Hi there! I hope this helps... First of all, a coleague managed to make a 850FADS board work properly, so the credit is his. We're using PPCBoot 1.2 and kernel-2.4.20pre1. The first thing is to make sure that the ppcboot environment variable "clocks_in_mhz" IS NOT DEFINED. It would NOT exist, not be defined as 0 or 1. It changes the clock dividers in the processor that is not good. This should make the kernel boot at least with a ramdisk. If you have trouble to make the ethernet interface work, as we did, you should edit the include/asm-ppc/commproc.h and arch/ppc/platforms/fads.h files. In the first file, you should add the following:
/*** FADS ********************************************************/ #ifdef CONFIG_FADS /* This ENET stuff is for the MPC850SAR with ethernet on SCC2. Some of * this may be unique to the FADS850SAR configuration. * Note TENA is on Port B. */ #define PA_ENET_RXD ((ushort)0x0004) /* PA 13 */ #define PA_ENET_TXD ((ushort)0x0008) /* PA 12 */ #define PA_ENET_RCLK ((ushort)0x0200) /* PA 6 */ #define PA_ENET_TCLK ((ushort)0x0800) /* PA 4 */ #define PB_ENET_TENA ((uint)0x00002000) /* PB 18 */ #define PC_ENET_CLSN ((ushort)0x0040) /* PC 9 */ #define PC_ENET_RENA ((ushort)0x0080) /* PC 8 */ #define SICR_ENET_MASK ((uint)0x0000ff00) #define SICR_ENET_CLKRT ((uint)0x00002f00) /* RCLK-CLK2, TCLK-CLK4 */ #endif /* CONFIG_FADS */ It should be put together with the other boards' definitions. The fads.h file shoud be edited in these definitions: < /*** defines taken from PPCBoot 1.2 ***/ < #define BCSR_ADDR ((uint) 0x02100000) < #define BCSR_SIZE ((uint)(64 * 1024)) < #define BCSR0 ((uint) (BCSR_ADDR + 00)) < #define BCSR1 ((uint) (BCSR_ADDR + 0x04)) < #define BCSR2 ((uint) (BCSR_ADDR + 0x08)) < #define BCSR3 ((uint) (BCSR_ADDR + 0x0c)) < #define BCSR4 ((uint) (BCSR_ADDR + 0x10)) < /*** ***/ That should do the trick. Again, we are using a FADS850SAR board, which is not the same you have, but the spirit of the whole thing is to take the info from a working ppcboot to the kernel. Hope it helps. -- "All things are ready, if our minds be so" The Life Of King Henry V - William Sharespeare Leonardo Pereira Santos Engenheiro de Projetos PD3 Tecnologia av. Par? 330/202 (51) 3337 1237 ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
