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Valued Contributor III
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uClinux nios2 mmu

Hi. 

 

I'm developing a system nios2 with mmu support and I can't make uClinux work. 

 

This is the system nios ii build in Sopc Builder. 

 

https://www.alteraforum.com/forum/attachment.php?attachmentid=8483  

 

I can download the zImage.initramfs.gz 

 

$ nios2-download -g zimage.initramfs.gz 

Using cable "USB-Blaster [USB-0]", device 1, instance 0x00 

Pausing target processor: OK 

Initializing CPU cache (if present) 

OK 

Downloaded 1634KB in 23.8s (68.6KB/s) 

Verified OK 

Starting processor at address 0xC0400000 

 

Then, I run nios2-terminal and... 

 

$ nios2-terminal.exenios2-terminal: connected to hardware target using JTAG UART on cable 

nios2-terminal: "USB-Blaster [USB-0]", device 1, instance 0 

nios2-terminal: (Use the IDE stop button or Ctrl-C to terminate) 

 

 

Initializing cgroup subsys cpu 

Linux version 3.7.0+ (usuario@cent24.16 BogoMIPS (lpj=120832) 

pid_max: default: 32768 minimum: 301 

Mount-cache hash table entries: 512 

NET: Registered protocol family 16 

bio: create slab <bio-0> at 0 

SCSI subsystem initialized 

usbcore: registered new interface driver usbfs 

usbcore: registered new interface driver hub 

usbcore: registered new device driver usb 

Switching to clocksource timer 

NET: Registered protocol family 2 

TCP established hash table entries: 512 (order: 0, 4096 bytes) 

TCP bind hash table entries: 512 (order: -1, 2048 bytes) 

TCP: Hash tables configured (established 512 bind 512) 

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. 

jffs2: version 2.2. (NAND) © 2001-2006 Red Hat, Inc. 

io scheduler noop registered 

io scheduler deadline registered (default) 

crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64 

crc32: self tests passed, processed 225944 bytes in 3308320 nsec 

crc32c: CRC_LE_BITS = 64 

crc32c: self tests passed, processed 225944 bytes in -4244500 nsec 

ttyAL0 at MMIO 0x803440 (irq = 1) is a Altera UART 

console [ttyAL0] enabled, bootconsole disabled 

 

in putty... 

 

console [ttyAL0] enabled, bootconsole disabledttyJ0 at MMIO 0x803468 (irq = 2) is a Altera JTAG UART 

spi_altera 803400.spi: master is unqueued, this is deprecated 

spi_altera 803400.spi: base e0803400, irq 3 

Initializing USB Mass Storage driver... 

usbcore: registered new interface driver usb-storage 

USB Mass Storage support registered. 

mousedev: PS/2 mouse device common for all mice 

mmc_spi spi32766.0: SD/MMC host mmc0, no DMA, no WP, no poweroff, cd polling 

usbcore: registered new interface driver usbhid 

usbhid: USB HID core driver 

TCP: cubic registered 

Warning: unable to open an initial console. 

vfs: cannot open root device "(null)" or unknown-block(0,0): error -2 

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) 

 

and then nothing happens... 

 

If anyone can help, I will be very grateful. 

 

Attached the kernel configuration files and applications. 

 

Thanks 

Nicolás 

Córdoba Argentina
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