2008-05-08 09:12:24 BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55634
Hi,
I use BF537 rev0.3 but when I changed the uclinux config setting from rev0.2 to rev0.3 the memory is still limited to 54MB. The hardware anomaly 05000263 should according Analog not exist in rev0.3 and that line during boot does actually not exist when I changed to rev0.3, so that seems to be ok. But there seems to be some other limitation. (I'm using the 2007R1.1 release)
I have 64MB of sdram on my board so there seems to be 10MB missing.
root:~> free
total used free shared buffers
Mem: 54188 10180 44008 0 136
any thoughts?
regards,
/Mattias
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2008-05-08 09:24:29 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Diego Serafin (ITALY)
Message: 55635
On my 0.3 (2008R1 but was OK with latest 2007Rxx):
root:~> free
total used free shared buffers
Mem: 127360 46960 80400 0 0
128M are there. Did you remember setting the proper BF version in menuconfig?
Regards,
Diego.
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2008-05-08 09:53:33 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mike Frysinger (UNITED STATES)
Message: 55638
as you said, you're using 2007R1. upgrade.
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2008-05-08 10:36:56 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Robin Getz (UNITED STATES)
Message: 55641
Mattias:
Mike is correct - when we made 2007R1 - there was no 0.3 silicon, so the option to turn off that bug does not exist.
If you look at your kernel boot - it might says something like "Warning - compiled for 0.2, but running on 0.3" (although, we might have added that after 2007R1 was released, I can't remember
-Robin
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2008-05-08 10:49:33 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55643
Hi,
Now I have tested with 2008R1-RC8 and get the same result.
Robin:
During boot I get the following (for both 2007R1.1 and 2008R1) :
Compiled for ADSP-BF537 Rev 0.3
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 600 MHz core clock and 120 MHz System Clock
Board Memory: 64MB
Kernel Managed Memory: 64MB
root:~> free
total used free shared buffers
Mem: 54112 7404 46708 0 128
/Mattias
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2008-05-08 10:58:00 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mike Frysinger (UNITED STATES)
Message: 55645
post the full boot log rather than just a snippet
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2008-05-08 11:22:08 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55646
Bytes transferred = 10543804 (a0e2bc hex)
Loading .text @ 0x0000a000 (1097808 bytes)
Loading .rodata @ 0x00117000 (257060 bytes)
Loading __ksymtab @ 0x00155c24 (14720 bytes)
Loading __ksymtab_gpl @ 0x001595a4 (3840 bytes)
Loading __ksymtab_strings @ 0x0015a4a4 (44388 bytes)
Loading __param @ 0x00165208 (460 bytes)
Loading .data @ 0x00166000 (73728 bytes)
Loading .init.text @ 0x00178000 (94940 bytes)
Loading .init.data @ 0x0018f2dc (3388 bytes)
Loading .init.setup @ 0x00190018 (596 bytes)
Loading .initcall.init @ 0x0019026c (456 bytes)
Loading .con_initcall.init @ 0x00190434 (4 bytes)
Loading .security_initcall.init @ 0x00190438 (4 bytes)
Loading .init.ramfs @ 0x0019043c (134 bytes)
Loading .text_l1 @ 0xffa00000 (7888 bytes)
sh_addr: FFA00000, p_paddr: 001904C2
Loading from: 01188000 to 001904C2, size: 7888
Loading .data_l1 @ 0xff800000 (192 bytes)
sh_addr: FF800000, p_paddr: 00192392
Loading from: 0118A000 to 00192392, size: 192
Clearing .bss @ 0x00193000 (1128400 bytes)
Loading .romfs @ 0x002a67d0 (8388608 bytes)
## Starting application at 0x00178000 ...
Linux version 2.6.22.18-ADI-2008R1-svn (mokn@xw440048m7) (gcc version 4.1.2 (ADI svn)) #122 Thu May 8 17:18:11 CEST 2008
Hardware Trace Active and Enabled
Reset caused by Software reset
Blackfin support (C) 2004-2007 Analog Devices, Inc.
Compiled for ADSP-BF537 Rev 0.3
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 600 MHz core clock and 120 MHz System Clock
Board Memory: 64MB
Kernel Managed Memory: 62MB
Memory map:
text = 0x0000a000-0x00116050
rodata = 0x00117000-0x001653d4
data = 0x00166000-0x00178000
stack = 0x00166000-0x00168000
init = 0x00178000-0x00193000
bss = 0x00193000-0x002a67d0
available = 0x002a67d0-0x03600000
rootfs = 0x03600000-0x03e00000
Instruction Cache Enabled
Data Cache Enabled (write-back)
Built 1 zonelists. Total pages: 13716
Kernel command line: root=/dev/mtdblock0 rw console=ttyBF0,57600 rw mem=62M max_mem=64M$# developer ip=10.46.11.49:10.46.11.141:192.168.0.1:255f
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: 52004k/63488k RAM, (108k init code, 1072k kernel code, 1493k data, 0k dma, 620k reserved)
Blackfin Scratchpad data SRAM: 4 KB
Blackfin Data A SRAM: 16 KB (15 KB free)
Blackfin Data B SRAM: 16 KB (16 KB free)
Blackfin Instruction SRAM: 48 KB (40 KB free)
Security Framework v1.0.0 initialized
Capability LSM initialized
Mount-cache hash table entries: 512
NET: Registered protocol family 16
Blackfin GPIO Controller
Blackfin DMA Controller
stamp_init(): registering device resources
Generic PHY: Registered new driver
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
pfx: pfbits driver for bf5xx
timer_initialize: module loaded
bfin-wdt: initialized: timeout=20 sec (nowayout=0)
Serial: Blackfin serial driver
bfin-uart.1: ttyBF0 at MMIO 0xffc02000 (irq = 20) is a BFIN-UART
RAMDISK driver initialized: 16 RAM disks of 4096K size 1024 blocksize
SMSC LAN83C185: Registered new driver
bfin_mac_mdio: probed
bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=23)@sclk=120MHz)
bfin_mac: Version 1.1, Blackfin BF53[67] BF527 on-chip Ethernet MAC driver
uclinux[mtd]: RAM probe address=0x3600000 size=0x800000
Creating 1 MTD partitions on "RAM":
0x00000000-0x00800000 : "ROMfs"
bfin-spi bfin-spi.0: Blackfin BF5xx on-chip SPI Contoller Driver, Version 1.0, regs_base@ffc00500, dma channel@7
net2272: PLX NET2272 USB Peripheral Controller
net2272: irq 54, mapped mem 20300000, chip rev 0011
net2272: running in 16-bit, no byte swap local bus mode
net2272: version: 2005 Sept 8
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 07:53:59 (28439)
IP-Config: Gateway not on directly connected network.
VFS: Mounted root (ext2 filesystem).
Freeing unused kernel memory: 108k freed
PHY: 0:01 - Link is Up - 100/Full
/etc/issue
blackfin login: root
Password:
_____________________________________
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| - http://blackfin.uclinux.org/
\ YP" `| 8P `. - http://docs.blackfin.uclinux.org/
/ \.___.d| .' - http://www.uclinux.org/
`--..__)8888P`._.' jgs/a:f - http://www.analog.com/blackfin
Have a lot of fun...
BusyBox v1.4.1 (2008-05-08 16:23:46 CEST) Built-in shell (msh)
Enter 'help' for a list of built-in commands.
root:~>
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2008-05-08 11:34:34 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mike Frysinger (UNITED STATES)
Message: 55647
looks like it worked just fine to me
i think you're forgetting to calculate in the rootfilesystem ... double check the memory map displayed
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2008-05-08 14:28:21 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55651
Ok,
So from the boot log
available = 0x002a67d0-0x03600000
rootfs = 0x03600000-0x03e00000
Then available memory would be: 0x3600000 - 0x002a67d0 = 0x3359830 = 53844016B
and rootfs : 0x3e00000-0x3600000 = 0x800000 = 8388608B
Doesn't this mean that I have used 8388608B and there are 53844016B available?
But the free command says that I only have 54 MB in total of which I have used the rootfs or...?
/Mattias
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2008-05-08 15:38:43 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Robin Getz (UNITED STATES)
Message: 55652
Mattias:
You wrote:
>Kernel Managed Memory: 62MB
>Memory map:0x0000a000-0x00116050
> rodata = 0x00117000-0x001653d4
> data = 0x00166000-0x00178000
> stack = 0x00166000-0x00168000
> init = 0x00178000-0x00193000
> bss = 0x00193000-0x002a67d0
> available = 0x002a67d0-0x03600000
> rootfs = 0x03600000-0x03e00000
If you have a look - available memory (0x002a67d0-0x03600000) - 53844016 bytes + init (0x00178000-0x00193000) 110592 bytes == 53954608 bytes == 52690.0 kbytes == 51.4 Mbytes
This is what the kernel tells you.
-Robin
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2008-05-09 03:18:01 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55657
Hi again,
This might seem obvious to you but I have some things I don't understand.
From the free command:
root:~> free
total used free shared buffers
Mem: 52112 5616 46496 0 96
The total memory of 52112KB is approx of the calculated available memory from the memory map.
What is used memory? I thought that was the memory occupied by the rootfs.
Why does Diegos system (second post), show a total memory close to his total physical memory.(Not 10MB less)?
When I build the system for a rev0.2 I get the following boot log. ( I attached a snippet from the memory layout and marked in red where it says that 8192B is reserved)
Warning: limiting memory to 54MB due to hardware anomaly 05000263
Recovering from Watchdog event
Blackfin support (C) 2004-2007 Analog Devices, Inc.
Compiled for ADSP-BF537 Rev 0.2
Warning: Compiled for Rev 2, but running on Rev 3
Blackfin Linux support by http://blackfin.uclinux.org/
Processor Speed: 600 MHz core clock and 120 MHz System Clock
Board Memory: 64MB
Kernel Managed Memory: 62MB
Memory map:
text = 0x0000a000-0x00116060
rodata = 0x00117000-0x00165440
data = 0x00166000-0x00178000
stack = 0x00166000-0x00168000
init = 0x00178000-0x00193000
bss = 0x00193000-0x002a67d0
available = 0x002a67d0-0x03600000
rootfs = 0x03600000-0x03e00000
Instruction Cache Enabled
Data Cache Enabled (write-back)
Built 1 zonelists. Total pages: 13716
Kernel command line: root=/dev/mtdblock0 rw console=ttyBF0,57600 rw mem=62M max_mem=64M$# developer ip=10.46.11.49:10.46.11.141:192.168.0.1:255f
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: 52004k/63488k RAM, (108k init code, 1072k kernel code, 1493k data, 0k dma, 8812k reserved)
This reservation is not there when I build for a rev0.3 version.
Bu the free command still shows the same amount of total memory.
/Mattias
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2008-05-09 03:51:37 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mike Frysinger (UNITED STATES)
Message: 55659
Diego isnt using the ram-backed mtd rootfilesystem. you are.
the memory map already shows where memory is being allocated on your system. the kernel does not know anything about the 8meg region used by the romfs, thus it doesnt show up in the free.
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2008-05-09 04:49:41 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55668
Ok,
That makes sense now thanks. But where in the settings is the setting where I do the 8M allocation of rom? Is the problem the ext2 filesystem?
/Mattias
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2008-05-09 05:17:12 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mike Frysinger (UNITED STATES)
Message: 55669
it's up to you how you want to do the root filesystem. if you have the uClinux MTD driver enabled, then a filesystem is created according to the Makefile in the vendors/board directory. the default size is 8meg.
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2008-05-09 05:56:06 Re: BF537 rev0.2 -> rev0.3 still gives max usable memory of 54MB
Mattias K (SWEDEN)
Message: 55671
ok, thanks. Didn't know about this.
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