TI的8168EVM，最近转到RVRRDK平台
烧写uboot、内核和ubifs文件系统到flash，完全按照install guide上的步骤来的，地址也没改，设置环境变量后启动kernel成功，引导文件系统失败，错误如下：
omap_rtc omap_rtc: setting system clock to 2000-01-01 00:00:00 UTC (946684800)
ata1: SATA link down (SStatus 0 SControl 300)
ata2: SATA link down (SStatus 0 SControl 300)
VFS: Cannot open root device "ubi0:rootfs" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partitions:
1f00 64 mtdblock0 (driver?)
1f02 64 mtdblock2 (driver?)
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
Backtrace:
[<c004efac>] (dump_backtrace+0x0/0x110) from [<c03b438c>] (dump_stack+0x18/0x1c)
r6:00008000 r5:ce414000 r4:c055e698 r3:60000013
[<c03b4374>] (dump_stack+0x0/0x1c) from [<c03b43ec>] (panic+0x5c/0x178)
[<c03b4390>] (panic+0x0/0x178) from [<c0009184>] (mount_block_root+0x1c4/0x204)
r3:00000000 r2:00000000 r1:ce42bf78 r0:c0481155
r7:c002fae4
[<c0008fc0>] (mount_block_root+0x0/0x204) from [<c000940c>] (prepare_namespace+0x94/0x1cc)
[<c0009378>] (prepare_namespace+0x0/0x1cc) from [<c0008d70>] (kernel_init+0x114/0x154)
r5:c002f0b0 r4:c002f0b0
[<c0008c5c>] (kernel_init+0x0/0x154) from [<c0077780>] (do_exit+0x0/0x5d0)
r5:c0008c5c r4:00000000
环境变量如下：
setenv bootcmd 'nandecc sw;nand read 0x81000000 0x580000 0x300000;bootm 0x81000000'
setenv bootargs 'console=ttyO2,115200n8 noinitrd ip=off mem=256M rootwait=1 rw ubi.mtd=8,2048 rootfstype=ubifs root=ubi0:rootfs init=/init vram=20M notifyk.vpssm3_sva=0xBEE00000 stdin=serial ddr_mem=1024M‘
请教各位可能是什么原因？谢谢
