doc: sifive-fu540: Update README to explicitly load DTB for Linux

We should explicitly load DTB from TFTP server or MMC/SD card
for Linux booting. This will allow us:
1. To use different Linux DTB for SiFive Unleashed board with
   expansion board connected.
2. Avoid re-flashing OpenSBI firmware whenever board connections
   change.

This patch updates reference bootlog in SiFive FU540 README
as-per above.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Joe Hershberger <joe.hershberger@ni.com>

1 files changed, 222 insertions, 174 deletions

diff --git a/doc/board/sifive/fu540.rst b/doc/board/sifive/fu540.rst
index 594f1fe..7807f5b 100644
--- a/doc/board/sifive/fu540.rst
+++ b/doc/board/sifive/fu540.rst
@@ -17,6 +17,8 @@ The support for following drivers are already enabled:
 1. SiFive UART Driver.
 2. SiFive PRCI Driver for clock.
 3. Cadence MACB ethernet driver for networking support.
+4. SiFive SPI Driver.
+5. MMC SPI Driver for MMC/SD support.
 
 TODO:
 
@@ -48,14 +50,22 @@ Flashing
 
 The current U-Boot port is supported in S-mode only and loaded from DRAM.
 
-A prior stage (M-mode) firmware/bootloader (e.g OpenSBI or BBL) is required to
-load the u-boot.bin into memory and provide runtime services. The u-boot.bin
-can be given as a payload to the prior stage (M-mode) firmware/bootloader.
+A prior stage M-mode firmware/bootloader (e.g OpenSBI) is required to
+boot the u-boot.bin in S-mode and provide M-mode runtime services.
 
-The description of steps required to build the firmware is beyond the scope of
-this document. Please refer OpenSBI or BBL documenation.
+Currently, the u-boot.bin is used as a payload of the OpenSBI FW_PAYLOAD
+firmware. We need to compile OpenSBI with below command:
+
+.. code-block:: none
+
+    make PLATFORM=sifive/fu540 FW_PAYLOAD_PATH=<path to u-boot.bin> FW_PAYLOAD_FDT_PATH=<path to hifive-unleashed-a00.dtb from Linux>
+
+(Note: Prefer hifive-unleashed-a00.dtb from Linux-5.3 or higher)
+(Note: Linux-5.2 is also fine but it does not have ethernet DT node)
+
+More detailed description of steps required to build FW_PAYLOAD firmware
+is beyond the scope of this document. Please refer OpenSBI documenation.
 (Note: OpenSBI git repo is at https://github.com/riscv/opensbi.git)
-(Note: BBL git repo is at https://github.com/riscv/riscv-pk.git)
 
 Once the prior stage firmware/bootloader binary is generated, it should be
 copied to the first partition of the sdcard.
@@ -73,53 +83,70 @@ Sample boot log from HiFive Unleashed board
 
 .. code-block:: none
 
-   U-Boot 2019.01-00019-gc7953536-dirty (Jan 22 2019 - 11:05:40 -0800)
+   U-Boot 2019.07-00024-g350ff02f5b (Jul 22 2019 - 11:45:02 +0530)
 
    CPU:   rv64imafdc
-   Model: sifive,hifive-unleashed-a00
+   Model: SiFive HiFive Unleashed A00
    DRAM:  8 GiB
+   MMC:   spi@10050000:mmc@0: 0
    In:    serial@10010000
    Out:   serial@10010000
    Err:   serial@10010000
-   Net:
-   Warning: ethernet@10090000 (eth0) using random MAC address - b6:75:4d:48:50:94
-   eth0: ethernet@10090000
+   Net:   eth0: ethernet@10090000
    Hit any key to stop autoboot:  0
    => version
-   U-Boot 2019.01-00019-gc7953536-dirty (Jan 22 2019 - 11:05:40 -0800)
+   U-Boot 2019.07-00024-g350ff02f5b (Jul 22 2019 - 11:45:02 +0530)
 
    riscv64-linux-gcc.br_real (Buildroot 2018.11-rc2-00003-ga0787e9) 8.2.0
    GNU ld (GNU Binutils) 2.31.1
+   => mmc info
+   Device: spi@10050000:mmc@0
+   Manufacturer ID: 3
+   OEM: 5344
+   Name: SU08G
+   Bus Speed: 20000000
+   Mode: SD Legacy
+   Rd Block Len: 512
+   SD version 2.0
+   High Capacity: Yes
+   Capacity: 7.4 GiB
+   Bus Width: 1-bit
+   Erase Group Size: 512 Bytes
+   => mmc part
+
+   Partition Map for MMC device 0  --   Partition Type: EFI
+
+   Part    Start LBA       End LBA         Name
+           Attributes
+           Type GUID
+           Partition GUID
+     1     0x00000800      0x000107ff      "bootloader"
+           attrs:  0x0000000000000000
+           type:   2e54b353-1271-4842-806f-e436d6af6985
+           guid:   393bbd36-7111-491c-9869-ce24008f6403
+     2     0x00040800      0x00ecdfde      ""
+           attrs:  0x0000000000000000
+           type:   0fc63daf-8483-4772-8e79-3d69d8477de4
+           guid:   7fc9a949-5480-48c7-b623-04923080757f
 
 Now you can configure your networking, tftp server and use tftp boot method to
 load uImage.
 
 .. code-block:: none
 
-   => setenv ethaddr 70:B3:D5:92:F0:C2
-   => setenv ipaddr 10.196.157.189
-   => setenv serverip 10.11.143.218
-   => setenv gatewayip 10.196.156.1
+   => setenv ipaddr 10.206.7.133
    => setenv netmask 255.255.252.0
-   => bdinfo
-   boot_params = 0x0000000000000000
-   DRAM bank   = 0x0000000000000000
-   -> start    = 0x0000000080000000
-   -> size     = 0x0000000200000000
-   relocaddr   = 0x00000000fff90000
-   reloc off   = 0x000000007fd90000
-   ethaddr     = 70:B3:D5:92:F0:C2
-   IP addr     = 10.196.157.189
-   baudrate    = 115200 bps
-   => tftpboot uImage
+   => setenv serverip 10.206.4.143
+   => setenv gateway 10.206.4.1
+   => tftpboot ${kernel_addr_r} /sifive/fu540/Image
    ethernet@10090000: PHY present at 0
    ethernet@10090000: Starting autonegotiation...
    ethernet@10090000: Autonegotiation complete
-   ethernet@10090000: link up, 1000Mbps full-duplex (lpa: 0x3800)
+   ethernet@10090000: link up, 1000Mbps full-duplex (lpa: 0x3c00)
    Using ethernet@10090000 device
-   TFTP from server 10.11.143.218; our IP address is 10.196.157.189; sending through gateway 10.196.156.1
-   Filename 'uImage'.
-   Load address: 0x80200000
+   TFTP from server 10.206.4.143; our IP address is 10.206.7.133
+   Filename '/sifive/fu540/Image'.
+   Load address: 0x84000000
    Loading: #################################################################
             #################################################################
             #################################################################
@@ -146,175 +173,196 @@ load uImage.
             #################################################################
             #################################################################
             #################################################################
+            ##########################################
+            1.2 MiB/s
+   done
+   Bytes transferred = 8867100 (874d1c hex)
+   => tftpboot ${ramdisk_addr_r} /sifive/fu540/uRamdisk
+   ethernet@10090000: PHY present at 0
+   ethernet@10090000: Starting autonegotiation...
+   ethernet@10090000: Autonegotiation complete
+   ethernet@10090000: link up, 1000Mbps full-duplex (lpa: 0x3c00)
+   Using ethernet@10090000 device
+   TFTP from server 10.206.4.143; our IP address is 10.206.7.133
+   Filename '/sifive/fu540/uRamdisk'.
+   Load address: 0x88300000
+   Loading: #################################################################
             #################################################################
             #################################################################
             #################################################################
             #################################################################
             #################################################################
             #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            #################################################################
-            ##########################################################
-            2.5 MiB/s
+            ##############
+            418.9 KiB/s
+   done
+   Bytes transferred = 2398272 (249840 hex)
+   => tftpboot ${fdt_addr_r} /sifive/fu540/hifive-unleashed-a00.dtb
+   ethernet@10090000: PHY present at 0
+   ethernet@10090000: Starting autonegotiation...
+   ethernet@10090000: Autonegotiation complete
+   ethernet@10090000: link up, 1000Mbps full-duplex (lpa: 0x7c00)
+   Using ethernet@10090000 device
+   TFTP from server 10.206.4.143; our IP address is 10.206.7.133
+   Filename '/sifive/fu540/hifive-unleashed-a00.dtb'.
+   Load address: 0x88000000
+   Loading: ##
+            1000 Bytes/s
    done
-   Bytes transferred = 14939132 (e3f3fc hex)
-   => bootm 0x80200000 - 0x82200000
-   ## Booting kernel from Legacy Image at 80200000 ...
-      Image Name:   Linux
-      Image Type:   RISC-V Linux Kernel Image (uncompressed)
-      Data Size:    14939068 Bytes = 14.2 MiB
-      Load Address: 80200000
-      Entry Point:  80200000
+   Bytes transferred = 5614 (15ee hex)
+   => setenv bootargs "root=/dev/ram rw console=ttySIF0 ip=dhcp earlycon=sbi"
+   => booti ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
+   ## Loading init Ramdisk from Legacy Image at 88300000 ...
+      Image Name:   Linux RootFS
+      Image Type:   RISC-V Linux RAMDisk Image (uncompressed)
+      Data Size:    2398208 Bytes = 2.3 MiB
+      Load Address: 00000000
+      Entry Point:  00000000
       Verifying Checksum ... OK
-   ## Flattened Device Tree blob at 82200000
-      Booting using the fdt blob at 0x82200000
-      Loading Kernel Image ... OK
-      Using Device Tree in place at 0000000082200000, end 0000000082205c69
+   ## Flattened Device Tree blob at 88000000
+      Booting using the fdt blob at 0x88000000
+      Using Device Tree in place at 0000000088000000, end 00000000880045ed
 
    Starting kernel ...
 
    [    0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x80200000
-   [    0.000000] Linux version 5.0.0-rc1-00020-g4b51f736 (atish@jedi-01) (gcc version 7.2.0 (GCC)) #262 SMP Mon Jan 21 17:39:27 PST 2019
-   [    0.000000] initrd not found or empty - disabling initrd
+   [    0.000000] Linux version 5.3.0-rc1-00003-g460ac558152f (anup@anup-lab-machine) (gcc version 8.2.0 (Buildroot 2018.11-rc2-00003-ga0787e9)) #6 SMP Mon Jul 22 10:01:01 IST 2019
+   [    0.000000] earlycon: sbi0 at I/O port 0x0 (options '')
+   [    0.000000] printk: bootconsole [sbi0] enabled
+   [    0.000000] Initial ramdisk at: 0x(____ptrval____) (2398208 bytes)
    [    0.000000] Zone ranges:
    [    0.000000]   DMA32    [mem 0x0000000080200000-0x00000000ffffffff]
-   [    0.000000]   Normal   [mem 0x0000000100000000-0x000027ffffffffff]
+   [    0.000000]   Normal   [mem 0x0000000100000000-0x000000027fffffff]
    [    0.000000] Movable zone start for each node
    [    0.000000] Early memory node ranges
    [    0.000000]   node   0: [mem 0x0000000080200000-0x000000027fffffff]
    [    0.000000] Initmem setup node 0 [mem 0x0000000080200000-0x000000027fffffff]
    [    0.000000] software IO TLB: mapped [mem 0xfbfff000-0xfffff000] (64MB)
-   [    0.000000] CPU with hartid=0 has a non-okay status of "masked"
-   [    0.000000] CPU with hartid=0 has a non-okay status of "masked"
+   [    0.000000] CPU with hartid=0 is not available
+   [    0.000000] CPU with hartid=0 is not available
    [    0.000000] elf_hwcap is 0x112d
-   [    0.000000] percpu: Embedded 15 pages/cpu @(____ptrval____) s29720 r0 d31720 u61440
+   [    0.000000] percpu: Embedded 18 pages/cpu s34584 r8192 d30952 u73728
    [    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 2067975
-   [    0.000000] Kernel command line: earlyprintk
-   [    0.000000] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes)
-   [    0.000000] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes)
+   [    0.000000] Kernel command line: root=/dev/ram rw console=ttySIF0 ip=dhcp earlycon=sbi
+   [    0.000000] Dentry cache hash table entries: 1048576 (order: 11, 8388608 bytes, linear)
+   [    0.000000] Inode-cache hash table entries: 524288 (order: 10, 4194304 bytes, linear)
    [    0.000000] Sorting __ex_table...
-   [    0.000000] Memory: 8178760K/8386560K available (3309K kernel code, 248K rwdata, 872K rodata, 9381K init, 763K bss, 207800K reserved, 0K cma-reserved)
+   [    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
+   [    0.000000] Memory: 8182308K/8386560K available (5916K kernel code, 368K rwdata, 1840K rodata, 213K init, 304K bss, 204252K reserved, 0K cma-reserved)
    [    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=4, Nodes=1
    [    0.000000] rcu: Hierarchical RCU implementation.
-   [    0.000000] rcu:     RCU event tracing is enabled.
    [    0.000000] rcu:     RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=4.
-   [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
+   [    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 25 jiffies.
    [    0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=4
    [    0.000000] NR_IRQS: 0, nr_irqs: 0, preallocated irqs: 0
-   [    0.000000] plic: mapped 53 interrupts to 4 (out of 9) handlers.
+   [    0.000000] plic: mapped 53 interrupts with 4 handlers for 9 contexts.
    [    0.000000] riscv_timer_init_dt: Registering clocksource cpuid [0] hartid [1]
    [    0.000000] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1d854df40, max_idle_ns: 3526361616960 ns
-   [    0.000008] sched_clock: 64 bits at 1000kHz, resolution 1000ns, wraps every 2199023255500ns
-   [    0.000221] Console: colour dummy device 80x25
-   [    0.000902] printk: console [tty0] enabled
-   [    0.000963] Calibrating delay loop (skipped), value calculated using timer frequency.. 2.00 BogoMIPS (lpj=10000)
-   [    0.001034] pid_max: default: 32768 minimum: 301
-   [    0.001541] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes)
-   [    0.001912] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes)
-   [    0.003542] rcu: Hierarchical SRCU implementation.
-   [    0.004347] smp: Bringing up secondary CPUs ...
-   [    1.040259] CPU1: failed to come online
-   [    2.080483] CPU2: failed to come online
-   [    3.120699] CPU3: failed to come online
-   [    3.120765] smp: Brought up 1 node, 1 CPU
-   [    3.121923] devtmpfs: initialized
-   [    3.124649] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
-   [    3.124727] futex hash table entries: 1024 (order: 4, 65536 bytes)
-   [    3.125346] random: get_random_u32 called from bucket_table_alloc+0x72/0x172 with crng_init=0
-   [    3.125578] NET: Registered protocol family 16
-   [    3.126400] sifive-u54-prci 10000000.prci: Registered U54 core clocks
-   [    3.126649] sifive-gemgxl-mgmt 100a0000.cadence-gemgxl-mgmt: Registered clock switch 'cadence-gemgxl-mgmt'
-   [    3.135572] vgaarb: loaded
-   [    3.135858] SCSI subsystem initialized
-   [    3.136193] usbcore: registered new interface driver usbfs
-   [    3.136266] usbcore: registered new interface driver hub
-   [    3.136348] usbcore: registered new device driver usb
-   [    3.136446] pps_core: LinuxPPS API ver. 1 registered
-   [    3.136484] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
-   [    3.136575] PTP clock support registered
-   [    3.137256] clocksource: Switched to clocksource riscv_clocksource
-   [    3.142711] NET: Registered protocol family 2
-   [    3.143322] tcp_listen_portaddr_hash hash table entries: 4096 (order: 4, 65536 bytes)
-   [    3.143634] TCP established hash table entries: 65536 (order: 7, 524288 bytes)
-   [    3.145799] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
-   [    3.149121] TCP: Hash tables configured (established 65536 bind 65536)
-   [    3.149591] UDP hash table entries: 4096 (order: 5, 131072 bytes)
-   [    3.150094] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
-   [    3.150781] NET: Registered protocol family 1
-   [    3.230693] workingset: timestamp_bits=62 max_order=21 bucket_order=0
-   [    3.241224] io scheduler mq-deadline registered
-   [    3.241269] io scheduler kyber registered
-   [    3.242143] sifive_gpio 10060000.gpio: SiFive GPIO chip registered 16 GPIOs
-   [    3.242357] pwm-sifivem 10020000.pwm: Unable to find controller clock
-   [    3.242439] pwm-sifivem 10021000.pwm: Unable to find controller clock
-   [    3.243228] xilinx-pcie 2000000000.pci: PCIe Link is DOWN
-   [    3.243289] xilinx-pcie 2000000000.pci: host bridge /soc/pci@2000000000 ranges:
-   [    3.243360] xilinx-pcie 2000000000.pci:   No bus range found for /soc/pci@2000000000, using [bus 00-ff]
-   [    3.243447] xilinx-pcie 2000000000.pci:   MEM 0x40000000..0x5fffffff -> 0x40000000
-   [    3.243591] xilinx-pcie 2000000000.pci: PCI host bridge to bus 0000:00
-   [    3.243636] pci_bus 0000:00: root bus resource [bus 00-ff]
-   [    3.243676] pci_bus 0000:00: root bus resource [mem 0x40000000-0x5fffffff]
-   [    3.276547] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
-   [    3.277689] 10010000.serial: ttySIF0 at MMIO 0x10010000 (irq = 39, base_baud = 0) is a SiFive UART v0
-   [    3.786963] printk: console [ttySIF0] enabled
-   [    3.791504] 10011000.serial: ttySIF1 at MMIO 0x10011000 (irq = 40, base_baud = 0) is a SiFive UART v0
-   [    3.801251] sifive_spi 10040000.spi: mapped; irq=41, cs=1
-   [    3.806362] m25p80 spi0.0: unrecognized JEDEC id bytes: 9d, 70, 19
-   [    3.812084] m25p80: probe of spi0.0 failed with error -2
-   [    3.817453] sifive_spi 10041000.spi: mapped; irq=42, cs=4
-   [    3.823027] sifive_spi 10050000.spi: mapped; irq=43, cs=1
-   [    3.828604] libphy: Fixed MDIO Bus: probed
-   [    3.832623] macb: GEM doesn't support hardware ptp.
-   [    3.837196] libphy: MACB_mii_bus: probed
-   [    4.041156] Microsemi VSC8541 SyncE 10090000.ethernet-ffffffff:00: attached PHY driver [Microsemi VSC8541 SyncE] (mii_bus:phy_addr=10090000.ethernet-ffffffff:00, irq=POLL)
-   [    4.055779] macb 10090000.ethernet eth0: Cadence GEM rev 0x10070109 at 0x10090000 irq 12 (70:b3:d5:92:f0:c2)
-   [    4.065780] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
-   [    4.072033] ehci-pci: EHCI PCI platform driver
-   [    4.076521] usbcore: registered new interface driver usb-storage
-   [    4.082843] softdog: initialized. soft_noboot=0 soft_margin=60 sec soft_panic=0 (nowayout=0)
-   [    4.127465] mmc_spi spi2.0: SD/MMC host mmc0, no DMA, no WP, no poweroff
-   [    4.133645] usbcore: registered new interface driver usbhid
-   [    4.138980] usbhid: USB HID core driver
-   [    4.143017] NET: Registered protocol family 17
-   [    4.147885] pwm-sifivem 10020000.pwm: SiFive PWM chip registered 4 PWMs
-   [    4.153945] pwm-sifivem 10021000.pwm: SiFive PWM chip registered 4 PWMs
-   [    4.186407] Freeing unused kernel memory: 9380K
-   [    4.190224] This architecture does not have kernel memory protection.
-   [    4.196609] Run /init as init process
-   Starting logging: OK
-   Starting mdev...
-   [    4.303785] mmc0: host does not support reading read-only switch, assuming write-enable
-   [    4.311109] mmc0: new SDHC card on SPI
-   [    4.317103] mmcblk0: mmc0:0000 SS08G 7.40 GiB
-   [    4.386471]  mmcblk0: p1 p2
-   sort: /sys/devices/platform/Fixed: No such file or directory
-   modprobe: can't change directory to '/lib/modules': No such file or directory
-   Initializing random[    4.759075] random: dd: uninitialized urandom read (512 bytes read)
-    number generator... done.
-   Starting network...
-   udhcpc (v1.24.2) started
-   Sending discover...
-   Sending discover...
-   [    7.927510] macb 10090000.ethernet eth0: link up (1000/Full)
-   Sending discover...
-   Sending select for 10.196.157.190...
-   Lease of 10.196.157.190 obtained, lease time 499743
-   deleting routers
-   adding dns 10.86.1.1
-   adding dns 10.86.2.1
-   /etc/init.d/S50dropbear
-   Starting dropbear sshd: [   12.772393] random: dropbear: uninitialized urandom read (32 bytes read)
-   OK
-
-   Welcome to Buildroot
-   buildroot login:
+   [    0.000006] sched_clock: 64 bits at 1000kHz, resolution 1000ns, wraps every 2199023255500ns
+   [    0.008559] Console: colour dummy device 80x25
+   [    0.012989] Calibrating delay loop (skipped), value calculated using timer frequency.. 2.00 BogoMIPS (lpj=4000)
+   [    0.023104] pid_max: default: 32768 minimum: 301
+   [    0.028273] Mount-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
+   [    0.035765] Mountpoint-cache hash table entries: 16384 (order: 5, 131072 bytes, linear)
+   [    0.045307] rcu: Hierarchical SRCU implementation.
+   [    0.049875] smp: Bringing up secondary CPUs ...
+   [    0.055729] smp: Brought up 1 node, 4 CPUs
+   [    0.060599] devtmpfs: initialized
+   [    0.064819] random: get_random_u32 called from bucket_table_alloc.isra.10+0x4e/0x160 with crng_init=0
+   [    0.073720] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
+   [    0.083176] futex hash table entries: 1024 (order: 4, 65536 bytes, linear)
+   [    0.090721] NET: Registered protocol family 16
+   [    0.106319] vgaarb: loaded
+   [    0.108670] SCSI subsystem initialized
+   [    0.112515] usbcore: registered new interface driver usbfs
+   [    0.117758] usbcore: registered new interface driver hub
+   [    0.123167] usbcore: registered new device driver usb
+   [    0.128905] clocksource: Switched to clocksource riscv_clocksource
+   [    0.141239] NET: Registered protocol family 2
+   [    0.145506] tcp_listen_portaddr_hash hash table entries: 4096 (order: 4, 65536 bytes, linear)
+   [    0.153754] TCP established hash table entries: 65536 (order: 7, 524288 bytes, linear)
+   [    0.163466] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes, linear)
+   [    0.173468] TCP: Hash tables configured (established 65536 bind 65536)
+   [    0.179739] UDP hash table entries: 4096 (order: 5, 131072 bytes, linear)
+   [    0.186627] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes, linear)
+   [    0.194117] NET: Registered protocol family 1
+   [    0.198417] RPC: Registered named UNIX socket transport module.
+   [    0.203887] RPC: Registered udp transport module.
+   [    0.208664] RPC: Registered tcp transport module.
+   [    0.213429] RPC: Registered tcp NFSv4.1 backchannel transport module.
+   [    0.219944] PCI: CLS 0 bytes, default 64
+   [    0.224170] Unpacking initramfs...
+   [    0.262347] Freeing initrd memory: 2336K
+   [    0.266531] workingset: timestamp_bits=62 max_order=21 bucket_order=0
+   [    0.280406] NFS: Registering the id_resolver key type
+   [    0.284798] Key type id_resolver registered
+   [    0.289048] Key type id_legacy registered
+   [    0.293114] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
+   [    0.300262] NET: Registered protocol family 38
+   [    0.304432] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
+   [    0.311862] io scheduler mq-deadline registered
+   [    0.316461] io scheduler kyber registered
+   [    0.356421] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
+   [    0.363004] 10010000.serial: ttySIF0 at MMIO 0x10010000 (irq = 4, base_baud = 0) is a SiFive UART v0
+   [    0.371468] printk: console [ttySIF0] enabled
+   [    0.371468] printk: console [ttySIF0] enabled
+   [    0.380223] printk: bootconsole [sbi0] disabled
+   [    0.380223] printk: bootconsole [sbi0] disabled
+   [    0.389589] 10011000.serial: ttySIF1 at MMIO 0x10011000 (irq = 1, base_baud = 0) is a SiFive UART v0
+   [    0.398680] [drm] radeon kernel modesetting enabled.
+   [    0.412395] loop: module loaded
+   [    0.415214] sifive_spi 10040000.spi: mapped; irq=3, cs=1
+   [    0.420628] sifive_spi 10050000.spi: mapped; irq=5, cs=1
+   [    0.425897] libphy: Fixed MDIO Bus: probed
+   [    0.429964] macb 10090000.ethernet: Registered clk switch 'sifive-gemgxl-mgmt'
+   [    0.436743] macb: GEM doesn't support hardware ptp.
+   [    0.441621] libphy: MACB_mii_bus: probed
+   [    0.601316] Microsemi VSC8541 SyncE 10090000.ethernet-ffffffff:00: attached PHY driver [Microsemi VSC8541 SyncE] (mii_bus:phy_addr=10090000.ethernet-ffffffff:00, irq=POLL)
+   [    0.615857] macb 10090000.ethernet eth0: Cadence GEM rev 0x10070109 at 0x10090000 irq 6 (70:b3:d5:92:f2:f3)
+   [    0.625634] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
+   [    0.631381] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
+   [    0.637382] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
+   [    0.643799] ehci-pci: EHCI PCI platform driver
+   [    0.648261] ehci-platform: EHCI generic platform driver
+   [    0.653497] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
+   [    0.659599] ohci-pci: OHCI PCI platform driver
+   [    0.664055] ohci-platform: OHCI generic platform driver
+   [    0.669448] usbcore: registered new interface driver uas
+   [    0.674575] usbcore: registered new interface driver usb-storage
+   [    0.680642] mousedev: PS/2 mouse device common for all mice
+   [    0.709493] mmc_spi spi1.0: SD/MMC host mmc0, no DMA, no WP, no poweroff, cd polling
+   [    0.716615] usbcore: registered new interface driver usbhid
+   [    0.722023] usbhid: USB HID core driver
+   [    0.726738] NET: Registered protocol family 10
+   [    0.731359] Segment Routing with IPv6
+   [    0.734332] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
+   [    0.740687] NET: Registered protocol family 17
+   [    0.744660] Key type dns_resolver registered
+   [    0.806775] mmc0: host does not support reading read-only switch, assuming write-enable
+   [    0.814020] mmc0: new SDHC card on SPI
+   [    0.820137] mmcblk0: mmc0:0000 SU08G 7.40 GiB
+   [    0.850220]  mmcblk0: p1 p2
+   [    3.821524] macb 10090000.ethernet eth0: link up (1000/Full)
+   [    3.828938] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
+   [    3.848919] Sending DHCP requests .., OK
+   [    6.252076] IP-Config: Got DHCP answer from 10.206.4.1, my address is 10.206.7.133
+   [    6.259624] IP-Config: Complete:
+   [    6.262831]      device=eth0, hwaddr=70:b3:d5:92:f2:f3, ipaddr=10.206.7.133, mask=255.255.252.0, gw=10.206.4.1
+   [    6.272809]      host=dhcp-10-206-7-133, domain=sdcorp.global.sandisk.com, nis-domain=(none)
+   [    6.281228]      bootserver=10.206.126.11, rootserver=10.206.126.11, rootpath=
+   [    6.281232]      nameserver0=10.86.1.1, nameserver1=10.86.2.1
+   [    6.294179]      ntpserver0=10.86.1.1, ntpserver1=10.86.2.1
+   [    6.301026] Freeing unused kernel memory: 212K
+   [    6.304683] This architecture does not have kernel memory protection.
+   [    6.311121] Run /init as init process
+              _  _
+             | ||_|
+             | | _ ____  _   _  _  _
+             | || |  _ \| | | |\ \/ /
+             | || | | | | |_| |/    \
+             |_||_|_| |_|\____|\_/\_/
+
+                  Busybox Rootfs
+
+   Please press Enter to activate this console.
+   / #