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get_info(9r) get_info(9r) NAME
get_info - General: Returns system-specific information SYNOPSIS
#include <devdriver.h> u_int get_info( struct item_list *item_list ); ARGUMENTS
Specifies a linked list of information requests. DESCRIPTION
The get_info routine returns system-specific data assigned to the hardware platform that the driver operates on. For example, a device driver might request system-specific information for the following Alpha hardware platforms: DEC 3000 Model 300 AXP Workstation, DEC 3000 Model 500 AXP Workstation, and DEC 4000 Model 610 AXP System. The get_info routine checks the function code that you pass in the function member of the item_list data structure. If the hardware plat- form that the driver operates on supports the system item associated with this function code, get_info returns the system-specific data for the system item in the output_data member of the item_list structure. For example, get_info returns the TURBOchannel clock speed in the output_data member of the item_list structure if you specify the constant GET_TC_SPEED in the function member of the item_list structure. The get_info routine then performs the identical checks for the rest of the item_list structures in the linked list. NOTES
The get_info routine is a generic interface that maps to a hardware platform-specific interface that actually returns the assigned CPU-spe- cific data for the specified CPU. Using this routine to obtain CPU-specific information makes the driver more portable across different CPU architectures and different CPU types within the same architecture. RETURN VALUES
The return value from the get_info routine depends on the following issues: The hardware platform supports get_info In this case, get_info returns the value TRUE. The hardware platform does not support get_info In this case, get_info returns the value NOT_SUPPORTED. If get_info returns the value TRUE, it returns one of the following values in the rtn_status member of the item_list data structure: Indi- cates that the hardware platform that the driver currently operates on supports the requested system item. Indicates that the hardware platform that the driver operates on does not support the requested system item. SEE ALSO
Routines: do_config(9r), get_config(9r) Data Structures: item_list(9s) get_info(9r)
