Chapter 4
Utilities
EFI/POSSE Commands
39
baud
Sets the baud rate and communication settings for a UART.
Syntax
baud <index> <baudrate>
Parameters
<index> 0 through the total number of UARTS minus one
<baudrate> baud rate.
Operation
This command is used to change the speed for a UART in the system. This command works for all UARTs
visible to EFI/POSSE. If the UART is part of PDH space and is initialized by the core firmware, this command
communicates the settings to core firmware so the UART can be initialized with the new settings on the next
boot. System default is 9600 baud.
Other Communication parameters are listed in Table 4-2.
boottest
Interacts with the speedy boot variable allowing it to be set appropriately.
Syntax
boottest Displays status of all speedy boot bits
boottest on Run all tests (for a normal boot time)
boottest off Skip all tests (for a faster boot time)
boottest [test] Displays status of specific Speedy Boot bit
boottest [test] [on|off] Sets or clears a specific Speedy Boot bit
Parameters
[test] Each test can be set or cleared:
booting_valid Enable/disable system firmware response to BOOTING
bit. If OS Speedy Boot aware set to on.
early_cpu Enable/disable early CPU selftests.
late_cpu Enable/disable late CPU selftests.
platform Enable/disable system board hardware tests.
chipset Enable/disable CEC tests.
Table 4-2 Communications Parameters
Parameter Value
RECEIVE_FIFO_DEPTH 1
TIMEOUT 1000000
PARITY No parity
DATA_BITS 8
STOP_BITS 1
CONTROL_MASK 0
To Next Page
Loading...
Need help?
General