Hi, I have a board with 405GPr and 128MB SDRAM. When booting linuxppc 2.4.20 with the "mem=64m" parameter, it works fine. When booting without "mem=64m", it will hang at running init. In real mode, all 128MB SDRAM could be accessed without problems. With "mem=64m", if I use "ioremap" to remap the upper 64MB (0x04000000-0x07FFFFFF), the kernel could access that memory region without problems.
What is the problem ? Please help. Linux version 2.4.20 (root at carl.home.net) (gcc version 2.95.3 20010315 (release)) #199 1 18 16:22:13 CST 2003 On node 0 totalpages: 32768 zone(0): 32768 pages. zone(1): 0 pages. zone(2): 0 pages. Kernel command line: root=/dev/ram Calibrating delay loop... 332.59 BogoMIPS Memory: 123336k available (1284k kernel code, 568k data, 88k init, 0k highmem) 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: 8192 (order: 3, 32768 bytes) Page-cache hash table entries: 32768 (order: 5, 131072 bytes) POSIX conformance testing by UNIFIX PCI: Probing PCI hardware Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Initializing RT netlink socket OCP uart ver 1.6.2 init complete Starting kswapd devfs: v1.12c (20020818) Richard Gooch (rgooch at atnf.csiro.au) devfs: boot_options: 0x1 i2c-core.o: i2c core module i2c-dev.o: i2c /dev entries driver module i2c-core.o: driver i2c-dev dummy driver registered. i2c-proc.o version 2.6.1 (20010825) pty: 256 Unix98 ptys configured Found 2x16bit 16MByte CFI flash device of type Intel/Sharp extended at FF000000 Registered flash device /dev/flasha (minor 0, 4 partitions) Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ SERIAL_PCI en abled ttyS0 at 0xef600300 (irq = 0) is a 16550A ttyS1 at 0xef600400 (irq = 1) is a 16550A PPC 405 watchdog driver v0.6 IBM gpio driver version 07.25.02 GPIO #0 at 0xcb10f700 RAMDISK driver initialized: 16 RAM disks of 12288K size 1024 blocksize loop: loaded (max 8 devices) IBM On-chip iic (i2c) algorithm module 2002.30.04 iic_ibmocp_init: IBM on-chip iic adapter module i2c-dev.o: Registered 'IBM OCP IIC adapter' as minor 0 i2c-core.o: adapter IBM OCP IIC adapter registered as adapter 0. i2c-core.o: driver ds1307 registered. i2c-core.o: client [ds1307] registered to adapter [IBM OCP IIC adapter](pos. 0). NET4: Linux TCP/IP 1.0 for NET4.0 IP Protocols: ICMP, UDP, TCP, IGMP IP: routing cache hash table of 1024 buckets, 8Kbytes TCP: Hash tables configured (established 8192 bind 8192) ip_conntrack version 2.1 (1024 buckets, 8192 max) - 320 bytes per conntrack ip_tables: (C) 2000-2002 Netfilter core team NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. NET4: Unix domain sockets 1.0/SMP for Linux NET4.0. RAMDISK: Compressed image found at block 0 Freeing initrd memory: 4229k freed VFS: Mounted root (ext2 filesystem) readonly. Mounted devfs on /dev Freeing unused kernel memory: 88k init Starting system services,please wait....... ----------------------------------------------------------------- ???Yahoo!?? Yahoo! ???? - ????????????????? bid.yahoo.com.tw ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
