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 */ \
81 uint64_t pc_dbreg[16]; /* ddb debugging regs */ \
82 int pc_dbreg_cmd; /* ddb debugging reg cmd */ \
84 #define PC_DBREG_CMD_NONE 0
85 #define PC_DBREG_CMD_LOAD 1
91 extern struct pcpu *pcpup;
93 #define PCPU_GET(member) (pcpup->pc_ ## member)
94 #define PCPU_ADD(member, val) (pcpup->pc_ ## member += (val))
95 #define PCPU_INC(member) PCPU_ADD(member, 1)
96 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
97 #define PCPU_SET(member, val) (pcpup->pc_ ## member = (val))
99 #elif defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
102 * Evaluates to the byte offset of the per-cpu variable name.
104 #define __pcpu_offset(name) \
105 __offsetof(struct pcpu, name)
108 * Evaluates to the type of the per-cpu variable name.
110 #define __pcpu_type(name) \
111 __typeof(((struct pcpu *)0)->name)
114 * Evaluates to the address of the per-cpu variable name.
116 #define __PCPU_PTR(name) __extension__ ({ \
117 __pcpu_type(name) *__p; \
119 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
121 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
122 "i" (__pcpu_offset(name))); \
128 * Evaluates to the value of the per-cpu variable name.
130 #define __PCPU_GET(name) __extension__ ({ \
131 __pcpu_type(name) __res; \
133 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
136 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
137 sizeof(__res) == 4 || sizeof(__res) == 8) { \
138 __asm __volatile("mov %%gs:%1,%0" \
140 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
141 *(struct __s *)(void *)&__res = __s; \
143 __res = *__PCPU_PTR(name); \
149 * Adds the value to the per-cpu counter name. The implementation
150 * must be atomic with respect to interrupts.
152 #define __PCPU_ADD(name, val) do { \
153 __pcpu_type(name) __val; \
155 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
159 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
160 sizeof(__val) == 4 || sizeof(__val) == 8) { \
161 __s = *(struct __s *)(void *)&__val; \
162 __asm __volatile("add %1,%%gs:%0" \
163 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
166 *__PCPU_PTR(name) += __val; \
170 * Increments the value of the per-cpu counter name. The implementation
171 * must be atomic with respect to interrupts.
173 #define __PCPU_INC(name) do { \
174 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
175 sizeof(__pcpu_type(name)) == 2 || \
176 sizeof(__pcpu_type(name)) == 4 || \
177 sizeof(__pcpu_type(name)) == 8); \
178 if (sizeof(__pcpu_type(name)) == 1) { \
179 __asm __volatile("incb %%gs:%0" \
180 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
181 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
182 } else if (sizeof(__pcpu_type(name)) == 2) { \
183 __asm __volatile("incw %%gs:%0" \
184 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
185 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
186 } else if (sizeof(__pcpu_type(name)) == 4) { \
187 __asm __volatile("incl %%gs:%0" \
188 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
189 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
190 } else if (sizeof(__pcpu_type(name)) == 8) { \
191 __asm __volatile("incq %%gs:%0" \
192 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
193 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
198 * Sets the value of the per-cpu variable name to value val.
200 #define __PCPU_SET(name, val) { \
201 __pcpu_type(name) __val; \
203 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
207 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
208 sizeof(__val) == 4 || sizeof(__val) == 8) { \
209 __s = *(struct __s *)(void *)&__val; \
210 __asm __volatile("mov %1,%%gs:%0" \
211 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
214 *__PCPU_PTR(name) = __val; \
218 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
219 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
220 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
221 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
222 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
224 #define OFFSETOF_CURTHREAD 0
226 #pragma clang diagnostic push
227 #pragma clang diagnostic ignored "-Wnull-dereference"
229 static __inline __pure2 struct thread *
234 __asm("movq %%gs:%1,%0" : "=r" (td)
235 : "m" (*(char *)OFFSETOF_CURTHREAD));
239 #pragma clang diagnostic pop
241 #define curthread (__curthread())
243 #define OFFSETOF_CURPCB 32
244 static __inline __pure2 struct pcb *
249 __asm("movq %%gs:%1,%0" : "=r" (pcb) : "m" (*(char *)OFFSETOF_CURPCB));
252 #define curpcb (__curpcb())
254 #define IS_BSP() (PCPU_GET(cpuid) == 0)
256 #else /* !lint || defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF) */
258 #error "this file needs to be ported to your compiler"
260 #endif /* lint, etc. */
264 #endif /* !_MACHINE_PCPU_H_ */