1 //==========================================================================
5 // eCos synthetic wallclock driver.
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
13 // eCos is free software; you can redistribute it and/or modify it under
14 // the terms of the GNU General Public License as published by the Free
15 // Software Foundation; either version 2 or (at your option) any later version.
17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 // You should have received a copy of the GNU General Public License along
23 // with eCos; if not, write to the Free Software Foundation, Inc.,
24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
26 // As a special exception, if other files instantiate templates or use macros
27 // or inline functions from this file, or you compile this file and link it
28 // with other works to produce a work based on this file, this file does not
29 // by itself cause the resulting work to be covered by the GNU General Public
30 // License. However the source code for this file must still be made available
31 // in accordance with section (3) of the GNU General Public License.
33 // This exception does not invalidate any other reasons why a work based on
34 // this file might be covered by the GNU General Public License.
36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
37 // at http://sources.redhat.com/ecos/ecos-license/
38 // -------------------------------------------
39 //####ECOSGPLCOPYRIGHTEND####
40 //==========================================================================
41 //#####DESCRIPTIONBEGIN####
43 // Author(s): Savin Zlobec <savin@elatec.si>
48 //####DESCRIPTIONEND####
50 //==========================================================================
52 #include <pkgconf/wallclock.h>
53 #include <pkgconf/devs_wallclock_synth.h>
55 #include <cyg/hal/hal_io.h>
56 #include <cyg/hal/hal_arch.h>
58 #include <cyg/infra/cyg_type.h>
59 #include <cyg/infra/diag.h>
61 #include <cyg/io/wallclock.hxx>
63 //-----------------------------------------------------------------------------
65 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
66 // Difference between system and eCos wallclock
67 static cyg_uint32 epoch_ticks;
68 static cyg_uint32 epoch_time_stamp;
71 //-----------------------------------------------------------------------------
72 // Functions required for the hardware-driver API.
74 // Initializes the clock
76 Cyg_WallClock::init_hw_seconds(void)
78 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
81 // Read difference between system and eCos wallclock from file
82 fd = cyg_hal_sys_open(CYGDAT_DEVS_WALLCLOCK_SYNTH_FILENAME,
83 CYG_HAL_SYS_O_RDONLY, 0);
87 cyg_hal_sys_read(fd, &epoch_time_stamp, sizeof(epoch_time_stamp));
88 cyg_hal_sys_read(fd, &epoch_ticks, sizeof(epoch_ticks));
89 cyg_hal_sys_close(fd);
94 // Returns the number of seconds elapsed since 1970-01-01 00:00:00
96 Cyg_WallClock::get_hw_seconds(void)
99 struct cyg_hal_sys_timeval ctv;
100 struct cyg_hal_sys_timezone ctz;
102 cyg_hal_sys_gettimeofday(&ctv, &ctz);
104 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
105 res = epoch_time_stamp + ctv.hal_tv_sec - epoch_ticks;
107 res = ctv.hal_tv_sec;
113 #ifdef CYGSEM_WALLCLOCK_SET_GET_MODE
115 // Sets the clock. Argument is seconds elapsed since 1970-01-01 00:00:00
117 Cyg_WallClock::set_hw_seconds(cyg_uint32 secs)
120 struct cyg_hal_sys_timeval ctv;
121 struct cyg_hal_sys_timezone ctz;
123 // System wallclock time
124 cyg_hal_sys_gettimeofday(&ctv, &ctz);
126 // Set the difference between the system and eCos wallclock
127 epoch_time_stamp = secs;
128 epoch_ticks = ctv.hal_tv_sec;
130 // Write difference to file
131 fd = cyg_hal_sys_open(CYGDAT_DEVS_WALLCLOCK_SYNTH_FILENAME,
132 CYG_HAL_SYS_O_WRONLY | CYG_HAL_SYS_O_CREAT,
133 CYG_HAL_SYS_S_IRWXU | CYG_HAL_SYS_S_IRWXG | CYG_HAL_SYS_S_IRWXO);
137 cyg_hal_sys_write(fd, &epoch_time_stamp, sizeof(epoch_time_stamp));
138 cyg_hal_sys_write(fd, &epoch_ticks, sizeof(epoch_ticks));
139 cyg_hal_sys_close(fd);
143 #endif // CYGSEM_WALLCLOCK_SET_GET_MODE
145 //-----------------------------------------------------------------------------
146 // EOF wallclock_synth.cxx