[uClinux-dev] romfs help?

[Brandon Fosdick]

I'm trying to load the kernel and a romfs image to two different places 
in flash. i've tried using initrd and mtd. I must be especially stupid 
right now, cause it's just not going. I keep getting something like...

---
VFS: Cannot open root device "<NULL>" or unknown-block(0,255)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on 
unknown-block(0,255)
---

Anybody have a working .config for doing something like this? Am I 
better off with initrd or mtd?

Here's my commandline...
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console=ttyS0 
mtdparts=physmap-flash.0:2048k(kernel)ro,1024k(romfs)ro,-(flashfs)ro
---

And what seems to be the relevant parts of the kernel .config...
---
#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
# CONFIG_MTD_DEBUG is not set
# CONFIG_MTD_CONCAT is not set
CONFIG_MTD_PARTITIONS=y
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
# CONFIG_MTD_AFS_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
CONFIG_MTD_CFI_ADV_OPTIONS=y
CONFIG_MTD_CFI_NOSWAP=y
# CONFIG_MTD_CFI_BE_BYTE_SWAP is not set
# CONFIG_MTD_CFI_LE_BYTE_SWAP is not set
CONFIG_MTD_CFI_GEOMETRY=y
# CONFIG_MTD_MAP_BANK_WIDTH_1 is not set
CONFIG_MTD_MAP_BANK_WIDTH_2=y
# CONFIG_MTD_MAP_BANK_WIDTH_4 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
# CONFIG_MTD_CFI_I2 is not set
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
# CONFIG_MTD_OTP is not set
CONFIG_MTD_CFI_INTELEXT=y
# CONFIG_MTD_CFI_AMDSTD is not set
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_EPCS is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_PHYSMAP_START=0x80000000
CONFIG_MTD_PHYSMAP_LEN=0x1000000
CONFIG_MTD_PHYSMAP_BANKWIDTH=2
# CONFIG_MTD_ARM_INTEGRATOR is not set
CONFIG_MTD_UCLINUX=y
# CONFIG_MTD_UCLINUX_EBSS is not set
CONFIG_MTD_UCLINUX_ADDRESS=0x80200000
# CONFIG_MTD_UCLINUX_RAM is not set
CONFIG_MTD_UCLINUX_ROM=y
# CONFIG_MTD_SNAPGEARuC is not set
# CONFIG_MTD_M520x is not set
# CONFIG_MTD_PLATRAM is not set
# CONFIG_MTD_AVNET5282 is not set
---

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