接着前一篇博文。
在上一篇博文中我们用NFS挂载根文件系统的方式启动了系统，接下来我们把移植了Python3的根文件系统固化到NandFlash中，但是由于linux-4.9目前不支持Yaffs2文件系统，所以我们用Jiffs2文件系统。
下面我们分为几部分：
1、移植mtd-utils工具
2、固化根文件系统到NandFlash中
3、支持Telnet
平台
硬件：TQ2440 64MB内存 256MB NandFlash
bootloader：U-Boot 2015.04
kernel：linux-4.9
Python: Python-3.6.0
工具链：arm-none-linux-gnueabi-gcc 4.8.3
正文
一、移植mtd-utils工具
mtd-utils提供了大量的用于操作Flash的工具，这里需要首先下载编译一些依赖包。
- zlib-1.2.11
下面是编译脚本：
1 #!/bin/bash 2 3 export CC=arm-linux-gcc 4 5 ../configure --prefix=`pwd` 6 --shared
然后编译make && make install
- lzo-2.10
下载 http://files.cnblogs.com/files/pengdonglin137/lzo-2.10.tar.gz 或者 http://www.oberhumer.com/opensource/lzo/download/
编译脚本：
1 #!/bin/bash 2 3 ../configure --host=arm-linux 4 CC="arm-linux-gcc" 5 --prefix=`pwd`
然后编译make && make install
- e2fsprogs-1.43.4
下载 http://files.cnblogs.com/files/pengdonglin137/e2fsprogs-1.43.4.tar.gz 或者 https://sourceforge.net/projects/e2fsprogs/files/latest/download?source=files
编译：
1 #!/bin/bash 2 3 ../configure --host=arm-linux 4 CC="arm-linux-gcc" 5 --prefix=`pwd`
编译 make && make install
- mtd-utils
下载：http://git.infradead.org/mtd-utils.git 或者 http://files.cnblogs.com/files/pengdonglin137/mtd-utils-v2.tar.gz
编译：
1 ( pengdl@ubuntu | ~/Study/tq2440/MTD_UTILS/mtd-utils-v2 | Remote:True ) 2 $./autogen.sh 3 4 ( pengdl@ubuntu | ~/Study/tq2440/MTD_UTILS/mtd-utils-v2 | Remote:True Ret: 130 @ 22:31:03 ) 5 $cd build_tq2440/ 6 7 ( pengdl@ubuntu | ~/Study/tq2440/MTD_UTILS/mtd-utils-v2/build_tq2440 | Remote:True ) 8 $./mk.sh
编译脚本：
1 #!/bin/bash 2 3 export CC=arm-linux-gcc 4 export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/home/pengdl/Study/tq2440/MTD_UTILS/e2fsprogs-1.43.4/build_tq2440/lib/uuid 5 6 ../configure --host=arm-linux 7 --prefix=`pwd` 8 LDFLAGS="-L/home/pengdl/Study/tq2440/MTD_UTILS/zlib-1.2.11/build_tq2440/lib 9 -L/home/pengdl/Study/tq2440/MTD_UTILS/lzo-2.10/build_tq2440/lib 10 -L/home/pengdl/Study/tq2440/MTD_UTILS/e2fsprogs-1.43.4/build_tq2440/lib" 11 CPPFLAGS="-I/home/pengdl/Study/tq2440/MTD_UTILS/zlib-1.2.11/build_tq2440/include 12 -I/home/pengdl/Study/tq2440/MTD_UTILS/lzo-2.10/build_tq2440/include 13 -I/home/pengdl/Study/tq2440/MTD_UTILS/e2fsprogs-1.43.4/build_tq2440/include" 14 15 make -j4 16 make install
在sbin下面会生成我们需要的工具， 这里我们只要flash_eraseall和flash_erase两个工具， 将这两个工具拷贝到根文件系统的/bin下面。
二、固化根文件系统到NandFlash
先把前一篇博文中生成的rootfs目录进行压缩：
sudo tar -czf rootfs.tar.gz rootfs
然后将rootfs.tar.gz拷贝到根文件系统下面，然后启动系统，烧写系统：
1 flash_eraseall /dev/mtd5 2 mount -t jffs2 /dev/mtdblock5 /mnt 3 tar -xf rootfs.tar.gz /mnt 4 cd /mnt 5 mv rootfs/* . 6 rm -r rootfs
然后修改uboot的bootargs参数：
noinitrd root=/dev/mtdblock5 rw rootfstype=jffs2 console=ttySAC0,115200n init=/linuxrc
三、支持telnet
四、开机log
1 U-Boot 2015.04-g5095150 (Dec 21 2015 - 06:17:05) 2 3 CPUID: 32440001 4 FCLK: 400 MHz 5 HCLK: 100 MHz 6 PCLK: 50 MHz 7 I2C: ready 8 DRAM: 64 MiB 9 WARNING: Caches not enabled 10 Flash: 0 Bytes 11 NAND: 256 MiB 12 In: serial 13 Out: serial 14 Err: serial 15 Net: dm9000 16 Hit any key to stop autoboot: 0 17 18 NAND read: device 0 offset 0x300000, size 0x500000 19 5242880 bytes read: OK 20 21 NAND read: device 0 offset 0x800000, size 0x100000 22 1048576 bytes read: OK 23 ## Booting kernel from Legacy Image at 30008000 ... 24 Image Name: Linux-4.9.0+ 25 Created: 2017-04-19 10:07:00 UTC 26 Image Type: ARM Linux Kernel Image (uncompressed) 27 Data Size: 3503832 Bytes = 3.3 MiB 28 Load Address: 30008000 29 Entry Point: 30008000 30 Verifying Checksum ... OK 31 ## Flattened Device Tree blob at 32000000 32 Booting using the fdt blob at 0x32000000 33 Loading Kernel Image ... OK 34 Loading Device Tree to 33aa6000, end 33aaa62c ... OK 35 36 Starting kernel ... 37 38 Uncompressing Linux... done, booting the kernel. 39 [ 0.000000] Booting Linux on physical CPU 0x0 40 [ 0.000000] Linux version 4.9.0+ (pengdl@ubuntu) (gcc version 4.8.3 20140320 (prerelease) (Sourcery CodeBench Lite 2014.05-29) ) #2 Wed Apr 19 03:06:50 PDT 2017 41 [ 0.000000] CPU: ARM920T [41129200] revision 0 (ARMv4T), cr=c000717f 42 [ 0.000000] CPU: VIVT data cache, VIVT instruction cache 43 [ 0.000000] OF: fdt:Machine model: TQ2440 44 [ 0.000000] Memory policy: Data cache writeback 45 [ 0.000000] DT missing boot CPU MPIDR[23:0], fall back to default cpu_logical_map 46 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 16256 47 [ 0.000000] Kernel command line: noinitrd root=/dev/mtdblock5 rw rootfstype=jffs2 console=ttySAC0,115200n init=/linuxrc 48 [ 0.000000] PID hash table entries: 256 (order: -2, 1024 bytes) 49 [ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) 50 [ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) 51 [ 0.000000] Memory: 57900K/65536K available (4729K kernel code, 234K rwdata, 1376K rodata, 204K init, 262K bss, 7636K reserved, 0K cma-reserved) 52 [ 0.000000] Virtual kernel memory layout: 53 [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) 54 [ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB) 55 [ 0.000000] vmalloc : 0xc4800000 - 0xff800000 ( 944 MB) 56 [ 0.000000] lowmem : 0xc0000000 - 0xc4000000 ( 64 MB) 57 [ 0.000000] modules : 0xbf000000 - 0xc0000000 ( 16 MB) 58 [ 0.000000] .text : 0xc0008000 - 0xc04a67f0 (4730 kB) 59 [ 0.000000] .init : 0xc0627000 - 0xc065a000 ( 204 kB) 60 [ 0.000000] .data : 0xc065a000 - 0xc0694840 ( 235 kB) 61 [ 0.000000] .bss : 0xc0694840 - 0xc06d60a8 ( 263 kB) 62 [ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 63 [ 0.000000] NR_IRQS:103 64 [ 0.000000] irq: clearing pending status 00000002 65 [ 0.000000] _get_rate: could not find clock xti 66 [ 0.000128] sched_clock: 16 bits at 1000kHz, resolution 1000ns, wraps every 32767500ns 67 [ 0.000262] clocksource: samsung_clocksource_timer: mask: 0xffff max_cycles: 0xffff, max_idle_ns: 29163075 ns 68 [ 0.001283] Console: colour dummy device 80x30 69 [ 0.001485] Calibrating delay loop... 199.47 BogoMIPS (lpj=498688) 70 [ 0.035125] pid_max: default: 32768 minimum: 301 71 [ 0.035715] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) 72 [ 0.035803] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) 73 [ 0.039125] CPU: Testing write buffer coherency: ok 74 [ 0.041713] Setting up static identity map for 0x30008200 - 0x30008258 75 [ 0.067192] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 9556302231375000 ns 76 [ 0.067812] pinctrl core: initialized pinctrl subsystem 77 [ 0.071047] NET: Registered protocol family 16 78 [ 0.074165] DMA: preallocated 256 KiB pool for atomic coherent allocations 79 [ 0.096405] cpuidle: using governor ladder 80 [ 0.097029] No ATAGs? 81 [ 0.355694] SCSI subsystem initialized 82 [ 0.357161] usbcore: registered new interface driver usbfs 83 [ 0.357830] usbcore: registered new interface driver hub 84 [ 0.358518] usbcore: registered new device driver usb 85 [ 0.362268] Advanced Linux Sound Architecture Driver Initialized. 86 [ 0.393373] clocksource: Switched to clocksource samsung_clocksource_timer 87 [ 0.460629] NET: Registered protocol family 2 88 [ 0.464553] TCP established hash table entries: 1024 (order: 0, 4096 bytes) 89 [ 0.464669] TCP bind hash table entries: 1024 (order: 0, 4096 bytes) 90 [ 0.464723] TCP: Hash tables configured (established 1024 bind 1024) 91 [ 0.465667] UDP hash table entries: 256 (order: 0, 4096 bytes) 92 [ 0.465778] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) 93 [ 0.466911] NET: Registered protocol family 1 94 [ 0.545633] RPC: Registered named UNIX socket transport module. 95 [ 0.545741] RPC: Registered udp transport module. 96 [ 0.545757] RPC: Registered tcp transport module. 97 [ 0.545773] RPC: Registered tcp NFSv4.1 backchannel transport module. 98 [ 0.553953] futex hash table entries: 256 (order: -1, 3072 bytes) 99 [ 0.562980] workingset: timestamp_bits=30 max_order=14 bucket_order=0 100 [ 0.697643] NFS: Registering the id_resolver key type 101 [ 0.697875] Key type id_resolver registered 102 [ 0.697912] Key type id_legacy registered 103 [ 0.697998] nfs4filelayout_init: NFSv4 File Layout Driver Registering... 104 [ 0.698281] jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc. 105 [ 0.707965] romfs: ROMFS MTD (C) 2007 Red Hat, Inc. 106 [ 0.728928] io scheduler noop registered 107 [ 0.729037] io scheduler deadline registered 108 [ 0.731029] io scheduler cfq registered (default) 109 [ 0.945571] 50000000.serial: ttySAC0 at MMIO 0x50000000 (irq = 32, base_baud = 0) is a S3C2440 110 [ 1.303277] random: fast init done 111 [ 1.537741] console [ttySAC0] enabled 112 [ 1.693858] brd: module loaded 113 [ 1.698712] s3c24xx-nand 4e000000.nand: Tacls=1, 10ns Twrph0=3 30ns, Twrph1=1 10ns 114 [ 1.701109] s3c24xx-nand 4e000000.nand: NAND ECC disabled 115 [ 1.706441] nand: device found, Manufacturer ID: 0xec, Chip ID: 0xda 116 [ 1.712658] nand: Samsung NAND 256MiB 3,3V 8-bit 117 [ 1.717150] nand: 256 MiB, SLC, erase size: 128 KiB, page size: 2048, OOB size: 64 118 [ 1.724707] nand: NAND_ECC_NONE selected by board driver. This is not recommended! 119 [ 1.732301] Scanning device for bad blocks 120 [ 1.761552] Bad eraseblock 364 at 0x000002d80000 121 [ 1.761944] Bad eraseblock 369 at 0x000002e20000 122 [ 1.774618] Bad eraseblock 558 at 0x0000045c0000 123 [ 1.810576] Bad eraseblock 1291 at 0x00000a160000 124 [ 1.835265] Bad eraseblock 1792 at 0x00000e000000 125 [ 1.835424] Bad eraseblock 1793 at 0x00000e020000 126 [ 1.851744] Creating 6 MTD partitions on "tq2440-0": 127 [ 1.851909] 0x000000000000-0x000000100000 : "SPL" 128 [ 1.860632] ftl_cs: FTL header not found. 129 [ 1.867840] 0x000000100000-0x000000200000 : "U-BOOT" 130 [ 1.876060] ftl_cs: FTL header not found. 131 [ 1.881673] 0x000000200000-0x000000300000 : "PARAMS" 132 [ 1.887146] ftl_cs: FTL header not found. 133 [ 1.895758] 0x000000300000-0x000000800000 : "KERNEL" 134 [ 1.904875] ftl_cs: FTL header not found. 135 [ 1.910723] 0x000000800000-0x000000900000 : "DTB" 136 [ 1.916009] ftl_cs: FTL header not found. 137 [ 1.925445] 0x000000900000-0x000010000000 : "ROOTFS" 138 [ 1.937184] ftl_cs: FTL header not found. 139 [ 1.949791] eth0: dm9000e at c4932000,c4934004 IRQ 7 MAC: 00:00:de:ad:be:ef (platform data) 140 [ 1.953206] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver 141 [ 1.959146] ohci-s3c2410: OHCI S3C2410 driver 142 [ 1.966554] s3c2410-ohci 49000000.usb_ohci: OHCI Host Controller 143 [ 1.969213] s3c2410-ohci 49000000.usb_ohci: new USB bus registered, assigned bus number 1 144 [ 1.978389] s3c2410-ohci 49000000.usb_ohci: irq 26, io mem 0x49000000 145 [ 2.049314] hub 1-0:1.0: USB hub found 146 [ 2.051489] hub 1-0:1.0: 2 ports detected 147 [ 2.057806] usbcore: registered new interface driver usb-storage 148 [ 2.060801] mousedev: PS/2 mouse device common for all mice 149 [ 2.066162] s3c-rtc 57000000.rtc: rtc disabled, re-enabling 150 [ 2.070382] rtc rtc0: alarm rollover not handled 151 [ 2.073906] rtc rtc0: invalid alarm value: 1900-2-1 0:0:0 152 [ 2.080535] s3c-rtc 57000000.rtc: rtc core: registered s3c as rtc0 153 [ 2.086568] i2c /dev entries driver 154 [ 2.093037] s3c2410-wdt 53000000.watchdog: watchdog inactive, reset disabled, irq disabled 155 [ 2.099750] sdhci: Secure Digital Host Controller Interface driver 156 [ 2.103179] sdhci: Copyright(c) Pierre Ossman 157 [ 2.110337] hidraw: raw HID events driver (C) Jiri Kosina 158 [ 2.122224] usbcore: registered new interface driver usbhid 159 [ 2.122350] usbhid: USB HID core driver 160 [ 2.131286] NET: Registered protocol family 17 161 [ 2.132068] Key type dns_resolver registered 162 [ 2.197106] s3c-rtc 57000000.rtc: setting system clock to 2000-04-12 01:57:40 UTC (955504660) 163 [ 2.201017] ALSA device list: 164 [ 2.203000] No soundcards found. 165 [ 8.385039] VFS: Mounted root (jffs2 filesystem) on device 31:5. 166 [ 8.386953] Freeing unused kernel memory: 204K (c0627000 - c065a000) 167 [ 8.392017] This architecture does not have kernel memory protection. 168 [ 11.614549] dm9000 20000000.ethernet eth0: link up, 100Mbps, full-duplex, lpa 0xCDE1 169 170 Please press Enter to activate this console. 171 [root@tq2440 ]# 172 [root@tq2440 ]# mount 173 /dev/root on / type jffs2 (rw,relatime) 174 proc on /proc type proc (rw,relatime) 175 tmpfs on /tmp type tmpfs (rw,relatime) 176 sysfs on /sys type sysfs (rw,relatime) 177 tmpfs on /dev type tmpfs (rw,relatime) 178 debugfs on /sys/kernel/debug type debugfs (rw,relatime) 179 devpts on /dev/pts type devpts (rw,relatime,mode=600,ptmxmode=000) 180 [root@tq2440 ]# cat /proc/mtd 181 dev: size erasesize name 182 mtd0: 00100000 00020000 "SPL" 183 mtd1: 00100000 00020000 "U-BOOT" 184 mtd2: 00100000 00020000 "PARAMS" 185 mtd3: 00500000 00020000 "KERNEL" 186 mtd4: 00100000 00020000 "DTB" 187 mtd5: 0f700000 00020000 "ROOTFS" 188 [root@tq2440 ]#
完。