2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) Peter Wemm <peter@netplex.com.au>
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 #define PC_PTI_STACK_SZ 16
44 int idle_state; /* Used by cpu_idle_mwait. */
45 int stop_state; /* Used by cpustop_handler. */
46 char padding[128 - (2 * sizeof(int))];
48 _Static_assert(sizeof(struct monitorbuf) == 128, "2x cache line");
51 * The SMP parts are setup in pmap.c and locore.s for the BSP, and
52 * mp_machdep.c sets up the data for the AP's to "see" when they awake.
53 * The reason for doing it via a struct is so that an array of pointers
54 * to each CPU's data can be set up for things like "check curproc on all
57 #define PCPU_MD_FIELDS \
58 struct monitorbuf pc_monitorbuf __aligned(128); /* cache line */\
59 struct pcpu *pc_prvspace; /* Self-reference */ \
60 struct pmap *pc_curpmap; \
61 struct amd64tss *pc_tssp; /* TSS segment active on CPU */ \
65 uint64_t pc_saved_ucr3; \
67 register_t pc_scratch_rsp; /* User %rsp in syscall */ \
68 register_t pc_scratch_rax; \
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 uint64_t pc_pm_save_cnt; \
80 u_int pc_cmci_mask; /* MCx banks for CMCI */ \
81 uint64_t pc_dbreg[16]; /* ddb debugging regs */ \
82 uint64_t pc_pti_stack[PC_PTI_STACK_SZ]; \
83 register_t pc_pti_rsp0; \
84 int pc_dbreg_cmd; /* ddb debugging reg cmd */ \
85 u_int pc_vcpu_id; /* Xen vCPU ID */ \
86 uint32_t pc_pcid_next; \
87 uint32_t pc_pcid_gen; \
88 uint32_t pc_smp_tlb_done; /* TLB op acknowledgement */ \
89 uint32_t pc_ibpb_set; \
93 uint8_t pc_mds_tmp[64]; \
94 u_int pc_ipi_bitmap; \
95 struct amd64tss pc_common_tss; \
96 struct user_segment_descriptor pc_gdt[NGDT]; \
97 char __pad[2956] /* pad to UMA_PCPU_ALLOC_SIZE */
99 #define PC_DBREG_CMD_NONE 0
100 #define PC_DBREG_CMD_LOAD 1
104 #define MONITOR_STOPSTATE_RUNNING 0
105 #define MONITOR_STOPSTATE_STOPPED 1
107 #if defined(__GNUCLIKE_ASM) && defined(__GNUCLIKE___TYPEOF)
110 * Evaluates to the byte offset of the per-cpu variable name.
112 #define __pcpu_offset(name) \
113 __offsetof(struct pcpu, name)
116 * Evaluates to the type of the per-cpu variable name.
118 #define __pcpu_type(name) \
119 __typeof(((struct pcpu *)0)->name)
122 * Evaluates to the address of the per-cpu variable name.
124 #define __PCPU_PTR(name) __extension__ ({ \
125 __pcpu_type(name) *__p; \
127 __asm __volatile("movq %%gs:%1,%0; addq %2,%0" \
129 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace))), \
130 "i" (__pcpu_offset(name))); \
136 * Evaluates to the value of the per-cpu variable name.
138 #define __PCPU_GET(name) __extension__ ({ \
139 __pcpu_type(name) __res; \
141 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
144 if (sizeof(__res) == 1 || sizeof(__res) == 2 || \
145 sizeof(__res) == 4 || sizeof(__res) == 8) { \
146 __asm __volatile("mov %%gs:%1,%0" \
148 : "m" (*(struct __s *)(__pcpu_offset(name)))); \
149 *(struct __s *)(void *)&__res = __s; \
151 __res = *__PCPU_PTR(name); \
157 * Adds the value to the per-cpu counter name. The implementation
158 * must be atomic with respect to interrupts.
160 #define __PCPU_ADD(name, val) do { \
161 __pcpu_type(name) __val; \
163 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
167 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
168 sizeof(__val) == 4 || sizeof(__val) == 8) { \
169 __s = *(struct __s *)(void *)&__val; \
170 __asm __volatile("add %1,%%gs:%0" \
171 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
174 *__PCPU_PTR(name) += __val; \
178 * Increments the value of the per-cpu counter name. The implementation
179 * must be atomic with respect to interrupts.
181 #define __PCPU_INC(name) do { \
182 CTASSERT(sizeof(__pcpu_type(name)) == 1 || \
183 sizeof(__pcpu_type(name)) == 2 || \
184 sizeof(__pcpu_type(name)) == 4 || \
185 sizeof(__pcpu_type(name)) == 8); \
186 if (sizeof(__pcpu_type(name)) == 1) { \
187 __asm __volatile("incb %%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)) == 2) { \
191 __asm __volatile("incw %%gs:%0" \
192 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
193 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
194 } else if (sizeof(__pcpu_type(name)) == 4) { \
195 __asm __volatile("incl %%gs:%0" \
196 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
197 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
198 } else if (sizeof(__pcpu_type(name)) == 8) { \
199 __asm __volatile("incq %%gs:%0" \
200 : "=m" (*(__pcpu_type(name) *)(__pcpu_offset(name)))\
201 : "m" (*(__pcpu_type(name) *)(__pcpu_offset(name))));\
206 * Sets the value of the per-cpu variable name to value val.
208 #define __PCPU_SET(name, val) { \
209 __pcpu_type(name) __val; \
211 u_char __b[MIN(sizeof(__pcpu_type(name)), 8)]; \
215 if (sizeof(__val) == 1 || sizeof(__val) == 2 || \
216 sizeof(__val) == 4 || sizeof(__val) == 8) { \
217 __s = *(struct __s *)(void *)&__val; \
218 __asm __volatile("mov %1,%%gs:%0" \
219 : "=m" (*(struct __s *)(__pcpu_offset(name))) \
222 *__PCPU_PTR(name) = __val; \
226 #define get_pcpu() __extension__ ({ \
229 __asm __volatile("movq %%gs:%1,%0" \
231 : "m" (*(struct pcpu *)(__pcpu_offset(pc_prvspace)))); \
235 #define PCPU_GET(member) __PCPU_GET(pc_ ## member)
236 #define PCPU_ADD(member, val) __PCPU_ADD(pc_ ## member, val)
237 #define PCPU_INC(member) __PCPU_INC(pc_ ## member)
238 #define PCPU_PTR(member) __PCPU_PTR(pc_ ## member)
239 #define PCPU_SET(member, val) __PCPU_SET(pc_ ## member, val)
241 #define IS_BSP() (PCPU_GET(cpuid) == 0)
243 #define zpcpu_offset_cpu(cpu) ((uintptr_t)&__pcpu[0] + UMA_PCPU_ALLOC_SIZE * cpu)
244 #define zpcpu_base_to_offset(base) (void *)((uintptr_t)(base) - (uintptr_t)&__pcpu[0])
245 #define zpcpu_offset_to_base(base) (void *)((uintptr_t)(base) + (uintptr_t)&__pcpu[0])
247 #define zpcpu_sub_protected(base, n) do { \
248 ZPCPU_ASSERT_PROTECTED(); \
249 zpcpu_sub(base, n); \
252 #define zpcpu_set_protected(base, n) do { \
253 __typeof(*base) __n = (n); \
254 ZPCPU_ASSERT_PROTECTED(); \
255 switch (sizeof(*base)) { \
257 __asm __volatile("movl\t%1,%%gs:(%0)" \
258 : : "r" (base), "ri" (__n) : "memory", "cc"); \
261 __asm __volatile("movq\t%1,%%gs:(%0)" \
262 : : "r" (base), "ri" (__n) : "memory", "cc"); \
265 *zpcpu_get(base) = __n; \
269 #define zpcpu_add(base, n) do { \
270 __typeof(*base) __n = (n); \
271 CTASSERT(sizeof(*base) == 4 || sizeof(*base) == 8); \
272 switch (sizeof(*base)) { \
274 __asm __volatile("addl\t%1,%%gs:(%0)" \
275 : : "r" (base), "ri" (__n) : "memory", "cc"); \
278 __asm __volatile("addq\t%1,%%gs:(%0)" \
279 : : "r" (base), "ri" (__n) : "memory", "cc"); \
284 #define zpcpu_add_protected(base, n) do { \
285 ZPCPU_ASSERT_PROTECTED(); \
286 zpcpu_add(base, n); \
289 #define zpcpu_sub(base, n) do { \
290 __typeof(*base) __n = (n); \
291 CTASSERT(sizeof(*base) == 4 || sizeof(*base) == 8); \
292 switch (sizeof(*base)) { \
294 __asm __volatile("subl\t%1,%%gs:(%0)" \
295 : : "r" (base), "ri" (__n) : "memory", "cc"); \
298 __asm __volatile("subq\t%1,%%gs:(%0)" \
299 : : "r" (base), "ri" (__n) : "memory", "cc"); \
304 #else /* !__GNUCLIKE_ASM || !__GNUCLIKE___TYPEOF */
306 #error "this file needs to be ported to your compiler"
308 #endif /* __GNUCLIKE_ASM && __GNUCLIKE___TYPEOF */
312 #endif /* !_MACHINE_PCPU_H_ */