Systems and methods for enhanced ROM access resiliency
View Patent ↗An information handling system may include at least one processor, a management controller, a serial peripheral interface (SPI) read-only memory (ROM), and at least one logic device. The management controller may be communicatively coupled to the at least one processor and configured to provide out-of-band management of the information handling system. The logic device may be configured to reset the SPI ROM in response to an indication that the SPI ROM is to be reset, and the resetting may include detaching the SPI ROM from a SPI controller, disconnecting a power source from the SPI ROM, in response to a passage of a particular amount of time, reconnecting the power source to the SPI ROM, and re-attaching the SPI ROM to the SPI controller.
1. An information handling system comprising:
at least one processor;
a management controller communicatively coupled to the at least one processor and configured to provide out-of-band management of the information handling system;
a serial peripheral interface (SPI) read-only memory (ROM); and
at least one logic device configured to reset the SPI ROM in response to an indication that the SPI ROM is to be reset, wherein the resetting includes:
causing a file system associated with the SPI ROM to be dismounted;
causing the SPI ROM to be detached from a SPI controller of the SPI ROM;
disconnecting a power source from the SPI ROM;
in response to a passage of a particular amount of time, reconnecting the power source to the SPI ROM;
causing the SPI ROM to be re-attached to the SPI controller of the SPI ROM; and
causing the file system associated with the SPI ROM to be remounted.
2. The information handling system of claim 1 , wherein the management controller comprises the SPI ROM.
3. The information handling system of claim 1 , wherein the resetting does not include resetting the SPI controller of the SPI ROM.
4. The information handling system of claim 1 , wherein the resetting does not include resetting the at least one processor.
5. The information handling system of claim 1 , wherein the logic device is a programmable logic device (PLD).
6. The information handling system of claim 1 , wherein the SPI ROM does not include an input for resetting the SPI ROM.
7. A method comprising:
receiving, at a logic device, an indication that a serial peripheral interface (SPI) read-only memory (ROM) is to be reset;
in response to the indication, the logic device causing a file system associated with the SPI ROM to be dismounted;
the logic device detaching the SPI ROM from a SPI controller of the SPI ROM;
the logic device disconnecting a power source from the SPI ROM;
the logic device waiting a particular amount of time;
the logic device reconnecting the power source to the SPI ROM;
the logic device re-attaching the SPI ROM to the SPI controller of the SPI ROM; and
the logic device causing the file system associated with the SPI ROM to be remounted.
8. The method of claim 7 , wherein the particular amount of time is at least 10 milliseconds.
9. The method of claim 7 , wherein the method does not include resetting the SPI controller of the SPI ROM.
10. The method of claim 7 , wherein the logic device is a complex programmable logic device (CPLD).
11. The method of claim 7 , further comprising causing a subsequent load of data from the SPI ROM to be delayed until after the file system is remounted.
12. A read-only memory (ROM) reliability controller comprising:
a programmable logic device (PLD) configured to be coupled to a management controller of an information handling system, the information handling system including at least one serial peripheral interface (SPI) ROM that includes a file system of the management controller, the management controller being configured to provide out-of-band management of the information handling system;
wherein the PLD is configured to reset the SPI ROM in response to an indication that the SPI ROM is to be reset, wherein the resetting includes:
causing the file system to be dismounted;
detaching the SPI ROM from a SPI controller of the SPI ROM;
disconnecting a power source from the SPI ROM;
in response to a passage of a particular amount of time, reconnecting the power source to the SPI ROM;
re-attaching the SPI ROM to the SPI controller of the SPI ROM; and
causing the file system to be remounted.
13. The ROM reliability controller of claim 12 , wherein the management controller comprises the SPI ROM.
14. The ROM reliability controller of claim 13 , wherein the resetting does not include resetting the management controller.
15. The ROM reliability controller of claim 12 , wherein the resetting does not include resetting the SPI controller of the SPI ROM.
16. The ROM reliability controller of claim 12 , wherein the SPI ROM is an electrically erasable programmable ROM (EEPROM).