Access method and device for input/output port

Abstract

The invention discloses an access method and device for an input / output port. The access method includes the steps that a device file of a current operation system is analyzed, and whether an interface device file exists in the device file of the operation system or not is judged; if not, device interface process information is added in a system kernel of the operation system, so that the device file of the operation system is prompted to have the interface device file; through a preset functional instruction, the interface device file is called to have access to the input / output port. When the operation system lacks the interface device file, the device interface progress information is added, so that the operation system is prompted to have the interface device file, a user can call the interface device file to have the access to the port through the preset functional instruction, the trouble that a mmap function, mapping and other operation need to be called to have the access to the input / output port by user space is avoided, and technical requirements are reduced for the user.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method and device for accessing an input / output port. Background technique [0002] Under the X86 system architecture, when accessing the IO port in the user space, the IO port access instructions in and out provided by the X86 architecture are usually used for access. However, under other system architectures such as the average execution speed of single-word fixed-point instructions (Million Instructions Per Second, hereinafter referred to as MIPS), there are no instructions in and out. In this way, you can only use other methods for IO port access. [0003] Other access methods in the prior art include using the mmap function in C language to map the address space where the IO port is located to the user space, and accessing the IO port is achieved by accessing the address in the address space. However, using the mmap function call to map the address space where the IO port is loc...

AI Technical Summary

Problems solved by technology

This method is not suitable for novice users

Moreover, this method is found in the process of use, which cannot withstand the long-term system stability function test

[0004] Aiming at the problems of high technical requirements for users and failure to withstand the long-term system stability function test in the way of accessing IO ports in user space under the non-X86 system architecture in related technologies, no effective solution has been proposed yet

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