/*
* Copyright ( C ) 2004 Florian Schirmer < jolt @ tuxbox . org >
*
* This program is free software ; you can redistribute it and / or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation ; either version 2 of the License , or ( at your
* option ) any later version .
*
* THIS SOFTWARE IS PROVIDED ` ` AS IS ' ' AND ANY EXPRESS OR IMPLIED
* WARRANTIES , INCLUDING , BUT NOT LIMITED TO , THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED . IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT , INDIRECT ,
* INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL DAMAGES ( INCLUDING , BUT
* NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES ; LOSS OF
* USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY , OR TORT
* ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE .
*
* You should have received a copy of the GNU General Public License along
* with this program ; if not , write to the Free Software Foundation , Inc . ,
* 675 Mass Ave , Cambridge , MA 02139 , USA .
*/
#include <linux/init.h>
#include <linux/ssb/ssb.h>
#include <asm /time.h>
#include <bcm47xx.h>
#include <bcm47xx_board.h>
void __init plat_time_init(void )
{
unsigned long hz = 0 ;
u16 chip_id = 0 ;
char buf[10 ];
int len;
enum bcm47xx_board board = bcm47xx_board_get();
/*
* Use deterministic values for initial counter interrupt
* so that calibrate delay avoids encountering a counter wrap .
*/
write_c0_count(0 );
write_c0_compare(0 xffff);
switch (bcm47xx_bus_type) {
#ifdef CONFIG_BCM47XX_SSB
case BCM47XX_BUS_TYPE_SSB:
hz = ssb_cpu_clock(&bcm47xx_bus.ssb.mipscore) / 2 ;
chip_id = bcm47xx_bus.ssb.chip_id;
break ;
#endif
#ifdef CONFIG_BCM47XX_BCMA
case BCM47XX_BUS_TYPE_BCMA:
hz = bcma_cpu_clock(&bcm47xx_bus.bcma.bus.drv_mips) / 2 ;
chip_id = bcm47xx_bus.bcma.bus.chipinfo.id;
break ;
#endif
}
if (chip_id == 0 x5354) {
len = bcm47xx_nvram_getenv("clkfreq" , buf, sizeof (buf));
if (len >= 0 && !strncmp(buf, "200" , 4 ))
hz = 100000000 ;
}
switch (board) {
case BCM47XX_BOARD_ASUS_WL520GC:
case BCM47XX_BOARD_ASUS_WL520GU:
hz = 100000000 ;
break ;
default :
break ;
}
if (!hz)
hz = 100000000 ;
/* Set MIPS counter frequency for fixed_rate_gettimeoffset() */
mips_hpt_frequency = hz;
}
Messung V0.5 in Prozent C=97 H=92 G=94
¤ Dauer der Verarbeitung: 0.10 Sekunden
(vorverarbeitet am 2026-10-01)
¤
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