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Jin, Huang
33 lines
1.2 KiB
ReStructuredText
Executable File
33 lines
1.2 KiB
ReStructuredText
Executable File
Shell Interface
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|SPN| comes with an built-in shell interface for diagnosis and debugging purpose. It allows one to examine platform state (e.g., dump memory content, PCI configuration registers, etc.), change boot configuration and trouble shoot before launching OS.
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Developers can also add their own shell commands for unit testing.
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To enter shell interface, press any key after reboot and before OS is launched.
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Built-in shell commands::
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Shell> help
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exit - Exit the shell
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help - List supported commands
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hob - List HOBs
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mem - Read or write system memory
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mmap - Display memory map
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perf - Display performance data
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boot - Print or modify the OS boot option list
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cpuid - Read CPU specific information
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io - Read or write I/O ports
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msr - Read or write model specific registers
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mtrr - Display current MTRR configuration
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pci - Display PCI devices
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reset - Reset the system
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ucode - Display microcode version
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fwupdate - Initiate Firmware Update
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Use '-h' to get help message for a command.
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.. note:: For small image footprint or security reasons, one can exclude shell module from |SPN| in release builds.
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