pSOSystem System Calls - Read

pSOS+ System Calls de_init
de_init Initializes an I/O device and its driver.
#include
unsigned long de_init(
unsigned long dev, /* major/minor device number */
void *iopb, /* I/O parameter block */
void *retval, /* return value */
void **data_area /* device data area */
)
Description
Arguments
The de_init() call invokes the device initialization routine of the pSOS+ device
driver specified by the dev argument.
The drive init routine can perform one-time device initialization functions such as:
■ Resetting the devices
■ Setting the necessary programmable registers
■ Allocating and/or initializing the driver's data area (for pointers, counters, and
so on)
■ Creating the messages queues, semaphores, and so on, that are needed for
communication and synchronization
■ Installing the interrupt vectors, if necessary
dev Specifies the major and minor device numbers, which are
stored in the upper and lower 16 bits, respectively.
iopb Points to an I/O parameter block, the contents of which are
driver-specific.
retval Points to a variable that receives a driver-specific value
returned by the driver.
pSOSystem System Calls 1-15
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