Amlogic (Shanghai) Co., Ltd.

A memory management method and module, a chip, an electronic device, and a storage medium. The memory management method comprises: scanning memory pages to which virtual addresses of a discontinuous memory mapping space are mapped to acquire a compressible memory page as a first memory page; compressing memory data in the first memory page to acquire corresponding memory compressed data; storing the memory compressed data in a data storage module, the data storage module being located in memory space outside the discontinuous memory mapping space; after storing the memory compressed data in the data storage module, releasing the first memory page; and setting the corresponding virtual address as a page fault address. The memory utilization is improved.

A memory management method and module, a chip, an electronic device, and a storage medium. The memory management method comprises: scanning memory pages to which virtual addresses of a discontinuous memory mapping space are mapped to acquire a compressible memory page as a first memory page; compressing memory data in the first memory page to acquire corresponding memory compressed data; storing the memory compressed data in a data storage module, the data storage module being located in memory space outside the discontinuous memory mapping space; after storing the memory compressed data in the data storage module, releasing the first memory page; and setting the corresponding virtual address as a page fault address. The memory utilization is improved.

A method for releasing memory allocated by a contiguous memory allocator that merges a to-be-released memory page with an adjacent free page to form a memory block that can be released more efficiently than would be the case when releasing a series of un-merged memory pages.

The invention comprises a playing memory management method, comprising: Step S 1 , creating a contiguous memory area: Step S 2 , dividing a contiguous first memory range from the memory area when digital rights management playing information is received; Step S 3 , setting, by a secure operating system, an access permission for the first memory range; Step S 4 , performing, by the secure operating system, a decoding operation in the first memory range until the decoding operation is completed; and Step S 5 , clearing, by the secure operating system, data in the first memory range, releasing the access permission for the first memory range, and releasing the first memory range. The present invention has the beneficial effects that the memory sharing is realized by creating one memory area, setting the access permission during use and clearing data and releasing the access permission after use, so that the manufacturing cost is reduced.

The invention relates to a data edge jumping method, applied to a memory system, wherein the memory system comprises a processor and a memory driven by the processor, and a plurality of groups of data lines are connected between the processor and the memory. The data edge jumping method comprising: coding data output by the processor to enable total current produced by data transmission through each of the plurality of groups of data lines at the same time to be zero; transmitting the coded data through the plurality of groups of data cables, and decoding the data before reaching the memory; and inputting the decoded data into the memory, and enabling the total current produced in the data lines to be close to 0 A, so that electromagnetic interference is hardly produced by signals transmitted through the data lines, and allowance of signal radiation is large enough.

A microcode signature security management system based on a Trustzone technology comprises the steps of: starting a normal operating system; acquiring the signature-encrypted microcode file and outputting the signature-encrypted microcode file and a switching signal by the normal operating system; receiving the switching signal and starting the monitor mode by the microprocessor to start a secure operating system; receiving the signature-encrypted microcode file, performing signature verification on the signature-encrypted microcode file, loading the file when the signature verification passes, otherwise outputting microcode error information when the signature verification fails by the secure operating system. The security of microcode is ensured on the basis of a secure operating system safety environment to which a system layer is inaccessible. A cryptography tool measure is adopted, so that the security, integrity and correctness of loaded microcode are ensured, and the risk of breaking, modifying and replacing an existing microcode management mechanism is lowered.

A memory/multi-core concurrent memory allocation method, which is applied to an embedded system, wherein a kernel module and a plurality of application programs are provided. The memory allocation method comprises: acquiring first memory allocation requests of the plurality of application programs; the kernel module determining whether preset screening marks exist in the first memory allocation requests; when screening marks exist in the first memory allocation requests, prohibiting allocating memory for the current application program managed by a contiguous memory allocator. By adopting the memory allocation method, the application programs which occupy contiguous memory allocated by the continuous memory allocator for a long time can be screened and removed, then contiguous memory allocation can be provided for the drivers in a shorter time, and the corresponding contiguous continuous memory can be allocated for the drivers through a plurality of processing units at the same time with a higher efficiency.

The present invention provides a microcode signature security management system based on a Trustzone technology, and belongs to the field of data security storage. The microcode signature security management system comprises the steps of: starting a normal operating system after the hardware equipment is started; acquiring the signature-encrypted microcode file and outputting the signature-encrypted microcode file and a switching signal by the normal operating system; receiving the switching signal and starting the monitor mode by the microprocessor to start a secure operating system; receiving the signature-encrypted microcode file, performing signature verification on the signature-encrypted microcode file, loading the file when the signature verification passes, otherwise outputting microcode error information when the signature verification fails by the secure operating system. The present invention has beneficial effects that the security of microcode is ensured on the basis of a secure operating system (secure os) safety environment to which a system layer is inaccessible. A cryptography tool measure is adopted, so that the security, integrity and correctness of loaded microcode are ensured, and the risk of breaking, modifying and replacing an existing microcode management mechanism is lowered.

A method for releasing memory allocated by a contiguous memory allocator that merges a to-be-released memory page with an adjacent free page to form a memory block that can be released more efficiently than would be the case when releasing a series of un-merged memory pages.

A memory/multi-core concurrent memory allocation method, which is applied to an embedded system, wherein a kernel module and a plurality of application programs are provided. The memory allocation method comprises: acquiring first memory allocation requests of the plurality of application programs; the kernel module determining whether preset screening marks exist in the first memory allocation requests; when screening marks exist in the first memory allocation requests, prohibiting allocating memory for the current application program managed by a contiguous memory allocator. By adopting the memory allocation method, the application programs which occupy contiguous memory allocated by the continuous memory allocator for a long time can be screened and removed, then contiguous memory allocation can be provided for the drivers in a shorter time, and the corresponding contiguous continuous memory can be allocated for the drivers through a plurality of processing units at the same time with a higher efficiency.