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 uint32_t pc_pcid_next; \
67 uint32_t pc_pcid_gen; \
68 uint32_t pc_smp_tlb_done; /* TLB op acknowledgement */ \
69 char __pad[145] /* be divisor of PAGE_SIZE \
70 after cache alignment */
72 #define PC_DBREG_CMD_NONE 0
73 #define PC_DBREG_CMD_LOAD 1
79 extern struct pcpu *pcpup;
81 #define PCPU_GET(member) (pcpup->pc_ ## member)
82 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
83 #define PCPU_INC(member) PCPU_ADD(member, 1)
84 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
85 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
87 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
90 * Evaluates to the byte offset of the per-cpu variable name.
92 #define __pcpu_offset(name) \
93 __offsetof(struct pcpu, name)
96 * Evaluates to the type of the per-cpu variable name.
98 #define __pcpu_type(name) \
99 __typeof(((struct pcpu *)0)->name)
102 * Evaluates to the address of the per-cpu variable name.
104 #define __PCPU_PTR(name) __extension__ ({ \
105 __pcpu_type(name) *__p; \
107 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
109 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
110 "i" (__pcpu_offset(name))); \
116 * Evaluates to the value of the per-cpu variable name.
118 #define __PCPU_GET(name) __extension__ ({ \
119 __pcpu_type(name) __res; \
121 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
124 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
125 sizeof(__res) == 4 || sizeof(__res) == 8) { \
126 __asm __volatile("mov %%gs:%1,%0" \
128 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
129 *(struct __s *)(void *)&__res = __s; \
131 __res = *__PCPU_PTR(name); \
137 * Adds the value to the per-cpu counter name. The implementation
138 * must be atomic with respect to interrupts.
140 #define __PCPU_ADD(name, val) do { \
141 __pcpu_type(name) __val; \
143 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
147 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
148 sizeof(__val) == 4 || sizeof(__val) == 8) { \
149 __s = *(struct __s *)(void *)&__val; \
150 __asm __volatile("add %1,%%gs:%0" \
151 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
154 *__PCPU_PTR(name) += __val; \
158 * Increments the value of the per-cpu counter name. The implementation
159 * must be atomic with respect to interrupts.
161 #define __PCPU_INC(name) do { \
162 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
163 sizeof(__pcpu_type(name)) == 2 || \
164 sizeof(__pcpu_type(name)) == 4 || \
165 sizeof(__pcpu_type(name)) == 8); \
166 if (sizeof(__pcpu_type(name)) == 1) { \
167 __asm __volatile("incb %%gs:%0" \
168 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
169 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
170 } else if (sizeof(__pcpu_type(name)) == 2) { \
171 __asm __volatile("incw %%gs:%0" \
172 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
173 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
174 } else if (sizeof(__pcpu_type(name)) == 4) { \
175 __asm __volatile("incl %%gs:%0" \
176 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
177 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
178 } else if (sizeof(__pcpu_type(name)) == 8) { \
179 __asm __volatile("incq %%gs:%0" \
180 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
181 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
186 * Sets the value of the per-cpu variable name to value val.
188 #define __PCPU_SET(name, val) { \
189 __pcpu_type(name) __val; \
191 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
195 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
196 sizeof(__val) == 4 || sizeof(__val) == 8) { \
197 __s = *(struct __s *)(void *)&__val; \
198 __asm __volatile("mov %1,%%gs:%0" \
199 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
202 *__PCPU_PTR(name) = __val; \
206 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
207 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
208 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
209 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
210 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
212 #define OFFSETOF_CURTHREAD 0
214 #pragma clang diagnostic push
215 #pragma clang diagnostic ignored "-Wnull-dereference"
217 static __inline __pure2 struct thread *
222 __asm("movq %%gs:%1,%0" : "=r" (td)
223 : "m" (*(char *)OFFSETOF_CURTHREAD));
227 #pragma clang diagnostic pop
229 #define curthread (__curthread())
231 #define OFFSETOF_CURPCB 32
232 static __inline __pure2 struct pcb *
237 __asm("movq %%gs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
240 #define curpcb (__curpcb())
242 #define IS_BSP() (PCPU_GET(cpuid) == 0)
244 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
246 #error "this file needs to be ported to your compiler"
248 #endif /* lint, etc. */
252 #endif /* !_MACHINE_PCPU_H_ */