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"
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
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 */ \
50 register_t pc_scratch_rsp; /* User %rsp in syscall */ \
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 u_int pc_vcpu_id; /* Xen vCPU ID */ \
66 char __pad[157] /* be divisor of PAGE_SIZE \
67 after cache alignment */
69 #define PC_DBREG_CMD_NONE 0
70 #define PC_DBREG_CMD_LOAD 1
76 extern struct pcpu *pcpup;
78 #define PCPU_GET(member) (pcpup->pc_ ## member)
79 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
80 #define PCPU_INC(member) PCPU_ADD(member, 1)
81 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
82 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
84 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
87 * Evaluates to the byte offset of the per-cpu variable name.
89 #define __pcpu_offset(name) \
90 __offsetof(struct pcpu, name)
93 * Evaluates to the type of the per-cpu variable name.
95 #define __pcpu_type(name) \
96 __typeof(((struct pcpu *)0)->name)
99 * Evaluates to the address of the per-cpu variable name.
101 #define __PCPU_PTR(name) __extension__ ({ \
102 __pcpu_type(name) *__p; \
104 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
106 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
107 "i" (__pcpu_offset(name))); \
113 * Evaluates to the value of the per-cpu variable name.
115 #define __PCPU_GET(name) __extension__ ({ \
116 __pcpu_type(name) __res; \
118 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
121 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
122 sizeof(__res) == 4 || sizeof(__res) == 8) { \
123 __asm __volatile("mov %%gs:%1,%0" \
125 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
126 *(struct __s *)(void *)&__res = __s; \
128 __res = *__PCPU_PTR(name); \
134 * Adds the value to the per-cpu counter name. The implementation
135 * must be atomic with respect to interrupts.
137 #define __PCPU_ADD(name, val) do { \
138 __pcpu_type(name) __val; \
140 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
144 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
145 sizeof(__val) == 4 || sizeof(__val) == 8) { \
146 __s = *(struct __s *)(void *)&__val; \
147 __asm __volatile("add %1,%%gs:%0" \
148 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
151 *__PCPU_PTR(name) += __val; \
155 * Increments the value of the per-cpu counter name. The implementation
156 * must be atomic with respect to interrupts.
158 #define __PCPU_INC(name) do { \
159 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
160 sizeof(__pcpu_type(name)) == 2 || \
161 sizeof(__pcpu_type(name)) == 4 || \
162 sizeof(__pcpu_type(name)) == 8); \
163 if (sizeof(__pcpu_type(name)) == 1) { \
164 __asm __volatile("incb %%gs:%0" \
165 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
166 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
167 } else if (sizeof(__pcpu_type(name)) == 2) { \
168 __asm __volatile("incw %%gs:%0" \
169 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
170 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
171 } else if (sizeof(__pcpu_type(name)) == 4) { \
172 __asm __volatile("incl %%gs:%0" \
173 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
174 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
175 } else if (sizeof(__pcpu_type(name)) == 8) { \
176 __asm __volatile("incq %%gs:%0" \
177 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
178 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
183 * Sets the value of the per-cpu variable name to value val.
185 #define __PCPU_SET(name, val) { \
186 __pcpu_type(name) __val; \
188 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
192 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
193 sizeof(__val) == 4 || sizeof(__val) == 8) { \
194 __s = *(struct __s *)(void *)&__val; \
195 __asm __volatile("mov %1,%%gs:%0" \
196 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
199 *__PCPU_PTR(name) = __val; \
203 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
204 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
205 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
206 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
207 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
209 #define OFFSETOF_CURTHREAD 0
211 #pragma clang diagnostic push
212 #pragma clang diagnostic ignored "-Wnull-dereference"
214 static __inline __pure2 struct thread *
219 __asm("movq %%gs:%1,%0" : "=r" (td)
220 : "m" (*(char *)OFFSETOF_CURTHREAD));
224 #pragma clang diagnostic pop
226 #define curthread (__curthread())
228 #define OFFSETOF_CURPCB 32
229 static __inline __pure2 struct pcb *
234 __asm("movq %%gs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
237 #define curpcb (__curpcb())
239 #define IS_BSP() (PCPU_GET(cpuid) == 0)
241 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
243 #error "this file needs to be ported to your compiler"
245 #endif /* lint, etc. */
249 #endif /* !_MACHINE_PCPU_H_ */