2.4 Secure Boot Mode
C29x supply Secure Boot mode to protect customer system. The customer can put
secured encoded u-boot and other image into flash, and put the secure key into C29x
silicon. If secured keys are matched, the image can be loaded and run. The secure boot
mode can be enabled by setting SW7[6] to ON and cfg_sb_dis to 0.
The secure boot mode can be started from the PCIe endpoint mode and standalone host
mode.
To start the secure boot mode from the PCIe endpoint mode, connect J15 and J16 (pin 1
and pin 2). The board will now support secure boot from NOR flash, NAND flash, or SPI
EEPROM.
To start the secure boot mode from the standalone host mode, connect J16 (pin 1 and pin
2), and install the battery. The board will now support secure boot from NOR flash,
NAND flash, or SPI EEPROM.
Following are the device configurations required for this use case by setting DIP switch:
•
SW7[6] = ON, cfg_sb_dis=0
The table below lists the secure boot POR settings example in NOR flash boot mode (800
MHz core, 800 MHz DDR, PCIe-x4 agent).
Table 2-3. Secure POR settings
SW4[1..8]
0101 1000
ON OFF ON OFF OFF ON ON ON
SW5[1..8]
1111 1000
OFF OFF OFF OFF OFF ON ON ON
SW6[1..8]
0000 1111
ON ON ON ON OFF OFF OFF OFF
SW7[1..8]
0001 0011
ON ON ON OFF ON ON OFF OFF
SW8[1..8]
0000 1011
ON ON ON ON OFF ON OFF OFF
Chapter 2 PCIe Use Cases
C29x PCIe Card User Guide, Rev. 0, 10/2013
Freescale Semiconductor, Inc.
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