Get Channel Access 命令详情

更新时间：2025/06/26

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修订记录

openUBMC版本号	修订日期	修订人	修订内容
25.06	2025/06/26	pengqiang-gs	初稿，新增命令详情

基本信息

功能说明

标准命令，获取通道的访问属性。 This command is used to return whether a given channel is enabled or disabled, whether alerting is enabled or disabled for the entire channel, and under what system modes the channel can be accessed.

权限

ReadOnly

命令信息

请求信息

字节顺序	域取值说明
1	[7:4] - reserved [3:0] - Channel number
2	[7:6] - 00b = reserved 01b = get non-volatile Channel Access 10b = get present volatile (active) setting of Channel Access 11b = reserved [5:0] - reserved

响应信息

字节顺序	域取值说明
1	Completion Code, generic, plus following command-specific completion codes: 82h = set not supported on selected channel (e.g. channel is sessionless.)
2	[7:6] - reserved [5] 0b = Alerting enabled 1b = Alerting disabled [4] - Per-message Authentication Enable/Disable. This bit is unspecified for channels (e.g. serial/modem) that do not support Per-message Authentication. 0b = per message authentication enabled 1b = per message authentication disabled [3] - User Level Authentication Enable 0b = User Level Authentication enabled. 1b = User Level Authentication disabled. [2:0] - Access Mode 0h = disabled channel disabled for communication 1h = pre-boot only channel only available when system is in a powered down state or in BIOS prior to start of boot. 2h = always available channel always available for communication regardless of system mode. BIOS typically dedicates the serial connection to the BMC. 3h = shared same as always available, but BIOS typically leaves the serial port available for software use.
3	Channel Privilege Level Limit. This value returns the maximum privilege level that can be accepted on the specified channel. [7:4] - reserved [3:0] - Channel Privilege Level Limit 0h = reserved 1h = CALLBACK level 2h = USER level 3h = OPERATOR level 4h = ADMINISTRATOR level 5h = OEM Proprietary level

命令样例

样例1：获取通道1的访问属性

请求：
响应：

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