Hi, The kernel 2.6.33 failed to mount the rootfs on the ramdisk. I enabled the ramdisk block device support and ext2 filesystem as shown below.
CONFIG_BLK_DEV_RAM=y CONFIG_BLK_DEV_RAM_COUNT=16 CONFIG_BLK_DEV_RAM_SIZE=4096 CONFIG_EXT2_FS=y Are these adequate configurations for kernel to support rootfs on ramdisk? What have I missed? The ramdisk image is from DENX's SELF. The boot message is shown below. => bootm 1000000 2000000 ## Booting image at 01000000 ... Image Name: Linux-2.6.33.5 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 1070272 Bytes = 1 MB Load Address: 00400000 Entry Point: 00400554 Verifying Checksum ... OK Uncompressing Kernel Image ... OK ## Loading RAMDisk Image at 02000000 ... Image Name: Simple Embedded Linux Framework Image Type: PowerPC Linux RAMDisk Image (gzip compressed) Data Size: 1459535 Bytes = 1.4 MB Load Address: 00000000 Entry Point: 00000000 Verifying Checksum ... OK Loading Ramdisk to 07bb7000, end 07d1b54f ... OK Memory <- <0x0 0x8000000> (128MB) ENET0: local-mac-address <- 00:09:9b:01:58:64 CPU clock-frequency <- 0x7270e00 (120MHz) CPU timebase-frequency <- 0x7270e0 (8MHz) CPU bus-frequency <- 0x3938700 (60MHz) zImage starting: loaded at 0x00400000 (sp: 0x07d1cbd0) Allocating 0x23f554 bytes for kernel ... gunzipping (0x00000000 <- 0x0040c000:0x0067d01c)...done 0x22e6ec bytes Using loader supplied ramdisk at 0x7bb7000-0x7d1b54f initrd head: 0x1f8b0808 Linux/PowerPC load: root=/dev/ram Finalizing device tree... flat tree at 0x68a300 ....... NET: Registered protocol family 17 List of all partitions: No filesystem could mount root, tried: ext2 Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) Call Trace: [c781fed0] [c0006ce0] show_stack+0x40/0x168 (unreliable) [c781ff10] [c001cc5c] panic+0x8c/0x178 [c781ff60] [c0201dc0] mount_block_root+0x1d4/0x244 [c781ffb0] [c0201fa4] prepare_namespace+0x64/0x210 [c781ffd0] [c0201220] kernel_init+0x104/0x130 [c781fff0] [c000dcc8] kernel_thread+0x4c/0x68 Rebooting in 180 seconds.. Thanks, -Shawn. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
