General-Purpose Timer 0 Reload; General-Purpose Timer 1 - Intel IXP45X Developer's Manual

Operating System Timer—Intel
18.5.3

General-Purpose Timer 0 Reload

Register Name:
Physical Address:
Register Description:
Access: Read/Write
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Register
Bits Name
Reload value. Value to be reloaded into ost_tim0. Bits 1 and 0 will be
fetched from ost_tim0_cfg.
For predictable operation, stop the timer before writing a new value
31:2 reload_val
into the reload register.
Note:
The one_shot control bit specifies what action should be taken when
the counter reaches zero. If the one_shot control bit is set to zero,
1 tim1_one_shot when the counter reaches zero it will load the "reload value register"
and start counting down. If the one_shot control register is set to one
it will load the "reload value register" and stop counting.
The cnt_enable register controls whether the counter is enabled for
0 tim0_enable
counting. When set to one the counter is enabled.
18.5.4

General-Purpose Timer 1

Register Name:
Physical Address:
Register Description:
Access: Read
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
Register
Bits Name
31:0 timer_val Current value of the timer
August 2006
Order Number: 306262-004US
® ®
IXP45X and Intel IXP46X Product Line of Network Processors
0xC8005008
General-Purpose Timer 0 Reload
reload_val
Description
As the counter counts to zero, writing a value of X to these
bits will generate interrupts at intervals of (X*4)+1 cycles,
unless the two least significant bits in ost_tim0_cfg are filled.
0xC800500C
General-Purpose Timer 1
timer_val
Description
Intel
ost_tim0_rl
Reset Hex Value:
ost_tim0_rl
ost_tim1
Reset Hex Value:
ost_tim1
® ®
IXP45X and Intel IXP46X Product Line of Network Processors
0x00000000
8 7 6 5 4 3 2 1
Reset
Access
Value
30'd0 RW
0 RW
0 RW
0x00000000
8 7 6 5 4 3 2 1
Reset
Access
Value
32'd0 RO
Developer's Manual
0
0
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