Simulation hangs indefinitely with generated Linux binary #408
Description
Following the instructions presented on the README, I've generated a custom Linux binary with USB support. The buildroot configuration file used is the default litex_vexriscv_usbhost_defconfig with the addition of the micropython package by uncommenting the line as follows:
# Extra packages
#BR2_PACKAGE_DHRYSTONE_OPT=y
BR2_PACKAGE_MICROPYTHON=y
#BR2_PACKAGE_SPIDEV_TEST=y
#BR2_PACKAGE_MTD=y
#BR2_PACKAGE_MTD_JFFS_UTILS=y
After the generation, I ran sim.py, but it hung at
Run /init as init process
Below is the complete simulation log:
__ _ __ _ __
/ / (_) /____ | |/_/
/ /__/ / __/ -_)> <
/____/_/\__/\__/_/|_|
Build your hardware, easily!
(c) Copyright 2012-2024 Enjoy-Digital
(c) Copyright 2007-2015 M-Labs
BIOS built on Sep 29 2024 20:37:58
BIOS CRC passed (80d30a52)
LiteX git sha1: 87ee6ec3a
--=============== SoC ==================--
CPU: VexRiscv SMP-LINUX @ 100MHz
BUS: wishbone 32-bit @ 4GiB
CSR: 32-bit data
ROM: 64.0KiB
SRAM: 8.0KiB
SDRAM: 64.0MiB 32-bit @ 100MT/s (CL-2 CWL-2)
MAIN-RAM: 64.0MiB
--========== Initialization ============--
Initializing SDRAM @0x40000000...
Switching SDRAM to software control.
Switching SDRAM to hardware control.
--============== Boot ==================--
Booting from serial...
Press Q or ESC to abort boot completely.
sL5DdSMmkekro
Timeout
Executing booted program at 0x40f00000
--============= Liftoff! ===============--
OpenSBI v1.3
____ _____ ____ _____
/ __ \ / ____| _ \_ _|
| | | |_ __ ___ _ __ | (___ | |_) || |
| | | | '_ \ / _ \ '_ \ \___ \| _ < | |
| |__| | |_) | __/ | | |____) | |_) || |_
\____/| .__/ \___|_| |_|_____/|____/_____|
| |
|_|
Platform Name : LiteX / VexRiscv-SMP
Platform Features : medeleg
Platform HART Count : 8
Platform IPI Device : aclint-mswi
Platform Timer Device : aclint-mtimer @ 100000000Hz
Platform Console Device : litex_uart
Platform HSM Device : ---
Platform PMU Device : ---
Platform Reboot Device : ---
Platform Shutdown Device : ---
Platform Suspend Device : ---
Platform CPPC Device : ---
Firmware Base : 0x40f00000
Firmware Size : 376 KB
Firmware RW Offset : 0x40000
Firmware RW Size : 120 KB
Firmware Heap Offset : 0x52000
Firmware Heap Size : 48 KB (total), 3 KB (reserved), 8 KB (used), 36 KB (free)
Firmware Scratch Size : 4096 B (total), 452 B (used), 3644 B (free)
Runtime SBI Version : 1.0
Domain0 Name : root
Domain0 Boot HART : 0
Domain0 HARTs : 0*,1*,2*,3*,4*,5*,6*,7*
Domain0 Region00 : 0xf0018000-0xf001bfff M: (I,R,W) S/U: ()
Domain0 Region01 : 0xf0010000-0xf0017fff M: (I,R,W) S/U: ()
Domain0 Region02 : 0x40f40000-0x40f5ffff M: (R,W) S/U: ()
Domain0 Region03 : 0x40f00000-0x40f3ffff M: (R,X) S/U: ()
Domain0 Region04 : 0x00000000-0xffffffff M: (R,W,X) S/U: (R,W,X)
Domain0 Next Address : 0x40000000
Domain0 Next Arg1 : 0x40ef0000
Domain0 Next Mode : S-mode
Domain0 SysReset : yes
Domain0 SysSuspend : yes
Boot HART ID : 0
Boot HART Domain : root
Boot HART Priv Version : unknown
Boot HART Base ISA : rv32ima
Boot HART ISA Extensions : zicntr
Boot HART PMP Count : 0
Boot HART PMP Granularity : 0
Boot HART PMP Address Bits: 0
Boot HART MHPM Count : 0
Boot HART MIDELEG : 0x00000222
Boot HART MEDELEG : 0x0000b109
[ 0.000000] Linux version 6.9.0 (stark@eOS) (riscv32-buildroot-linux-gnu-gcc.br_real (Buildroot 2024.08-761-g09964bc5c0) 13.3.0, GNU ld (GNU Binutils) 2.42) #1 SMP Sun Sep 29 20:28:22 -03 2024
[ 0.000000] Machine model: sim
[ 0.000000] SBI specification v1.0 detected
[ 0.000000] SBI implementation ID=0x1 Version=0x10003
[ 0.000000] SBI TIME extension detected
[ 0.000000] SBI IPI extension detected
[ 0.000000] SBI RFENCE extension detected
[ 0.000000] earlycon: liteuart0 at I/O port 0x0 (options '')
[ 0.000000] Malformed early option 'console'
[ 0.000000] earlycon: liteuart0 at MMIO 0xf0001000 (options '')
[ 0.000000] printk: legacy bootconsole [liteuart0] enabled
[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
[ 0.000000] mmode_resv1@40f00000 (0x40f00000--0x40f40000) overlaps with opensbi@40f00000 (0x40f00000--0x40f80000)
[ 0.000000] OF: reserved mem: OVERLAP DETECTED!
[ 0.000000] opensbi@40f00000 (0x40f00000--0x40f80000) overlaps with mmode_resv0@40f40000 (0x40f40000--0x40f60000)
[ 0.000000] OF: reserved mem: 0x40f00000..0x40f3ffff (256 KiB) nomap non-reusable mmode_resv1@40f00000
[ 0.000000] OF: reserved mem: 0x40f00000..0x40f7ffff (512 KiB) map non-reusable opensbi@40f00000
[ 0.000000] OF: reserved mem: 0x40f40000..0x40f5ffff (128 KiB) nomap non-reusable mmode_resv0@40f40000
[ 0.000000] Zone ranges:
[ 0.000000] Normal [mem 0x0000000040000000-0x0000000043ffffff]
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000040000000-0x0000000040efffff]
[ 0.000000] node 0: [mem 0x0000000040f00000-0x0000000040f5ffff]
[ 0.000000] node 0: [mem 0x0000000040f60000-0x0000000043ffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000040000000-0x0000000043ffffff]
[ 0.000000] SBI HSM extension detected
[ 0.000000] riscv: base ISA extensions aim
[ 0.000000] riscv: ELF capabilities aim
[ 0.000000] percpu: Embedded 11 pages/cpu s23188 r0 d21868 u45056
[ 0.000000] Kernel command line: console=liteuart earlycon=liteuart,0xf0001000 rootwait root=/dev/ram0
[ 0.000000] Dentry cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
[ 0.000000] Inode-cache hash table entries: 4096 (order: 2, 16384 bytes, linear)
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 16256
[ 0.000000] mem auto-init: stack:all(zero), heap alloc:off, heap free:off
[ 0.000000] Memory: 46256K/65536K available (7488K kernel code, 599K rwdata, 1264K rodata, 271K init, 257K bss, 19280K reserved, 0K cma-reserved)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] rcu: Hierarchical RCU implementation.
[ 0.000000] rcu: RCU restricting CPUs from NR_CPUS=32 to nr_cpu_ids=1.
[ 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=1
[ 0.000000] NR_IRQS: 64, nr_irqs: 64, preallocated irqs: 0
[ 0.000000] riscv-intc: 32 local interrupts mapped
[ 0.000000] riscv: providing IPIs using SBI IPI extension
[ 0.000000] rcu: srcu_init: Setting srcu_struct sizes based on contention.
[ 0.000000] clocksource: riscv_clocksource: mask: 0xffffffffffffffff max_cycles: 0x171024e7e0, max_idle_ns: 440795205315 ns
[ 0.000026] sched_clock: 64 bits at 100MHz, resolution 10ns, wraps every 4398046511100ns
[ 0.003093] Console: colour dummy device 80x25
[ 0.004118] Calibrating delay loop (skipped), value calculated using timer frequency.. 200.00 BogoMIPS (lpj=400000)
[ 0.005042] pid_max: default: 32768 minimum: 301
[ 0.009969] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.010732] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.053466] ASID allocator using 9 bits (512 entries)
[ 0.058268] rcu: Hierarchical SRCU implementation.
[ 0.058732] rcu: Max phase no-delay instances is 1000.
[ 0.076128] smp: Bringing up secondary CPUs ...
[ 0.076784] smp: Brought up 1 node, 1 CPU
[ 0.088065] devtmpfs: initialized
[ 0.135744] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[ 0.137005] futex hash table entries: 256 (order: 2, 16384 bytes, linear)
[ 0.176482] NET: Registered PF_NETLINK/PF_ROUTE protocol family
[ 0.189512] DMA: preallocated 128 KiB GFP_KERNEL pool for atomic allocations
[ 0.306677] cpu0: Ratio of byte access time to unaligned word access is 0.00, unaligned accesses are slow
[ 0.323078] platform soc: Fixed dependency cycle(s) with /soc/interrupt-controller@f0c00000
[ 0.333364] platform soc: Fixed dependency cycle(s) with /soc/interrupt-controller@f0c00000
[ 0.377999] SCSI subsystem initialized
[ 0.381391] usbcore: registered new interface driver usbfs
[ 0.383013] usbcore: registered new interface driver hub
[ 0.385070] usbcore: registered new device driver usb
[ 0.389666] pps_core: LinuxPPS API ver. 1 registered
[ 0.390167] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <[email protected]>
[ 0.391269] PTP clock support registered
[ 0.397298] FPGA manager framework
[ 0.399441] Advanced Linux Sound Architecture Driver Initialized.
[ 0.420805] clocksource: Switched to clocksource riscv_clocksource
[ 0.773200] NET: Registered PF_INET protocol family
[ 0.778442] IP idents hash table entries: 2048 (order: 2, 16384 bytes, linear)
[ 0.790937] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 4096 bytes, linear)
[ 0.791812] Table-perturb hash table entries: 65536 (order: 6, 262144 bytes, linear)
[ 0.793207] TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
[ 0.794172] TCP bind hash table entries: 1024 (order: 2, 16384 bytes, linear)
[ 0.795174] TCP: Hash tables configured (established 1024 bind 1024)
[ 0.797071] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.798007] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[ 0.829863] Unpacking initramfs...
[ 0.839110] workingset: timestamp_bits=30 max_order=14 bucket_order=0
[ 0.850256] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 251)
[ 0.850861] io scheduler mq-deadline registered
[ 0.851382] io scheduler kyber registered
[ 0.852290] io scheduler bfq registered
[ 0.877329] riscv-plic f0c00000.interrupt-controller: mapped 32 interrupts with 1 handlers for 2 contexts.
[ 0.895044] LiteX SoC Controller driver initialized
[ 3.403317] Freeing initrd memory: 8192K
[ 4.435874] f0001000.serial: ttyLXU0 at MMIO 0x0 (irq = 12, base_baud = 0) is a liteuart
[ 4.437410] printk: legacy console [liteuart0] enabled
[ 4.437410] printk: legacy console [liteuart0] enabled
[ 4.438273] printk: legacy bootconsole [liteuart0] disabled
[ 4.438273] printk: legacy bootconsole [liteuart0] disabled
[ 4.474898] usbcore: registered new interface driver usb-storage
[ 4.478156] usbcore: registered new interface driver ftdi_sio
[ 4.479597] usbserial: USB Serial support registered for FTDI USB Serial Device
[ 4.482938] UDC core: g_audio: couldn't find an available UDC
[ 4.494943] mousedev: PS/2 mouse device common for all mice
[ 4.499015] i2c_dev: i2c /dev entries driver
[ 4.526705] usbcore: registered new interface driver usbhid
[ 4.527306] usbhid: USB HID core driver
[ 4.538164] usbcore: registered new interface driver snd-usb-audio
[ 4.545997] NET: Registered PF_INET6 protocol family
[ 4.571587] Segment Routing with IPv6
[ 4.574311] In-situ OAM (IOAM) with IPv6
[ 4.576898] sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
[ 4.595487] NET: Registered PF_PACKET protocol family
[ 5.147893] clk: Disabling unused clocks
[ 5.149155] ALSA device list:
[ 5.149634] No soundcards found.
[ 5.162803] Freeing unused kernel image (initmem) memory: 268K
[ 5.163429] Kernel memory protection not selected by kernel config.
[ 5.164185] Run /init as init process