Boot Flash Backup Recovery; Figure 4-4 Boot Prom Backup Recovery; Table 4-2 Boot Prom Backup Recovery Operation - SMART Embedded Computing ATCA-F125 Assembly, Installation And Use

4.6.1

Boot Flash Backup Recovery

By default, the payload processor boots from the Boot Flash device #1. An IPMI OEM
command can be used to send a message to the IPMC to change the boot device. The
IPMC provides an IPMI sensor to control the signal BOOT_SELECT. If the BOOT_SELECT
signal is set high, the payload processor will boot from Boot Flash device #2 after reset.
The boot device from which the service processor has booted (active bank) is write
protected and cannot be reprogrammed, whereas the redundant boot device can be erased
and reprogrammed.

Figure 4-4 Boot PROM Backup Recovery

Table 4-2
Boot Select Chip Select Mapping
Low
High
ATCA-F125 (6873M Artwork) Installation and Use (6806800J94P)
Boot PROM Backup Recovery Operation
BOOT_FLASH_1_N = CS0_N
BOOT_FLASH_2_N = CS1_N
BOOT_FLASH_1_N = CS1_N
BOOT_FLASH_2_N = CS0_N
Functional Description
Boot Device Erase Protection
Flash #1 = Yes
Boot Flash #1
Flash #2 = No. Upgrade
enabled
Boot Flash #1 = No. Upgrade
Enabled
Boot Flash #2
Flash #2 = Yes
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