1 | /* $NetBSD: lwpctl.h,v 1.4 2008/04/28 20:24:10 martin Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2007, 2008 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Andrew Doran. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #if !defined(_SYS_LWPCTL_H_) |
33 | #define _SYS_LWPCTL_H_ |
34 | |
35 | /* |
36 | * Note on compatibility: |
37 | * |
38 | * This must be the same size for both 32 and 64-bit processes, since |
39 | * the same format will be used by both. |
40 | * |
41 | * Removal of unused fields is OK, as long as the change in layout |
42 | * does not affect supported fields. |
43 | * |
44 | * It is OK to add fields to this structure, since the kernel allocates |
45 | * the space. Re-use of fields is more complicated - see the feature |
46 | * word passed to the system call. |
47 | */ |
48 | typedef struct lwpctl { |
49 | volatile int lc_curcpu; |
50 | volatile int lc_pctr; |
51 | } lwpctl_t; |
52 | |
53 | #define LWPCTL_CPU_NONE (-1) |
54 | #define LWPCTL_CPU_EXITED (-2) |
55 | |
56 | #define LWPCTL_FEATURE_CURCPU 0x00000001 |
57 | #define LWPCTL_FEATURE_PCTR 0x00000002 |
58 | |
59 | #if defined(_KERNEL) |
60 | |
61 | #include <sys/mutex.h> |
62 | |
63 | #include <uvm/uvm_extern.h> |
64 | |
65 | typedef struct lcpage { |
66 | TAILQ_ENTRY(lcpage) lcp_chain; |
67 | vaddr_t lcp_uaddr; |
68 | vaddr_t lcp_kaddr; |
69 | u_int lcp_nfree; |
70 | u_int lcp_rotor; |
71 | u_int lcp_bitmap[1]; |
72 | } lcpage_t; |
73 | |
74 | typedef struct lcproc { |
75 | kmutex_t lp_lock; |
76 | struct uvm_object *lp_uao; |
77 | TAILQ_HEAD(,lcpage) lp_pages; |
78 | vaddr_t lp_cur; |
79 | vaddr_t lp_max; |
80 | vaddr_t lp_uva; |
81 | } lcproc_t; |
82 | |
83 | #define LWPCTL_PER_PAGE ((PAGE_SIZE / sizeof(lwpctl_t)) & ~31) |
84 | #define LWPCTL_BITMAP_ENTRIES (LWPCTL_PER_PAGE >> 5) |
85 | #define LWPCTL_BITMAP_SZ (LWPCTL_BITMAP_ENTRIES * sizeof(u_int)) |
86 | #define LWPCTL_LCPAGE_SZ \ |
87 | (sizeof(lcpage_t) - sizeof(u_int) + LWPCTL_BITMAP_SZ) |
88 | #define LWPCTL_UAREA_SZ \ |
89 | (round_page(MAX_LWP_PER_PROC * sizeof(lwpctl_t))) |
90 | |
91 | int lwp_ctl_alloc(vaddr_t *); |
92 | void lwp_ctl_free(lwp_t *); |
93 | void lwp_ctl_exit(void); |
94 | |
95 | #endif /* defined(_KERNEL) */ |
96 | |
97 | #endif /* !_SYS_LWPCTL_H_ */ |
98 | |