System and method for providing dynamic configuration ROM using double image buffers

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing active and update configuration ROM images associated with said local node;
• modifying said update ROM image;
• switch state of each said active and update configuration ROM images so that said active ROM image is the update image, and said update image is then the active image;
• publishing configuration ROM information of said local node from the then-active configuration ROM image;
• and
• indicating that the state of a bus associated with said local node has changed.

A method of dynamic configuration ROM in a local node comprising:

• providing active and update configuration ROM images associated with said local node;
• modifying said update ROM image;
• switch state of each said active and update configuration ROM images so that said active ROM image is the update image, and said update image is then the active image;
• publishing configuration ROM information of said local node from the then-active configuration ROM image;
• and
• indicating that the state of a bus associated with said local node has changed.

In a local node device, a dynamic configuration ROM comprising:

• first and second configuration ROM images, each of said images having configuration ROM entries, one of said configuration ROM images set as active, the other configuration ROM image set as update;
• publishing routines configured to publish said configuration ROM entries from said active ROM image, said publishing routines further comprising:
• at least one routine to switch the state of each said configuration ROM images;
• and
• at least one routine to activate a bus reset;
• and
• services to provide modifications to said update ROM image.

A network node device, comprising:

• first and second configuration ROM images, each of said images having configuration ROM entries, one of said configuration ROM images set as active, the other configuration ROM image set as update;
• publishing routines configured to publish said configuration ROM entries from said active ROM image, said publishing routines further comprising:
• at least one routine to switch the state of each said configuration ROM images;
• and
• at least one routine to activate a bus reset;
• and
• services to provide modifications to said update ROM image.

In a local node device, a dynamic configuration ROM comprising:

• a) first and second configuration ROM images, each of said images having configuration ROM entries, one of said configuration ROM images set as active, the other configuration ROM image set as update;
• b) publishing routines to publish said configuration ROM entries from said active ROM image;
• c) a first apparatus adapted to provide modifications to the configuration ROM image set as update;
• and
• d) services to provide modifications to said update ROM image, said publishing routines further comprising:
• i) routines to switch state of each said configuration ROM images;
• and
• ii) routines to activate a bus reset.

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing first and second configuration ROM images within said local node;
• setting said first configuration ROM image to “active”;
• setting said second configuration ROM image to “update”;
• publishing configuration ROM information of said local node from said “active” configuration ROM image;
• providing modifications to said “update” configuration ROM image;
• switching the state of each said configuration ROM images;
• and
• republishing said configuration ROM from said “active” configuration ROM image.

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing first and second configuration ROM images within said local node;
• setting said first configuration ROM image to “active”;
• setting said second configuration ROM image to “update”;
• publishing configuration ROM information of said local node from said “active” configuration ROM image;
• providing modifications to said “update” configuration ROM image by at least storing modifications into a database, and constructing said “update” configuration ROM image from said database;
• and
• switching the state of each said configuration ROM images.

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing first and second configuration ROM images within said local node;
• setting said first configuration ROM image to “active”;
• setting said second configuration ROM image to “update”;
• publishing configuration ROM information of said local node from said “active” configuration ROM image;
• providing modifications to said “update” configuration ROM image;
• and
• switching the state of each said configuration ROM images by at least setting the current “active” configuration ROM image to “update”, and setting the current “update” configuration ROM image to “active”.

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing first and second configuration ROM images within said local node;
• setting said first configuration ROM image to “active”;
• setting said second configuration ROM image to “update”;
• publishing configuration ROM information of said local node from said “active” configuration ROM image;
• providing modifications to said “update” configuration ROM image;
• initiating a bus reset;
• and
• republishing said configuration ROM of said local node from said “active” configuration ROM image.

A computer-readable medium containing instructions, which when executed by a computer, provide a dynamic configuration ROM in a local node by:

• providing first and second configuration ROM images within said local node;
• setting said first configuration ROM image to “active”;
• setting said second configuration ROM image to “update”;
• publishing configuration ROM information of said local node from said “active” configuration ROM image;
• providing modifications to said “update” configuration ROM image by at least storing modifications into a database, and constructing said “update” configuration ROM image from said database;
• and
• initiating a bus reset.