AMD Config Advice

Frank R Callaghan
2002-12-19T20:03:45Z

Hi,

I undrstand this may be a very basic question, but here go's

I am looking to use an AMD flash chip on my pc104 card
to store some non-volatile data, the chip is a 2MB part AMD29F016,
the BIOS is in the top 128KB of the first mega-byte(do not want to overwrite).

After setting up the kernel with MDT I get
cat /proc/mtd
dev: size erasesize name
mtd0: 00200000 00010000 "Physically mapped flash"

ok but I only need the second 1MB - is there some way to either
prevent the first meg being mapped/used ?

Kernal Version 2.4.19 with:
#
# Memory Technology Devices (MTD)
#
CONFIG_MTD=y
CONFIG_MTD_DEBUG=y
CONFIG_MTD_DEBUG_VERBOSE=3
# CONFIG_MTD_PARTITIONS is not set
# CONFIG_MTD_CONCAT is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
# CONFIG_MTD_CHAR is not set
CONFIG_MTD_BLOCK=y
CONFIG_FTL=y
# CONFIG_NFTL is not set
#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
CONFIG_MTD_JEDECPROBE=y
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set
# CONFIG_MTD_OBSOLETE_CHIPS is not set
# CONFIG_MTD_AMDSTD is not set
# CONFIG_MTD_SHARP is not set
# CONFIG_MTD_JEDEC is not set
#
# Mapping drivers for chip access
#
CONFIG_MTD_PHYSMAP=y
CONFIG_MTD_PHYSMAP_START=9500000 <- My phy addr of second MB
CONFIG_MTD_PHYSMAP_LEN=100000 <-- 1MB
CONFIG_MTD_PHYSMAP_BUSWIDTH=1
# CONFIG_MTD_PNC2000 is not set
# CONFIG_MTD_SC520CDP is not set
# CONFIG_MTD_NETSC520 is not set
# CONFIG_MTD_SBC_GXX is not set
# CONFIG_MTD_ELAN_104NC is not set
# CONFIG_MTD_DILNETPC is not set
# CONFIG_MTD_MIXMEM is not set
# CONFIG_MTD_OCTAGON is not set
# CONFIG_MTD_VMAX is not set
# CONFIG_MTD_L440GX is not set
# CONFIG_MTD_AMD766ROM is not set
# CONFIG_MTD_ICH2ROM is not set
# CONFIG_MTD_PCI is not set
#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLKMTD is not set
# CONFIG_MTD_DOC1000 is not set
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOCPROBE is not set

also I'm looking to use jffs2 as the file system - maybe I can partion it
to only use the second meg ???

TIA,
Frank.