ASM does not start after system reboot

Metalink note if ASM is not coming up
https://support.oracle.com/CSP/main/article?cmd=show&id=947520.1&type=NOT


inf01% crsctl check css
CRS-4529: Cluster Synchronization Services is online
inf01% crsctl check has
CRS-4638: Oracle High Availability Services is online
inf01%


if has is not online : crsctl start has


Also, start the listener from $ASM_HOME. Also verify that ORACLE_HOME and ORACLE_SID are set correctly.