2 * Copyright (c) Peter Wemm <peter@netplex.com.au>
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 #if defined(XEN) || defined(XENHVM)
46 #define PCPU_XEN_FIELDS \
48 unsigned int pc_last_processed_l1i; \
49 unsigned int pc_last_processed_l2i
51 #define PCPU_XEN_FIELDS
55 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
56 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
57 * The reason for doing it via a struct is so that an array of pointers
58 * to each CPU's data can be set up for things like "check curproc on all
61 #define PCPU_MD_FIELDS \
62 char pc_monitorbuf[128] __aligned(128); /* cache line */ \
63 struct pcpu *pc_prvspace; /* Self-reference */ \
64 struct pmap *pc_curpmap; \
65 struct amd64tss *pc_tssp; /* TSS segment active on CPU */ \
66 struct amd64tss *pc_commontssp;/* Common TSS for the CPU */ \
68 register_t pc_scratch_rsp; /* User %rsp in syscall */ \
70 u_int pc_acpi_id; /* ACPI CPU id */ \
71 /* Pointer to the CPU %fs descriptor */ \
72 struct user_segment_descriptor *pc_fs32p; \
73 /* Pointer to the CPU %gs descriptor */ \
74 struct user_segment_descriptor *pc_gs32p; \
75 /* Pointer to the CPU LDT descriptor */ \
76 struct system_segment_descriptor *pc_ldt; \
77 /* Pointer to the CPU TSS descriptor */ \
78 struct system_segment_descriptor *pc_tss; \
79 u_int pc_cmci_mask /* MCx banks for CMCI */ \
86 extern struct pcpu *pcpup;
88 #define PCPU_GET(member) (pcpup->pc_ ## member)
89 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
90 #define PCPU_INC(member) PCPU_ADD(member, 1)
91 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
92 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
94 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
97 * Evaluates to the byte offset of the per-cpu variable name.
99 #define __pcpu_offset(name) \
100 __offsetof(struct pcpu, name)
103 * Evaluates to the type of the per-cpu variable name.
105 #define __pcpu_type(name) \
106 __typeof(((struct pcpu *)0)->name)
109 * Evaluates to the address of the per-cpu variable name.
111 #define __PCPU_PTR(name) __extension__ ({ \
112 __pcpu_type(name) *__p; \
114 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
116 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
117 "i" (__pcpu_offset(name))); \
123 * Evaluates to the value of the per-cpu variable name.
125 #define __PCPU_GET(name) __extension__ ({ \
126 __pcpu_type(name) __res; \
128 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
131 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
132 sizeof(__res) == 4 || sizeof(__res) == 8) { \
133 __asm __volatile("mov %%gs:%1,%0" \
135 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
136 *(struct __s *)(void *)&__res = __s; \
138 __res = *__PCPU_PTR(name); \
144 * Adds the value to the per-cpu counter name. The implementation
145 * must be atomic with respect to interrupts.
147 #define __PCPU_ADD(name, val) do { \
148 __pcpu_type(name) __val; \
150 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
154 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
155 sizeof(__val) == 4 || sizeof(__val) == 8) { \
156 __s = *(struct __s *)(void *)&__val; \
157 __asm __volatile("add %1,%%gs:%0" \
158 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
161 *__PCPU_PTR(name) += __val; \
165 * Increments the value of the per-cpu counter name. The implementation
166 * must be atomic with respect to interrupts.
168 #define __PCPU_INC(name) do { \
169 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
170 sizeof(__pcpu_type(name)) == 2 || \
171 sizeof(__pcpu_type(name)) == 4 || \
172 sizeof(__pcpu_type(name)) == 8); \
173 if (sizeof(__pcpu_type(name)) == 1) { \
174 __asm __volatile("incb %%gs:%0" \
175 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
176 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
177 } else if (sizeof(__pcpu_type(name)) == 2) { \
178 __asm __volatile("incw %%gs:%0" \
179 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
180 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
181 } else if (sizeof(__pcpu_type(name)) == 4) { \
182 __asm __volatile("incl %%gs:%0" \
183 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
184 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
185 } else if (sizeof(__pcpu_type(name)) == 8) { \
186 __asm __volatile("incq %%gs:%0" \
187 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
188 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
193 * Sets the value of the per-cpu variable name to value val.
195 #define __PCPU_SET(name, val) { \
196 __pcpu_type(name) __val; \
198 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
202 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
203 sizeof(__val) == 4 || sizeof(__val) == 8) { \
204 __s = *(struct __s *)(void *)&__val; \
205 __asm __volatile("mov %1,%%gs:%0" \
206 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
209 *__PCPU_PTR(name) = __val; \
213 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
214 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
215 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
216 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
217 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
219 static __inline __pure2 struct thread *
224 __asm("movq %%gs:0,%0" : "=r" (td));
227 #define curthread (__curthread())
229 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
231 #error "this file needs to be ported to your compiler"
233 #endif /* lint, etc. */
237 #endif /* !_MACHINE_PCPU_H_ */