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Answer a silly question in a comment.

This commit is contained in:
gwr 1994-07-19 02:39:18 +00:00
parent dc718c003d
commit eb09e89755
1 changed files with 4 additions and 2 deletions
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6
sys/arch/sun3/sun3/delay.s
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@ -24,11 +24,13 @@
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: delay.s,v 1.1 1994/05/04 05:39:44 gwr Exp $
* $Id: delay.s,v 1.2 1994/07/19 02:39:18 gwr Exp $
*/
| These two routines depend on the variable "cpuspeed"
| which should be set to the CPU clock rate in MHz.
| XXX - Currently this is set in sun3_startup.c based on the
| CPU model but this should be determined at run time...
.data
.even
.globl _cpuspeed
@ -57,6 +59,7 @@ Ldelay:
| delay2us()
| Delay for at least 2.2 uS. (for the ZS driver).
| This actually takes about 2.4 uS. Just right.
| XXX - Need to make this work for any cpuspeed.
.even
.globl _delay2us
_delay2us:
@ -68,7 +71,6 @@ _delay2us:
jle Lrts
subql #5,d0 | d0=cpuspeed-25
jle Lrts
|XXX - Do any Sun3 CPUs go faster than 25 MHz?
subql #5,d0 | d0=cpuspeed-30
nop ; nop
Lrts: rts