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 * 4. 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/queue.h>
41 #include <sys/vmmeter.h>
42 #include <sys/resource.h>
43 #include <machine/pcpu.h>
49 * Define a set for pcpu data.
51 * We don't use SET_DECLARE because it defines the set as 'a' when we
52 * want 'aw'. GCC considers uninitialized data in a seperate section
53 * writable and there is no generic zero initializer that works for
54 * structs and scalars.
56 extern uintptr_t *__start_set_pcpu;
57 extern uintptr_t *__stop_set_pcpu;
60 __asm__(".section set_pcpu, \"aw\", %progbits");
62 __asm__(".section set_pcpu, \"aw\", @progbits");
67 * Array of dynamic pcpu base offsets. Indexed by id.
69 extern uintptr_t dpcpu_off[];
72 * Convenience defines.
74 #define DPCPU_START (uintptr_t)&__start_set_pcpu
75 #define DPCPU_STOP (uintptr_t)&__stop_set_pcpu
76 #define DPCPU_BYTES (DPCPU_STOP - DPCPU_START)
77 #define DPCPU_MODMIN 2048
78 #define DPCPU_SIZE roundup2(DPCPU_BYTES, PAGE_SIZE)
79 #define DPCPU_MODSIZE (DPCPU_SIZE - (DPCPU_BYTES - DPCPU_MODMIN))
82 * Declaration and definition.
84 #define DPCPU_NAME(n) pcpu_entry_##n
85 #define DPCPU_DECLARE(t, n) extern t DPCPU_NAME(n)
86 #define DPCPU_DEFINE(t, n) t DPCPU_NAME(n) __section("set_pcpu") __used
89 * Accessors with a given base.
91 #define _DPCPU_PTR(b, n) \
92 (__typeof(DPCPU_NAME(n))*)((b) + (uintptr_t)&DPCPU_NAME(n))
93 #define _DPCPU_GET(b, n) (*_DPCPU_PTR(b, n))
94 #define _DPCPU_SET(b, n, v) (*_DPCPU_PTR(b, n) = v)
97 * Accessors for the current cpu.
99 #define DPCPU_PTR(n) _DPCPU_PTR(PCPU_GET(dynamic), n)
100 #define DPCPU_GET(n) (*DPCPU_PTR(n))
101 #define DPCPU_SET(n, v) (*DPCPU_PTR(n) = v)
104 * Accessors for remote cpus.
106 #define DPCPU_ID_PTR(i, n) _DPCPU_PTR(dpcpu_off[(i)], n)
107 #define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n))
108 #define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v)
111 * XXXUPS remove as soon as we have per cpu variable
112 * linker sets and can define rm_queue in _rm_lock.h
115 struct rm_queue* volatile rmq_next;
116 struct rm_queue* volatile rmq_prev;
119 #define PCPU_NAME_LEN (sizeof("CPU ") + sizeof(__XSTRING(MAXCPU) + 1))
123 * This structure maps out the global data that needs to be kept on a
124 * per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR
125 * macros defined in <machine/pcpu.h>. Machine dependent fields are
126 * defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
129 struct thread *pc_curthread; /* Current thread */
130 struct thread *pc_idlethread; /* Idle thread */
131 struct thread *pc_fpcurthread; /* Fp state owner */
132 struct thread *pc_deadthread; /* Zombie thread or NULL */
133 struct pcb *pc_curpcb; /* Current pcb */
134 uint64_t pc_switchtime;
136 u_int pc_cpuid; /* This cpu number */
137 cpumask_t pc_cpumask; /* This cpu mask */
138 cpumask_t pc_other_cpus; /* Mask of all other cpus */
139 SLIST_ENTRY(pcpu) pc_allcpu;
140 struct lock_list_entry *pc_spinlocks;
142 char pc_name[PCPU_NAME_LEN]; /* String name for KTR. */
144 struct vmmeter pc_cnt; /* VM stats counters */
145 long pc_cp_time[CPUSTATES]; /* statclock ticks */
146 struct device *pc_device;
147 void *pc_netisr; /* netisr SWI cookie. */
150 * Stuff for read mostly lock
152 * XXXUPS remove as soon as we have per cpu variable
155 struct rm_queue pc_rm_queue;
158 * Dynamic per-cpu data area.
160 uintptr_t pc_dynamic;
163 * Keep MD fields last, so that CPU-specific variations on a
164 * single architecture don't result in offset variations of
165 * the machine-independent fields of the pcpu. Even though
166 * the pcpu structure is private to the kernel, some ports
167 * (e.g. lsof, part of gtop) define _KERNEL and include this
168 * header. While strictly speaking this is wrong, there's no
169 * reason not to keep the offsets of the MI fields contants.
170 * If only to make kernel debugging easier...
177 SLIST_HEAD(cpuhead, pcpu);
179 extern struct cpuhead cpuhead;
181 #define curcpu PCPU_GET(cpuid)
182 #define curproc (curthread->td_proc)
184 #define curthread PCPU_GET(curthread)
186 #define curvidata PCPU_GET(vidata)
189 * Machine dependent callouts. cpu_pcpu_init() is responsible for
190 * initializing machine dependent fields of struct pcpu, and
191 * db_show_mdpcpu() is responsible for handling machine dependent
192 * fields for the DDB 'show pcpu' command.
195 extern struct pcpu *cpuid_to_pcpu[MAXCPU];
198 void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
199 void db_show_mdpcpu(struct pcpu *pcpu);
201 void pcpu_destroy(struct pcpu *pcpu);
202 struct pcpu *pcpu_find(u_int cpuid);
203 void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
204 void *dpcpu_alloc(int size);
205 void dpcpu_copy(void *s, int size);
206 void dpcpu_free(void *s, int size);
207 void dpcpu_init(void *dpcpu, int cpuid);
211 #endif /* !_SYS_PCPU_H_ */