Rev 1547 | Rev 1653 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
Rev 1547 | Rev 1596 | ||
---|---|---|---|
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 | #include <sys/time.h> |
29 | #include <sys/time.h> |
30 | #include <unistd.h> |
30 | #include <unistd.h> |
31 | #include <ipc/ipc.h> |
31 | #include <ipc/ipc.h> |
32 | #include <stdio.h> |
32 | #include <stdio.h> |
33 | #include <arch/barrier.h> |
33 | #include <arch/barrier.h> |
34 | #include <unistd.h> |
34 | #include <unistd.h> |
35 | #include <atomic.h> |
35 | #include <atomic.h> |
36 | #include <futex.h> |
36 | #include <futex.h> |
- | 37 | #include <ipc/services.h> |
|
37 | 38 | ||
38 | #include <sysinfo.h> |
39 | #include <sysinfo.h> |
39 | #include <as.h> |
40 | #include <as.h> |
40 | #include <ddi.h> |
41 | #include <ddi.h> |
41 | 42 | ||
42 | /* Pointers to public variables with time */ |
43 | /* Pointers to public variables with time */ |
43 | struct { |
44 | struct { |
44 | volatile sysarg_t seconds1; |
45 | volatile sysarg_t seconds1; |
45 | volatile sysarg_t useconds; |
46 | volatile sysarg_t useconds; |
46 | volatile sysarg_t seconds2; |
47 | volatile sysarg_t seconds2; |
47 | } *ktime = NULL; |
48 | } *ktime = NULL; |
48 | 49 | ||
49 | 50 | ||
50 | /** POSIX gettimeofday |
51 | /** POSIX gettimeofday |
51 | * |
52 | * |
52 | * The time variables are memory mapped(RO) from kernel, which updates |
53 | * The time variables are memory mapped(RO) from kernel, which updates |
53 | * them periodically. As it is impossible to read 2 values atomically, we |
54 | * them periodically. As it is impossible to read 2 values atomically, we |
54 | * use a trick: First read a seconds, then read microseconds, then |
55 | * use a trick: First read a seconds, then read microseconds, then |
55 | * read seconds again. If a second elapsed in the meantime, read |
56 | * read seconds again. If a second elapsed in the meantime, read |
56 | * useconds again. This provides assurance, that at least the |
57 | * useconds again. This provides assurance, that at least the |
57 | * sequence of subsequent gettimeofday calls is ordered. |
58 | * sequence of subsequent gettimeofday calls is ordered. |
58 | */ |
59 | */ |
59 | int gettimeofday(struct timeval *tv, struct timezone *tz) |
60 | int gettimeofday(struct timeval *tv, struct timezone *tz) |
60 | { |
61 | { |
61 | void *mapping; |
62 | void *mapping; |
62 | sysarg_t s1, s2; |
63 | sysarg_t s1, s2; |
63 | sysarg_t rights; |
64 | sysarg_t rights; |
64 | int res; |
65 | int res; |
65 | 66 | ||
66 | if (!ktime) { |
67 | if (!ktime) { |
67 | mapping = as_get_mappable_page(PAGE_SIZE); |
68 | mapping = as_get_mappable_page(PAGE_SIZE); |
68 | /* Get the mapping of kernel clock */ |
69 | /* Get the mapping of kernel clock */ |
69 | res = ipc_call_sync_3(PHONE_NS, IPC_M_AS_AREA_RECV, |
70 | res = ipc_call_sync_3(PHONE_NS, IPC_M_AS_AREA_RECV, |
70 | mapping, PAGE_SIZE, 0, |
71 | mapping, PAGE_SIZE, SERVICE_MEM_REALTIME, |
71 | NULL,&rights,NULL); |
72 | NULL,&rights,NULL); |
72 | if (res) { |
73 | if (res) { |
73 | printf("Failed to initialize timeofday memarea\n"); |
74 | printf("Failed to initialize timeofday memarea\n"); |
74 | _exit(1); |
75 | _exit(1); |
75 | } |
76 | } |
76 | if (! (rights & AS_AREA_READ)) { |
77 | if (! (rights & AS_AREA_READ)) { |
77 | printf("Received bad rights on time area: %X\n", |
78 | printf("Received bad rights on time area: %X\n", |
78 | rights); |
79 | rights); |
79 | as_area_destroy(mapping); |
80 | as_area_destroy(mapping); |
80 | _exit(1); |
81 | _exit(1); |
81 | } |
82 | } |
82 | ktime = mapping; |
83 | ktime = mapping; |
83 | } |
84 | } |
84 | if (tz) { |
85 | if (tz) { |
85 | tz->tz_minuteswest = 0; |
86 | tz->tz_minuteswest = 0; |
86 | tz->tz_dsttime = DST_NONE; |
87 | tz->tz_dsttime = DST_NONE; |
87 | } |
88 | } |
88 | 89 | ||
89 | s2 = ktime->seconds2; |
90 | s2 = ktime->seconds2; |
90 | read_barrier(); |
91 | read_barrier(); |
91 | tv->tv_usec = ktime->useconds; |
92 | tv->tv_usec = ktime->useconds; |
92 | read_barrier(); |
93 | read_barrier(); |
93 | s1 = ktime->seconds1; |
94 | s1 = ktime->seconds1; |
94 | if (s1 != s2) { |
95 | if (s1 != s2) { |
95 | tv->tv_usec = 0; |
96 | tv->tv_usec = 0; |
96 | tv->tv_sec = s1 > s2 ? s1 : s2; |
97 | tv->tv_sec = s1 > s2 ? s1 : s2; |
97 | } else |
98 | } else |
98 | tv->tv_sec = s1; |
99 | tv->tv_sec = s1; |
99 | 100 | ||
100 | return 0; |
101 | return 0; |
101 | } |
102 | } |
102 | 103 | ||
103 | /** Wait unconditionally for specified microseconds */ |
104 | /** Wait unconditionally for specified microseconds */ |
104 | void usleep(unsigned long usec) |
105 | void usleep(unsigned long usec) |
105 | { |
106 | { |
106 | atomic_t futex = FUTEX_INITIALIZER; |
107 | atomic_t futex = FUTEX_INITIALIZER; |
107 | 108 | ||
108 | futex_initialize(&futex,0); |
109 | futex_initialize(&futex,0); |
109 | futex_down_timeout(&futex, usec, 0); |
110 | futex_down_timeout(&futex, usec, 0); |
110 | } |
111 | } |
111 | 112 |