Artifact 3b11d7bf1ea31a579211febf61977d46a8af97e4:
- File doc/kerneldbg/firststeps.wiki — part of check-in [5f52fd0628] at 2012-01-11 19:31:18 on branch trunk — Fixes on first steps. (user: viric size: 4601)
After connecting the serial lines, I could see that pressing 'u' at boot with the usual uboot, I saw in the serial line:
NAND Secondary Program Loader [U] pressed, goto USBBOOT mode </verbabtim> That means I can use xbboot or usbboot from the xburst tools. I have a jz-3.2 kernel built (vmlinuz.bin). I used this command line, stored in the kernel: <verbatim> CONFIG_CMDLINE="mem=32M console=ttyS0,9600n8 ubi.mtd=2 rootfstype=ubifs root=ubi0:rootfs rw rootwait"
I load it this way:
# xbboot -u 0x80600000 vmlinuz.bin Info - found XBurst boot device. set_addr 80002000h bulk_write successfully wrote 6088 bytes. start1 80002000h VR_GET_CPU_INFO JZ4740V1 set_addr 80600000h bulk_write successfully wrote 2054683 bytes. VR_FLUSH_CACHES start2 80600000h
And at boot it says:
Ben NanoNote GPIO, clocks, SDRAM, UART setup now jump back to BOOT ROM... ziess 80010000 Nkernel... the kernel... [ 0.000000] Linux version 3.2.0prova-86405-gc97b223 (viric@bergamota) (collect2: ld returned 1 exit status) #5 PREEMPT Wed Jan 11 20:03:56 CET 2012 [ 0.000000] bootconsole [early0] enabled [ 0.000000] CPU revision is: 0ad0024f (Ingenic JZRISC) [ 0.000000] Determined physical RAM map: [ 0.000000] memory: 02000000 @ 00000000 (usable) [ 0.000000] User-defined physical RAM map: [ 0.000000] memory: 02000000 @ 00000000 (usable) [ 0.000000] Zone PFN ranges: [ 0.000000] Normal 0x00000000 -> 0x00002000 [ 0.000000] Movable zone start PFN for each node [ 0.000000] early_node_map[1] active PFN ranges [ 0.000000] 0: 0x00000000 -> 0x00002000 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8128 [ 0.000000] Kernel command line: mem=32M console=ttyS0,9600n8 ubi.mtd=2 rootfstype=ubifs root=ubi0:rootfs rw rootwait [ 0.000000] PID hash table entries: 128 (order: -3, 512 bytes) [ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) [ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Primary instruction cache 16kB, VIPT, 4-way, linesize 32 bytes. [ 0.000000] Primary data cache 16kB, 4-way, VIPT, no aliases, linesize 32 bytes [ 0.000000] Memory: 27616k/32768k available (3140k kernel code, 5152k reserved, 1060k data, 176k init, 0k highmem) [ 0.000000] NR_IRQS:190 [ 0.000000] Console: colour dummy device 80x25 [ 0.000000] Calibrating delay loop... 250.67 BogoMIPS (lpj=1253376) [ 0.090000] pid_max: default: 32768 minimum: 301 [ 0.100000] Mount-cache hash table entries: 512 [ 0.110000] Performance counters: No available PMU. [ 0.130000] NET: Registered protocol family 16 [ 0.160000] JZ4740 GPIO initialized [ 0.180000] Qi Hardware JZ4740 QI LB60 setup [ 0.290000] bio: create slab <bio-0> at 0 [ 0.310000] Advanced Linux Sound Architecture Driver Version 1.0.24. [ 0.320000] Switching to clocksource jz4740-timer [ 0.480000] NET: Registered protocol family 2 [ 0.490000] IP route cache hash table entries: 1024 (order: 0, 4096 bytes) [ 0.500000] TCP established hash table entries: 1024 (order: 1, 8192 bytes) [ 0.510000] TCP bind hash table entries: 1024 (order: 0, 4096 bytes) [ 0.520000] TCP: Hash tables configured (established 1024 bind 1024) [ 0.530000] TCP reno registered [ 0.540000] UDP hash table entries: 256 (order: 0, 4096 bytes) [ 0.550000] UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) [ 0.560000] NET: Registered protocol family 1 [ 0.590000] JFFS2 version 2.2. (NAND) (SUMMARY) © 2001-2006 Red Hat, Inc. [ 0.600000] msgmni has been set to 53 [ 0.620000] io scheduler noop registered [ 0.620000] io scheduler deadline registered (default) [ 0.660000] Console: switching to colour frame buffer device 40x15 [ 0.710000] Serial: 8250/16550 driver, 2 ports, IRQ sharing disabled [ 0.730000] serial8250.0: ttyS0 at MMIO 0x10030000 (irq = 17) is a 16550 (AND NOW, LOTS of ^@, so, zeroes)
Failures
After serial8250.0..., I see lots of zeroes
After serial8250.0..., I see lots of zeroes
Loading the driver sets 57600n8 ttyS0 configuration. Then, you better use that console
setting, instead of overriding it with things like console=ttyS0,9600n8
.
UBI error: cannot initialize UBI, error -19
Thats in (drivers/mtd/ubi/build.c:536). -19 means, as -errno, for errno=ENODEV (No such device). It can be the next line to:
[ 0.800000] jz4740-nand jz4740-nand.0: No NAND chips found
(I still don't know how to solve that. Someone (mth?) may have broken that)