AM335x(TQ335x)学习笔记——使用dtb方式启动内核
2019-07-15 15:19 发布
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AM335x(TQ335x)学习笔记——使用dtb方式启动内核 老式的u-boot使用ATAGS的方式启动linux内核，本文使用新式的dtb方式启动内核。 我使用的内核是linux-3.17.2版本，下面开始编译内核。 （1） 解压内核 tar jxf linux-3.17.2.tar.bz2 复制代码 （2）配置linux内核，由于am335x在内核中都归为omap2系列，故可以使用如下命令： make ARCH=arm omap2plus_defconfig 复制代码 （3）编译内核： make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j8 复制代码 我的linux工具链前缀是arm-linux-gnueabi-，这个需要根据自己的实际的工具链情况进行替换。 （4）编译dtb： make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- am335x-evm.dtb 复制代码 （5）制作启动盘： 将SD格式化为FAT系统，将MLO、u-boot.img拷贝到根目录下。 在根目录下创建boot目录，将编译好的zImage和am335x-evm.dtb拷贝到该目录下。 （6）u-boot命令行启动Linux内核 load mmc 0 0x88000000 /boot/am335x-evm.dtb load mmc 0 0x82000000 /boot/zImage bootz 0x82000000 - 0x88000000 复制代码 至此，Linux内核就能启动了，看到的Log信息如下： U-Boot# load mmc 0 ${fdtaddr} /boot/tq335x.dtb 34720 bytes read in 9 ms (3.7 MiB/s) U-Boot# load mmc 0 ${loadaddr} /boot/zImage 4385928 bytes read in 243 ms (17.2 MiB/s) U-Boot# bootz ${loadaddr} - ${fdtaddr} Kernel image @ 0x82000000 [ 0x000000 - 0x42ec88 ] ## Flattened Device Tree blob at 88000000 Booting using the fdt blob at 0x88000000 Loading Device Tree to 8fff4000, end 8ffff79f ... OK Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.17.2 (lilianrong@AY140721164813287e77Z) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-12ubuntu1) ) #1 SMP Mon Nov 10 20:46:04 CST 2014 [ 0.000000] CPU: ARMv7 Processor [413fc082] revision 2 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache [ 0.000000] Machine model: TI AM335x EVM [ 0.000000] cma: Reserved 16 MiB at 9e800000 [ 0.000000] Memory policy: Data cache writeback [ 0.000000] HighMem zone: 1048574 pages exceeds freesize 0 [ 0.000000] CPU: All CPU(s) started in SVC mode. [ 0.000000] AM335X ES2.1 (sgx neon ) [ 0.000000] PERCPU: Embedded 9 pages/cpu @dfa9a000 s14336 r8192 d14336 u36864 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129792 [ 0.000000] Kernel command line: console=ttyO0,115200n8 root=ubi0:rootfs rw ubi.mtd=9,2048 rootfstype=ubifs rootwait=1 [ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) [ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) [ 0.000000] Memory: 484792K/523264K available (5668K kernel code, 647K rwdata, 2208K rodata, 406K init, 8210K bss, 38472K reserved, 0K highmem) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xffc00000 - 0xffe00000 (2048 kB) [ 0.000000] vmalloc : 0xe0800000 - 0xff000000 ( 488 MB) [ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) [ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB) [ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB) [ 0.000000] .text : 0xc0008000 - 0xc07b9478 (7878 kB) [ 0.000000] .init : 0xc07ba000 - 0xc081f800 ( 406 kB) [ 0.000000] .data : 0xc0820000 - 0xc08c1d08 ( 648 kB) [ 0.000000] .bss : 0xc08c1d08 - 0xc10c68e0 (8211 kB) [ 0.000000] Hierarchical RCU implementation. [ 0.000000] RCU restricting CPUs from NR_CPUS=2 to nr_cpu_ids=1. [ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1 [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 5.0) with 128 interrupts [ 0.000000] Total of 128 interrupts on 1 active controller [ 0.000000] OMAP clockevent source: timer2 at 24000000 Hz [ 0.000016] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns [ 0.000065] OMAP clocksource: timer1 at 24000000 Hz [ 0.000805] Console: colour dummy device 80x30 [ 0.000857] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.000865] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.000873] ... MAX_LOCK_DEPTH: 48 [ 0.000880] ... MAX_LOCKDEP_KEYS: 8191 [ 0.000888] ... CLASSHASH_SIZE: 4096 [ 0.000895] ... MAX_LOCKDEP_ENTRIES: 32768 [ 0.000902] ... MAX_LOCKDEP_CHAINS: 65536 [ 0.000909] ... CHAINHASH_SIZE: 32768 [ 0.000916] memory used by lock dependency info: 5167 kB [ 0.000924] per task-struct memory footprint: 1152 bytes [ 0.000966] Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736) [ 0.079040] pid_max: default: 32768 minimum: 301 [ 0.079436] Security Framework initialized [ 0.079561] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.079574] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.081771] CPU: Testing write buffer coherency: ok [ 0.082962] CPU0: thread -1, cpu 0, socket -1, mpidr 0 [ 0.083083] Setting up static identity map for 0x8055f030 - 0x8055f0a0 [ 0.086327] Brought up 1 CPUs [ 0.086346] SMP: Total of 1 processors activated. [ 0.086356] CPU: All CPU(s) started in SVC mode. [ 0.088958] devtmpfs: initialized [ 0.097809] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3 [ 0.134392] omap_hwmod: tptc0 using broken dt data from edma [ 0.134758] omap_hwmod: tptc1 using broken dt data from edma [ 0.135103] omap_hwmod: tptc2 using broken dt data from edma [ 0.143122] omap_hwmod: debugss: _wait_target_disable failed [ 0.201002] pinctrl core: initialized pinctrl subsystem [ 0.203537] regulator-dummy: no parameters [ 0.233163] NET: Registered protocol family 16 [ 0.241735] DMA: preallocated 256 KiB pool for atomic coherent allocations [ 0.243918] cpuidle: using governor ladder [ 0.243946] cpuidle: using governor menu [ 0.255876] OMAP GPIO hardware version 0.1 [ 0.271254] omap-gpmc 50000000.gpmc: could not find pctldev for node /pinmux@44e10800/nandflash_pins_s0, deferring probe [ 0.271303] platform 50000000.gpmc: Driver omap-gpmc requests probe deferral [ 0.275826] No ATAGs? [ 0.275857] hw-breakpoint: debug architecture 0x4 unsupported. [ 0.319359] edma-dma-engine edma-dma-engine.0: TI EDMA DMA engine driver [ 0.320718] vbat: 5000 mV [ 0.321481] lis3_reg: no parameters [ 0.324766] SCSI subsystem initialized [ 0.325577] usbcore: registered new interface driver usbfs [ 0.325755] usbcore: registered new interface driver hub [ 0.329802] usbcore: registered new device driver usb [ 0.330683] omap_i2c 44e0b000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c0_pins, deferring probe [ 0.330726] platform 44e0b000.i2c: Driver omap_i2c requests probe deferral [ 0.330784] omap_i2c 4802a000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c1_pins, deferring probe [ 0.330808] platform 4802a000.i2c: Driver omap_i2c requests probe deferral [ 0.335082] Switched to clocksource timer1 [ 0.480572] NET: Registered protocol family 2 [ 0.482404] TCP established hash table entries: 4096 (order: 2, 16384 bytes) [ 0.482587] TCP bind hash table entries: 4096 (order: 5, 147456 bytes) [ 0.483951] TCP: Hash tables configured (established 4096 bind 4096) [ 0.484145] TCP: reno registered [ 0.484169] UDP hash table entries: 256 (order: 2, 20480 bytes) [ 0.484359] UDP-Lite hash table entries: 256 (order: 2, 20480 bytes) [ 0.485643] NET: Registered protocol family 1 [ 0.487595] RPC: Registered named UNIX socket transport module. [ 0.487618] RPC: Registered udp transport module. [ 0.487628] RPC: Registered tcp transport module. [ 0.487637] RPC: Registered tcp NFSv4.1 backchannel transport module. [ 0.488910] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available [ 0.493146] futex hash table entries: 256 (order: 2, 16384 bytes) [ 0.498771] VFS: Disk quotas dquot_6.5.2 [ 0.498919] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes) [ 0.500956] NFS: Registering the id_resolver key type [ 0.501307] Key type id_resolver registered [ 0.501322] Key type id_legacy registered [ 0.501464] jffs2: version 2.2. (NAND) (SUMMARY) 漏 2001-2006 Red Hat, Inc. [ 0.501877] msgmni has been set to 978 [ 0.507196] io scheduler noop registered [ 0.507232] io scheduler deadline registered [ 0.507301] io scheduler cfq registered (default) [ 0.509624] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568 [ 0.513086] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled [ 0.519109] omap_uart 44e09000.serial: no wakeirq for uart0 [ 0.519691] 44e09000.serial: ttyO0 at MMIO 0x44e09000 (irq = 88, base_baud = 3000000) is a OMAP UART0 [ 1.212068] console [ttyO0] enabled [ 1.221114] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20 [ 1.253833] brd: module loaded [ 1.273197] loop: module loaded [ 1.279721] mtdoops: mtd device (mtddev=name/number) must be supplied [ 1.289621] usbcore: registered new interface driver asix [ 1.295487] usbcore: registered new interface driver ax88179_178a [ 1.301980] usbcore: registered new interface driver cdc_ether [ 1.308269] usbcore: registered new interface driver smsc95xx [ 1.314388] usbcore: registered new interface driver net1080 [ 1.320444] usbcore: registered new interface driver cdc_subset [ 1.326767] usbcore: registered new interface driver zaurus [ 1.332806] usbcore: registered new interface driver cdc_ncm [ 1.340919] usbcore: registered new interface driver cdc_wdm [ 1.347170] usbcore: registered new interface driver usb-storage [ 1.353622] usbcore: registered new interface driver usbtest [ 1.364045] mousedev: PS/2 mouse device common for all mice [ 1.374760] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0 [ 1.382981] i2c /dev entries driver [ 1.386769] Driver for 1-wire Dallas network protocol. [ 1.398911] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec [ 1.408869] omap_hsmmc 48060000.mmc: unable to get vmmc regulator -517 [ 1.416459] platform 48060000.mmc: Driver omap_hsmmc requests probe deferral [ 1.424503] ledtrig-cpu: registered to indicate activity on CPUs [ 1.431429] usbcore: registered new interface driver usbhid [ 1.437293] usbhid: USB HID core driver [ 1.442582] oprofile: using arm/armv7 [ 1.447131] TCP: cubic registered [ 1.450611] Initializing XFRM netlink socket [ 1.455238] NET: Registered protocol family 17 [ 1.459968] NET: Registered protocol family 15 [ 1.465016] Key type dns_resolver registered [ 1.469680] omap_voltage_late_init: Voltage driver support not added [ 1.476366] sr_dev_init: No voltage domain specified for smartreflex0. Cannot initialize [ 1.484816] sr_dev_init: No voltage domain specified for smartreflex1. Cannot initialize [ 1.494347] ThumbEE CPU extension supported. [ 1.498923] Registering SWP/SWPB emulation handler [ 1.503942] SmartReflex Class3 initialized [ 1.517159] omap-gpmc 50000000.gpmc: GPMC revision 6.0 [ 1.524094] nand: device found, Manufacturer ID: 0xec, Chip ID: 0xd3 [ 1.530939] nand: Samsung NAND 1GiB 3,3V 8-bit [ 1.535638] nand: 1024MiB, SLC, page size: 2048, OOB size: 64 [ 1.541640] nand: error: CONFIG_MTD_NAND_OMAP_BCH not enabled [ 1.547760] omap2-nand: probe of omap2-nand.0 failed with error -22 [ 1.663619] tps65910 0-002d: No interrupt support, no core IRQ [ 1.680749] vrtc: 1800 mV [ 1.684124] vrtc: supplied by vbat [ 1.691498] vio: at 1500 mV [ 1.694737] vio: supplied by vbat [ 1.701644] vdd_mpu: 912 <--> 1312 mV at 1325 mV [ 1.706882] vdd_mpu: supplied by vbat [ 1.713875] vdd_core: 912 <--> 1150 mV at 1137 mV [ 1.719187] vdd_core: supplied by vbat [ 1.725964] vdd3: 5000 mV [ 1.731302] vdig1: at 1800 mV [ 1.734706] vdig1: supplied by vbat [ 1.741264] vdig2: at 1800 mV [ 1.744671] vdig2: supplied by vbat [ 1.751054] vpll: at 1800 mV [ 1.754365] vpll: supplied by vbat [ 1.760730] vdac: at 1800 mV [ 1.764036] vdac: supplied by vbat
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