2 * Copyright (c) 2001 Wind River Systems, Inc.
4 * Written by: John Baldwin <jhb@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. Neither the name of the author nor the names of any co-contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #error "no assembler-serviceable parts inside"
40 #include <sys/_cpuset.h>
41 #include <sys/_lock.h>
42 #include <sys/_mutex.h>
44 #include <sys/queue.h>
45 #include <sys/_rmlock.h>
46 #include <sys/resource.h>
47 #include <machine/pcpu.h>
49 #define DPCPU_SETNAME "set_pcpu"
50 #define DPCPU_SYMPREFIX "pcpu_entry_"
55 * Define a set for pcpu data.
57 extern uintptr_t *__start_set_pcpu;
58 __GLOBL(__start_set_pcpu);
59 extern uintptr_t *__stop_set_pcpu;
60 __GLOBL(__stop_set_pcpu);
63 * Array of dynamic pcpu base offsets. Indexed by id.
65 extern uintptr_t dpcpu_off[];
68 * Convenience defines.
70 #define DPCPU_START ((uintptr_t)&__start_set_pcpu)
71 #define DPCPU_STOP ((uintptr_t)&__stop_set_pcpu)
72 #define DPCPU_BYTES (DPCPU_STOP - DPCPU_START)
73 #define DPCPU_MODMIN 2048
74 #define DPCPU_SIZE roundup2(DPCPU_BYTES, PAGE_SIZE)
75 #define DPCPU_MODSIZE (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN))
78 * Declaration and definition.
80 #define DPCPU_NAME(n) pcpu_entry_##n
81 #define DPCPU_DECLARE(t, n) extern t DPCPU_NAME(n)
82 #define DPCPU_DEFINE(t, n) t DPCPU_NAME(n) __section(DPCPU_SETNAME) __used
85 * Accessors with a given base.
87 #define _DPCPU_PTR(b, n) \
88 (__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n))
89 #define _DPCPU_GET(b, n) (*_DPCPU_PTR(b, n))
90 #define _DPCPU_SET(b, n, v) (*_DPCPU_PTR(b, n) = v)
93 * Accessors for the current cpu.
95 #define DPCPU_PTR(n) _DPCPU_PTR(PCPU_GET(dynamic), n)
96 #define DPCPU_GET(n) (*DPCPU_PTR(n))
97 #define DPCPU_SET(n, v) (*DPCPU_PTR(n) = v)
100 * Accessors for remote cpus.
102 #define DPCPU_ID_PTR(i, n) _DPCPU_PTR(dpcpu_off[(i)], n)
103 #define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n))
104 #define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v)
109 #define DPCPU_SUM(n) __extension__ \
112 __typeof(*DPCPU_PTR(n)) sum; \
116 sum += *DPCPU_ID_PTR(_i, n); \
121 #define DPCPU_VARSUM(n, var) __extension__ \
124 __typeof((DPCPU_PTR(n))->var) sum; \
128 sum += (DPCPU_ID_PTR(_i, n))->var; \
133 #define DPCPU_ZERO(n) do { \
137 bzero(DPCPU_ID_PTR(_i, n), sizeof(*DPCPU_PTR(n))); \
144 * This structure maps out the global data that needs to be kept on a
145 * per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR
146 * macros defined in <machine/pcpu.h>. Machine dependent fields are
147 * defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
150 struct thread *pc_curthread; /* Current thread */
151 struct thread *pc_idlethread; /* Idle thread */
152 struct thread *pc_fpcurthread; /* Fp state owner */
153 struct thread *pc_deadthread; /* Zombie thread or NULL */
154 struct pcb *pc_curpcb; /* Current pcb */
155 uint64_t pc_switchtime; /* cpu_ticks() at last csw */
156 int pc_switchticks; /* `ticks' at last csw */
157 u_int pc_cpuid; /* This cpu number */
158 STAILQ_ENTRY(pcpu) pc_allcpu;
159 struct lock_list_entry *pc_spinlocks;
160 long pc_cp_time[CPUSTATES]; /* statclock ticks */
161 struct device *pc_device;
162 void *pc_netisr; /* netisr SWI cookie */
163 int pc_unused1; /* unused field */
164 int pc_domain; /* Memory domain. */
165 struct rm_queue pc_rm_queue; /* rmlock list of trackers */
166 uintptr_t pc_dynamic; /* Dynamic per-cpu data area */
167 uint64_t pc_early_dummy_counter; /* Startup time counter(9) */
170 * Keep MD fields last, so that CPU-specific variations on a
171 * single architecture don't result in offset variations of
172 * the machine-independent fields of the pcpu. Even though
173 * the pcpu structure is private to the kernel, some ports
174 * (e.g., lsof, part of gtop) define _KERNEL and include this
175 * header. While strictly speaking this is wrong, there's no
176 * reason not to keep the offsets of the MI fields constant
177 * if only to make kernel debugging easier.
180 } __aligned(CACHE_LINE_SIZE);
184 * To minimize memory waste in per-cpu UMA zones, size of struct pcpu
185 * should be denominator of PAGE_SIZE.
187 CTASSERT((PAGE_SIZE / sizeof(struct pcpu)) * sizeof(struct pcpu) == PAGE_SIZE);
192 STAILQ_HEAD(cpuhead, pcpu);
194 extern struct cpuhead cpuhead;
195 extern struct pcpu *cpuid_to_pcpu[];
197 #define curcpu PCPU_GET(cpuid)
198 #define curproc (curthread->td_proc)
200 #define curthread PCPU_GET(curthread)
202 #define curvidata PCPU_GET(vidata)
204 /* Accessor to elements allocated via UMA_ZONE_PCPU zone. */
206 zpcpu_get(void *base)
209 return ((char *)(base) + sizeof(struct pcpu) * curcpu);
213 zpcpu_get_cpu(void *base, int cpu)
216 return ((char *)(base) + sizeof(struct pcpu) * cpu);
220 * Machine dependent callouts. cpu_pcpu_init() is responsible for
221 * initializing machine dependent fields of struct pcpu, and
222 * db_show_mdpcpu() is responsible for handling machine dependent
223 * fields for the DDB 'show pcpu' command.
225 void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
226 void db_show_mdpcpu(struct pcpu *pcpu);
228 void *dpcpu_alloc(int size);
229 void dpcpu_copy(void *s, int size);
230 void dpcpu_free(void *s, int size);
231 void dpcpu_init(void *dpcpu, int cpuid);
232 void pcpu_destroy(struct pcpu *pcpu);
233 struct pcpu *pcpu_find(u_int cpuid);
234 void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
238 #endif /* !_SYS_PCPU_H_ */