Rev 2015 | Rev 2141 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 2015 | Rev 2071 | ||
---|---|---|---|
1 | /* |
1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
2 | * Copyright (c) 2006 Ondrej Palkovsky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup libc |
29 | /** @addtogroup libc |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <sys/time.h> |
35 | #include <sys/time.h> |
36 | #include <unistd.h> |
36 | #include <unistd.h> |
37 | #include <ipc/ipc.h> |
37 | #include <ipc/ipc.h> |
38 | #include <stdio.h> |
38 | #include <stdio.h> |
39 | #include <arch/barrier.h> |
39 | #include <arch/barrier.h> |
40 | #include <unistd.h> |
40 | #include <unistd.h> |
41 | #include <atomic.h> |
41 | #include <atomic.h> |
42 | #include <futex.h> |
42 | #include <futex.h> |
43 | #include <sysinfo.h> |
43 | #include <sysinfo.h> |
44 | #include <ipc/services.h> |
44 | #include <ipc/services.h> |
45 | 45 | ||
46 | #include <sysinfo.h> |
46 | #include <sysinfo.h> |
47 | #include <as.h> |
47 | #include <as.h> |
48 | #include <ddi.h> |
48 | #include <ddi.h> |
49 | 49 | ||
50 | /* Pointers to public variables with time */ |
50 | /* Pointers to public variables with time */ |
51 | struct { |
51 | struct { |
52 | volatile sysarg_t seconds1; |
52 | volatile sysarg_t seconds1; |
53 | volatile sysarg_t useconds; |
53 | volatile sysarg_t useconds; |
54 | volatile sysarg_t seconds2; |
54 | volatile sysarg_t seconds2; |
55 | } *ktime = NULL; |
55 | } *ktime = NULL; |
56 | 56 | ||
57 | 57 | ||
58 | /** POSIX gettimeofday |
58 | /** POSIX gettimeofday |
59 | * |
59 | * |
60 | * The time variables are memory mapped(RO) from kernel, which updates |
60 | * The time variables are memory mapped(RO) from kernel, which updates |
61 | * them periodically. As it is impossible to read 2 values atomically, we |
61 | * them periodically. As it is impossible to read 2 values atomically, we |
62 | * use a trick: First read a seconds, then read microseconds, then |
62 | * use a trick: First read a seconds, then read microseconds, then |
63 | * read seconds again. If a second elapsed in the meantime, set it to zero. |
63 | * read seconds again. If a second elapsed in the meantime, set it to zero. |
64 | * This provides assurance, that at least the |
64 | * This provides assurance, that at least the |
65 | * sequence of subsequent gettimeofday calls is ordered. |
65 | * sequence of subsequent gettimeofday calls is ordered. |
66 | */ |
66 | */ |
67 | int gettimeofday(struct timeval *tv, struct timezone *tz) |
67 | int gettimeofday(struct timeval *tv, struct timezone *tz) |
68 | { |
68 | { |
69 | void *mapping; |
69 | void *mapping; |
70 | sysarg_t s1, s2; |
70 | sysarg_t s1, s2; |
71 | sysarg_t rights; |
71 | sysarg_t rights; |
72 | int res; |
72 | int res; |
73 | 73 | ||
74 | if (!ktime) { |
74 | if (!ktime) { |
75 | mapping = as_get_mappable_page(PAGE_SIZE, (int) |
75 | mapping = as_get_mappable_page(PAGE_SIZE, (int) |
76 | sysinfo_value("clock.fcolor")); |
76 | sysinfo_value("clock.fcolor")); |
77 | /* Get the mapping of kernel clock */ |
77 | /* Get the mapping of kernel clock */ |
78 | res = ipc_call_sync_3(PHONE_NS, IPC_M_AS_AREA_RECV, (sysarg_t) |
78 | res = ipc_call_sync_3(PHONE_NS, IPC_M_AS_AREA_RECV, (sysarg_t) |
79 | mapping, PAGE_SIZE, SERVICE_MEM_REALTIME, NULL, &rights, |
79 | mapping, PAGE_SIZE, SERVICE_MEM_REALTIME, NULL, &rights, |
80 | NULL); |
80 | NULL); |
81 | if (res) { |
81 | if (res) { |
82 | printf("Failed to initialize timeofday memarea\n"); |
82 | printf("Failed to initialize timeofday memarea\n"); |
83 | _exit(1); |
83 | _exit(1); |
84 | } |
84 | } |
85 | if (! (rights & AS_AREA_READ)) { |
85 | if (! (rights & AS_AREA_READ)) { |
86 | printf("Received bad rights on time area: %X\n", |
86 | printf("Received bad rights on time area: %X\n", |
87 | rights); |
87 | rights); |
88 | as_area_destroy(mapping); |
88 | as_area_destroy(mapping); |
89 | _exit(1); |
89 | _exit(1); |
90 | } |
90 | } |
91 | ktime = mapping; |
91 | ktime = mapping; |
92 | } |
92 | } |
93 | if (tz) { |
93 | if (tz) { |
94 | tz->tz_minuteswest = 0; |
94 | tz->tz_minuteswest = 0; |
95 | tz->tz_dsttime = DST_NONE; |
95 | tz->tz_dsttime = DST_NONE; |
96 | } |
96 | } |
97 | 97 | ||
98 | s2 = ktime->seconds2; |
98 | s2 = ktime->seconds2; |
99 | read_barrier(); |
99 | read_barrier(); |
100 | tv->tv_usec = ktime->useconds; |
100 | tv->tv_usec = ktime->useconds; |
101 | read_barrier(); |
101 | read_barrier(); |
102 | s1 = ktime->seconds1; |
102 | s1 = ktime->seconds1; |
103 | if (s1 != s2) { |
103 | if (s1 != s2) { |
104 | tv->tv_usec = 0; |
104 | tv->tv_usec = 0; |
105 | tv->tv_sec = s1 > s2 ? s1 : s2; |
105 | tv->tv_sec = s1 > s2 ? s1 : s2; |
106 | } else |
106 | } else |
107 | tv->tv_sec = s1; |
107 | tv->tv_sec = s1; |
108 | 108 | ||
109 | return 0; |
109 | return 0; |
110 | } |
110 | } |
111 | 111 | ||
112 | /** Wait unconditionally for specified microseconds */ |
112 | /** Wait unconditionally for specified microseconds */ |
113 | void usleep(unsigned long usec) |
113 | void usleep(unsigned long usec) |
114 | { |
114 | { |
115 | atomic_t futex = FUTEX_INITIALIZER; |
115 | atomic_t futex = FUTEX_INITIALIZER; |
116 | 116 | ||
117 | futex_initialize(&futex,0); |
117 | futex_initialize(&futex,0); |
118 | futex_down_timeout(&futex, usec, 0); |
118 | futex_down_timeout(&futex, usec, 0); |
119 | } |
119 | } |
120 | 120 | ||
121 | /** @} |
121 | /** @} |
122 | */ |
122 | */ |
123 | 123 |