A kind of fast start-up SOC chip and its realization method

Abstract

The invention provides an SOC (system on a chip) achieving quick start-up and a realization method of the SOC. The SOC achieving the quick start-up comprises a CPU (central processing unit) and a cache, wherein the CPU is connected with an external memory by the cache; the CPU and the cache are connected with a power path controller; the CPU reads program instructions required for the start-up into the cache from the external memory during shutdown; and during second start-up, after the CPU is reset, the CPU reads the program instructions required for the start-up in the cache. According to the SOC and the realization method, since start-up programs are stored in the cache during the shutdown, the most consumed time, namely external memory handling time, is saved during the second start-up, and the start-up can be accelerated greatly.

Description

technical field [0001] The invention relates to a SOC chip and its realization method. Background technique [0002] With the advancement of technology, more and more intelligent handheld devices have become more and more intelligent. However, due to the complex software and various hardware of smart devices, a large number of initialization programs need to be read at startup, and because initialization programs are usually stored in external memory, external memory The reading speed is very slow, resulting in the generally slow boot speed of smart handheld devices. In order to improve the boot speed, some devices will open the cache after booting, first move the programs in the external storage to the cache, and then use the cache to perform auxiliary startup. In this way, compared with reading an instruction from the external storage, it can be executed immediately. Part of the boot time is reduced, but this method still takes the longest part: the time for moving the pr...

AI Technical Summary

Problems solved by technology

[0002] With the advancement of technology, more and more intelligent handheld devices have become more and more intelligent. However, due to the complex software and various hardware of smart devices, a large number of initialization programs need to be read at startup, and because initialization programs are usually stored in external memory, external memory The reading speed is very slow, resulting in the generally slow boot speed of smart handheld devices

In order to improve the boot speed, some devices will open the cache after booting, first move the programs in the external storage to the cache, and then use the cache to perform auxiliary startup. In this way, compared with reading an instruction from the external storage, it can be executed immediately. Reduce part of the boot time, but this method is still the longest part: the time for moving the program from the external storage to the chip is not reduced

The startup speed of smart handheld devices is generally slow

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