2021-07-01 04:54:19 +00:00
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.. SPDX-License-Identifier: GPL-2.0+
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Openpiton RISC-V SoC
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====================
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OpenPiton is an open source, manycore processor and research platform. It is a
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tiled manycore framework scalable from one to 1/2 billion cores. It supports a
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number of ISAs including RISC-V with its P-Mesh cache coherence protocol and
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networks on chip. It is highly configurable in both core and uncore components.
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OpenPiton has been verified in both ASIC and multiple Xilinx FPGA prototypes
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running full-stack Debian linux.
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RISC-V Standard Bootflow
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-------------------------
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2021-07-24 08:43:35 +00:00
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2021-07-01 04:54:19 +00:00
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Currently, OpenPiton implements RISC-V standard bootflow in the following steps
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mover.S -> u-boot-spl -> opensbi -> u-boot -> Linux
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This board supports S-mode u-boot as well as M-mode SPL
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Building OpenPition
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---------------------
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2021-07-24 08:43:35 +00:00
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2021-07-01 04:54:19 +00:00
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If you'd like to build OpenPiton, please go to OpenPiton github repo
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(at https://github.com/PrincetonUniversity/openpiton) to build from the latest
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changes
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Building Images
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2021-07-24 08:43:35 +00:00
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---------------
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2021-07-01 04:54:19 +00:00
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SPL
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2021-07-24 08:43:35 +00:00
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~~~
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2021-07-01 04:54:19 +00:00
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1. Add the RISC-V toolchain to your PATH.
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2. Setup ARCH & cross compilation environment variable:
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.. code-block:: none
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export CROSS_COMPILE=<riscv64 toolchain prefix>
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export ARCH=riscv
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3. make openpiton_riscv64_spl_defconfig
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4. make
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U-Boot
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2021-07-24 08:43:35 +00:00
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~~~~~~
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2021-07-01 04:54:19 +00:00
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1. Add the RISC-V toolchain to your PATH.
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2. Setup ARCH & cross compilation environment variable:
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.. code-block:: none
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export CROSS_COMPILE=<riscv64 toolchain prefix>
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export ARCH=riscv
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3. make openpiton_riscv64_defconfig
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4. make
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opensbi
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2021-07-24 08:43:35 +00:00
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~~~~~~~
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2021-07-01 04:54:19 +00:00
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1. Add the RISC-V toolchain to your PATH.
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2. Setup ARCH & cross compilation environment variable:
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.. code-block:: none
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export CROSS_COMPILE=<riscv64 toolchain prefix>
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export ARCH=riscv
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3. Go to OpenSBI directory
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4. make PLATFORM=fpga/openpiton FW_PAYLOAD_PATH=<path to u-boot-nodtb.bin>
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2021-07-24 08:43:35 +00:00
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Using fw_payload.bin with Linux
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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2021-07-01 04:54:19 +00:00
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Put the generated fw_payload.bin into the /boot directory on the root filesystem,
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plug in the SD card, then flash the bitstream. Linux will boot automatically.
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Booting
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-------
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Once you plugin the sdcard and power up, you should see the U-Boot prompt.
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Sample Dual-core Debian boot log from OpenPiton
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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2021-07-01 04:54:19 +00:00
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.. code-block:: none
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Trying to boot from MMC1
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OpenSBI v0.9-5-gd06cb61
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____ _____ ____ _____
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/ __ \ / ____| _ \_ _|
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| | | |_ __ ___ _ __ | (___ | |_) || |
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| | | | '_ \ / _ \ '_ \ \___ \| _ < | |
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| |__| | |_) | __/ | | |____) | |_) || |_
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\____/| .__/ \___|_| |_|_____/|____/_____|
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Platform Name : OPENPITON RISC-V
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Platform Features : timer,mfdeleg
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Platform HART Count : 3
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Firmware Base : 0x80000000
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Firmware Size : 104 KB
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Runtime SBI Version : 0.2
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Domain0 Name : root
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Domain0 Boot HART : 0
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Domain0 HARTs : 0*,1*,2*
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Domain0 Region00 : 0x0000000080000000-0x000000008001ffff ()
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Domain0 Region01 : 0x0000000000000000-0xffffffffffffffff (R,W,X)
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Domain0 Next Address : 0x0000000080200000
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Domain0 Next Arg1 : 0x0000000082200000
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Domain0 Next Mode : S-mode
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Domain0 SysReset : yes
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Boot HART ID : 0
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Boot HART Domain : root
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Boot HART ISA : rv64imafdcsu
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Boot HART Features : scounteren,mcounteren
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Boot HART PMP Count : 0
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Boot HART PMP Granularity : 0
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Boot HART PMP Address Bits: 0
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Boot HART MHPM Count : 0
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Boot HART MHPM Count : 0
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Boot HART MIDELEG : 0x0000000000000222
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Boot HART MEDELEG : 0x000000000000b109
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U-Boot 2021.01+ (Jun 12 2021 - 10:31:34 +0800)
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DRAM: 1 GiB
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MMC: sdhci@f000000000: 0 (eMMC)
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In: uart@fff0c2c000
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Out: uart@fff0c2c000
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Err: uart@fff0c2c000
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Hit any key to stop autoboot: 0
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6492992 bytes read in 5310 ms (1.2 MiB/s)
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## Flattened Device Tree blob at 86000000
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Booting using the fdt blob at 0x86000000
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Loading Device Tree to 00000000bfffa000, end 00000000bffff007 ... OK
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Starting kernel ...
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[ 0.000000] OF: fdt: Ignoring memory range 0x80000000 - 0x80200000
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[ 0.000000] Linux version 5.6.0-rc4-gb9d34f7e294d-dirty
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[ 0.000000] earlycon: sbi0 at I/O port 0x0 (options '')
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[ 0.000000] printk: bootconsole [sbi0] enabled
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[ 0.000000] Zone ranges:
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[ 0.000000] DMA32 [mem 0x0000000080200000-0x00000000bfffffff]
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[ 0.000000] Normal empty
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[ 0.000000] Movable zone start for each node
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[ 0.000000] Early memory node ranges
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[ 0.000000] node 0: [mem 0x0000000080200000-0x00000000bfffffff]
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[ 0.000000] Initmem setup node 0 [mem 0x0000000080200000-0x00000000bfffffff]
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[ 0.000000] On node 0 totalpages: 261632
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[ 0.000000] DMA32 zone: 4088 pages used for memmap
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[ 0.000000] DMA32 zone: 0 pages reserved
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[ 0.000000] DMA32 zone: 261632 pages, LIFO batch:63
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[ 0.000000] software IO TLB: mapped [mem 0xbaffa000-0xbeffa000] (64MB)
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[ 0.000000] SBI specification v0.2 detected
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[ 0.000000] SBI implementation ID=0x1 Version=0x9
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[ 0.000000] SBI v0.2 TIME extension detected
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[ 0.000000] SBI v0.2 IPI extension detected
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[ 0.000000] SBI v0.2 RFENCE extension detected
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[ 0.000000] SBI v0.2 HSM extension detected
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[ 0.000000] elf_hwcap is 0x112d
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[ 0.000000] percpu: Embedded 16 pages/cpu s25368 r8192 d31976 u65536
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[ 0.000000] pcpu-alloc: s25368 r8192 d31976 u65536 alloc=16*4096
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[ 0.000000] pcpu-alloc: [0] 0
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[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 257544
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[ 0.000000] Kernel command line: earlycon=sbi root=/dev/piton_sd1
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[ 0.000000] Dentry cache hash table entries: 131072 (order: 8, 1048576 bytes, linear)
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[ 0.000000] Inode-cache hash table entries: 65536 (order: 7, 524288 bytes, linear)
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[ 0.000000] Sorting __ex_table...
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[ 0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
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[ 0.000000] Memory: 956252K/1046528K available (4357K kernel code, 286K rwdata, 1200K rodata, 168K init, 311K bss, 90276K re)
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[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
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[ 0.000000] rcu: Hierarchical RCU implementation.
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[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=8 to nr_cpu_ids=1.
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[ 0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
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[ 0.000000] rcu: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
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[ 0.000000] NR_IRQS: 0, nr_irqs: 0, preallocated irqs: 0
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[ 0.000000] plic: mapped 2 interrupts with 1 handlers for 2 contexts.
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[ 0.000000] riscv_timer_init_dt: Registering clocksource cpuid [0] hartid [0]
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[ 0.000000] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x1ec037a6a, max_idle_ns: 7052723236599 ns
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[ 0.000138] sched_clock: 64 bits at 520kHz, resolution 1919ns, wraps every 4398046510738ns
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[ 0.009429] printk: console [hvc0] enabled
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[ 0.009429] printk: console [hvc0] enabled
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[ 0.017850] printk: bootconsole [sbi0] disabled
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[ 0.017850] printk: bootconsole [sbi0] disabled
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[ 0.028029] Calibrating delay loop (skipped), value calculated using timer frequency.. 1.04 BogoMIPS (lpj=5208)
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[ 0.038753] pid_max: default: 32768 minimum: 301
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[ 0.050248] Mount-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
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[ 0.058661] Mountpoint-cache hash table entries: 2048 (order: 2, 16384 bytes, linear)
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[ 0.069359] *** VALIDATE tmpfs ***
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[ 0.089093] *** VALIDATE proc ***
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[ 0.101135] *** VALIDATE cgroup ***
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[ 0.105019] *** VALIDATE cgroup2 ***
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[ 0.144310] rcu: Hierarchical SRCU implementation.
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[ 0.162836] smp: Bringing up secondary CPUs ...
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[ 0.167736] smp: Brought up 1 node, 1 CPU
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[ 0.185982] devtmpfs: initialized
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[ 0.216237] random: get_random_u32 called from bucket_table_alloc.isra.25+0x4e/0x15c with crng_init=0
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[ 0.236026] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
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[ 0.246916] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
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[ 0.266994] NET: Registered protocol family 16
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[ 0.763362] clocksource: Switched to clocksource riscv_clocksource
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[ 0.770122] *** VALIDATE bpf ***
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[ 0.782837] *** VALIDATE ramfs ***
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[ 0.829997] NET: Registered protocol family 2
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[ 0.853577] tcp_listen_portaddr_hash hash table entries: 512 (order: 1, 8192 bytes, linear)
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[ 0.864085] TCP established hash table entries: 8192 (order: 4, 65536 bytes, linear)
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[ 0.875373] TCP bind hash table entries: 8192 (order: 5, 131072 bytes, linear)
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[ 0.887958] TCP: Hash tables configured (established 8192 bind 8192)
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[ 0.902149] UDP hash table entries: 512 (order: 2, 16384 bytes, linear)
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[ 0.909904] UDP-Lite hash table entries: 512 (order: 2, 16384 bytes, linear)
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[ 0.924809] NET: Registered protocol family 1
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[ 0.948605] RPC: Registered named UNIX socket transport module.
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[ 0.956003] RPC: Registered udp transport module.
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[ 0.961565] RPC: Registered tcp transport module.
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[ 0.966432] RPC: Registered tcp NFSv4.1 backchannel transport module.
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[ 0.987180] Initialise system trusted keyrings
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[ 0.998953] workingset: timestamp_bits=46 max_order=18 bucket_order=0
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[ 1.323977] *** VALIDATE nfs ***
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[ 1.328520] *** VALIDATE nfs4 ***
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[ 1.334422] NFS: Registering the id_resolver key type
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[ 1.340148] Key type id_resolver registered
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[ 1.345280] Key type id_legacy registered
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[ 1.349820] nfs4filelayout_init: NFSv4 File Layout Driver Registering...
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[ 1.357610] Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
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[ 1.866909] Key type asymmetric registered
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[ 1.872460] Asymmetric key parser 'x509' registered
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[ 1.878750] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 254)
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[ 1.887480] io scheduler mq-deadline registered
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[ 1.892864] io scheduler kyber registered
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[ 3.905595] Serial: 8250/16550 driver, 4 ports, IRQ sharing disabled
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[ 3.954332] fff0c2c000.uart: ttyS0 at MMIO 0xfff0c2c000 (irq = 1, base_baud = 4166687) is a 16550
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[ 4.254794] loop: module loaded
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[ 4.258269] piton_sd:v1.0 Apr 26, 2019
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[ 4.258269]
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[ 4.265170] gpt partition table header:
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[ 4.265283] signature: 5452415020494645
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[ 4.269258] revision: 10000
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[ 4.273746] size: 5c
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[ 4.276659] crc_header: 26b42404
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[ 4.278911] reserved: 0
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[ 4.282730] current lba: 1
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[ 4.285311] backup lda: 3b723ff
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[ 4.288093] partition entries lba: 2
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[ 4.291835] number partition entries: 80
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[ 4.295529] size partition entries: 80
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[ 9.473253] piton_sd: piton_sd1
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[ 10.099676] libphy: Fixed MDIO Bus: probed
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[ 10.148782] NET: Registered protocol family 10
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[ 10.183418] Segment Routing with IPv6
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[ 10.189384] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
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[ 10.214449] NET: Registered protocol family 17
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[ 10.227413] Key type dns_resolver registered
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[ 10.240561] Loading compiled-in X.509 certificates
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[ 10.465264] EXT4-fs (piton_sd1): mounted filesystem with ordered data mode. Opts: (null)
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[ 10.475922] VFS: Mounted root (ext4 filesystem) readonly on device 254:1.
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[ 10.551865] devtmpfs: mounted
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[ 10.562744] Freeing unused kernel memory: 168K
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[ 10.567450] This architecture does not have kernel memory protection.
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[ 10.574688] Run /sbin/init as init process
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[ 10.578916] with arguments:
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[ 10.582489] /sbin/init
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[ 10.585312] with environment:
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[ 10.588518] HOME=/
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[ 10.591459] TERM=linux
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[ 18.154373] systemd[1]: System time before build time, advancing clock.
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[ 18.565415] systemd[1]: systemd 238 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIB)
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[ 18.596359] systemd[1]: Detected architecture riscv64.
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Welcome to Debian GNU/Linux buster/sid!
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[ 18.797150] systemd[1]: Set hostname to <openpiton>.
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[ 31.609244] random: systemd: uninitialized urandom read (16 bytes read)
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[ 31.630366] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
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[ OK ] Listening on /dev/initctl Compatibility Named Pipe.
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[ 31.674820] random: systemd: uninitialized urandom read (16 bytes read)
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[ 31.806800] systemd[1]: Created slice system-serial\x2dgetty.slice.
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[ OK ] Created slice system-serial\x2dgetty.slice.
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[ 31.839855] random: systemd: uninitialized urandom read (16 bytes read)
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[ 31.850670] systemd[1]: Reached target Slices.
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[ OK ] Reached target Slices.
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[ 32.128005] systemd[1]: Reached target Swap.
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[ OK ] Reached target Swap.
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[ 32.180337] systemd[1]: Listening on Journal Socket.
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[ OK ] Listening on Journal Socket.
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[ 32.416448] systemd[1]: Mounting Kernel Debug File System...
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Mounting Kernel Debug File System...
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[ 32.937934] systemd[1]: Starting Remount Root and Kernel File Systems...
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Starting Remount Root and Kernel File Systems...
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[ 33.117472] urandom_read: 4 callbacks suppressed
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[ 33.117645] random: systemd: uninitialized urandom read (16 bytes read)
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[ 33.214868] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
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[ OK ] Started Forward Password Requests to Wall Directory Watch.
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[ 33.366745] random: systemd: uninitialized urandom read (16 bytes read)
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[ 33.453262] systemd[1]: Listening on Journal Socket (/dev/log).
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[ OK ] Listening on Journal Socket (/dev/log).
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[ 33.627020] random: systemd: uninitialized urandom read (16 bytes read)
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[ 34.029973] systemd[1]: Starting Load Kernel Modules...
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Starting Load Kernel Modules...
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[ OK ] Created slice system-getty.slice.
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[ OK ] Started Dispatch Password Requests to Console Directory Watch.
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[ OK ] Reached target Local Encrypted Volumes.
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[ OK ] Reached target Paths.
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[ OK ] Reached target Remote File Systems.
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[ OK ] Listening on udev Kernel Socket.
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[ OK ] Listening on udev Control Socket.
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[ OK ] Reached target Sockets.
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Starting udev Coldplug all Devices...
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Starting Journal Service...
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[ 37.108761] systemd[1]: Starting Create Static Device Nodes in /dev...
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Starting Create Static Device Nodes in /dev...
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[ 37.941929] systemd[1]: Mounted Kernel Debug File System.
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[ OK ] Mounted Kernel Debug File System.
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[ 38.463855] systemd[1]: Started Remount Root and Kernel File Systems.
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[ OK ] Started Remount Root and Kernel File Systems.
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[ 39.614728] systemd[1]: Started Load Kernel Modules.
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[ OK ] Started Load Kernel Modules.
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[ 40.794332] systemd[1]: Starting Apply Kernel Variables...
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Starting Apply Kernel Variables...
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[ 41.928338] systemd[1]: Starting Load/Save Random Seed...
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Starting Load/Save Random Seed...
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[ 43.494757] systemd[1]: Started Create Static Device Nodes in /dev.
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[ OK ] Started Create Static Device Nodes in /dev.
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[ 44.795372] systemd[1]: Starting udev Kernel Device Manager...
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Starting udev Kernel Device Manager...
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[ 45.043065] systemd[1]: Reached target Local File Systems (Pre).
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[ OK ] Reached target Local File Systems (Pre).
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[ 45.224716] systemd[1]: Reached target Local File Systems.
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[ OK ] Reached target Local File Systems.
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[ 46.036491] systemd[1]: Started Apply Kernel Variables.
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[ OK ] Started Apply Kernel Variables.
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[ 46.947879] systemd[1]: Started Load/Save Random Seed.
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[ OK ] Started Load/Save Random Seed.
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[ 47.910242] systemd[1]: Starting Raise network interfaces...
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Starting Raise network interfaces...
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[ 48.119915] systemd[1]: Started Journal Service.
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[ OK ] Started Journal Service.
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Starting Flush Journal to Persistent Storage...
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[ OK ] Started udev Kernel Device Manager.
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[ 55.369915] systemd-journald[88]: Received request to flush runtime journal from PID 1
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[ OK ] Started Flush Journal to Persistent Storage.
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Starting Create Volatile Files and Directories...
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[ OK ] Started Raise network interfaces.
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[ OK ] Reached target Network.
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[FAILED] Failed to start Create Volatile Files and Directories.
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See 'systemctl status systemd-tmpfiles-setup.service' for details.
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Starting Update UTMP about System Boot/Shutdown...
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[FAILED] Failed to start Network Time Synchronization.
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See 'systemctl status systemd-timesyncd.service' for details.
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[ OK ] Reached target System Time Synchronized.
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[ OK ] Stopped Network Time Synchronization.
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[ OK ] Started udev Coldplug all Devices.
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[ OK ] Found device /dev/hvc0.
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[ OK ] Reached target System Initialization.
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[ OK ] Reached target Basic System.
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[ OK ] Started Regular background program processing daemon.
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[ OK ] Started Daily Cleanup of Temporary Directories.
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Starting Permit User Sessions...
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[ OK ] Started Daily apt download activities.
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[ OK ] Started Daily apt upgrade and clean activities.
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[ OK ] Reached target Timers.
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[ OK ] Started Permit User Sessions.
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[ OK ] Started Serial Getty on hvc0.
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[ OK ] Reached target Login Prompts.
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[ OK ] Reached target Multi-User System.
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[ OK ] Reached target Graphical Interface.
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Debian GNU/Linux buster/sid openpiton hvc0
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openpiton login:
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