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root@dm816x-evm:/home/driver# insmod vpss.ko sbufaddr=0xA0200000 notify_shm_drv_sendevent failed! status = 0xfffffff0 notify_send_event failed! status = 0xfffffff0 notify_shm_drv_sendevent failed! status = 0xfffffff0
我看了内核源代码，问题是出在下面：
/* Remote notification is not initialized */ #define NOTIFY_E_NOTINITIALIZED -16
/* Stamp indicating that the Notify Shared Memory driver on the * processor has been initialized. */ #define NOTIFYSHMDRIVER_INIT_STAMP 0xA9C8B7D6
/* Send a notification event to the registered users for this * notification on the specified processor. */ int notify_shm_drv_send_event(struct notify_driver_object *handle, u32 event_id, u32 payload, bool wait_clear) {
.............
/* Check whether driver on other processor is initialized */
if (obj->other_proc_ctrl->recv_init_status != \
NOTIFYSHMDRIVER_INIT_STAMP) { /* This may be used for polling till other-side driver is ready, * so do not set failure reason. */ status = NOTIFY_E_NOTINITIALIZED; goto exit; }
