The copystr routine copies string s1 to the buffer pointed to by s2. The routine stops after copying a null character or after copying maxlength characters, whichever comes first. The s2 buffer is not...
The copy_to_phys routine copies a specified amount of virtually addressed memory to physically addressed memory. The addresses reside only in system memory space and not in the memory space on I/O bus...
The cpu global variable provides a unique logical family identifier of the processor type of the running system. The logical system name can represent a single processor or a family of processor types...
The current_task routine returns a pointer to the task structure associated with the currently running kernel thread. A device driver typically calls this routine in preparation for doing a DMA operat...
The current_thread routine is a pointer to the currently running kernel thread. Typically, kernel modules use this routine to reference the wait_result member of the thread structure pointer associate...
The datamsg interface tests the type of message to determine if it is a data message type. The following list identifies the data message value types: Ordinary data Requests a real-time delay Internal...
The decl_simple_lock_data routine declares a simple lock structure, slock, of the specified name. You declare a simple lock structure to protect data structures and device register access. You use dec...
The DELAY routine delays the calling routine a specified number of microseconds. DELAY spins, waiting for the specified number of microseconds to pass before continuing execution. For example, the fol...
The do_config routine initializes the specified controller based on its power-up resource assignments. If the device uses either an interrupt or a DMA channel, then do_config also performs any setup r...
The dupb interface creates a new message block structure to reference the message block pointed to by the message_block_ptr argument. Unlike copyb, the dupb interface does not copy the information in ...
The dupmsg interface forms a new message by copying the message block descriptors pointed to by the message_block_ptr argument and linking them. The dupmsg interface calls dupb for each message block....
The enableok interface allows the queue associated with the queue_pointer argument to be rescheduled for service. The interface cancels the effect of a previous call to the noenable interface on the q...
The esballoc interface creates a STREAMS message and attaches a user-supplied data buffer in place of a STREAMS data buffer. The interface calls allocb to obtain a message and data block header. The u...
