
85
86#else /* !XEN && !XENHVM */
87
88#define PCPU_XEN_FIELDS
89
90#endif
91
92#define PCPU_MD_FIELDS \
93 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
94 struct pcpu *pc_prvspace; /* Self-reference */ \
95 struct pmap *pc_curpmap; \
96 struct i386tss pc_common_tss; \
97 struct segment_descriptor pc_common_tssd; \
98 struct segment_descriptor *pc_tss_gdt; \
99 struct segment_descriptor *pc_fsgs_gdt; \
100 int pc_currentldt; \
101 u_int pc_acpi_id; /* ACPI CPU id */ \
102 u_int pc_apic_id; \
103 int pc_private_tss; /* Flag indicating private tss*/\
104 u_int pc_cmci_mask /* MCx banks for CMCI */ \
105 PCPU_XEN_FIELDS
106
107#ifdef _KERNEL
108
109#ifdef lint
110
111extern struct pcpu *pcpup;
112
113#define PCPU_GET(member) (pcpup->pc_ ## member)
114#define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
115#define PCPU_INC(member) PCPU_ADD(member, 1)
116#define PCPU_PTR(member) (&pcpup->pc_ ## member)
117#define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
118
119#elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
120
121/*
122 * Evaluates to the byte offset of the per-cpu variable name.
123 */
124#define __pcpu_offset(name) \
125 __offsetof(struct pcpu, name)
126
127/*
128 * Evaluates to the type of the per-cpu variable name.
129 */
130#define __pcpu_type(name) \
131 __typeof(((struct pcpu *)0)->name)
132
133/*
134 * Evaluates to the address of the per-cpu variable name.
135 */
136#define __PCPU_PTR(name) __extension__ ({ \
137 __pcpu_type(name) *__p; \
138 \
139 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
140 : "=r" (__p) \
141 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
142 "i" (__pcpu_offset(name))); \
143 \
144 __p; \
145})
146
147/*
148 * Evaluates to the value of the per-cpu variable name.
149 */
150#define __PCPU_GET(name) __extension__ ({ \
151 __pcpu_type(name) __res; \
152 struct __s { \
153 u_char __b[MIN(sizeof(__res), 4)]; \
154 } __s; \
155 \
156 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
157 sizeof(__res) == 4) { \
158 __asm __volatile("mov %%fs:%1,%0" \
159 : "=r" (__s) \
160 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
161 *(struct __s *)(void *)&__res = __s; \
162 } else { \
163 __res = *__PCPU_PTR(name); \
164 } \
165 __res; \
166})
167
168/*
169 * Adds a value of the per-cpu counter name. The implementation
170 * must be atomic with respect to interrupts.
171 */
172#define __PCPU_ADD(name, val) do { \
173 __pcpu_type(name) __val; \
174 struct __s { \
175 u_char __b[MIN(sizeof(__val), 4)]; \
176 } __s; \
177 \
178 __val = (val); \
179 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
180 sizeof(__val) == 4) { \
181 __s = *(struct __s *)(void *)&__val; \
182 __asm __volatile("add %1,%%fs:%0" \
183 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
184 : "r" (__s)); \
185 } else \
186 *__PCPU_PTR(name) += __val; \
187} while (0)
188
189/*
190 * Increments the value of the per-cpu counter name. The implementation
191 * must be atomic with respect to interrupts.
192 */
193#define __PCPU_INC(name) do { \
194 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
195 sizeof(__pcpu_type(name)) == 2 || \
196 sizeof(__pcpu_type(name)) == 4); \
197 if (sizeof(__pcpu_type(name)) == 1) { \
198 __asm __volatile("incb %%fs:%0" \
199 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
200 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
201 } else if (sizeof(__pcpu_type(name)) == 2) { \
202 __asm __volatile("incw %%fs:%0" \
203 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
204 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
205 } else if (sizeof(__pcpu_type(name)) == 4) { \
206 __asm __volatile("incl %%fs:%0" \
207 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
208 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
209 } \
210} while (0)
211
212/*
213 * Sets the value of the per-cpu variable name to value val.
214 */
215#define __PCPU_SET(name, val) do { \
216 __pcpu_type(name) __val; \
217 struct __s { \
218 u_char __b[MIN(sizeof(__val), 4)]; \
219 } __s; \
220 \
221 __val = (val); \
222 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
223 sizeof(__val) == 4) { \
224 __s = *(struct __s *)(void *)&__val; \
225 __asm __volatile("mov %1,%%fs:%0" \
226 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
227 : "r" (__s)); \
228 } else { \
229 *__PCPU_PTR(name) = __val; \
230 } \
231} while (0)
232
233#define PCPU_GET(member) __PCPU_GET(pc_ ## member)
234#define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
235#define PCPU_INC(member) __PCPU_INC(pc_ ## member)
236#define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
237#define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
238
239static __inline __pure2 struct thread *
240__curthread(void)
241{
242 struct thread *td;
243
244 __asm("movl %%fs:0,%0" : "=r" (td));
245 return (td);
246}
247#define curthread (__curthread())
248
249#else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
250
251#error "this file needs to be ported to your compiler"
252
253#endif /* lint, etc. */
254
255#endif /* _KERNEL */
256
257#endif /* !_MACHINE_PCPU_H_ */