使用SDK01.00.00.03:
uboot能够正常从SD卡启动，但是内核就无法生成mmcblk,只有个4G的EMMC的盘，看了下打印，是在mmc_send_op_cond（）这个函数里面出问题的，CMD 41没有反应，所以就无法生成对应的盘，也就无法挂在文件系统了。
打印信息如下：
U-Boot SPL 2014.07-gfb6ab76 (Jul 06 2015 - 16:00:22)
reading args
spl_load_image_fat_os: error reading image args, err - -1
reading u-boot.img
reading u-boot.img
U-Boot 2014.07-gfb6ab76 (Jul 06 2015 - 16:00:22)
I2C: ready
DRAM: 512 MiB
NAND: 0 MiB
MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
reading uboot.env
** Unable to read "uboot.env" from mmc0:1 **
Using default environment
Net: <ethaddr> not set. Validating first E-fuse MAC
cpsw, usb_ether
Hit any key to stop autoboot: 0
switch to partitions #0, OK
mmc0 is current device
SD/MMC found on device 0
reading uEnv.txt
** Unable to read file uEnv.txt **
4337416 bytes read in 272 ms (15.2 MiB/s)
32286 bytes read in 55 ms (573.2 KiB/s)
Kernel image @ 0x82000000 [ 0x000000 - 0x422f08 ]
## Flattened Device Tree blob at 88000000
Booting using the fdt blob at 0x88000000
Loading Device Tree to 8fff5000, end 8ffffe1d ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 3.14.43-g875c69b (zhenliang@UBUNTU) (gcc version 4.7.3 20130226 (prerelease) (crosstool-NG linaro-1.13.1-4.7-2013.03-20130313 - Linaro GCC 2013.03) ) #4 Mon Oct 24 12:04:24 CST 2016
[ 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 BeagleBone
[ 0.000000] cma: CMA: reserved 24 MiB at 9e000000
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] AM335X ES2.1 (sgx neon )
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129792
[ 0.000000] Kernel command line: console=ttyO0,115200n8 root=/dev/mmcblk0p2 ro rootfstype=ext4 rootwait
[ 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: 485192K/523264K available (5843K kernel code, 303K rwdata, 2144K rodata, 260K init, 232K bss, 38072K reserved, 0K highmem)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 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 - 0xc07d50c4 (7989 kB)
[ 0.000000] .init : 0xc07d6000 - 0xc081713c ( 261 kB)
[ 0.000000] .data : 0xc0818000 - 0xc0863da0 ( 304 kB)
[ 0.000000] .bss : 0xc0863da0 - 0xc089ddb8 ( 233 kB)
[ 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
[ 0.000011] sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns
[ 0.000027] OMAP clocksource: timer1 at 24000000 Hz
[ 0.000246] Console: colour dummy device 80x30
[ 0.000266] WARNING: Your 'console=ttyO0' has been replaced by 'ttyS0'
[ 0.000271] This ensures that you still see kernel messages. Please
[ 0.000276] update your kernel commandline.
[ 0.000293] Calibrating delay loop... 996.14 BogoMIPS (lpj=4980736)
[ 0.089554] pid_max: default: 32768 minimum: 301
[ 0.089639] Security Framework initialized
[ 0.089687] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.089697] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.095238] CPU: Testing write buffer coherency: ok
[ 0.095568] Setting up static identity map for 0x805baa20 - 0x805baa78
[ 0.096370] devtmpfs: initialized
[ 0.097900] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 3
[ 0.103477] omap_hwmod: tptc0 using broken dt data from edma
[ 0.103544] omap_hwmod: tptc1 using broken dt data from edma
[ 0.103602] omap_hwmod: tptc2 using broken dt data from edma
[ 0.107513] omap_hwmod: debugss: _wait_target_disable failed
[ 0.162089] pinctrl core: initialized pinctrl subsystem
[ 0.162938] regulator-dummy: no parameters
[ 0.164970] NET: Registered protocol family 16
[ 0.166621] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.168709] cpuidle: using governor ladder
[ 0.168723] cpuidle: using governor menu
[ 0.173872] syscon 44e10000.control_module: regmap [mem 0x44e10000-0x44e107fb] registered
[ 0.175089] platform 49000000.edma: alias fck already exists
[ 0.175109] platform 49000000.edma: alias fck already exists
[ 0.175121] platform 49000000.edma: alias fck already exists
[ 0.176064] OMAP GPIO hardware version 0.1
[ 0.187006] No ATAGs?
[ 0.187026] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.208374] bio: create slab <bio-0> at 0
[ 0.221462] edma-dma-engine edma-dma-engine.0: TI EDMA DMA engine driver
[ 0.222297] vmmcsd_fixed: 3300 mV
[ 0.224697] vgaarb: loaded
[ 0.225129] i2c-core: driver [palmas] using legacy suspend method
[ 0.225138] i2c-core: driver [palmas] using legacy resume method
[ 0.225718] SCSI subsystem initialized
[ 0.226935] usbcore: registered new interface driver usbfs
[ 0.227085] usbcore: registered new interface driver hub
[ 0.227240] usbcore: registered new device driver usb
[ 0.228036] omap_i2c 44e0b000.i2c: could not find pctldev for node /pinmux@44e10800/pinmux_i2c0_pins, deferring probe
[ 0.228061] platform 44e0b000.i2c: Driver omap_i2c requests probe deferral
[ 0.228370] pps_core: LinuxPPS API ver. 1 registered
[ 0.228379] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.228482] PTP clock support registered
[ 0.230154] omap-mailbox 480c8000.mailbox: omap mailbox rev 0x400
[ 0.230884] Advanced Linux Sound Architecture Driver Initialized.
[ 0.232229] Switched to clocksource timer1
[ 0.248049] NET: Registered protocol family 2
[ 0.248773] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.248815] TCP bind hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.248852] TCP: Hash tables configured (established 4096 bind 4096)
[ 0.248909] TCP: reno registered
[ 0.248918] UDP hash table entries: 256 (order: 0, 4096 bytes)
[ 0.248934] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)
[ 0.249093] NET: Registered protocol family 1
[ 0.249431] RPC: Registered named UNIX socket transport module.
[ 0.249440] RPC: Registered udp transport module.
[ 0.249446] RPC: Registered tcp transport module.
[ 0.249451] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.250345] hw perfevents: enabled with ARMv7 Cortex-A8 PMU driver, 5 counters available
[ 0.252696] futex hash table entries: 256 (order: -1, 3072 bytes)
[ 0.389404] VFS: Disk quotas dquot_6.5.2
[ 0.389463] Dquot-cache hash table entries: 1024 (order 0, 4096 bytes)
[ 0.389905] NFS: Registering the id_resolver key type
[ 0.389969] Key type id_resolver registered
[ 0.389976] Key type id_legacy registered
[ 0.390008] jffs2: version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc.
[ 0.390154] msgmni has been set to 995
[ 0.391333] NET: Registered protocol family 38
[ 0.391369] io scheduler noop registered
[ 0.391376] io scheduler deadline registered
[ 0.391400] io scheduler cfq registered (default)
[ 0.392909] pinctrl-single 44e10800.pinmux: 142 pins at pa f9e10800 size 568
[ 0.397200] Serial: 8250/16550 driver, 10 ports, IRQ sharing enabled
[ 0.401594] 44e09000.serial: ttyS0 at MMIO 0x44e09000 (irq = 88, base_baud = 3000000) is a 8250
[ 1.024521] console [ttyS0] enabled
[ 1.029553] omap_rng 48310000.rng: OMAP Random Number Generator ver. 20
[ 1.036572] [drm] Initialized drm 1.1.0 20060810
[ 1.050037] brd: module loaded
[ 1.057729] loop: module loaded
[ 1.061212] (hci_tty): inside hci_tty_init
[ 1.065772] (hci_tty): allocated 250, 0
[ 1.072026] mtdoops: mtd device (mtddev=name/number) must be supplied
[ 1.081542] usbcore: registered new interface driver asix
[ 1.087179] usbcore: registered new interface driver ax88179_178a
[ 1.093461] usbcore: registered new interface driver cdc_ether
[ 1.099487] usbcore: registered new interface driver smsc95xx
[ 1.105390] usbcore: registered new interface driver net1080
[ 1.111217] usbcore: registered new interface driver cdc_subset
[ 1.117283] usbcore: registered new interface driver zaurus
[ 1.123090] usbcore: registered new interface driver cdc_ncm
[ 1.129214] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 1.135799] ehci-pci: EHCI PCI platform driver
[ 1.140430] ehci-omap: OMAP-EHCI Host Controller driver
[ 1.146097] usbcore: registered new interface driver cdc_wdm
[ 1.151954] usbcore: registered new interface driver usb-storage
[ 1.158868] mousedev: PS/2 mouse device common for all mice
[ 1.166047] i2c-core: driver [rtc-ds1307] using legacy suspend method
[ 1.172553] i2c-core: driver [rtc-ds1307] using legacy resume method
[ 1.179645] omap_rtc 44e3e000.rtc: rtc core: registered 44e3e000.rtc as rtc0
[ 1.186839] 44e3e000.rtc: already running
[ 1.191487] i2c /dev entries driver
[ 1.195166] Driver for 1-wire Dallas network protocol.
[ 1.202389] omap_wdt: OMAP Watchdog Timer Rev 0x01: initial timeout 60 sec
[ 1.210523] omap_hsmmc 48060000.mmc: omap_hsmmc_probe
[ 1.252423] omap_hsmmc 481d8000.mmc: omap_hsmmc_probe
[ 1.297688] ledtrig-cpu: registered to indicate activity on CPUs
[ 1.304105] omap-aes 53500000.aes: OMAP AES hw accel rev: 3.2
[ 1.311160] omap-sham 53100000.sham: hw accel on OMAP rev 4.3
[ 1.321365] usbcore: registered new interface driver usbhid
[ 1.326994] usbhid: USB HID core driver
[ 1.331072] platform 44d00000.wkup_m3: Driver wkup_m3 requests probe deferral
[ 1.341273] oprofile: using arm/armv7
[ 1.345299] TCP: cubic registered
[ 1.348629] Initializing XFRM netlink socket
[ 1.353031] NET: Registered protocol family 17
[ 1.357541] mmc1: BKOPS_EN bit is not set
[ 1.361621] NET: Registered protocol family 15
[ 1.366224] Key type dns_resolver registered
[ 1.371187] cpu cpu0: of_pm_voltdm_notifier_register: Failed to get cpu0 regulator/voltdm: -517
[ 1.379979] cpu cpu0: cpu0 clock notifier not ready, retry
[ 1.385591] platform cpufreq-cpu0.0: Driver cpufreq-cpu0 requests probe deferral
[ 1.393620] PM: bootloader does not support rtc-only!
[ 1.398792] ThumbEE CPU extension supported.
[ 1.403185] Registering SWP/SWPB emulation handler
[ 1.409341] regulator-dummy: disabling
[ 1.413877] Error: Driver 'tfp410' is already registered, aborting...
只有一个EMMC的
[ 1.420419] mmc1: new high speed MMC card at address 0001
[ 1.426361] slave hdmi: could not get i2c
[ 1.430425] platform hdmi: Driver slave requests probe deferral
[ 1.436508] mmc _blk-alloc is start
[ 1.440219] ->mmcblk0
[ 1.442523] mmc _blk-alloc is end
[ 1.445854] mmcblk0: mmc1:0001 S10004 3.56 GiB
[ 1.451053] platform 4830e000.lcdc: Driver tilcdc requests probe deferral
[ 1.457974] ->mmcblk0boot0
[ 1.460697] mmcblk0boot0: mmc1:0001 S10004 partition 1 4.00 MiB
[ 1.467815] ->mmcblk0boot1
[ 1.470547] mmcblk0boot1: mmc1:0001 S10004 partition 2 4.00 MiB
[ 1.478715] mmcblk0: unknown partition table
[ 1.483967] DCDC1: at 1500 mV
[ 1.488587] vdd_mpu: 925 <--> 1375 mV at 1325 mV
[ 1.493987] mmcblk0boot1: unknown partition table
[ 1.499492] vdd_core: 925 <--> 1150 mV at 1125 mV
[ 1.505931] LDO1: at 1800 mV
[ 1.509546] mmcblk0boot0: unknown partition table
[ 1.514982] LDO2: at 3300 mV
[ 1.519065] LDO3: 1800 mV
[ 1.522796] LDO4: at 3300 mV
[ 1.526827] tps65217 0-0024: TPS65217 ID 0xe version 1.2
[ 1.532198] omap_i2c 44e0b000.i2c: bus 0 rev0.11 at 400 kHz
[ 1.538370] remoteproc0: wkup_m3 is available
[ 1.542877] remoteproc0: Note: remoteproc is still under development and considered experimental.
[ 1.551871] remoteproc0: THE BINARY FORMAT IS NOT YET FINALIZED, and backward compatibility isn't yet guaranteed.
[ 1.562388] remoteproc0: Direct firmware load failed with error -2
[ 1.568681] remoteproc0: Falling back to user helper
[ 1.574249] cpu cpu0: of_pm_voltdm_notifier_register: Fail calculating voltage latency[950000<->1325000]:-22
[ 1.704467] tilcdc 4830e000.lcdc: found TDA19988
[ 1.709889] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.716559] [drm] No driver support for vblank timestamp query.
[ 1.722864] tilcdc 4830e000.lcdc: No connectors reported connected with modes
[ 1.730041] [drm] Cannot find any crtc or sizes - going 1024x768
[ 1.748643] Console: switching to colour frame buffer device 128x48
[ 1.760280] tilcdc 4830e000.lcdc: fb0: frame buffer device
[ 1.765890] tilcdc 4830e000.lcdc: registered panic notifier
[ 1.771501] [drm] Initialized tilcdc 1.0.0 20121205 on minor 0
[ 1.842282] davinci_mdio 4a101000.mdio: davinci mdio revision 1.6
[ 1.848414] davinci_mdio 4a101000.mdio: detected phy mask fffffffe
[ 1.855246] libphy: 4a101000.mdio: probed
[ 1.859280] davinci_mdio 4a101000.mdio: phy[0]: device 4a101000.mdio:00, driver SMSC LAN8710/LAN8720
[ 1.869175] cpsw 4a100000.ethernet: Detected MACID = 04:a3:16:ad:44:bf
[ 1.877332] omap_rtc 44e3e000.rtc: setting system clock to 2000-01-01 01:38:40 UTC (946690720)
[ 1.891076] ALSA device list:
[ 1.894154] No soundcards found.
[ 1.898383] VFS: Cannot open root device "mmcblk0p2" or unknown-block(179,2): error -6
[ 1.906403] Please append a correct "root=" boot option; here are the available partitions:
[ 1.914835] b300 3735552 mmcblk0 driver: mmcblk
[ 1.920186] b310 4096 mmcblk0boot1 (driver?)
[ 1.925548] b308 4096 mmcblk0boot0 (driver?)
[ 1.930892] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(179,2)
[ 1.939370] drm_kms_helper: panic occurred, switching back to text console
