System and method for intelligent platform management interface keyboard controller style interface multiplexing

1. An information handling system comprising:

a first processor core;

a first input/output (I/O) module coupled to the first processor core via a first direct media interface; and

a service processor coupled to the first I/O module via a multi-master interface;

wherein the first processor core sends a first low pin count (LPC) transaction for the service processor via the first direct media interface and the multi-master interface, such that the first LPC transaction is not transmitted via an LPC bus;

wherein the first LPC transaction is intercepted by a first I/O trap of the first I/O module;

wherein the first I/O module is operable to generate a first system management interrupt in response to the first LPC transaction being intercepted by the first I/O trap;

wherein the first system management interrupt is received by a first system management interrupt handler of the first processor core; and

the first system management interrupt handler redirects the first transaction to the first direct media interface.

2. The information handling system of claim 1 , further comprising:

a second processor core; and

a second input/output (I/O) module coupled to the first processor core via a second direct media interface;

wherein:

the service processor is coupled to the second I/O module via the multi-master interface; and

the second processor core sends a second LPC transaction for the service processor via the second direct media interface and the multi-master interface.

3. The information handling system of claim 2 , wherein:

the second LPC transaction is intercepted by a second I/O trap of the second I/O module, such that the second LPC transaction is not transmitted via the LPC bus;

the second I/O module is operable to generate a second system management interrupt in response to the second LPC transaction being intercepted by the second I/O trap; and

the second system management interrupt is received by a second system management interrupt handler of the second processor core; and

the second system management interrupt handler redirects the second transaction to the second direct media interface.

4. The information handling system of claim 1 , wherein the first LPC transaction is generated by a first keyboard control style handler associated with the first processor core.

5. The information handling system of claim 4 , wherein the first LPC transaction is received by a second keyboard control style handler associated with the service processor.

6. The information handling system of claim 1 , further comprising:

a system-on-a-chip device that includes the processor core, the I/O module, and the first direct media interface.

7. A method comprising:

receiving, at a first processor core, a first low pin count (LPC) transaction a first processor core;

sending the first LPC transaction for a service processor via a first direct media interface between the first processor core and a first input/output (I/O) module, and via a multi-master interface between the first I/O module and the service processor, such that the first LPC transaction is not transmitted via an LPC bus;

receiving the first LPC transaction at the first I/O module;

intercepting the first LPC transaction by a first I/O trap of the first I/O module;

generating a first system management interrupt in response to the first LPC transaction being intercepted by the first I/O trap;

receiving, by a first system management interrupt handler of the first processor core, the first system management interrupt; and

redirecting, by the first system management interrupt handler, the first transaction to the first direct media interface.

8. The method of claim 7 , further comprising:

receiving, at a second processor core, a second LPC transaction; and

sending the second LPC transaction for the service processor via a second direct media interface between the second processor core and a second I/O module, and via the multi-master interface to the service processor.

9. The method of claim 8 , further comprising:

receiving the second LPC transaction at the second I/O module;

intercepting the second LPC transaction by a second I/O trap of the second I/O module, such that the second LPC transaction is not transmitted via an LPC bus;

generating a second system management interrupt in response to the second LPC transaction being intercepted by the second I/O trap;

receiving, by a second system management interrupt handler of the second processor core, the second system management interrupt; and

redirecting, by the second system management interrupt handler, the second transaction to the second direct media interface.

10. The method of claim 7 , wherein the first LPC transaction is generated by a first keyboard control style handler associated with the first processor core.

11. The method of claim 10 , wherein the first LPC transaction is received by a second keyboard control style handler associated with the service processor.

12. A non-transitory computer-readable medium including code for carrying out a method, the method comprising:

receiving, at a first processor core, a first low pin count (LPC) transaction;

sending the first LPC transaction for a service processor via a first direct media interface between the first processor core and a first input/output (I/O) module, and via a multi-master interface between the first I/O module and the service processor, such that the first LPC transaction is not transmitted via an LPC bus;

receiving the first LPC transaction at the first I/O module;

intercepting the first LPC transaction by a first I/O trap of the first I/O module;

generating a first system management interrupt in response to the first LPC transaction being intercepted by the first I/O trap

receiving, by a first system management interrupt handler of the first processor core, the first system management interrupt; and

redirecting, by the first system management interrupt handler, the first transaction to the first direct media interface.