Access method and device for paging register

Abstract

The invention relates to a method and device for accessing a paging register. The paging register includes a page address register and a data register. The data register is divided into two or more register pages. The page address register is used to store the page identifier of the accessed register page. The data register uses an internal address for addressing, and the internal address includes the page of the register page. Identification and the external address of the data register, the method includes: receiving the external address of the page address register, accessing the page address register according to the external address of the page address register, reading the page identification of the accessed register page; receiving the external address of the accessed data register , generate the internal address of the accessed data register, and access the register page according to the internal address of the accessed data register. The present invention can realize that when the width of the address bus is constant, even if the number of registers to be accessed is greater than the address space range that can be allocated, 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 accessed is greater than the address space that can be allocated, how to access the registers becomes a problem

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