As Scott describes correctly the preferred method of booting ML300 is through System ACE CF. System ACE CF reads ACE files and programs the FPGA and the PowerPC processor through the JTAG chain.
The ACE file is a concatenation of zero or one bitstream with zero to n ELF files. Typically, it is one bitstream and one ELF file. On power-up or reset System ACE CF reads the ACE file from the MicroDrive or CompactFlash card and in a first step programs the FPGA. Then, in a second step, from the same ACE file, it programs the processor, i.e. similar to an external debugger it loads code and data contained in the ELF file into the processor memories, sets the PC to the start address, and starts executing the program. For Linux, you will use the Linux kernel as the ELF file. You can generate ACE files easily by using EDK by running the command $ xmd genace.tcl implementation/system.bit arch/ppc/boot/images/zImage.embedded top.ace in your hardware project directory. - Peter ----- Some useful links: System ACE CF: (http://www.xilinx.com/isp/systemace/systemacecf.htm EDK: http://www.xilinx.com/edk ML300: http://www.xilinx.com/ml300 Scott Anderson wrote: > On Monday, June 2, 2003, at 01:48 PM, Kerl, John wrote: > > You're saying that the entire zvmlinux.initrd file > > (2-3 MB, say) is contained in the FPGA bitstream?? > > I am saying that the entire zImage.embedded (without > an initrd) is in the FPGA bitstream. Its root partition > is an ext2 partition on the IBM MicroDrive. > > Scott > ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/