Generalized boot operation for disaggregated, multiple (multi-) die computing systems, and related methods

A method of performing a boot-up operation for discovered subsidiary dies in a computing system, comprising;

• receiving a boot-up signal in the computing system;
• in response to the received boot-up signal, for each subsidiary die indicator of a plurality of subsidiary die indicators, a boot-up processor in a primary die:
• requesting a discovery page for a subsidiary die of a plurality of subsidiary dies identified by a subsidiary die indicator over a discovery bus coupled to the primary die and the plurality of subsidiary dies;
• determining the discovery page of the identified subsidiary die received over the discovery bus;
• in response to the discovery page of the identified subsidiary die being received over the discovery bus:
• requesting a link configuration page for one or more communication link coupled to the identified subsidiary die over the discovery bus;
• receiving the link configuration page for the identified subsidiary die over the discovery bus;
• and
• initializing the one or more communication links coupled to the identified subsidiary die based on the received link configuration page;
• and
• communicating requests with each of the plurality of subsidiary dies over at least one communication link of their respective coupled one or more communication links.

A non-transitory computer-readable medium having stored thereon computer executable instructions which, when executed by a processor in a primary die in a computing system, cause the processor to perform a boot-up operation for discovered subsidiary dies in the computing system, by causing the processor to:

• receive a boot-up signal;
• in response to the received boot-up signal, for each subsidiary die indicator of a plurality of subsidiary die indicators:
• request a discovery page for a subsidiary die of a plurality of subsidiary dies coupled to one or more communication links identified by a subsidiary die indicator over a discovery bus communicatively coupled to the primary die and the plurality of subsidiary dies;
• receive the discovery page of the identified subsidiary die received over the discovery bus;
• and
• in response to the discovery page of the identified subsidiary die being received over the discovery bus:
• request a link configuration page for the one or more communication links coupled to the identified subsidiary die over the discovery bus;
• receive the link configuration page for the identified subsidiary die over the discovery bus;
• and
• initialize the one or more communication links coupled to the identified subsidiary die based on the received link configuration page;
• and
• communicate requests with each of the plurality of subsidiary dies over at least one communication link of their respective coupled one or more communication links.