CN107133129B - Method for realizing ARM platform to open FRB-2timer in BDK program stage - Google Patents

Abstract

Compared with the prior art, the method for opening the FRB-2timer of the ARM platform in the BDK program phase can open the FRB-2timer in the BDK program phase of the ARM platform so that the FRB-2timer can protect the whole startup phase of the ARM platform, and when the BDK program is in crash, the FRB-2timer can be remedied.

Description

Method for realizing ARM platform to open FRB-2timer in BDK program stage

Technical Field

The invention relates to the field of ARM platform server memories, in particular to a method for realizing that an ARM platform opens an FRB-2timer at a BDK program stage.

Background

In the special design of the ARM platform, a boot program is mainly divided into two parts, namely a BDK program and a UEFI BIOS program, the BDK program is executed firstly, and then the UEFI BIOS program is executed, wherein the UEFI BIOS program is divided into four stages of SEC, PEI, DXE and BDS according to the execution flow, and the X86 platform has no BDK program and only has the UEFI BIOS program. Generally, on an X86 platform, an FRB-2timer (watchdog, watchdog clock, mainly used for generating a probability of downtime in a boot stage, automatically restarting, and making a system try to enter the system next time) is opened by an IPMI command in UEFI BIOS, this ensures that the FRB-2timer protects substantially the entire boot-up phase, however, as the starting programs in the ARM platform are the BDK program and the UEFIBIOS program, and the BDK program is executed first, the BDK program basically occupies half of the starting time, therefore, it is necessary to turn on the FRB-2timer in the BDK program, so that when the BDK program goes down, FRB-2timer can remedy, but in current designs, the BDK program has not supported IPMI protocol, therefore, the BDK program has no way to send IPMI command to BMC to open FRB-2timer, and can only inform BMC by other means.

Disclosure of Invention

The invention provides a method for opening an FRB-2timer in a BDK program stage by an ARM platform.

The technical task of the invention is realized in the following way, the method is that two GPIOs on a CPU are connected with two GPIOs on a BMC, the GPIO of the CPU is output to be high level at the initial stage of starting the BDK program to execute, the BMC program thread polls the state of the GPIO at the BMC end, if the GPIO is pulled high, an FRB-2timer is opened, the two GPIOs on the CPU are pulled low at the rear stage of the BDK program, the levels of the two corresponding GPIOs at the BMC end are also lowered, and the BMC program thread closes the FRB-2 timer.

The GPIO of the CPU is set as an output end, and the GPIO on the BMC is set as an input end.

The specific operation steps are as follows:

step 1) two GPIO output ends are connected out from a CPU end, wherein the two GPIO output ends are GPIO11 and GPIO12 respectively and correspondingly connected into two GPIO input ends on a BMC respectively, and the two GPIO output ends are GPIO11 and GPIO12 respectively;

step 2) the BDK program sets the state values of GPIO11 and GPIO12 in the starting process, and outputs GPIO11 and GPIO12 of the CPU as high level;

step 3), the BMC polling program judges the state values of the GPIO11 and the GPIO 12;

step 4), the GPIO11 and the GPIO12 are both high, the FRB-2timer is opened, otherwise, the FRB-2timer is not opened;

step 5), the BDK program pulls down the levels of the GPIO11 and the GPIO12 on the CPU at the later stage, and the levels of the two corresponding GPIOs at the BMC end are also lowered;

step 6) the BMC poll procedure turns off FRB-2 timer.

Compared with the prior art, the method for opening the FRB-2timer of the ARM platform in the BDK program phase can open the FRB-2timer in the BDK program phase of the ARM platform, so that the FRB-2timer can protect the whole startup phase of the ARM platform, and the FRB-2timer can be remedied when the BDK program is in a shutdown phenomenon.

Drawings

FIG. 1 is a flow chart of an implementation method for opening an FRB-2timer in a BDK program phase by an ARM platform.

FIG. 2 is a connection diagram of the CPU and the BMC.

Detailed Description

Example 1:

the method for opening the FRB-2timer in the BDK program phase of the ARM platform is that two GPIOs on a CPU are connected with two GPIOs on a BMC, the GPIO of the CPU is set as an output end, and the GPIO on the BMC is set as an input end; in the initial stage of starting up the BDK program and starting execution, the GPIO output of the CPU is in a high level, the BMC program thread polls the state of the GPIO at the BMC end, the FRB-2timer is opened when the fact that the GPIO is pulled high is found, the two GPIOs on the CPU are pulled low in the rear stage of the BDK program, the levels of the two corresponding GPIOs at the BMC end can be lowered, and the BMC program thread closes the FRB-2 timer.

Example 2:

the method for opening the FRB-2timer in the BDK program phase by the ARM platform comprises the following specific operation steps:

step 1) two GPIO output ends are connected out from a CPU end, wherein the two GPIO output ends are GPIO11 and GPIO12 respectively and correspondingly connected into two GPIO input ends on a BMC respectively, and the two GPIO output ends are GPIO11 and GPIO12 respectively;

step 2) the BDK program sets the state values of GPIO11 and GPIO12 in the starting process, and outputs GPIO11 and GPIO12 of the CPU as high level;

step 3), the BMC polling program judges the state values of the GPIO11 and the GPIO 12;

step 4), the GPIO11 and the GPIO12 are both high, the FRB-2timer is opened, otherwise, the FRB-2timer is not opened;

step 5), the BDK program pulls down the levels of the GPIO11 and the GPIO12 on the CPU at the later stage, and the levels of the two corresponding GPIOs at the BMC end are also lowered;

step 6) the BMC poll procedure turns off FRB-2 timer.

The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.

Claims (2)

1. A realization method for opening an FRB-2timer by an ARM platform in a BDK program phase is characterized in that two GPIOs on a CPU are connected with two GPIOs on a BMC, the GPIOs of the CPU are output to be high level in the initial stage of starting the BDK program to be executed, the BMC program thread polls the state of the GPIO at the BMC end, the FRB-2timer is opened when the GPIO is pulled high, the two GPIOs on the CPU are pulled low in the rear stage of the BDK program, the levels of the two corresponding GPIOs at the BMC end are also lowered, and the BMC program thread closes the FRB-2 timer;

the specific operation steps are as follows:

step 1) two GPIO output ends are connected out from a CPU end, wherein the two GPIO output ends are GPIO11 and GPIO12 respectively and correspondingly connected into two GPIO input ends on a BMC respectively, and the two GPIO output ends are GPIO11 and GPIO12 respectively;

step 2) the BDK program sets the state values of GPIO11 and GPIO12 in the starting process, and outputs GPIO11 and GPIO12 of the CPU as high level;

step 3), the BMC polling program judges the state values of the GPIO11 and the GPIO 12;

step 4), the GPIO11 and the GPIO12 are both high, the FRB-2timer is opened, otherwise, the FRB-2timer is not opened;

step 5), the BDK program pulls down the levels of the GPIO11 and the GPIO12 on the CPU at the later stage, and the levels of the two corresponding GPIOs at the BMC end are also lowered;

step 6) the BMC poll procedure turns off FRB-2 timer.

2. The method of claim 1, wherein the GPIO of the CPU is set as an output terminal and the GPIO of the BMC is set as an input terminal.

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