# Message Bridging note

## Prerequisite
* [Source Codes Diagram and Unified Modeling Language](http://wiki.insyde.com/index.php/Source_Codes_Diagram_and_Unified_Modeling_Language)

* [Supervyse 3.x Coding Standard](http://wiki.insyde.com/index.php/Supervyse_3.x_Coding_Standard)

## Concept and Flow
### ipmid Init Flow


* platformInit
* loads the config.xml and create PIA data.
* [Load config file](http://wiki.insyde.com/index.php/Load_config_file)
* CHECKPOINT_TASKS_RUN flag
* 尚不清楚 CheckpointWait() 背後的運作機制
### channel initial flow


### Example
* SMS Channel

* SMM Channel

* IPMB Channel Command Request and Response

### Channel Command Handle Flow

* CMDProcessor() [參照 SMS 圖之右側] will look up IPMI command table for command handler to execute then send back IPMI command response.

## [Add A New Channel](http://wiki.insyde.com/index.php/How_To_Add_A_New_Channel)

## [Configure Channels](http://wiki.insyde.com/index.php/How_To_Configure_Channels)

## Source Code Overview
### Data Struture

typedef struct {
    SChannelMethods *psMethods;  // pointer to channel type specific methods
    SChannelData *psData;        // pointer to channel specific data
} SChannel;

SChannel g_sChannels[MAX_CHANNELS]

* Channel method (列出目前熟悉的部分)
* pInitialize
* pBridgeReq
* pBridgeRsp
* pRespondTo (HAL)

## Tool (尚未動手)
* [Remote Debug with gdb](http://wiki.insyde.com/index.php/Supervyse_Remote_Debug_with_gdb_Setting_Guide)
* [Firmware Runtime Debug](http://wiki.insyde.com/index.php/Supervyse_3.0_Firmware_Runtime_Debug#Shared_Memory)

## 待研究
*　[Timers](http://wiki.insyde.com/index.php/Insyde_BMC_ipmid_OS_System_Timers#Timers_Functions)
*　[System Event Subsystem](http://wiki.insyde.com/index.php/Insyde_BMC_ipmid_System_Event_Subsystem#Related_Links)