2 * Copyright (c) Peter Wemm
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 #ifndef _MACHINE_PCPU_H_
30 #define _MACHINE_PCPU_H_
33 #error "sys/cdefs.h is a prerequisite for this file"
36 #include <machine/segments.h>
37 #include <machine/tss.h>
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
49 /* These are peridically updated in shared_info, and then copied here. */
50 struct shadow_time_info {
51 uint64_t tsc_timestamp; /* TSC at last update of time vals. */
52 uint64_t system_timestamp; /* Time, in nanosecs, since boot. */
53 uint32_t tsc_to_nsec_mul;
54 uint32_t tsc_to_usec_mul;
59 #define PCPU_XEN_FIELDS \
61 u_int pc_cr3; /* track cr3 for R1/R3*/ \
62 vm_paddr_t *pc_pdir_shadow; \
63 uint64_t pc_processed_system_time; \
64 struct shadow_time_info pc_shadow_time; \
69 #define PCPU_XEN_FIELDS \
75 #define PCPU_MD_FIELDS \
76 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
77 struct pcpu *pc_prvspace; /* Self-reference */ \
78 struct pmap *pc_curpmap; \
79 struct i386tss pc_common_tss; \
80 struct segment_descriptor pc_common_tssd; \
81 struct segment_descriptor *pc_tss_gdt; \
82 struct segment_descriptor *pc_fsgs_gdt; \
84 u_int pc_acpi_id; /* ACPI CPU id */ \
86 int pc_private_tss; /* Flag indicating private tss*/\
87 u_int pc_cmci_mask; /* MCx banks for CMCI */ \
88 u_int pc_vcpu_id /* Xen vCPU ID */ \
95 extern struct pcpu *pcpup;
97 #define PCPU_GET(member) (pcpup->pc_ ## member)
98 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
99 #define PCPU_INC(member) PCPU_ADD(member, 1)
100 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
101 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
103 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
106 * Evaluates to the byte offset of the per-cpu variable name.
108 #define __pcpu_offset(name) \
109 __offsetof(struct pcpu, name)
112 * Evaluates to the type of the per-cpu variable name.
114 #define __pcpu_type(name) \
115 __typeof(((struct pcpu *)0)->name)
118 * Evaluates to the address of the per-cpu variable name.
120 #define __PCPU_PTR(name) __extension__ ({ \
121 __pcpu_type(name) *__p; \
123 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
125 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
126 "i" (__pcpu_offset(name))); \
132 * Evaluates to the value of the per-cpu variable name.
134 #define __PCPU_GET(name) __extension__ ({ \
135 __pcpu_type(name) __res; \
137 u_char __b[MIN(sizeof(__res), 4)]; \
140 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
141 sizeof(__res) == 4) { \
142 __asm __volatile("mov %%fs:%1,%0" \
144 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
145 *(struct __s *)(void *)&__res = __s; \
147 __res = *__PCPU_PTR(name); \
153 * Adds a value of the per-cpu counter name. The implementation
154 * must be atomic with respect to interrupts.
156 #define __PCPU_ADD(name, val) do { \
157 __pcpu_type(name) __val; \
159 u_char __b[MIN(sizeof(__val), 4)]; \
163 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
164 sizeof(__val) == 4) { \
165 __s = *(struct __s *)(void *)&__val; \
166 __asm __volatile("add %1,%%fs:%0" \
167 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
170 *__PCPU_PTR(name) += __val; \
174 * Increments the value of the per-cpu counter name. The implementation
175 * must be atomic with respect to interrupts.
177 #define __PCPU_INC(name) do { \
178 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
179 sizeof(__pcpu_type(name)) == 2 || \
180 sizeof(__pcpu_type(name)) == 4); \
181 if (sizeof(__pcpu_type(name)) == 1) { \
182 __asm __volatile("incb %%fs:%0" \
183 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
184 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
185 } else if (sizeof(__pcpu_type(name)) == 2) { \
186 __asm __volatile("incw %%fs:%0" \
187 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
188 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
189 } else if (sizeof(__pcpu_type(name)) == 4) { \
190 __asm __volatile("incl %%fs:%0" \
191 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
192 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
197 * Sets the value of the per-cpu variable name to value val.
199 #define __PCPU_SET(name, val) do { \
200 __pcpu_type(name) __val; \
202 u_char __b[MIN(sizeof(__val), 4)]; \
206 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
207 sizeof(__val) == 4) { \
208 __s = *(struct __s *)(void *)&__val; \
209 __asm __volatile("mov %1,%%fs:%0" \
210 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
213 *__PCPU_PTR(name) = __val; \
217 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
218 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
219 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
220 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
221 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
223 #define OFFSETOF_CURTHREAD 0
225 #pragma clang diagnostic push
226 #pragma clang diagnostic ignored "-Wnull-dereference"
228 static __inline __pure2 struct thread *
233 __asm("movl %%fs:%1,%0" : "=r" (td)
234 : "m" (*(char *)OFFSETOF_CURTHREAD));
238 #pragma clang diagnostic pop
240 #define curthread (__curthread())
242 #define OFFSETOF_CURPCB 16
243 static __inline __pure2 struct pcb *
248 __asm("movl %%fs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
251 #define curpcb (__curpcb())
253 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
255 #error "this file needs to be ported to your compiler"
257 #endif /* lint, etc. */
261 #endif /* !_MACHINE_PCPU_H_ */