Cp308-Specific Registers; Status Register 0 (Stat0) - Kontron CP308 User Manual

Configuration
4.3

CP308-Specific Registers

The following registers are special registers which the CP308 uses to watch the onboard
hardware special features and a number of CompactPCI control signals.
Normally, only the system uEFI BIOS uses these registers, but they are documented here for
application use as required.
Note ...
Take care when modifying the contents of these registers as the system uEFI
BIOS may be relying on the state of the bits under its control.
4.3.1

Status Register 0 (STAT0)

The Status Register 0 holds general/common status information.
Table 4-4:

Status Register 0 (STAT0)

REGISTER NAME
ADDRESS
BIT NAME
7 Res. Reserved
6 BBEI uEFI BIOS boot end indication:
0 = uEFI BIOS is booting
1 = uEFI BIOS boot is finished
5 - 4 BFSS Boot Flash selection status:
00 = Primary boot Flash active
01 = Secondary boot Flash active
10 = External boot Flash active
11 = Reserved
3 DIP4 DIP switch SW1, switch 4 (PCB index 01: reset configuration / PCB
index 00: reserved):
0 = Switch on
1 = Switch off
2 DIP3 DIP switch SW1, switch 3 (Reserved):
0 = Switch on
1 = Switch off
1 DIP1 DIP switch SW1, switch 2 (Clear the uEFI BIOS settings):
0 = Switch on
1 = Switch off
0 DIP0 DIP switch SW1, switch 1 (Select SPI Flash):
0 = Switch on
1 = Switch off
Page 4 - 6
STATUS REGISTER 0 (STAT0)
0x280
DESCRIPTION
CP308
RESET
ACCESS
VALUE
0 R
0 R
00 R
N/A R
N/A R
N/A R
N/A R
ID 1027-4487, Rev. 3.0