Date: Mon, 27 May 2019 10:57:10 +0300 From: Michael Zhilin <mizhka@gmail.com> To: Balanga Bar <balanga.bar@gmail.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Re: Debugging a hang during boot Message-ID: <CAF19XBKPpOhe7g7WLpQ9NobkJc=u3R=XfZL4juu6P5MHP=LFDw@mail.gmail.com> In-Reply-To: <CADocevDudfQ9twD0WuBTCCmjV_TW28WWAptpFMh6eWtyr8RhaA@mail.gmail.com> References: <CADocevDudfQ9twD0WuBTCCmjV_TW28WWAptpFMh6eWtyr8RhaA@mail.gmail.com>
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Hi, As UART works, you can use DDB for debugging: https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-online-ddb.html To enter DDB there are a lot of ways: BREAK_TO_DEBUGGER or ALT_BREAK_TO_DEBUGGER can help you. Thanks! On Mon, May 27, 2019 at 12:30 AM Balanga Bar <balanga.bar@gmail.com> wrote: > Can anyone suggest how to go about debugging a hang during booting? > > I built a kernel for a GoFlex Home unit using DREAMPLUG-1001 without any > amendments. > > Here is my boot log:- > > ========================================================================== > > Booting [/boot/kernel/kernel]... > > > Using DTB compiled into kernel. > > > / - \ | Kernel entry at 0x1200180... > > > Kernel args: (null) > > > Copyright (c) 1992-2017 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California. All rights reserved. > FreeBSD is a registered trademark of The FreeBSD Foundation. > FreeBSD 11.1-RELEASE #0: Sun May 26 16:53:47 UTC 2019 > root@11-1:/usr/obj/arm.arm/usr/src/sys/DREAMPLUG-1001 arm > FreeBSD clang version 4.0.0 (tags/RELEASE_400/final 297347) (based on > LLVM 4.0.0) > CPU: Feroceon 88FR131 rev 1 (**unknown 4** core) > Little-endian DC enabled IC disabled WA disabled DC streaming enabled > BTB disabled L2 enabled L2 prefetch enabled > WB enabled LABT branch prediction disabled > 16KB/32B 4-way instruction cache > 16KB/32B 4-way write-back-locking-C data cache > real memory = 134213632 (127 MB) > avail memory = 121282560 (115 MB) > SOC: Marvell 88F6281 rev A1, TClock 200MHz > Instruction cache prefetch disabled, data cache prefetch disabled > 256KB 4-way set-associative write-through unified L2 cache > random: entropy device external interface > ofwbus0: <Open Firmware Device Tree> > simplebus0: <Flattened device tree simple bus> on ofwbus0 > cpulist0: <Open Firmware CPU Group> on ofwbus0 > cpu0: <Open Firmware CPU> on cpulist0 > localbus0: <Marvell device bus> on ofwbus0 > ic0: <Marvell Integrated Interrupt Controller> mem 0x20200-0x2023b on > simplebus0 > timer0: <Marvell CPU Timer> mem 0x20300-0x2032f irq 1 on simplebus0 > Event timer "CPUTimer0" frequency 200000000 Hz quality 1000 > Timecounter "CPUTimer1" frequency 200000000 Hz quality 1000 > gpio0: <Marvell Integrated GPIO Controller> mem 0x10100-0x1011f irq > 35,36,37,38,39,40,41 on simplebus0 > rtc0: <Marvell Integrated RTC> mem 0x10300-0x10307 on simplebus0 > twsi0: <Marvell Integrated I2C Bus Controller> mem 0x11000-0x1101f irq > 43 on simplebus0 > iicbus0: <Philips I2C bus> on twsi0 > iic0: <I2C generic I/O> on iicbus0 > mge0: <Marvell Gigabit Ethernet controller> mem 0x72000-0x73fff irq > 12,13,14,11,46 on simplebus0 > mge0: PHY0 attached, phy_sc points to mge0 > mge0: Ethernet address: 00:10:75:28:cc:00 > miibus0: <MII bus> on mge0 > e1000phy0: <Marvell 88E1116R Gigabit PHY> PHY 0 on miibus0 > e1000phy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, > 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto > mge1: <Marvell Gigabit Ethernet controller> mem 0x76000-0x77fff irq > 16,17,18,15,47 on simplebus0 > mge1: PHY1 attached, phy_sc points to mge0 > mge1: MII failed to find PHY > device_attach: mge1 attach returned 6 > uart0: <16550 or compatible> mem 0x12000-0x1201f irq 33 on simplebus0 > uart0: console (1056,n,8,1) > uart1: <16550 or compatible> mem 0x12100-0x1211f irq 34 on simplebus0 > cesa0: <Marvell Cryptographic Engine and Security Accelerator> mem > 0x30000-0x30fff,0x3d000-0x3dfff irq 22 on simplebus0 > ehci0: <Marvell Integrated USB 2.0 controller> mem 0x50000-0x50fff irq > 48,19 on simplebus0 > usbus0: EHCI version 1.0 > usbus0 on ehci0 > mvs0: <Marvell 88F6281 SATA controller> mem 0x80000-0x85fff irq 21 on > simplebus0 > mvs0: Gen-IIe, 2 3Gbps ports, Port Multiplier supported with FBS > mvsch0: <Marvell SATA channel> at channel 0 on mvs0 > mvsch1: <Marvell SATA channel> at channel 1 on mvs0 > cryptosoft0: <software crypto> > Timecounters tick every 10.000 msec > > usbus0: 480Mbps High Speed USB v2.0 > _______________________________________________ > freebsd-arm@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-arm > To unsubscribe, send any mail to "freebsd-arm-unsubscribe@freebsd.org" >
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