Method for displaying SMP (Symmetric Multi-Processing) function of godson CPUs (Central Processing Units)
A CPU core, Loongson technology, applied in the field of Loongson motherboard function display
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[0017] Each Loongson CPU contains four cores, which can be used as AP CPU or BSP CPU. Each core can be masked through the program, but in the case of single-channel, there must be a core as the BSP CPU; in the case of dual-channel, there must be a core on CPU No. 0 as the BSP CPU. Otherwise, each core is either shielded, or waits for the BSP CPU to wake up in a loop, and the BIOS program cannot continue to execute. By setting the BIOS and Linux kernel programs used by blades and motherboards, single CPU 1, 2, 3, 4 core functions, dual CPU 1, 2, 3, 4, 5, 6, 7, 8 core functions can be realized.
[0018] By detecting the CPU number and the core number of the CPU in the BIOS, the position and number of cores to be started in the CPU can be controlled. The EBase register contained in the No. 0 coprocessor inside each core is used to indicate the processor number in a multi-core system. The lowest two bits of the register, that is, bits 0 and 1 indicate the core number of the CPU,...
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