I'm trying to get Tiny Core working on the Beaglebone. I'm stuck on getting the Tiny Core userland file "uCore" to load so init works. I'm using this uEnv.txt:
bootfile=/uImage optargs=init=/init rootwait fatload mmc 0 0x43100000 uCore mmcboot=echo Booting from mmc ...; run mmcargs; bootm 0x80200000 0x43100000
I get the following "data abort":
## Booting kernel from Legacy Image at 80200000 ... Image Name: Linux-3.6.0-rc7-00219-g35e0f42 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 2878667 Bytes = 2.7 MiB Load Address: 80008000 Entry Point: 80008000 Verifying Checksum ... OK data abort pc : [<8ff99480>] lr : [<8ff996ac>] sp : 8fe6abd0 ip : 8fe6d163 fp : 00000001 r10: 00000002 r9 : 00000000 r8 : 8fe6af68 r7 : 8ffbaebc r6 : 43100000 r5 : 8ffbaec0 r4 : 43100000 r3 : 00000000 r2 : 00000010 r1 : 00000000 r0 : 43100000 Flags: nZCv IRQs off FIQs on Mode SVC_32 Resetting CPU ...
If I change mmcboot to:
mmcboot=echo Booting from mmc ...; run mmcargs; bootm 0x80200000
The kernel loads, but init fails:
EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) VFS: Mounted root (ext4 filesystem) readonly on device 179:2. devtmpfs: error mounting -2 Freeing init memory: 144K Failed to execute /init. Attempting defaults... Kernel panic - not syncing: No init found. Try passing init= option to kernel.
Can anyone tell me how to load uCore so init works?
- Grant