Video memory allocation method and device based on 32/64-bit hybrid operating system

Abstract

The invention provides a video memory distribution method and device based on a 32 / 64-bit hybrid operating system. The method comprises the following steps: when the hybrid operating system is started, setting a memory reservation value through a BIOS (Basic Input / Output System), and transferring the memory reservation value into a kernel so as to reserve a dedicated memory in a low 32-bit memory of the hybrid operating system; through the kernel, initializing the memory except the memory reservation value in the low 32-bit memory of the hybrid operating system; declaring to the kernel that the memory corresponding to the memory reservation value is the dedicated memory of a video card; and when a use request command sent from the driver of the video card is received, distributing the memory for the video card in the dedicated memory of the video card. In the method, the memory distributed to the video card can be guaranteed to be the memory which is lower than the 32 bits in the memory of the operating system to realize a purpose that the memory video cards distributed to the video card can be accessed, the problems that the distributed memory video card can not be accessed and resources are wasted are avoided.

Description

technical field [0001] The invention relates to computer processing technology, in particular to a video memory allocation method and device based on a 32 / 64-bit hybrid operating system. Background technique [0002] Currently, for a conventional 32-bit system or a 64-bit system, when a shared-memory graphics card needs to allocate memory, it directly allocates a part of the memory from the remaining space of the system as the memory of the graphics card. [0003] In the prior art, for a 32 / 64-bit mixed operating system, especially for an integrated display chip without independent video memory, the allocation method of a conventional 32-bit system or 64-bit system continues to be used. However, in a 32 / 64-bit mixed operating system, most of the address segments lower than 32 bits are occupied by the kernel, and most of the physical addresses of the memory are allocated to address segments higher than 32 bits, and many graphics cards are 32-bit, not It has 64-bit memory acc...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a video memory allocation method and device based on a 32 / 64-bit hybrid operating system, which is used to solve the problem in the prior art that the memory allocated for the video card cannot be accessed by the video card

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