On Tue, Jan 10, 2023 at 09:04:31PM -0500, Lwazi Dube wrote:
> My Pandaboard fails to enumerate a USB hard drive (used as a root
> device) and panics. Earlier, I had to add a 2s delay to make u-boot
> boot from "spinning" USB disks (flash drives are ok). OpenBSD needs
> the same change to make hard disk enumeration successful. The hard
> drive is plugged directly into one of the two pandaboard USB ports.
> When I dd the miniroot-panda-72.img snapshot onto the same disk, there
> is no panic and installation is successful. The panic (included at the
> end) happens after rebooting. Going through a powered hub panics too.
> Only a Y adapter to a port on another machine "fixes" the issue. Once
> the enumeration is over this "jumper cable" can be removed. With this
> patch, a single pandaboard USB port powers the disk reliably.
> Comments?
miod recently had a problem with pandaboard not reliably probing
the builtin USB Ethernet. The problem could not be reproduced
when using U-Boot from OpenBSD 6.6.
It seems to me uhub is the wrong place to make changes.
Any delay would be better placed in the omap4 specific omehci.c
and not for a specific product id.
The omap4 code doesn't use the clock functions for prcm and still has
part of the old pre-device tree table driven approach. A clock
not being configured or reset not happening could be part of the
problem.
>
> Thanks for reading.
> -Lwazi
>
> Index: sys/dev/usb/uhub.c
> ===================================================================
> RCS file: /cvs/src/sys/dev/usb/uhub.c,v
> retrieving revision 1.97
> diff -u -p -u -p -r1.97 uhub.c
> --- sys/dev/usb/uhub.c 4 Sep 2022 08:42:39 -0000 1.97
> +++ sys/dev/usb/uhub.c 11 Jan 2023 00:21:11 -0000
> @@ -44,6 +44,7 @@
> #include <dev/usb/usbdi.h>
> #include <dev/usb/usbdi_util.h>
> #include <dev/usb/usbdivar.h>
> +#include <dev/usb/usbdevs.h>
>
> #define UHUB_INTR_INTERVAL 255 /* ms */
>
> @@ -127,6 +128,7 @@ uhub_attach(struct device *parent, struc
> } hd;
> int p, port, nports, powerdelay;
> struct usbd_interface *iface = uaa->iface;
> + usb_device_descriptor_t *dd = usbd_get_device_descriptor(uaa->device);
> usb_endpoint_descriptor_t *ed;
> struct usbd_tt *tts = NULL;
> uint8_t ttthink = 0;
> @@ -169,6 +171,11 @@ uhub_attach(struct device *parent, struc
> err = usbd_get_hub_descriptor(dev, &hd.hs, 1);
> nports = hd.hs.bNbrPorts;
> powerdelay = (hd.hs.bPwrOn2PwrGood * UHD_PWRON_FACTOR);
> + /* Add extra time for Pandaboard to enable hard disk. */
> + if (UGETW(dd->idVendor) == USB_VENDOR_SMC2 &&
> + UGETW(dd->idProduct) == USB_PRODUCT_SMC2_LAN9514) {
> + powerdelay += 2000;
> + }
> ttthink = UGETW(hd.hs.wHubCharacteristics) & UHD_TT_THINK;
> if (!err && nports > 7)
> usbd_get_hub_descriptor(dev, &hd.hs, nports);
> Index: sys/dev/usb/usbdevs
> ===================================================================
> RCS file: /cvs/src/sys/dev/usb/usbdevs,v
> retrieving revision 1.752
> diff -u -p -u -p -r1.752 usbdevs
> --- sys/dev/usb/usbdevs 9 Nov 2022 10:03:04 -0000 1.752
> +++ sys/dev/usb/usbdevs 11 Jan 2023 00:21:11 -0000
> @@ -4223,6 +4223,7 @@ product SMC2 LAN7801 0x7801 LAN7801
> product SMC2 LAN7850 0x7850 LAN7850
> product SMC2 SMSC9500 0x9500 SMSC9500
> product SMC2 SMSC9505 0x9505 SMSC9505
> +product SMC2 LAN9514 0x9514 LAN9514
> product SMC2 LAN9530 0x9530 LAN9530
> product SMC2 LAN9730 0x9730 LAN9730
> product SMC2 SMSC9500_SAL10 0x9900 SMSC9500
> Index: sys/dev/usb/usbdevs.h
> ===================================================================
> RCS file: /cvs/src/sys/dev/usb/usbdevs.h,v
> retrieving revision 1.764
> diff -u -p -u -p -r1.764 usbdevs.h
> --- sys/dev/usb/usbdevs.h 9 Nov 2022 10:03:22 -0000 1.764
> +++ sys/dev/usb/usbdevs.h 11 Jan 2023 00:21:11 -0000
> @@ -1,4 +1,4 @@
> -/* $OpenBSD: usbdevs.h,v 1.764 2022/11/09 10:03:22 robert Exp $ */
> +/* $OpenBSD$ */
>
> /*
> * THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
> @@ -4230,6 +4230,7 @@
> #define USB_PRODUCT_SMC2_LAN7850 0x7850 /* LAN7850 */
> #define USB_PRODUCT_SMC2_SMSC9500 0x9500 /* SMSC9500 */
> #define USB_PRODUCT_SMC2_SMSC9505 0x9505 /* SMSC9505 */
> +#define USB_PRODUCT_SMC2_LAN9514 0x9514 /* LAN9514 */
> #define USB_PRODUCT_SMC2_LAN9530 0x9530 /* LAN9530 */
> #define USB_PRODUCT_SMC2_LAN9730 0x9730 /* LAN9730 */
> #define USB_PRODUCT_SMC2_SMSC9500_SAL10 0x9900 /* SMSC9500 */
> Index: sys/dev/usb/usbdevs_data.h
> ===================================================================
> RCS file: /cvs/src/sys/dev/usb/usbdevs_data.h,v
> retrieving revision 1.758
> diff -u -p -u -p -r1.758 usbdevs_data.h
> --- sys/dev/usb/usbdevs_data.h 9 Nov 2022 10:03:22 -0000 1.758
> +++ sys/dev/usb/usbdevs_data.h 11 Jan 2023 00:21:12 -0000
> @@ -1,4 +1,4 @@
> -/* $OpenBSD: usbdevs_data.h,v 1.758 2022/11/09 10:03:22 robert Exp $ */
> +/* $OpenBSD$ */
>
> /*
> * THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT.
> @@ -10872,6 +10872,10 @@ const struct usb_known_product usb_known
> {
> USB_VENDOR_SMC2, USB_PRODUCT_SMC2_SMSC9505,
> "SMSC9505",
> + },
> + {
> + USB_VENDOR_SMC2, USB_PRODUCT_SMC2_LAN9514,
> + "LAN9514",
> },
> {
> USB_VENDOR_SMC2, USB_PRODUCT_SMC2_LAN9530,
>
> ----------------------------------------
>
> OpenBSD/armv7 booting ...
> arg0 0xc0a2f7fc arg1 0x0 arg2 0xbcdf7000
> Allocating page tables
> IRQ stack: p0x80a5e000 v0xc0a5e000
> ABT stack: p0x80a5f000 v0xc0a5f000
> UND stack: p0x80a60000 v0xc0a60000
> SVC stack: p0x80a61000 v0xc0a61000
> Creating L1 page table at 0x80a30000
> Mapping kernel
> Constructing L2 page tables
> undefined page type 0x2 pa 0x80000000 va 0x80000000 pages 0x2000 attr 0x8
> type 0x7 pa 0x82000000 va 0x82000000 pages 0x5ee6 attr 0x8
> type 0x9 pa 0x87ee6000 va 0x87ee6000 pages 0x34 attr 0x8
> type 0x7 pa 0x87f1a000 va 0x87f1a000 pages 0x100e6 attr 0x8
> type 0x4 pa 0x98000000 va 0x98000000 pages 0x7800 attr 0x8
> type 0x7 pa 0x9f800000 va 0x9f800000 pages 0x1d5f7 attr 0x8
> type 0x2 pa 0xbcdf7000 va 0xbcdf7000 pages 0x18 attr 0x8
> type 0x4 pa 0xbce0f000 va 0xbce0f000 pages 0x1 attr 0x8
> type 0x7 pa 0xbce10000 va 0xbce10000 pages 0x1 attr 0x8
> type 0x2 pa 0xbce11000 va 0xbce11000 pages 0x100 attr 0x8
> type 0x1 pa 0xbcf11000 va 0xbcf11000 pages 0x1d attr 0x8
> type 0x4 pa 0xbcf2e000 va 0xbcf2e000 pages 0x8 attr 0x8
> type 0x6 pa 0xbcf36000 va 0xbcf36000 pages 0x1 attr 0x8000000000000008
> type 0x4 pa 0xbcf37000 va 0xbcf37000 pages 0x3 attr 0x8
> type 0x6 pa 0xbcf3a000 va 0xbcf3a000 pages 0x1 attr 0x8000000000000008
> type 0x4 pa 0xbcf3b000 va 0xbcf3b000 pages 0x1 attr 0x8
> type 0x6 pa 0xbcf3c000 va 0xbcf3c000 pages 0x2 attr 0x8000000000000008
> type 0x4 pa 0xbcf3e000 va 0xbcf3e000 pages 0x1 attr 0x8
> type 0x6 pa 0xbcf3f000 va 0xbcf3f000 pages 0x4 attr 0x8000000000000008
> type 0x4 pa 0xbcf43000 va 0xbcf43000 pages 0xc attr 0x8
> type 0x3 pa 0xbcf4f000 va 0xbcf4f000 pages 0x303f attr 0x8
> type 0x5 pa 0xbff8e000 va 0xbff8e000 pages 0x1 attr 0x8000000000000008
> type 0x3 pa 0xbff8f000 va 0xbff8f000 pages 0x71 attr 0x8
> pmap [ using 916808 bytes of bsd ELF symbol table ]
> Copyright (c) 1982, 1986, 1989, 1991, 1993
> The Regents of the University of California. All rights reserved.
> Copyright (c) 1995-2022 OpenBSD. All rights reserved. https://www.OpenBSD.org
>
> OpenBSD 7.2 (GENERIC) #71: Thu Sep 29 11:47:02 MDT 2022
> dera...@armv7.openbsd.org:/usr/src/sys/arch/armv7/compile/GENERIC
> real mem = 895234048 (853MB)
> avail mem = 868569088 (828MB)
> random: boothowto does not indicate good seed
> mainbus0 at root: TI OMAP4 PandaBoard-ES
> cpu0 at mainbus0 mpidr 0: ARM Cortex-A9 r2p10
> cpu0: 32KB 32b/line 4-way L1 VIPT I-cache, 32KB 32b/line 4-way L1 D-cache
> cortex0 at mainbus0
> amptimer0 at cortex0: 396000 kHz
> armliicc0 at cortex0: rtl 7 waymask: 0x0000000f
> omap0 at mainbus0
> omapid0 at omap0: omap4460
> amptimer0: adjusting clock: new rate 350000 kHz
> prcm0 at omap0 rev 0.0
> ampintc0 at mainbus0 nirq 160, ncpu 2: "interrupt-controller"
> omwugen0 at mainbus0
> simplebus0 at mainbus0: "ocp"
> omsysc0 at simplebus0: "target-module"
> omsysc1 at simplebus0: "target-module"
> omsysc2 at simplebus0: "target-module"
> "l3-noc" at simplebus0 not configured
> simplebus1 at simplebus0: "interconnect"
> simplebus2 at simplebus1: "segment"
> omsysc3 at simplebus2: "target-module"
> "counter" at omsysc3 not configured
> omsysc4 at simplebus2: "target-module"
> simplebus3 at omsysc4: "prm"
> omcm0 at simplebus3: "l4_wkup_cm"
> omclock0 at omcm0: "clk"
> omcm1 at simplebus3: "emu_sys_cm"
> omclock1 at omcm1: "clk"
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> "prm" at simplebus3 not configured
> omsysc5 at simplebus2: "target-module"
> "scrm" at omsysc5 not configured
> omsysc6 at simplebus2: "target-module"
> "scm" at omsysc6 not configured
> simplebus4 at simplebus1: "segment"
> omsysc7 at simplebus4: "target-module"
> omgpio0 at omsysc7: rev 0.1
> gpio0 at omgpio0: 32 pins
> omsysc8 at simplebus4: "target-module"
> omdog0 at omsysc8 rev 0.1
> omsysc9 at simplebus4: "target-module"
> "timer" at omsysc9 not configured
> omsysc10 at simplebus4: "target-module"
> "keypad" at omsysc10 not configured
> omsysc11 at simplebus4: "target-module"
> pinctrl0 at omsysc11
> simplebus5 at simplebus1: "segment"
> simplebus6 at simplebus0: "interconnect"
> simplebus7 at simplebus6: "segment"
> omsysc12 at simplebus7: "target-module"
> simplebus8 at omsysc12: "scm"
> syscon0 at simplebus8: "scm_conf"
> "control-phy" at simplebus8 not configured
> "control-phy" at simplebus8 not configured
> omsysc13 at simplebus7: "target-module"
> simplebus9 at omsysc13: "cm1"
> omcm2 at simplebus9: "mpuss_cm"
> omclock2 at omcm2: "clk"
> omcm3 at simplebus9: "tesla_cm"
> omclock3 at omcm3: "clk"
> omcm4 at simplebus9: "abe_cm"
> omclock4 at omcm4: "clk"
> omsysc14 at simplebus7: "target-module"
> simplebus10 at omsysc14: "cm2"
> omcm5 at simplebus10: "l4_ao_cm"
> omclock5 at omcm5: "clk"
> omcm6 at simplebus10: "l3_1_cm"
> omclock6 at omcm6: "clk"
> omcm7 at simplebus10: "l3_2_cm"
> omclock7 at omcm7: "clk"
> omcm8 at simplebus10: "ducati_cm"
> omclock8 at omcm8: "clk"
> omcm9 at simplebus10: "l3_dma_cm"
> omclock9 at omcm9: "clk"
> omcm10 at simplebus10: "l3_emif_cm"
> omclock10 at omcm10: "clk"
> omcm11 at simplebus10: "d2d_cm"
> omclock11 at omcm11: "clk"
> omcm12 at simplebus10: "l4_cfg_cm"
> omclock12 at omcm12: "clk"
> omcm13 at simplebus10: "l3_instr_cm"
> omclock13 at omcm13: "clk"
> omcm14 at simplebus10: "ivahd_cm"
> omclock14 at omcm14: "clk"
> omcm15 at simplebus10: "iss_cm"
> omclock15 at omcm15: "clk"
> omcm16 at simplebus10: "l3_dss_cm"
> omclock16 at omcm16: "clk"
> omcm17 at simplebus10: "l3_gfx_cm"
> omclock17 at omcm17: "clk"
> omcm18 at simplebus10: "l3_init_cm"
> omclock18 at omcm18: "clk"
> omcm19 at simplebus10: "l4_per_cm"
> omclock19 at omcm19: "clock"
> omclock20 at omcm19: "clock"
> omsysc15 at simplebus7: "target-module"
> "dma-controller" at omsysc15 not configured
> omsysc16 at simplebus7: "target-module"
> "hsi" at omsysc16 not configured
> omsysc17 at simplebus7: "target-module"
> "usbhstll" at omsysc17 not configured
> omsysc18 at simplebus7: "target-module"
> omehci0 at omsysc18
> PHY reset operation timed out
> usb0 at omehci0: USB revision 2.0
> uhub0 at usb0 configuration 1 interface 0 "TI OMAP EHCI root hub" rev
> 2.00/1.00 addr 1
> omsysc19 at simplebus7: "target-module"
> "mmu" at omsysc19 not configured
> simplebus11 at simplebus6: "segment"
> omsysc20 at simplebus11: "target-module"
> omsysc21 at simplebus11: "target-module"
> omsysc22 at simplebus11: "target-module"
> "usb_otg_hs" at omsysc22 not configured
> omsysc23 at simplebus11: "target-module"
> "ocp2scp" at omsysc23 not configured
> omsysc24 at simplebus11: "target-module"
> "smartreflex" at omsysc24 not configured
> omsysc25 at simplebus11: "target-module"
> "smartreflex" at omsysc25 not configured
> omsysc26 at simplebus11: "target-module"
> "smartreflex" at omsysc26 not configured
> omsysc27 at simplebus11: "target-module"
> "mailbox" at omsysc27 not configured
> omsysc28 at simplebus11: "target-module"
> "spinlock" at omsysc28 not configured
> simplebus12 at simplebus6: "segment"
> omsysc29 at simplebus12: "target-module"
> omsysc30 at simplebus12: "target-module"
> syscon1 at omsysc30: "omap4_padconf_global"
> pinctrl1 at omsysc30
> simplebus13 at simplebus6: "segment"
> simplebus14 at simplebus6: "segment"
> simplebus15 at simplebus6: "segment"
> simplebus16 at simplebus6: "segment"
> simplebus17 at simplebus0: "interconnect"
> simplebus18 at simplebus17: "segment"
> omsysc31 at simplebus18: "target-module"
> omsysc32 at simplebus18: "target-module"
> com0 at omsysc32: ti16750, 64 byte fifo
> com0: console
> omsysc33 at simplebus18: "target-module"
> "timer" at omsysc33 not configured
> omsysc34 at simplebus18: "target-module"
> "timer" at omsysc34 not configured
> omsysc35 at simplebus18: "target-module"
> "timer" at omsysc35 not configured
> omsysc36 at simplebus18: "target-module"
> "timer" at omsysc36 not configured
> omsysc37 at simplebus18: "target-module"
> omgpio1 at omsysc37: rev 0.1
> gpio1 at omgpio1: 32 pins
> omsysc38 at simplebus18: "target-module"
> omgpio2 at omsysc38: rev 0.1
> gpio2 at omgpio2: 32 pins
> omsysc39 at simplebus18: "target-module"
> omgpio3 at omsysc39: rev 0.1
> gpio3 at omgpio3: 32 pins
> omsysc40 at simplebus18: "target-module"
> omgpio4 at omsysc40: rev 0.1
> gpio4 at omgpio4: 32 pins
> omsysc41 at simplebus18: "target-module"
> omgpio5 at omsysc41: rev 0.1
> gpio5 at omgpio5: 32 pins
> omsysc42 at simplebus18: "target-module"
> tiiic0 at omsysc42 rev 0.11
> iic0 at tiiic0
> "ti,eeprom" at iic0 addr 0x50 not configured
> omsysc43 at simplebus18: "target-module"
> com1 at omsysc43: ti16750, 64 byte fifo
> com1: probed fifo depth: 0 bytes
> omsysc44 at simplebus18: "target-module"
> com2 at omsysc44: ti16750, 64 byte fifo
> com2: probed fifo depth: 0 bytes
> omsysc45 at simplebus18: "target-module"
> com3 at omsysc45: ti16750, 64 byte fifo
> com3: probed fifo depth: 0 bytes
> omsysc46 at simplebus18: "target-module"
> tiiic1 at omsysc46 rev 0.11
> iic1 at tiiic1
> "ti,twl6030" at iic1 addr 0x48 not configured
> "ti,twl6040" at iic1 addr 0x4b not configured
> omsysc47 at simplebus18: "target-module"
> tiiic2 at omsysc47 rev 0.11
> iic2 at tiiic2
> omsysc48 at simplebus18: "target-module"
> omsysc49 at simplebus18: "target-module"
> "timer" at omsysc49 not configured
> omsysc50 at simplebus18: "target-module"
> "timer" at omsysc50 not configured
> omsysc51 at simplebus18: "target-module"
> omrng0 at omsysc51
> omsysc52 at simplebus18: "target-module"
> omsysc53 at simplebus18: "target-module"
> "spi" at omsysc53 not configured
> omsysc54 at simplebus18: "target-module"
> "spi" at omsysc54 not configured
> omsysc55 at simplebus18: "target-module"
> ommmc0 at omsysc55
> sdmmc0 at ommmc0: 8-bit
> omsysc56 at simplebus18: "target-module"
> "des" at omsysc56 not configured
> omsysc57 at simplebus18: "target-module"
> omsysc58 at simplebus18: "target-module"
> "1w" at omsysc58 not configured
> omsysc59 at simplebus18: "target-module"
> omsysc60 at simplebus18: "target-module"
> "spi" at omsysc60 not configured
> omsysc61 at simplebus18: "target-module"
> "spi" at omsysc61 not configured
> omsysc62 at simplebus18: "target-module"
> omsysc63 at simplebus18: "target-module"
> ommmc1 at omsysc63
> sdmmc1 at ommmc1: 4-bit
> simplebus19 at simplebus17: "segment"
> omsysc64 at simplebus19: "target-module"
> tiiic3 at omsysc64 rev 0.11
> iic3 at tiiic3
> omsysc65 at simplebus0: "target-module"
> "mpu" at omsysc65 not configured
> simplebus20 at simplebus0: "interconnect"
> simplebus21 at simplebus20: "segment"
> omsysc66 at simplebus21: "target-module"
> omsysc67 at simplebus21: "target-module"
> omsysc68 at simplebus21: "target-module"
> "mcbsp" at omsysc68 not configured
> omsysc69 at simplebus21: "target-module"
> omsysc70 at simplebus21: "target-module"
> omsysc71 at simplebus21: "target-module"
> omsysc72 at simplebus21: "target-module"
> omdog1 at omsysc72 rev 0.0
> omsysc73 at simplebus21: "target-module"
> "mcpdm" at omsysc73 not configured
> omsysc74 at simplebus21: "target-module"
> "timer" at omsysc74 not configured
> omsysc75 at simplebus21: "target-module"
> "timer" at omsysc75 not configured
> omsysc76 at simplebus21: "target-module"
> "timer" at omsysc76 not configured
> omsysc77 at simplebus21: "target-module"
> "timer" at omsysc77 not configured
> omsysc78 at simplebus0: "target-module"
> "gpmc" at omsysc78 not configured
> omsysc79 at simplebus0: "target-module"
> "pmu" at omsysc79 not configured
> omsysc80 at simplebus0: "target-module"
> "mmu" at omsysc80 not configured
> omsysc81 at simplebus0: "target-module"
> "dmm" at omsysc81 not configured
> omsysc82 at simplebus0: "target-module"
> "emif" at omsysc82 not configured
> omsysc83 at simplebus0: "target-module"
> "emif" at omsysc83 not configured
> "dsp" at simplebus0 not configured
> "ipu" at simplebus0 not configured
> omsysc84 at simplebus0: "target-module"
> "aes" at omsysc84 not configured
> omsysc85 at simplebus0: "target-module"
> "aes" at omsysc85 not configured
> omsysc86 at simplebus0: "target-module"
> "sham" at omsysc86 not configured
> "regulator-abb-mpu" at simplebus0 not configured
> "regulator-abb-iva" at simplebus0 not configured
> omsysc87 at simplebus0: "target-module"
> "dss" at omsysc87 not configured
> omsysc88 at simplebus0: "target-module"
> "iva" at omsysc88 not configured
> "bandgap" at simplebus0 not configured
> sdmmc1: can't supply clock
> sdmmc1: can't enable card
> scsibus0 at sdmmc0: 2 targets, initiator 0
> sd0 at scsibus0 targ 1 lun 0: <SD/MMC, , 0010> removable
> sd0: 3823MB, 512 bytes/sector, 7829504 sectors
> uhub1 at uhub0 port 1 configuration 1 interface 0 "Standard
> Microsystems product 0x9514" rev 2.00/2.00 addr 2
> smsc0 at uhub1 port 1 configuration 1 interface 0 "Standard
> Microsystems SMSC9512/14" rev 2.00/2.00 addr 3
> smsc0: address 02:02:01:b3:12:a0
> ukphy0 at smsc0 phy 1: Generic IEEE 802.3u media interface, rev. 3:
> OUI 0x0001f0, model 0x000c
> uhub1: device problem, disabling port 2
> uhub2 at uhub1 port 3 configuration 1 interface 0 "Genesys Logic
> USB2.0 Hub" rev 2.00/7.02 addr 4
> vscsi0 at root
> scsibus1 at vscsi0: 256 targets
> softraid0 at root
> scsibus2 at softraid0: 256 targets
> bootfile: sd0a:/bsd
> boot device: sd0
> panic: root device (7d9db8caf760d407) not found
> Stopped at db_enter: ldrb r15, [r15, r15, ror r15]!
> TID PID UID PRFLAGS PFLAGS CPU COMMAND
> * 0 0 0 0x10000 0x200 0 swapper
> db_enter
> rlv=0xc071c350 rfp=0xc0a62fa8
> duid_format
> rlv=0xc054b730 rfp=0xc0a62fd0
> diskconf+0x148
> rlv=0xc03e4438 rfp=0xc0a62fe8
> main+0x454
> rlv=0xc05a5974 rfp=0xc0a62ffc
> start+0x58
> rlv=0xedfe0dd0 rfp=0xc05a5970
> Bad frame pointer: 0xc05a5970
> https://www.openbsd.org/ddb.html describes the minimum info required in bug
> reports. Insufficient info makes it difficult to find and fix bugs.
> ddb>
> ddb>
> ddb>
>
>
