arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) arm_gic: ACK 36 arm_gic: EOI 36 arm_gic: ACK no pending IRQ arm_gic: Set 36 pending mask 1 arm_gic: Raised pending IRQ 36 (cpu 0) pl061: dir = 0, data = 1 pl061: Changed input 0 = 1 pl061: istate = 01 chorler@linux-foxtrot:~/projects/build/buildroot> qemu-system-arm -M realview-pb-a8 -m 512 -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=sd -append "console=ttyAMA0,115200 root=/dev/mmcblk0 debug" -serial stdio WARNING: Image format was not specified for 'output/images/rootfs.ext2' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. pulseaudio: set_sink_input_volume() failed pulseaudio: Reason: Invalid argument pulseaudio: set_sink_input_mute() failed pulseaudio: Reason: Invalid argument Uncompressing Linux... done, booting the kernel. Booting Linux on physical CPU 0x0 Linux version 3.18.1 (chorler@linux-foxtrot.site) (gcc version 4.8.3 20140401 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.04 - Linaro GCC 4.8-2014.04) ) #1 Fri Jan 9 16:44:04 GMT 2015 CPU: ARMv7 Processor [410fc080] revision 0 (ARMv7), cr=10c53c7d CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache Machine: ARM-RealView PB-A8 Ignoring unrecognised tag 0x00000000 Memory policy: Data cache writeback On node 0 totalpages: 131072 free_area_init_node: node 0, pgdat c0434bac, node_mem_map dfbf9000 Normal zone: 1024 pages used for memmap Normal zone: 0 pages reserved Normal zone: 131072 pages, LIFO batch:31 CPU: All CPU(s) started in SVC mode. sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 pcpu-alloc: [0] 0 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 Kernel command line: console=ttyAMA0,115200 root=/dev/mmcblk0 debug PID hash table entries: 2048 (order: 1, 8192 bytes) Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 515296K/524288K available (3056K kernel code, 163K rwdata, 936K rodata, 132K init, 125K bss, 8992K reserved) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xffe00000 (2048 kB) vmalloc : 0xe0800000 - 0xff000000 ( 488 MB) lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) modules : 0xbf000000 - 0xc0000000 ( 16 MB) .text : 0xc0008000 - 0xc03ee2ac (3993 kB) .init : 0xc03ef000 - 0xc0410000 ( 132 kB) .data : 0xc0410000 - 0xc0438d00 ( 164 kB) .bss : 0xc0438d00 - 0xc04582d8 ( 126 kB) NR_IRQS:96 Console: colour dummy device 80x30 Calibrating delay loop... 197.42 BogoMIPS (lpj=987136) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok Setting up static identity map for 0x702e8490 - 0x702e84e8 devtmpfs: initialized VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 0 NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations Serial: AMBA PL011 UART driver uart-pl011 dev:uart0: ttyAMA0 at MMIO 0x10009000 (irq = 44, base_baud = 0) is a PL011 rev1 console [ttyAMA0] enabled uart-pl011 dev:uart1: ttyAMA1 at MMIO 0x1000a000 (irq = 45, base_baud = 0) is a PL011 rev1 uart-pl011 dev:uart2: ttyAMA2 at MMIO 0x1000b000 (irq = 46, base_baud = 0) is a PL011 rev1 uart-pl011 fpga:uart3: ttyAMA3 at MMIO 0x1000c000 (irq = 47, base_baud = 0) is a PL011 rev1 Advanced Linux Sound Architecture Driver Initialized. Switched to clocksource timer3 NET: Registered protocol family 2 TCP established hash table entries: 4096 (order: 2, 16384 bytes) TCP bind hash table entries: 4096 (order: 2, 16384 bytes) TCP: Hash tables configured (established 4096 bind 4096) TCP: reno registered UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. futex hash table entries: 256 (order: -1, 3072 bytes) msgmni has been set to 1006 io scheduler noop registered io scheduler deadline registered (default) pl061_gpio dev:gpio0: invalid IRQ base in pdata pl061_gpio dev:gpio1: invalid IRQ base in pdata pl061_gpio dev:gpio2: invalid IRQ base in pdata clcd-pl11x issp:clcd: PL111 rev2 at 0x10020000 clcd-pl11x issp:clcd: RealView hardware, XVGA display Console: switching to colour frame buffer device 128x48 loop: module loaded physmap platform flash device: 04000000 at 40000000 physmap-flash physmap-flash.0: map_probe failed libphy: smsc911x-mdio: probed smsc911x smsc911x.0 eth0: attached PHY driver [SMSC LAN911x Internal PHY] (mii_bus:phy_addr=smsc911x-0:01, irq=-1) smsc911x smsc911x.0 eth0: MAC Address: 52:54:00:12:34:56 mousedev: PS/2 mouse device common for all mice rtc-ds1307 0-0068: rtc core: registered ds1338 as rtc0 rtc-ds1307 0-0068: 56 bytes nvram rtc-pl031 dev:rtc: rtc core: registered pl031 as rtc1 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral ledtrig-cpu: registered to indicate activity on CPUs input: AT Raw Set 2 keyboard as /devices/fpga:kmi0/serio0/input/input0 aaci-pl041 fpga:aaci: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 51 aaci-pl041 fpga:aaci: FIFO 512 entries TCP: cubic registered NET: Registered protocol family 17 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral rtc-ds1307 0-0068: setting system clock to 2015-01-10 10:23:02 UTC (1420885382) ALSA device list: #0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 51 input: ImExPS/2 Generic Explorer Mouse as /devices/fpga:kmi1/serio1/input/input2 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral VFS: Cannot open root device "mmcblk0" or unknown-block(0,0): error -6 Please append a correct "root=" boot option; here are the available partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.1 #1 [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (panic+0x90/0x1e4) [] (panic) from [] (mount_block_root+0x1d0/0x260) [] (mount_block_root) from [] (mount_root+0x108/0x110) [] (mount_root) from [] (prepare_namespace+0x158/0x19c) [] (prepare_namespace) from [] (kernel_init_freeable+0x1b4/0x1c4) [] (kernel_init_freeable) from [] (kernel_init+0xc/0xe8) [] (kernel_init) from [] (ret_from_fork+0x14/0x3c) ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) random: nonblocking pool is initialized chorler@linux-foxtrot:~/projects/build/buildroot> find output/build/linux-3.18.1/drivers/ | grep gic output/build/linux-3.18.1/drivers/irqchip/irq-gic-common.c output/build/linux-3.18.1/drivers/irqchip/irq-gic.o output/build/linux-3.18.1/drivers/irqchip/.irq-gic-common.o.cmd output/build/linux-3.18.1/drivers/irqchip/irq-gic-common.o output/build/linux-3.18.1/drivers/irqchip/irq-gic-common.h output/build/linux-3.18.1/drivers/irqchip/irq-gic-v3.c output/build/linux-3.18.1/drivers/irqchip/irq-gic.c output/build/linux-3.18.1/drivers/irqchip/.irq-gic.o.cmd output/build/linux-3.18.1/drivers/staging/netlogic output/build/linux-3.18.1/drivers/staging/netlogic/Makefile output/build/linux-3.18.1/drivers/staging/netlogic/xlr_net.c output/build/linux-3.18.1/drivers/staging/netlogic/platform_net.c output/build/linux-3.18.1/drivers/staging/netlogic/platform_net.h output/build/linux-3.18.1/drivers/staging/netlogic/xlr_net.h output/build/linux-3.18.1/drivers/staging/netlogic/TODO output/build/linux-3.18.1/drivers/staging/netlogic/Kconfig output/build/linux-3.18.1/drivers/hid/hid-uclogic.c output/build/linux-3.18.1/drivers/hid/hid-magicmouse.c output/build/linux-3.18.1/drivers/scsi/qlogicpti.c output/build/linux-3.18.1/drivers/scsi/BusLogic.h output/build/linux-3.18.1/drivers/scsi/qlogicpti.h output/build/linux-3.18.1/drivers/scsi/qlogicfas408.h output/build/linux-3.18.1/drivers/scsi/qlogicfas.c output/build/linux-3.18.1/drivers/scsi/BusLogic.c output/build/linux-3.18.1/drivers/scsi/qlogicfas408.c output/build/linux-3.18.1/drivers/scsi/pcmcia/qlogic_stub.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_io.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/Makefile output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_vnic.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ctx.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sysfs.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_hdr.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_dcb.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlcnic/qlcnic_init.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/Makefile output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_hdr.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/Makefile output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_ethtool.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_ctx.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_init.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/netxen/netxen_nic_main.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/Makefile output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/qlge_mpi.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/qlge_main.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/qlge_dbg.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/qlge_ethtool.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qlge/qlge.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qla3xxx.c output/build/linux-3.18.1/drivers/net/ethernet/qlogic/qla3xxx.h output/build/linux-3.18.1/drivers/net/ethernet/qlogic/Kconfig chorler@linux-foxtrot:~/projects/build/buildroot> view output/build/linux-3.18.1/drivers/irqchip/irq-gic.c chorler@linux-foxtrot:~/projects/build/buildroot> qemu-system-arm -M realview-pb-a8 -m 512 -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=sd -append "console=ttyAMA0,115200 root=/dev/mmcblk0 debug" -serial stdio WARNING: Image format was not specified for 'output/images/rootfs.ext2' and probing guessed raw. Automatically detecting the format is dangerous for raw images, write operations on block 0 will be restricted. Specify the 'raw' format explicitly to remove the restrictions. pulseaudio: set_sink_input_volume() failed pulseaudio: Reason: Invalid argument pulseaudio: set_sink_input_mute() failed pulseaudio: Reason: Invalid argument Uncompressing Linux... done, booting the kernel. Booting Linux on physical CPU 0x0 Linux version 3.18.1 (chorler@linux-foxtrot.site) (gcc version 4.8.3 20140401 (prerelease) (crosstool-NG linaro-1.13.1-4.8-2014.04 - Linaro GCC 4.8-2014.04) ) #1 Fri Jan 9 16:44:04 GMT 2015 CPU: ARMv7 Processor [410fc080] revision 0 (ARMv7), cr=10c53c7d CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache Machine: ARM-RealView PB-A8 Ignoring unrecognised tag 0x00000000 Memory policy: Data cache writeback On node 0 totalpages: 131072 free_area_init_node: node 0, pgdat c0434bac, node_mem_map dfbf9000 Normal zone: 1024 pages used for memmap Normal zone: 0 pages reserved Normal zone: 131072 pages, LIFO batch:31 CPU: All CPU(s) started in SVC mode. sched_clock: 32 bits at 24MHz, resolution 41ns, wraps every 178956969942ns pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 pcpu-alloc: [0] 0 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 130048 Kernel command line: console=ttyAMA0,115200 root=/dev/mmcblk0 debug PID hash table entries: 2048 (order: 1, 8192 bytes) Dentry cache hash table entries: 65536 (order: 6, 262144 bytes) Inode-cache hash table entries: 32768 (order: 5, 131072 bytes) Memory: 515296K/524288K available (3056K kernel code, 163K rwdata, 936K rodata, 132K init, 125K bss, 8992K reserved) Virtual kernel memory layout: vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xffc00000 - 0xffe00000 (2048 kB) vmalloc : 0xe0800000 - 0xff000000 ( 488 MB) lowmem : 0xc0000000 - 0xe0000000 ( 512 MB) modules : 0xbf000000 - 0xc0000000 ( 16 MB) .text : 0xc0008000 - 0xc03ee2ac (3993 kB) .init : 0xc03ef000 - 0xc0410000 ( 132 kB) .data : 0xc0410000 - 0xc0438d00 ( 164 kB) .bss : 0xc0438d00 - 0xc04582d8 ( 126 kB) NR_IRQS:96 GIC CPU mask not found - kernel will fail to boot. GIC CPU mask not found - kernel will fail to boot. Console: colour dummy device 80x30 Calibrating delay loop... 219.54 BogoMIPS (lpj=1097728) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 1024 (order: 0, 4096 bytes) Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes) CPU: Testing write buffer coherency: ok Setting up static identity map for 0x702e8490 - 0x702e84e8 devtmpfs: initialized VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 0 NET: Registered protocol family 16 DMA: preallocated 256 KiB pool for atomic coherent allocations Serial: AMBA PL011 UART driver uart-pl011 dev:uart0: ttyAMA0 at MMIO 0x10009000 (irq = 44, base_baud = 0) is a PL011 rev1 console [ttyAMA0] enabled uart-pl011 dev:uart1: ttyAMA1 at MMIO 0x1000a000 (irq = 45, base_baud = 0) is a PL011 rev1 uart-pl011 dev:uart2: ttyAMA2 at MMIO 0x1000b000 (irq = 46, base_baud = 0) is a PL011 rev1 uart-pl011 fpga:uart3: ttyAMA3 at MMIO 0x1000c000 (irq = 47, base_baud = 0) is a PL011 rev1 Advanced Linux Sound Architecture Driver Initialized. Switched to clocksource timer3 NET: Registered protocol family 2 TCP established hash table entries: 4096 (order: 2, 16384 bytes) TCP bind hash table entries: 4096 (order: 2, 16384 bytes) TCP: Hash tables configured (established 4096 bind 4096) TCP: reno registered UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. futex hash table entries: 256 (order: -1, 3072 bytes) msgmni has been set to 1006 io scheduler noop registered io scheduler deadline registered (default) pl061_gpio dev:gpio0: invalid IRQ base in pdata pl061_gpio dev:gpio1: invalid IRQ base in pdata pl061_gpio dev:gpio2: invalid IRQ base in pdata clcd-pl11x issp:clcd: PL111 rev2 at 0x10020000 clcd-pl11x issp:clcd: RealView hardware, XVGA display Console: switching to colour frame buffer device 128x48 loop: module loaded physmap platform flash device: 04000000 at 40000000 physmap-flash physmap-flash.0: map_probe failed libphy: smsc911x-mdio: probed smsc911x smsc911x.0 eth0: attached PHY driver [SMSC LAN911x Internal PHY] (mii_bus:phy_addr=smsc911x-0:01, irq=-1) smsc911x smsc911x.0 eth0: MAC Address: 52:54:00:12:34:56 mousedev: PS/2 mouse device common for all mice rtc-ds1307 0-0068: rtc core: registered ds1338 as rtc0 rtc-ds1307 0-0068: 56 bytes nvram rtc-pl031 dev:rtc: rtc core: registered pl031 as rtc1 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral ledtrig-cpu: registered to indicate activity on CPUs input: AT Raw Set 2 keyboard as /devices/fpga:kmi0/serio0/input/input0 aaci-pl041 fpga:aaci: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 51 aaci-pl041 fpga:aaci: FIFO 512 entries TCP: cubic registered NET: Registered protocol family 17 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral rtc-ds1307 0-0068: setting system clock to 2015-01-10 10:37:41 UTC (1420886261) ALSA device list: #0: ARM AC'97 Interface PL041 rev0 at 0x10004000, irq 51 input: ImExPS/2 Generic Explorer Mouse as /devices/fpga:kmi1/serio1/input/input2 mmci-pl18x fpga:mmc0: No vmmc regulator found mmci-pl18x fpga:mmc0: No vqmmc regulator found mmci-pl18x fpga:mmc0: GPIO lookup for consumer cd mmci-pl18x fpga:mmc0: using lookup tables for GPIO lookup mmci-pl18x fpga:mmc0: lookup for GPIO cd failed gpio-16 (?): gpiod_request: status -517 amba fpga:mmc0: Driver mmci-pl18x requests probe deferral VFS: Cannot open root device "mmcblk0" or unknown-block(0,0): error -6 Please append a correct "root=" boot option; here are the available partitions: Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) CPU: 0 PID: 1 Comm: swapper Not tainted 3.18.1 #1 [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (panic+0x90/0x1e4) [] (panic) from [] (mount_block_root+0x1d0/0x260) [] (mount_block_root) from [] (mount_root+0x108/0x110) [] (mount_root) from [] (prepare_namespace+0x158/0x19c) [] (prepare_namespace) from [] (kernel_init_freeable+0x1b4/0x1c4) [] (kernel_init_freeable) from [] (kernel_init+0xc/0xe8) [] (kernel_init) from [] (ret_from_fork+0x14/0x3c) ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) chorler@linux-foxtrot:~/projects/build/buildroot>