2009-02-18 08:28:45 RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 69556
Hi,
In 2008R1.5 uClinux kernel, the uClinux MTD map is always available, but it is no longer the default. How do we determine the address in SDRAM to which rootfs is mapped to?
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2009-02-18 08:49:41 Re: RootFS in 2008R1.5
Michael Hennerich (GERMANY)
Message: 69559
We changed the default rootfs to initramfs/initrd.
CONFIG_MTD_UCLINUX is currently not used.
Initramfs is not a MTD and grows dynamically.
So why do you care where the filesystem is mapped to?
-Michael
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2009-02-18 09:48:55 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 69565
Hi Michael,
Since no RAM space is now locked for rootfs as it was being done in 2007R1, will this 16MB space now be part of heap memory so that we can use it for dynamic allocation in our application that runs in uClinux?
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2009-02-18 12:16:46 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 69578
all memory is technically part of the kernel heap.
just because the initramfs method isnt the default doesnt mean you cant use the old way.
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2009-02-18 22:36:23 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 69593
When we ran our application in 2007R1 kernel, we are getting the following status for the 'free' command:
# free
total used free shared buffers
Mem: 45740 40432 5308 0 192
But, when we ran the same application in 2008R1.5 kernel, the mem status is as follows:
# free
total used free shared buffers
Mem: 60216 36808 23408 0 0
Could you please clarify the following:
1. Why the total mem has increased to 60M from 45M?
2. What is the reason for an increase in the free memory from 5M to 23M?
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2009-02-18 23:11:35 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 69595
you've already discovered why: initramfs is dynamic while uclinux mtd is a hard limit, and the latter goes through the page cache
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2009-02-18 23:39:22 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 69597
What is the main reason to change the initramfs from an mtd device in 2007R1 to dynamically growing type in 2008R1.5?
Is it advisable to use rootfs as an mtd device or retain the current dynamic feature? Also, do the names 'rootfs' and 'initramfs' mean the same?
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2009-02-18 23:55:48 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 69599
it's generally easier to work with things that are dynamic than static, and that is true here
rootfs does not mean the same thing as initrarmfs ... an initramfs can be a rootfs
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2009-02-23 02:02:38 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 69733
To enable MTD, is it enough if I just enable the macro CONFIG_MTD_UCLINUX in .config file?If not, please let me know the correct procedure to enable MTD.
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2009-02-23 11:30:32 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 69760
the MTD layer is documented in the wiki:
docs.blackfin.uclinux.org/doku.php?id=linux-kernel:mtd
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2009-02-26 11:14:39 Re: RootFS in 2008R1.5
Sudhakar GN (INDIA)
Message: 70014
Hi Mike,
I am also looking to enable MTD for BF533.
Could you provide the procedure to enable "CONFIG_MTD_UCLINUX" from make menuconfig options?
-Sudhakar
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2009-02-26 11:19:26 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 70016
step 1: enable uClinux MTD
step 2: done
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2009-02-26 11:43:51 Re: RootFS in 2008R1.5
Sudhakar GN (INDIA)
Message: 70018
Could not locate "step 1: enable uClinux MTD" under in make menuconfig options.
Menu settings flow information will help..
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2009-03-02 17:12:10 Re: RootFS in 2008R1.5
Rob Maris (GERMANY)
Message: 70233
kernel configuration under "Device Drivers", one of the entries on top.
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2009-03-03 01:12:41 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 70244
Hi,
We were able to enable MTD and now we are getting uImage.ext2 as binary image instead of uImage.initramfs. We also enabled the jffs2 filesystem after which we got the rootfs.jfff2 file. Our intereset is to use the flash as romfs (jffs2 filesystem over flash) and access it as a MTD device. Even after enabling the make menuconfig options as mentioned in the link docs.blackfin.uclinux.org/doku.php?id=linux-kernel:mtd we are not getting the MTD partitions for flash. We get the below message
Creating 1 MTD partitions on "RAM":
0x00000000-0x01000000 : "ROMfs"
We are using the BF533-EZKIT version. Please suggest us the way to use flash as romfs (as a MTD device).
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2009-03-03 01:36:55 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 70245
By BF533-EZKIT we actually mean that the version was taken as a base and customised for our project. The flash we use is CFI complaint. Please let me know if you need any special info.
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2009-03-03 01:46:08 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 70247
partitions dont get detected if you havent enabled the right drivers for the partitions to set on top of
post the entire kernel boot output rather than a snippet
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2009-03-03 02:27:19 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 70254
Hi Mike,
Please find the kernel start up print
## Booting image at 01000000 ...
Image Name: uClinux Kernel and ext2
Created: 2009-03-03 7:10:45 UTC
Image Type: Blackfin Linux Kernel Image (gzip compressed)
Data Size: 2291009 Bytes = 2.2 MB
Load Address: 00180000
Entry Point: 00318000
Verifying Checksum ... crc32 = 0x99be5dbe
OK
Uncompressing Kernel Image ... OK
Starting Kernel at = 318000
Linux version 2.6.22.19-ADI-2008R1.5-svn (karthi@host_120) (gcc version 4.1.2 (ADI svn)) #161 Tue Mar 3 12:40:17 IST 2009
Hardware Trace Active and Enabled
Blackfin support (C) 2004-2007 Analog Devices, Inc.
Compiled for ADSP-BF533 Rev 0.5
Blackfin Linux support by blackfin.uclinux.org/
Processor Speed: 594 MHz core clock and 118 MHz System Clock
Board Memory: 64MB
Kernel Managed Memory: 64MB
Memory map:
text = 0x00180000-0x0029d720
rodata = 0x0029e000-0x00307ad8
data = 0x00308000-0x00318000
stack = 0x00308000-0x0030a000
init = 0x00318000-0x00334000
bss = 0x00334000-0x003e3b1c
available = 0x003e3b1c-0x02f00000
rootfs = 0x02f00000-0x03f00000
DMA Zone = 0x03f00000-0x04000000
NOMPU: setting up cplb tables for global access
Instruction Cache Enabled
Data Cache Enabled (write-back)
Built 1 zonelists. Total pages: 11938
Kernel command line: root=/dev/mtdblock0 ip=192.168.0.15:192.168.0.2:192.168.0.1:255.255.255.0:np2x00:eth0:off console=ttyBF0,57600
Configuring Blackfin Priority Driven Interrupts
PID hash table entries: 256 (order: 8, 1024 bytes)
Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)
Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)
Memory available: 43568k/65536k RAM, (112k init code, 1141k kernel code, 1193k data, 1024k dma, 2116k reserved)
Blackfin Scratchpad data SRAM: 4 KB
Blackfin Data A SRAM: 16 KB (3 KB free)
Blackfin Data B SRAM: 16 KB (16 KB free)
Blackfin Instruction SRAM: 64 KB (52 KB free)
Security Framework v1.0.0 initialized
Mount-cache hash table entries: 512
NET: Registered protocol family 16
Blackfin GPIO Controller
Blackfin DMA Controller
ezkit_init(): registering device resources
NET: Registered protocol family 2
IP route cache hash table entries: 1024 (order: 0, 4096 bytes)
TCP established hash table entries: 2048 (order: 2, 16384 bytes)
TCP bind hash table entries: 2048 (order: 1, 8192 bytes)
TCP: Hash tables configured (established 2048 bind 2048)
TCP reno registered
JFFS2 version 2.2. (NAND) 2001-2006 Red Hat, Inc.
io scheduler noop registered
io scheduler anticipatory registered (default)
io scheduler cfq registered
Inside FPGA Driver init
condifure FPGA
initiate FPGA access
inside Initiate FPGA
going out Initiate FPGA
configuring GPIO
After Config_GPIO_Pins
after EXP_SetLatchBits
After init_config_fpga
Inside config SPORT
SPORT config
Inside WAIT_For_FPGA_Ready
inside while(1)
out of while(1) FPGA is ready
Got ready signal from FPGA
Configuring FPGA .........
inside DONE true condition
Configured FPGA Successfully
Initiating the access for FPGA registers
Reading data from WLAN registers
Hexa decimal Value Read from register
18
43
Passed at iteration: 0ADAV803 Module enabled
/* Flash Driver */
--------------------
ST Micro Electronics Flash device
Bottom Boot M28640HSBXXX Flash device
Intel Compatible Control Interface
Flash Size : 8MB
Gpio module enabled
Keypad Module enabled
TIMER1: KEYPAD Driver INIT IRQ:24
LCD Module enabled
IR Module enabled
Single Core Loader Module enabled
timer_initialize: module loaded
bfin-wdt: initialized: timeout=20 sec (nowayout=0)
Serial: Blackfin serial driver
bfin-uart.1: ttyBF0 at MMIO 0xffc00400 (irq = 21) is a BFIN-UART
RAMDISK driver initialized: 1 RAM disks of 4096K size 1024 blocksize
smc91x: not found (-19).
Network interface: "eth0"<6>/proc/HW_ADDR created
ret value from smsc911x_drv_probe Func is 0
uclinux[mtd]: RAM probe address=0x2f00000 size=0x1000000
Creating 1 MTD partitions on "RAM":
0x00000000-0x01000000 : "ROMfs"
bfin-spi bfin-spi.0: Blackfin BF5xx on-chip SPI Contoller Driver, Version 1.0, regs_base@ffc00500, dma channel@5
rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0
TCP cubic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
rtc-bfin rtc-bfin: setting the system clock to 1970-01-01 22:17:39 (80259)
eth0: link down
IP-Config: Complete:
device=eth0, addr=192.168.0.15, mask=255.255.255.0, gw=192.168.0.1,
host=np2x00, domain=, nis-domain=(none),
bootserver=192.168.0.2, rootserver=192.168.0.2, rootpath=
VFS: Mounted root (ext2 filesystem) readonly.
Freeing unused kernel memory: 112k freed
dma_alloc_init: dma_page @ 0x0032f000 - 256 pages at 0x03f00000
_____________________________________
a8888b. / Welcome to the uClinux distribution \
d888888b. / _ _ \
8P"YP"Y88 / | | |_| __ __ (TM) |
8|o||o|88 _____/ | | _ ____ _ _ \ \/ / |
8' .88 \ | | | | _ \| | | | \ / |
8`._.' Y8. \ | |__ | | | | | |_| | / \ |
d/ `8b. \ \____||_|_| |_|\____|/_/\_\ |
dP . Y8b. \ For embedded processors including |
d8:' " `::88b \ the Analog Devices Blackfin /
d8" 'Y88b \___________________________________/
:8P ' :888
8a. : _a88P For further information, check out:
._/"Yaa_: .| 88P| - blackfin.uclinux.org/
\ YP" `| 8P `. - docs.blackfin.uclinux.org/
/ \.___.d| .' - www.uclinux.org/
`--..__)8888P`._.' jgs/a:f - www.analog.com/blackfin
Have a lot of fun...
th0: link up, 100Mbps, full-duplex, lpa 0x4DE1
Unable to bind server socket to port 23: Address already in use
chmod: Philips_NP: No such file or directory
insmod: wl.ko: No such file or directory
Philips_NP: not found
init: Booting to single user mode
BusyBox v1.4.1 (2009-03-02 15:57:56 IST) Built-in shell (msh)
Enter 'help' for a list of built-in commands.
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2009-03-03 02:37:35 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 70255
did you actually enable an appropriate driver then ? or are you using your own driver ?
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2009-03-03 04:18:00 Re: RootFS in 2008R1.5
Hari Prasad (INDIA)
Message: 70273
Hi Mike,
We are using our own driver.
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2009-03-03 16:49:36 Re: RootFS in 2008R1.5
Mike Frysinger (UNITED STATES)
Message: 70305
then you'll have to review the stack to make sure your driver is doing the right thing. the existing stack is geared towards using the common CFI drivers, not custom ones.