2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) Peter Wemm
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #ifndef _MACHINE_PCPU_H_
32 #define _MACHINE_PCPU_H_
35 #error "sys/cdefs.h is a prerequisite for this file"
38 #include <machine/segments.h>
39 #include <machine/tss.h>
41 #include <sys/_lock.h>
42 #include <sys/_mutex.h>
45 int idle_state; /* Used by cpu_idle_mwait. */
46 int stop_state; /* Used by cpustop_handler. */
47 char padding[128 - (2 * sizeof(int))];
49 _Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line");
52 * The SMP parts are setup in pmap.c and machdep.c for the BSP, and
53 * pmap.c and mp_machdep.c sets up the data for the AP's to "see" when
54 * they awake. The reason for doing it via a struct is so that an
55 * array of pointers to each CPU's data can be set up for things like
56 * "check curproc on all other processors"
59 #define PCPU_MD_FIELDS \
60 struct monitorbuf pc_monitorbuf __aligned(128); /* cache line */\
61 struct pcpu *pc_prvspace; /* Self-reference */ \
62 struct pmap *pc_curpmap; \
63 struct segment_descriptor pc_common_tssd; \
64 struct segment_descriptor *pc_tss_gdt; \
65 struct segment_descriptor *pc_fsgs_gdt; \
66 struct i386tss *pc_common_tssp; \
70 u_int pc_acpi_id; /* ACPI CPU id */ \
72 int pc_private_tss; /* Flag indicating private tss*/\
73 u_int pc_cmci_mask; /* MCx banks for CMCI */ \
74 u_int pc_vcpu_id; /* Xen vCPU ID */ \
75 struct mtx pc_cmap_lock; \
78 caddr_t pc_cmap_addr1; \
79 caddr_t pc_cmap_addr2; \
80 vm_offset_t pc_qmap_addr; /* KVA for temporary mappings */\
81 vm_offset_t pc_copyout_maddr; \
82 vm_offset_t pc_copyout_saddr; \
83 struct mtx pc_copyout_mlock; \
84 struct sx pc_copyout_slock; \
85 char *pc_copyout_buf; \
86 vm_offset_t pc_pmap_eh_va; \
87 caddr_t pc_pmap_eh_ptep; \
88 uint32_t pc_smp_tlb_done; /* TLB op acknowledgement */ \
89 uint32_t pc_ibpb_set; \
90 u_int pc_ipi_bitmap; \
95 #define MONITOR_STOPSTATE_RUNNING 0
96 #define MONITOR_STOPSTATE_STOPPED 1
98 #if defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
101 * Evaluates to the byte offset of the per-cpu variable name.
103 #define __pcpu_offset(name) \
104 __offsetof(struct pcpu, name)
107 * Evaluates to the type of the per-cpu variable name.
109 #define __pcpu_type(name) \
110 __typeof(((struct pcpu *)0)->name)
113 * Evaluates to the address of the per-cpu variable name.
115 #define __PCPU_PTR(name) __extension__ ({ \
116 __pcpu_type(name) *__p; \
118 __asm __volatile("movl %%fs:%1,%0; addl %2,%0" \
120 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
121 "i" (__pcpu_offset(name))); \
127 * Evaluates to the value of the per-cpu variable name.
129 #define __PCPU_GET(name) __extension__ ({ \
130 __pcpu_type(name) __res; \
132 u_char __b[MIN(sizeof(__res), 4)]; \
135 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
136 sizeof(__res) == 4) { \
137 __asm __volatile("mov %%fs:%1,%0" \
139 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
140 *(struct __s *)(void *)&__res = __s; \
142 __res = *__PCPU_PTR(name); \
148 * Adds a value of the per-cpu counter name. The implementation
149 * must be atomic with respect to interrupts.
151 #define __PCPU_ADD(name, val) do { \
152 __pcpu_type(name) __val; \
154 u_char __b[MIN(sizeof(__val), 4)]; \
158 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
159 sizeof(__val) == 4) { \
160 __s = *(struct __s *)(void *)&__val; \
161 __asm __volatile("add %1,%%fs:%0" \
162 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
165 *__PCPU_PTR(name) += __val; \
169 * Increments the value of the per-cpu counter name. The implementation
170 * must be atomic with respect to interrupts.
172 #define __PCPU_INC(name) do { \
173 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
174 sizeof(__pcpu_type(name)) == 2 || \
175 sizeof(__pcpu_type(name)) == 4); \
176 if (sizeof(__pcpu_type(name)) == 1) { \
177 __asm __volatile("incb %%fs:%0" \
178 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
179 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
180 } else if (sizeof(__pcpu_type(name)) == 2) { \
181 __asm __volatile("incw %%fs:%0" \
182 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
183 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
184 } else if (sizeof(__pcpu_type(name)) == 4) { \
185 __asm __volatile("incl %%fs:%0" \
186 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
187 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
192 * Sets the value of the per-cpu variable name to value val.
194 #define __PCPU_SET(name, val) do { \
195 __pcpu_type(name) __val; \
197 u_char __b[MIN(sizeof(__val), 4)]; \
201 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
202 sizeof(__val) == 4) { \
203 __s = *(struct __s *)(void *)&__val; \
204 __asm __volatile("mov %1,%%fs:%0" \
205 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
208 *__PCPU_PTR(name) = __val; \
212 #define get_pcpu() __extension__ ({ \
215 __asm __volatile("movl %%fs:%1,%0" \
217 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace)))); \
221 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
222 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
223 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
224 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
225 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
227 #define OFFSETOF_CURTHREAD 0
229 #pragma clang diagnostic push
230 #pragma clang diagnostic ignored "-Wnull-dereference"
232 static __inline __pure2 struct thread *
237 __asm("movl %%fs:%1,%0" : "=r" (td)
238 : "m" (*(char *)OFFSETOF_CURTHREAD));
242 #pragma clang diagnostic pop
244 #define curthread (__curthread())
246 #define OFFSETOF_CURPCB 16
247 static __inline __pure2 struct pcb *
252 __asm("movl %%fs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
255 #define curpcb (__curpcb())
257 #define IS_BSP() (PCPU_GET(cpuid) == 0)
259 #else /* defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
261 #error "this file needs to be ported to your compiler"
263 #endif /* __GNUCLIKE_ASM etc. */
267 #endif /* !_MACHINE_PCPU_H_ */