Hi all,

sorry for the probably OT question but I hope to find here the experts at booting the linux kernel. I've got a proprietary board with MPC8280 and U-Boot 1.1.1. If I boot the kernel (2.4.24 from ELDK3.0), it crashes in m8260_init_IRQ. I guess there is the first access to IMMR area which launches a "Data store translation miss" exception. The BAT registers seem to be missconfigured.

It would be fine if anyone could point me to 1. where the kernel configures the BAT registers and 2. where I can read about how the kernel uses the MMU.

Thanks in advance, Oliver

some additional info:

IMMR: 0F000000

BAT registers: DBAT0U F0001FFE BEPI F0000000 BL 00001FFC Vs 1 Vp 0 DBAT0L F000002A BRPN 00007800 WIMG _I_G PP read/write DBAT1U E0001FFE BEPI E0000000 BL 00001FFC Vs 1 Vp 0 DBAT1L E000002A BRPN 00007000 WIMG _I_G PP read/write DBAT2U C00007FE BEPI C0000000 BL 000007FC Vs 1 Vp 0 DBAT2L 00000002 BRPN 00000000 WIMG ____ PP read/write

What are DBAT0/1x good for?