Hi, I am using MVista IXDP2400 preview kit on a Radisys board (IXP2400). The board has DRAM at 0x0x00000000-0x10000000 (256M). SRAM Channel 0 (4M) : 0x80000000-0x80400000 SRAM Channel 1 (4M) : 0x90000000-0x90400000 When I boot linux, it can be seen that the kernel is loaded into 0xc0000000 and its alloted a total of 64M in DRAM space. I could not see SRAM at all. To enable SRAM I passed mem=64M mem=4M@0x80000000 in the command line. After compiling the image and loading it I could see that the kernel has 68M but before the root file system could be enabled many of the ioremaps (used by network driver like eepro100) are failing. This failures result in the inability to activate some PCI devices (network card) and thus cannot load the root file system over NFS. Here are the console logs. I have marked some relevant messages by ^^^^^^ Memstart: c000000 Memsize: 4000000 ^^^^^^^^^^^^^^^^^^ Node: 0 Memstart: 80000000 Memsize: 400000 ^^^^^^^^^^^^^^^^^^ Node: 0 On node 0 totalpages: 17408 zone(0): 476160 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: console=ttyS0,57600 ip=bootp root=nfs nohalt mem=64M mem=40 rtsched version <20030619.1708.46> Calibrating delay loop... 599.65 BogoMIPS Memory: 64MB 4MB = 68MB total ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Memory: 62812KB available (1168K code, 237K data, 196K init) XScale Cache/TLB Locking Copyright(c) 2001 MontaVista Software, Inc. XScale cache_lock_init called Calling consistent alloc low_level_page initialized low_level_page @ 0xf4800000 icache_lock_fn @ 0xf4800080 dcache_lock_fn @ 0xf48000a0 icache_unlock_fn @ 0xf4800098 dcache_unlock_fn @ 0xf48000f0 Initializing TLB locking TLB locking initialized Dentry-cache hash table entries: 16384 (order: 5, 131072 bytes) Inode-cache hash table entries: 8192 (order: 4, 65536 bytes) Mount-cache hash table entries: 2048 (order: 2, 16384 bytes) Buffer-cache hash table entries: 4096 (order: 2, 16384 bytes) Page-cache hash table entries: 32768 (order: 5, 131072 bytes) POSIX conformance testing by UNIFIX Scanning bus 00 Found 00:00 [8086/9001] 000b40 00 Found 00:08 [8086/b555] 000680 00 Found 00:20 [104c/ac28] 000604 01 Fixups for bus 00 PCI: bus0: Fast back to back transfers enabled Scanning behind PCI bridge 00:04.0, config 010100, pass 0 Scanning bus 01 Found 01:00 [8086/1229] 000200 00 Fixups for bus 01 PCI: bus1: Fast back to back transfers enabled Bus scan for 01 returning with max=01 Scanning behind PCI bridge 00:04.0, config 010100, pass 1 Bus scan for 00 returning with max=01 Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket Starting kswapd Disabling the Out Of Memory Killer devfs: v1.10 (20020120) Richard Gooch (rgooch@atnf.csiro.au) devfs: boot_options: 0x1 JFFS2 version 2.1. (C) 2001, 2002 Red Hat, Inc., designed by Axis Communication. Failed to allocate 401728 bytes for deflate workspace JFFS2 error: Failed to initialise zlib workspaces i2c-core.o: i2c core module version 2.6.2 (20011118) i2c-dev.o: i2c /dev entries driver module version 2.6.2 (20011118) i2c-algo-bit.o: i2c bit algorithm module version 2.6.2 (20011118) pty: 256 Unix98 ptys configured Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI ed ttyS00 at 0xfaffb003 (irq = 2) is a XScale UART pci_window_address = 0x00000000 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ixpctl: unable to __ioremap PCI memory region ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ block: 128 slots per queue, batch=32 RAMDISK driver initialized: 16 RAM disks of 16384K size 1024 blocksize loop: loaded (max 8 devices) eepro100.c:v1.09j-t 9/29/99 Donald Becker http://www.scyld.com/network/eepro100l eepro100.c: $Revision: 1.2 $ 2000/11/17 Modified by Andrey V. Savochkin