FreeCalypso > hg > freecalypso-citrine

comparison cfgmagic/feature.fcfam-ffs @ 38:24eb59e61b44

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implemented feature fcfam-ffs for fcdev3b target
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 03 May 2017 03:38:22 +0000
parents
children f385e4d87bad
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37:5487db285025 38:24eb59e61b44
1 # This feature is specific to FreeCalypso family targets, i.e., hardware
2 # designed and built within the FreeCalypso family of projects rather than
3 # pre-existing Calypso devices. FC family devices starting with FCDEV3B
4 # use the 16 MiB flash chip originally discovered on the Pirelli DP-L10,
5 # organized as two chip select banks of 8 MiB each; the first flash bank
6 # is for the firmware, and the second flash bank is ideally suited for
7 # file system storage.
8 #
9 # Because we don't really need an 8 MiB FFS, instead of allocating the
10 # entirety of the second flash bank for one gigantic FFS, our current
11 # convention allocates room for up to 3 potential FFS instances, each
12 # 2 MiB in size. Thus we have FFS location 0, FFS location 1 and
13 # FFS location 2. Our Magnetite firmware always uses FFS location 0;
14 # when running Citrine firmware, it is up to you whether you wish your
15 # Citrine fw to use the same FFS as Magnetite or its own separate FFS
16 # instance.
17
18 check_target_feature "$1"
19
20 if [ $# != 2 ]
21 then
22 echo "feature fcfam-ffs: extra argument required" 1>&2
23 exit 1
24 fi
25
26 FFS_IN_RAM=0
27 CONFIG_AFTERMARKET_FFS=1
28
29 case "$2" in
30 0)
31 CONFIG_AFTERMARKET_FFS_START=0
32 ;;
33 1)
34 CONFIG_AFTERMARKET_FFS_START=8
35 ;;
36 2)
37 CONFIG_AFTERMARKET_FFS_START=16
38 ;;
39 *)
40 echo "feature mokoffs: argument must be rw, ro or copy" 1>&2
41 exit 1
42 ;;
43 esac
44
45 CONFIG_AFTERMARKET_FFS_NBLOCKS=8
46 CONFIG_FLASH_WRITE=1
47
48 export_to_c CONFIG_AFTERMARKET_FFS
49 export_to_c CONFIG_AFTERMARKET_FFS_START
50 export_to_c CONFIG_AFTERMARKET_FFS_NBLOCKS
51 export_to_c CONFIG_FLASH_WRITE