Method and device for accessing paging register

Abstract

The invention relates to a method and a device for accessing a paging register. The paging register comprises a page address register and a data register, wherein the data register is divided into more than two register pages; the page address register is used for storing the page identification of each accessed register page; the data register adopts an internal address to find the address, and the internal address comprises the page identification of each register page and an external address of the data register. The method comprises the following steps of receiving the external address of the page address register; according to the external address of the page address register, accessing the page address register, and reading the page identification of each accessed register page; receiving the external address of the accessed data register, generating the internal address of the accessed data register, and accessing the corresponding register page according to the internal address of the accessed data register. The method has the advantage that when the width of an address bus is set, even if the number of the accessed registers is greater than the distributed address space range, all registers can be accessed.

Description

technical field [0001] The present invention relates to the field of registers, in particular to a method and device for accessing paging registers. Background technique [0002] Currently, in the design of a system-on-chip (SOC for short), basically a register file is used, and the register file is generally used to store software control signals and some status signals for hardware. [0003] In the register list, an address is assigned to each register, and then the address is accessed through the communication interface to realize access to the register, thereby realizing operations such as reading and writing of the register. When assigning addresses to registers, the range of the address space is generally determined by the width of the address bus. When the width of the address bus is constant, it means that the range of the address space has been fixed, that is to say, the number of registers that can be accessed has been determined. deal. Assuming that the address ...

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Problems solved by technology

[0004] However, when the width of the address bus is constant, if the number of registers to be accesse

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