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
55 /* These are peridically updated in shared_info, and then copied here. */
56 struct shadow_time_info {
57 uint64_t tsc_timestamp; /* TSC at last update of time vals. */
58 uint64_t system_timestamp; /* Time, in nanosecs, since boot. */
59 uint32_t tsc_to_nsec_mul;
60 uint32_t tsc_to_usec_mul;
66 #define PCPU_MD_FIELDS \
67 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
68 struct pcpu *pc_prvspace; /* Self-reference */ \
69 struct pmap *pc_curpmap; \
70 struct i386tss pc_common_tss; \
71 struct segment_descriptor pc_common_tssd; \
72 struct segment_descriptor *pc_tss_gdt; \
73 struct segment_descriptor *pc_fsgs_gdt; \
74 vm_paddr_t *pc_pdir_shadow; \
76 u_int pc_acpi_id; /* ACPI CPU id */ \
78 int pc_private_tss; /* Flag indicating private tss*/\
79 u_int pc_cr3; /* track cr3 for R1/R3*/ \
82 u_int pc_rendezvous; \
84 uint64_t pc_processed_system_time; \
85 struct shadow_time_info pc_shadow_time; \
87 int pc_callfunc_irq; \
88 int pc_virq_to_irq[NR_VIRQS]; \
89 int pc_ipi_to_irq[NR_IPIS]
94 #define PCPU_MD_FIELDS \
95 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
96 struct pcpu *pc_prvspace; /* Self-reference */ \
97 struct pmap *pc_curpmap; \
98 struct i386tss pc_common_tss; \
99 struct segment_descriptor pc_common_tssd; \
100 struct segment_descriptor *pc_tss_gdt; \
101 struct segment_descriptor *pc_fsgs_gdt; \
103 u_int pc_acpi_id; /* ACPI CPU id */ \
105 int pc_private_tss /* Flag indicating private tss */
113 extern struct pcpu *pcpup;
115 #define PCPU_GET(member) (pcpup->pc_ ## member)
116 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
117 #define PCPU_INC(member) PCPU_ADD(member, 1)
118 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
119 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
121 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
124 * Evaluates to the byte offset of the per-cpu variable name.
126 #define __pcpu_offset(name) \
127 __offsetof(struct pcpu, name)
130 * Evaluates to the type of the per-cpu variable name.
132 #define __pcpu_type(name) \
133 __typeof(((struct pcpu *)0)->name)
136 * Evaluates to the address of the per-cpu variable name.
138 #define __PCPU_PTR(name) __extension__ ({ \
139 __pcpu_type(name) *__p; \
141 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
143 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
144 "i" (__pcpu_offset(name))); \
150 * Evaluates to the value of the per-cpu variable name.
152 #define __PCPU_GET(name) __extension__ ({ \
153 __pcpu_type(name) __res; \
155 u_char __b[MIN(sizeof(__res), 4)]; \
158 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
159 sizeof(__res) == 4) { \
160 __asm __volatile("mov %%fs:%1,%0" \
162 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
163 *(struct __s *)(void *)&__res = __s; \
165 __res = *__PCPU_PTR(name); \
171 * Adds a value of the per-cpu counter name. The implementation
172 * must be atomic with respect to interrupts.
174 #define __PCPU_ADD(name, val) do { \
175 __pcpu_type(name) __val; \
177 u_char __b[MIN(sizeof(__val), 4)]; \
181 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
182 sizeof(__val) == 4) { \
183 __s = *(struct __s *)(void *)&__val; \
184 __asm __volatile("add %1,%%fs:%0" \
185 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
188 *__PCPU_PTR(name) += __val; \
192 * Increments the value of the per-cpu counter name. The implementation
193 * must be atomic with respect to interrupts.
195 #define __PCPU_INC(name) do { \
196 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
197 sizeof(__pcpu_type(name)) == 2 || \
198 sizeof(__pcpu_type(name)) == 4); \
199 if (sizeof(__pcpu_type(name)) == 1) { \
200 __asm __volatile("incb %%fs:%0" \
201 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
202 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
203 } else if (sizeof(__pcpu_type(name)) == 2) { \
204 __asm __volatile("incw %%fs:%0" \
205 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
206 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
207 } else if (sizeof(__pcpu_type(name)) == 4) { \
208 __asm __volatile("incl %%fs:%0" \
209 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
210 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
215 * Sets the value of the per-cpu variable name to value val.
217 #define __PCPU_SET(name, val) do { \
218 __pcpu_type(name) __val; \
220 u_char __b[MIN(sizeof(__val), 4)]; \
224 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
225 sizeof(__val) == 4) { \
226 __s = *(struct __s *)(void *)&__val; \
227 __asm __volatile("mov %1,%%fs:%0" \
228 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
231 *__PCPU_PTR(name) = __val; \
235 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
236 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
237 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
238 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
239 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
241 static __inline struct thread *
246 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
249 #define curthread (__curthread())
251 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
253 #error "this file needs to be ported to your compiler"
255 #endif /* lint, etc. */
259 #endif /* !_MACHINE_PCPU_H_ */