sanchayanmaity/minix
1
0
Fork 0
Code Issues Pull requests Packages Projects Releases Wiki Activity

arm:timer changes.

Browse source 
* Allow to change the timer frequency using the hz paramter.
* Unmask the interrupt only after registering the handler.
* Pass the hz parameter in the command line.
This commit is contained in:
Kees Jongenburger 2013-08-27 14:23:34 +02:00 committed by Gerrit Code Review
parent 88c79fc9e9
commit e4be0ceecf
2 changed files with 12 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
kernel/arch/earm/omap_timer.c
View file

@ -138,6 +138,8 @@ int omap3_register_timer_handler(const irq_handler_t handler)
omap3_timer_hook.irq = timer.irq_nr;
put_irq_handler(&omap3_timer_hook, timer.irq_nr, handler);
/* only unmask interrupts after registering */
omap3_irq_unmask(timer.irq_nr);
return 0;
}
@ -211,6 +213,7 @@ void omap3_frclock_stop()
void omap3_timer_init(unsigned freq)
{
/* we only support 1ms resolution */
u32_t tisr;
kern_phys_map_ptr(timer.base,ARM_PAGE_SIZE,
&timer_phys_map, (vir_bytes) &timer.base);
@ -239,15 +242,15 @@ void omap3_timer_init(unsigned freq)
/* Use 1-ms tick mode for GPTIMER1 TRM 16.2.4.2.1 */
mmio_write(timer.base + timer.regs->TPIR, 232000);
mmio_write(timer.base + timer.regs->TNIR, -768000);
mmio_write(timer.base + timer.regs->TLDR, 0xffffffe0);
mmio_write(timer.base + timer.regs->TCRR, 0xffffffe0);
mmio_write(timer.base + timer.regs->TLDR, 0xffffffff - (32768 / freq) +1);
mmio_write(timer.base + timer.regs->TCRR, 0xffffffff - (32768 / freq) +1);
/* Set up overflow interrupt */
tisr = OMAP3_TISR_MAT_IT_FLAG | OMAP3_TISR_OVF_IT_FLAG |
OMAP3_TISR_TCAR_IT_FLAG;
mmio_write(timer.base + timer.regs->TISR, tisr); /* Clear interrupt status */
mmio_write(timer.base + timer.regs->TIER, OMAP3_TIER_OVF_IT_ENA);
omap3_irq_unmask(timer.irq_nr);
/* Start timer */
mmio_set(timer.base + timer.regs->TCLR,

7
releasetools/gen_cmdline.txt.sh
View file

@ -3,6 +3,7 @@
CONSOLE=tty02
#verbosity
VERBOSE=3
HZ=1000
while getopts "c:v:?" c
do
case "$c" in
@ -18,8 +19,12 @@ do
# genrate netbooting uEnv.txt
VERBOSE=$OPTARG
;;
h)
# system hz
HZ=$OPTARG
;;
esac
done
echo console=$CONSOLE rootdevname=c0d0p1s0 verbose=$VERBOSE
echo console=$CONSOLE rootdevname=c0d0p1s0 verbose=$VERBOSE hz=$HZ