#export http_proxy="http://192.168.147.242:3128"
先 設好環境變數，
再 依照 instruction run
#/arch/setup
台灣的 mirror:
http://www.mirror.tw/pub/ArchLinux/core/os/i686
安裝完後，在 /etc/pacman.d/mirrirlist 里..
Server = http://www.mirror.tw/pub/ArchLinux/$repo/os/i686
增加的 "$" 符號，在 /etc/pacman.conf 中有說明。
$ 以後的字串，會依照 pacman.conf 的設定代換其他path。
之後，如果想自動設定 http_proxy ，可以在 /etc/profile.d 下 create proxy.sh:
export http_proxy="http://192.168.147.242:3128"
#define CFG_MMC_BASE 0xF0000000
還有address 是以 byte 為單位，不是 sector。
可是 mmc 實際是要以 sector 為單位。
所以寫入時，要check
cp.b 0x002000 0xF00000200 0x200
就會把 memory 的 0x2000 copy 到 mmc 的 0x200 (第一個block) 里。
git diff rev1 rev2
setenv ipaddr 10.0.0.2
setenv netmask 255.255.255.9
setenv gateway 10.0.0.1
這樣 host 端：
ifconfig usb0 10.0.0.1 netmask 255.255.255.0 up
就可以完成連線，然後：
ping 10.0.0.1
checksum bad
checksum bad
host 10.0.0.1 is alive
代表 ping host OK
auto usb0
iface usb0 inet static
address 10.0.0.1
netmask 255.255.255.0
gateway 10.0.0.2
像 nfs client create 一個 file， server 端無法刪除這可以在 server 的 exports 作設定，強制 某 export folder 將 nfs 連線時，client 的uid, gid 改為某一個值
/home/james 192.168.144.42/24(rw,no_root_squash,all_squash,anonuid=1000,anongid=1000,async,no_subtree_check)
/home/charles-chang 192.168.144.182/24(rw,no_root_squash,all_squash,anonuid=1001,anongid=1001,async,no_subtree_check)
option 中 anonuid=1001, anongid=1001 就是 server 端 user: charles-chang 的 uid, gid。
而 1000是 james 的 uid, gid
參考：鳥哥 http://linux.vbird.org/linux_server/0330nfs.php
mkconfig variant ARCH CPU BOARD VENDOR SOC
以 target smdk2410_config 來看：
mkconfig smdk2410 arm arm920t smdk2410 NULL s3c24x0
所以
#include <configs/variabt.h> -- 所以重要的是 configs/variabt.h all : depends on u-boot
u-boot depends on $(SUBDIRS) $(OBJS) $(LIBS)
$(SUBDIRS), $(OBJS) 和 $(LIBS) 的 rule 都是簡單的 make 而已。
$(OBJS) 內都是 cpu/$(CPU)/ 下的 source 檔
$(LIBS) 除一般標準的 driver, disk rtc.. folde 外，還有 board/$(board)/lib$(board).a
make tt2b_config
意思就是把uboot configure 成我的板子：tt2b
在 Makefile 中可以找到 tt2b_config 這個 target。
可以順便看一下其他的 XXX_config
大部分的 XXX_config 都是 call MKCONFIG...
多了：
# include/asm
# include/asm-arm/arch
# include/asm-arm/proc
# include/config.h
# include/config.mk
tt2b 這個 板子是去執行一個 shell script ...
$MKCONFIG -a tt2b arm arm1136 sssoc NULL sssoc
大概看一下..
mkconfig 這個 shell script 後面的 argument 分別是：
"-a" 一開始被 shift 掉.. 所以 tt2b 算 $1
echo "ARCH = $2" > config.mk
echo "CPU = $3" >> config.mk
echo "BOARD = $4" >> config.mk
echo "VENDOR = $5" >> config.mk
echo "SOC = $6" >> config.mk
第一個 argument "tt2b" 會被用在 新產生的 include/config.h 里：
cd ./include
echo "/* Automatically generated - do not edit */" >>config.h
echo "#include <configs/$1.h>" >>config.h
$2, $3 還被用來建 inlude/asm,, proc 的 folder link
make $(BDNAME)_config然後去找 BDNAME (是 tt2cb)
在uboot/Makefile找到 tt2cb_config 的 rule : 是 board/vendor/ 下的 一個 shell script，他會去修改 include/config.h
接上 usb... boot uboot 時原來 USB0 Cable is not plugged-in 的 message 消失了。
在 linux host 上 dmesg :
[1756640.022407] usb 4-3: USB disconnect, address 9
[1756645.672024] usb 4-3: new high speed USB device using ehci_hcd and address 10
[1756645.808028] hub 4-0:1.0: unable to enumerate USB device on port 3
[1756646.252023] usb 2-1: new full speed USB device using ohci_hcd and address 2
[1756647.500029] hub 2-0:1.0: unable to enumerate USB device on port 1
[1756653.972024] usb 4-3: new high speed USB device using ehci_hcd and address 11
[1756654.105202] usb 4-3: configuration #2 chosen from 1 choice
[1756654.110595] usb 4-3: New USB device found, idVendor=105b, idProduct=9030
[1756654.110602] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1756654.110605] usb 4-3: Product: bd2x0bd
[1756654.110608] usb 4-3: Manufacturer: Sxxx
[1756654.110610] usb 4-3: SerialNumber: 0
[1756654.363827] cdc_acm: This device cannot do calls on its own. It is no modem.
[1756654.364055] cdc_acm 4-3:2.0: ttyACM0: USB ACM device
[1756654.366357] usbcore: registered new interface driver cdc_acm[1756654.366365] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters
list installed module 來看..多了 cdc_acm 這個 driver/module.
查一下 include/configs/tt2b.h有定義
#define CONFIG_USB_TTY 0 /* Controller USB0 */
#define CONFIG_USB_ETHER 1 /* Controller USB1 */
所以知道 Rx6 的 usb port 是 usb0 -- 從 uboot 消失的 message 可以知道。所以是 USB_TTY。 所以 driver 是 cdc_acm.
變更一下，把 USB0 改作 ETHER..
開機dmesg:
[1757943.195445] usb 4-3: New USB device found, idVendor=105b, idProduct=9030
[1757943.195451] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1757943.195454] usb 4-3: Product: bd2x0bd
[1757943.195457] usb 4-3: Manufacturer: SiRF
[1757943.195459] usb 4-3: SerialNumber: 0
[1757944.330011] usb 4-3: USB disconnect, address 13
[1758205.148026] usb 4-3: new high speed USB device using ehci_hcd and address 14
[1758205.281250] usb 4-3: configuration #1 chosen from 1 choice
[1758205.286289] usb 4-3: New USB device found, idVendor=105b, idProduct=9030
[1758205.286296] usb 4-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[1758205.286299] usb 4-3: Product: bd2x0bd
[1758205.286302] usb 4-3: Manufacturer: SiRF
[1758205.486224] usb0: register 'cdc_ether' at usb-0000:00:0f.3-3, CDC Ethernet Device, 1e:6e:37:bc:8a:47
[1758205.486251] usbcore: registered new interface driver cdc_ether
lsmod 果然就有 cdc_ether,ifconfig 則增加了：
usb0 Link encap:Ethernet HWaddr 1e:6e:37:bc:8a:47
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:90 (90.0 B)
TOC_START_BLOCK=0x21
g_dwTOCBlock=0x21
g_dwTOCBlockSize=0x1
g_dwEBootBlock=0x22
g_dwEBootblocksize=0x1000
g_dwDMBlock=0x1022
g_dwDMBlocksize=0x480
g_dwSecureBlock=0x14A2
g_dwSecureBlocksize=0x4
g_dwLOGOBlock=0x14A6
g_dwLOGOBlocksize=0x1FE
g_dwNKBlock=0x16A4
TOC update
配合 program nboot.bin, uboot.bin 到 sd 的 shell script 來看 sd card 的配置：
Jumpto image:0x0
Sector Needed 0x1000
dwRAM: 0x8D000000
JumpAddr: 0xC1000000
startsect=0x22
dwNumSectors=0x1000
dwRAM=0x8D000000
Jumpto:0xC1000000
Preparing System for Linux Kernel Boot
start Address: 0x22
Load Address: 0x8C01A000
Jump Address: 0x8C01A000
Ttl Sectors: 0x180
Chain in TOC:
Chain Load Addr: 0x0
startsect=0x22
dwNumSectors=0x180
dwRAM=0x8C01A000
Jumpto:0xC001A000
所以差異是在 ram 的 address 上..
Reset TOC
@@@@ g_pTOC is not valid, init it @@@@
TOC_START_BLOCK=0x21
g_dwTOCBlock=0x21
g_dwTOCBlockSize=0x1
g_dwEBootBlock=0x22
g_dwEBootblocksize=0x180
g_dwDMBlock=0x1A2
g_dwDMBlocksize=0x0
g_dwSecureBlock=0x1A2
g_dwSecureBlocksize=0x4
g_dwLOGOBlock=0x1A6
g_dwLOGOBlocksize=0x1FE
g_dwNKBlock=0x3A4
TOC updateTOC update
決定 nboot payload - eboot/uboot 的 預留空間size是 predefine 的， linux 和 ce 在這裡不一樣：