RE: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi Sorry,my question has somewhat confusion, I'd like to ask "why romfs can not be mounted through ramdisk?" Just as erwin said: "you need a block device for your root fs, either blkmem or from MTD. " RAMDISK is also a block device? Regards rui >-Original Message- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] >Sent: Wednesday, May 16, 2007 9:48 AM >To: uclinux-dev@uclinux.org >Subject: RE: [uClinux-dev] add ROMfs in RAM at the end of >kernel (_ebss) > >Hi > >What 's the purpose of blkmem? >Why I can not mount the romfs like this: > >Kernel command line: root=/dev/ram0 initrd=0x0c0a7ba0,117k >keepinitrd (0x0c0a7ba0 is the start address of my romfs inside >the kernel image) > > >Thanks! >rui > > > >>-Original Message- >>From: [EMAIL PROTECTED] >>[mailto:[EMAIL PROTECTED] On Behalf Of ext Erwin >>Authried >>Sent: Tuesday, May 15, 2007 4:13 PM >>To: uClinux development list >>Subject: RE: [uClinux-dev] add ROMfs in RAM at the end of kernel >>(_ebss) >> >>Am Dienstag, den 15.05.2007, 15:14 +0800 schrieb [EMAIL PROTECTED]: >>> Hi lance and other guys: >>> >>> May I have you a question about attaching the romfs to the kernel >>> image >>> >>> Can I do that without blkmem(kernel 2.4)? >>> >>> Or do that without MTD(kernel 2.6)? >>> >>> I just check my kernel 2.4 config,the romfs is inside the image.ram >>> with the blkmem enabled.after I removing the blkmem >>support,the Kernel got panic : >> >>you need a block device for your root fs, either blkmem or from MTD. >> >>-Erwin >> >> >>___ >>uClinux-dev mailing list >>uClinux-dev@uclinux.org >>http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >>This message was resent by uclinux-dev@uclinux.org To unsubscribe see: >>http://mailman.uclinux.org/mailman/options/uclinux-dev >> >___ >uClinux-dev mailing list >uClinux-dev@uclinux.org >http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >This message was resent by uclinux-dev@uclinux.org To unsubscribe see: >http://mailman.uclinux.org/mailman/options/uclinux-dev > ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
RE: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi What 's the purpose of blkmem? Why I can not mount the romfs like this: Kernel command line: root=/dev/ram0 initrd=0x0c0a7ba0,117k keepinitrd (0x0c0a7ba0 is the start address of my romfs inside the kernel image) Thanks! rui >-Original Message- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of ext >Erwin Authried >Sent: Tuesday, May 15, 2007 4:13 PM >To: uClinux development list >Subject: RE: [uClinux-dev] add ROMfs in RAM at the end of >kernel (_ebss) > >Am Dienstag, den 15.05.2007, 15:14 +0800 schrieb [EMAIL PROTECTED]: >> Hi lance and other guys: >> >> May I have you a question about attaching the romfs to the kernel >> image >> >> Can I do that without blkmem(kernel 2.4)? >> >> Or do that without MTD(kernel 2.6)? >> >> I just check my kernel 2.4 config,the romfs is inside the image.ram >> with the blkmem enabled.after I removing the blkmem >support,the Kernel got panic : > >you need a block device for your root fs, either blkmem or from MTD. > >-Erwin > > >___ >uClinux-dev mailing list >uClinux-dev@uclinux.org >http://mailman.uclinux.org/mailman/listinfo/uclinux-dev >This message was resent by uclinux-dev@uclinux.org To unsubscribe see: >http://mailman.uclinux.org/mailman/options/uclinux-dev > ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
RE: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Am Dienstag, den 15.05.2007, 15:14 +0800 schrieb [EMAIL PROTECTED]: > Hi lance and other guys: > > May I have you a question about attaching the romfs to the kernel image > > Can I do that without blkmem(kernel 2.4)? > > Or do that without MTD(kernel 2.6)? > > I just check my kernel 2.4 config,the romfs is inside the image.ram with the > blkmem enabled.after I removing the blkmem support,the > Kernel got panic : you need a block device for your root fs, either blkmem or from MTD. -Erwin ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
RE: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi lance and other guys: May I have you a question about attaching the romfs to the kernel image Can I do that without blkmem(kernel 2.4)? Or do that without MTD(kernel 2.6)? I just check my kernel 2.4 config,the romfs is inside the image.ram with the blkmem enabled.after I removing the blkmem support,the Kernel got panic : Kernel command line: root=/dev/ram0 initrd=0x0c074540,146k keepini(I modified the default command line so that the kernel can load the romfs at the correct address) trd Calibrating delay loop... 35.84 BogoMIPS Memory: 8MB = 8MB total Memory: 7328KB available (543K code, 149K data, 36K init) Dentry cache hash table entries: 1024 (order: 1, 8192 bytes) Inode cache hash table entries: 512 (order: 0, 4096 bytes) Mount cache hash table entries: 512 (order: 0, 4096 bytes) Buffer cache hash table entries: 1024 (order: 0, 4096 bytes) Page-cache hash table entries: 2048 (order: 1, 8192 bytes) POSIX conformance testing by UNIFIX Linux NET4.0 for Linux 2.4 Based upon Swansea University Computer Society NET3.039 Starting kswapd Samsung S3C44B0X UART driver version 0.1 <[EMAIL PROTECTED]> ttyS0 (irq = 3) is a builtin Samsung S3C44B0X UART RAMDISK driver initialized: 16 RAM disks of 1024K size 1024 blocksize *** VFS: test name = VFS: fs_name = VFS: root name <01:00> *** VFS: tried fs_name = err= -22 case -EBUSY & EINVAL Kernel panic: 2VFS: Unable to mount root fs on 01:00 Thankļ¼ rui >-Original Message- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of ext >Lance Spaulding >Sent: Tuesday, May 08, 2007 12:19 AM >To: uClinux development list >Subject: Re: [uClinux-dev] add ROMfs in RAM at the end of >kernel (_ebss) > >Hi Shaunglin, > >I've attached the kernel config and the console log during >boot for one of the platforms where I use a ram-based rom >filesystem (an ARM Realview EB board with an mpcore tile in >this case). This should show you how to coniigure MTD to get >things working. Note that using a ram disk is unrelated to >placing a romfs filesystem in ram. > >Hope this helps, >Lance > > > >Shuanglin Wang wrote: >> Hi Lance, >> >> Thanks for your help. I tried both ways remove "root=/dev/ram0" and >> add "rootfstype=romfs". But I got exactly same error result: >> >> // kernel log >> ---// >> >> RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize >> uclinux[mtd]: RAM probe address=0xf2450 size=0x1e000 Creating 1 MTD >> partitions on "RAM": >> 0x-0x0001e000 : "ROMfs" >> mtd: Giving out device 0 to ROMfs >> uclinux[mtd]: set ROMfs to be root filesystem >> VFS: Cannot open root device "" or unknown-block(31,0) Please >> append a correct "root=" boot option Kernel panic - not >syncing: VFS: >> Unable to mount root fs on >> unknown-block(31,0) >> >> >// >> // >> >> >> Would you please help me clarify several questions: >> >> 1. What should "root=?" be, if I remove "root=/dev/ram0" from kernel >> command line? >> >> 2. If romfs is located in main memory, should the kernel include the >> ramdisk module? >> >> 3. ROOT_DEV is (31,0), set in uclinux.c, do you think that should be >> correct one for mounting funciton? >> >> 4. There are several global variables defined in uclinux.c, like >> uclinux_ram_mtdinfo, uclinux_ram_map and uclinux_romfs. They are >> initialized in uclinux.c, but I can't find where and how they have >> been used directly or indirectly in later mounting procedure. >> >> BTW, can you send me a kernel configure file you have? I guess i >> didn't config the kernel coreectly. >> >> Thanks, >> Shuanglin >> >> >> >> Lance Spaulding wrote: >> >>> Hi Shaunglin, >>> >>> Try removing the 'root=/dev/ram0' from your command line. You can >>> add 'rootfstype=romfs' if you want but it should work w/o it. >>> >>> Thanks, >>> Lance >>> >>> Shuanglin Wang wrote: >>> >>> >>>> Hi Lance, >>>> >>>> I'm doing similar things. I patched the kernel with your >code, but i >>>> got an kernel panic. The boot log is: >>>> >>>> >/--- >>>> --/ >>>> Kernel command
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi Shaunglin, I've attached the kernel config and the console log during boot for one of the platforms where I use a ram-based rom filesystem (an ARM Realview EB board with an mpcore tile in this case). This should show you how to coniigure MTD to get things working. Note that using a ram disk is unrelated to placing a romfs filesystem in ram. Hope this helps, Lance Shuanglin Wang wrote: > Hi Lance, > > Thanks for your help. I tried both ways remove "root=/dev/ram0" and > add "rootfstype=romfs". But I got exactly same error result: > > // kernel log > ---// > > RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize > uclinux[mtd]: RAM probe address=0xf2450 size=0x1e000 > Creating 1 MTD partitions on "RAM": > 0x-0x0001e000 : "ROMfs" > mtd: Giving out device 0 to ROMfs > uclinux[mtd]: set ROMfs to be root filesystem > VFS: Cannot open root device "" or unknown-block(31,0) > Please append a correct "root=" boot option > Kernel panic - not syncing: VFS: Unable to mount root fs on > unknown-block(31,0) > > //// > > > Would you please help me clarify several questions: > > 1. What should "root=?" be, if I remove "root=/dev/ram0" from kernel > command line? > > 2. If romfs is located in main memory, should the kernel include the > ramdisk module? > > 3. ROOT_DEV is (31,0), set in uclinux.c, do you think that should be > correct one for mounting funciton? > > 4. There are several global variables defined in uclinux.c, like > uclinux_ram_mtdinfo, uclinux_ram_map and uclinux_romfs. They are > initialized in uclinux.c, but I can't find where and how they have > been used directly or indirectly in later mounting procedure. > > BTW, can you send me a kernel configure file you have? I guess i > didn't config the kernel coreectly. > > Thanks, > Shuanglin > > > > Lance Spaulding wrote: > >> Hi Shaunglin, >> >> Try removing the 'root=/dev/ram0' from your command line. You can add >> 'rootfstype=romfs' if you want but it should work w/o it. >> >> Thanks, >> Lance >> >> Shuanglin Wang wrote: >> >> >>> Hi Lance, >>> >>> I'm doing similar things. I patched the kernel with your code, but i >>> got an kernel panic. The boot log is: >>> >>> /-/ >>> Kernel command line: root=/dev/ram0 >>> ... >>> io scheduler noop registered (default) >>> atmel_usart.0: ttyS0 at MMIO 0xf800f000 (irq = 11) is a ATMEL_SERIAL >>> RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize >>> uclinux[mtd]: RAM probe address=0xf02f0 size=0x1e000 >>> Creating 1 MTD partitions on "RAM": >>> 0x-0x0001e000 : "ROMfs" >>> mtd: Giving out device 0 to ROMfs >>> uclinux[mtd]: set ROMfs to be root filesystem >>> Generic platform RAM MTD, (c) 2004 Simtec Electronics >>> VFS: Can't find a romfs filesystem on dev ram0. >>> No filesystem could mount root, tried: romfs >>> Kernel panic - not syncing: VFS: Unable to mount root fs on >>> unknown-block(1,0) >>> /-/ >>> >>> I made further test on it. And it seems it get an empty super inode >>> from romfs. >>> >>> Did I miss something in kernel configuration or kernel command line? >>> >>> Thansk a lot. >>> >>> Shuanglin >>> >>> >>> >>> >>> Lance Spaulding wrote: >>> >>> Mickael Sergent wrote: > Hello, > > I'm trying to port uclinux 2.6.x on dev. board based on > ARM946-E-S. (I > use uClinux-dist 20070130) > > I would like to have kernel and ROMfs entirely in RAM but it seems to > be impossible on ARM architecture. > > On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be > used to do this. > > Does an equivalent exist in 2.6 version ? > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss > symbol in the end of kernel) but it doesn't solve problem (because > RAM > where is stored ROMfs is used by uclinux), so a patch is needed to > reserve ROMfs memory > > Do you know another solution to put ROMfs at the end of kernel ? > > Thanks a lot ! > > Best regards, > > Mickael. > > > > > > ___ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev > > Hi Mickael, We use a ram based rom filesystem on our ARM products (including ones using an arm946). I've attached a small patch of the changes I made to get this to work. Note that we use littl
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi Lance, Thanks for your help. I tried both ways remove "root=/dev/ram0" and add "rootfstype=romfs". But I got exactly same error result: // kernel log ---// RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize uclinux[mtd]: RAM probe address=0xf2450 size=0x1e000 Creating 1 MTD partitions on "RAM": 0x-0x0001e000 : "ROMfs" mtd: Giving out device 0 to ROMfs uclinux[mtd]: set ROMfs to be root filesystem VFS: Cannot open root device "" or unknown-block(31,0) Please append a correct "root=" boot option Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(31,0) //// Would you please help me clarify several questions: 1. What should "root=?" be, if I remove "root=/dev/ram0" from kernel command line? 2. If romfs is located in main memory, should the kernel include the ramdisk module? 3. ROOT_DEV is (31,0), set in uclinux.c, do you think that should be correct one for mounting funciton? 4. There are several global variables defined in uclinux.c, like uclinux_ram_mtdinfo, uclinux_ram_map and uclinux_romfs. They are initialized in uclinux.c, but I can't find where and how they have been used directly or indirectly in later mounting procedure. BTW, can you send me a kernel configure file you have? I guess i didn't config the kernel coreectly. Thanks, Shuanglin Lance Spaulding wrote: Hi Shaunglin, Try removing the 'root=/dev/ram0' from your command line. You can add 'rootfstype=romfs' if you want but it should work w/o it. Thanks, Lance Shuanglin Wang wrote: Hi Lance, I'm doing similar things. I patched the kernel with your code, but i got an kernel panic. The boot log is: /-/ Kernel command line: root=/dev/ram0 ... io scheduler noop registered (default) atmel_usart.0: ttyS0 at MMIO 0xf800f000 (irq = 11) is a ATMEL_SERIAL RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize uclinux[mtd]: RAM probe address=0xf02f0 size=0x1e000 Creating 1 MTD partitions on "RAM": 0x-0x0001e000 : "ROMfs" mtd: Giving out device 0 to ROMfs uclinux[mtd]: set ROMfs to be root filesystem Generic platform RAM MTD, (c) 2004 Simtec Electronics VFS: Can't find a romfs filesystem on dev ram0. No filesystem could mount root, tried: romfs Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0) /-/ I made further test on it. And it seems it get an empty super inode from romfs. Did I miss something in kernel configuration or kernel command line? Thansk a lot. Shuanglin Lance Spaulding wrote: Mickael Sergent wrote: Hello, I'm trying to port uclinux 2.6.x on dev. board based on ARM946-E-S. (I use uClinux-dist 20070130) I would like to have kernel and ROMfs entirely in RAM but it seems to be impossible on ARM architecture. On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be used to do this. Does an equivalent exist in 2.6 version ? I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss symbol in the end of kernel) but it doesn't solve problem (because RAM where is stored ROMfs is used by uclinux), so a patch is needed to reserve ROMfs memory Do you know another solution to put ROMfs at the end of kernel ? Thanks a lot ! Best regards, Mickael. ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev Hi Mickael, We use a ram based rom filesystem on our ARM products (including ones using an arm946). I've attached a small patch of the changes I made to get this to work. Note that we use little-endian exclusively so if you are using big-endian you will need to change the code slightly. Thanks, Lance diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S --- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S 2006-06-28 01:22:16.0 -0600 +++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S 2007-04-18 17:57:48.0 -0600 @@ -10,7 +10,6 @@ * published by the Free Software Foundation. * */ - .type__switch_data, %object __switch_data: .long__mmap_switched @@ -41,7 +40,6 @@ ldrnefp, [r4], #4 strnefp, [r5], #4 bne1b - movfp, #0@ Clear BSS (and zero fp) 1:cmpr6, r7 strccfp, [r6],#4 @@ -215,3 +213,41 @@ bl__lookup_machine_type mov
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi Shaunglin,
Try removing the 'root=/dev/ram0' from your command line. You can add
'rootfstype=romfs' if you want but it should work w/o it.
Thanks,
Lance
Shuanglin Wang wrote:
> Hi Lance,
>
> I'm doing similar things. I patched the kernel with your code, but i
> got an kernel panic. The boot log is:
>
> /-/
> Kernel command line: root=/dev/ram0
> ...
> io scheduler noop registered (default)
> atmel_usart.0: ttyS0 at MMIO 0xf800f000 (irq = 11) is a ATMEL_SERIAL
> RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize
> uclinux[mtd]: RAM probe address=0xf02f0 size=0x1e000
> Creating 1 MTD partitions on "RAM":
> 0x-0x0001e000 : "ROMfs"
> mtd: Giving out device 0 to ROMfs
> uclinux[mtd]: set ROMfs to be root filesystem
> Generic platform RAM MTD, (c) 2004 Simtec Electronics
> VFS: Can't find a romfs filesystem on dev ram0.
> No filesystem could mount root, tried: romfs
> Kernel panic - not syncing: VFS: Unable to mount root fs on
> unknown-block(1,0)
> /-/
>
> I made further test on it. And it seems it get an empty super inode
> from romfs.
>
> Did I miss something in kernel configuration or kernel command line?
>
> Thansk a lot.
>
> Shuanglin
>
>
>
>
> Lance Spaulding wrote:
>
>> Mickael Sergent wrote:
>>
>>
>>> Hello,
>>>
>>> I'm trying to port uclinux 2.6.x on dev. board based on ARM946-E-S. (I
>>> use uClinux-dist 20070130)
>>>
>>> I would like to have kernel and ROMfs entirely in RAM but it seems to
>>> be impossible on ARM architecture.
>>>
>>> On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be
>>> used to do this.
>>>
>>> Does an equivalent exist in 2.6 version ?
>>>
>>>
>>> I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss
>>> symbol in the end of kernel) but it doesn't solve problem (because RAM
>>> where is stored ROMfs is used by uclinux), so a patch is needed to
>>> reserve ROMfs memory
>>>
>>> Do you know another solution to put ROMfs at the end of kernel ?
>>>
>>> Thanks a lot !
>>>
>>> Best regards,
>>>
>>> Mickael.
>>>
>>>
>>>
>>>
>>> ___
>>> uClinux-dev mailing list
>>> uClinux-dev@uclinux.org
>>> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
>>> This message was resent by uclinux-dev@uclinux.org
>>> To unsubscribe see:
>>> http://mailman.uclinux.org/mailman/options/uclinux-dev
>>>
>> Hi Mickael,
>>
>> We use a ram based rom filesystem on our ARM products (including ones
>> using an arm946). I've attached a small patch of the changes I made to
>> get this to work. Note that we use little-endian exclusively so if you
>> are using big-endian you will need to change the code slightly.
>> Thanks,
>> Lance
>>
>>
>>
>>
>> diff -Naur
>> uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S
>> uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S
>> --- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S
>> 2006-06-28 01:22:16.0 -0600
>> +++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S
>> 2007-04-18 17:57:48.0 -0600
>> @@ -10,7 +10,6 @@
>> * published by the Free Software Foundation.
>> *
>> */
>> -
>> .type__switch_data, %object
>> __switch_data:
>> .long__mmap_switched
>> @@ -41,7 +40,6 @@
>> ldrnefp, [r4], #4
>> strnefp, [r5], #4
>> bne1b
>> -
>> movfp, #0@ Clear BSS (and zero fp)
>> 1:cmpr6, r7
>> strccfp, [r6],#4
>> @@ -215,3 +213,41 @@
>> bl__lookup_machine_type
>> movr0, r5
>> ldmfdsp!, {r4 - r6, pc}
>> +
>> +#ifdef CONFIG_MTD_UCLINUX
>> +.type__relocate_romfs, %function
>> +__relocate_romfs:
>> + adr r4, romfsinfo
>> +ldmiar4!, {r6, r7}
>> + bic r6, r6, #0xc000
>> + bic r7, r7, #0xc000
>> + + /* move the ram based rom filesystem to its correct final
>> location... */
>> + /* the value is stored
>> big-endian */
>> + mov fp, #0
>> + add r4,r6,#8
>> + ldrb r4,[r4]
>> + orr fp, fp, r4, LSL #24
>> + add r4,r6,#9
>> + ldrb r4,[r4]
>> + orr fp, fp, r4, LSL #16
>> + add r4,r6,#10
>> + ldrb r4,[r4]
>> + orr fp, fp, r4, LSL #8
>> + add r4,r6,#11
>> + ldrb r4,[r4]
>> + orr fp, fp, r4, LSL #0
>> + add r4, r6, fp
>> + add fp, r7, fp
>> + sub r6, r6, #4
>> +1: ldr r5, [r4]
>> + str r5, [fp]
>> + sub r4, r4, #4
>> + sub fp, fp, #4
>> + cmp r4, r6
>> + bne 1b
>> + mov pc, lr
>> +romfsinfo:
>> +.long__bss_start@ r6
>> +.long_end@ r7
>> +#endif
>> diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-nommu.S
>> uClinux-dist/linux-2.6.x/arch/arm/kernel/head-nommu.S
>> --- uClinux-dist.o
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hi Lance,
I'm doing similar things. I patched the kernel with your code, but i got
an kernel panic. The boot log is:
/-/
Kernel command line: root=/dev/ram0
...
io scheduler noop registered (default)
atmel_usart.0: ttyS0 at MMIO 0xf800f000 (irq = 11) is a ATMEL_SERIAL
RAMDISK driver initialized: 1 RAM disks of 1024K size 1024 blocksize
uclinux[mtd]: RAM probe address=0xf02f0 size=0x1e000
Creating 1 MTD partitions on "RAM":
0x-0x0001e000 : "ROMfs"
mtd: Giving out device 0 to ROMfs
uclinux[mtd]: set ROMfs to be root filesystem
Generic platform RAM MTD, (c) 2004 Simtec Electronics
VFS: Can't find a romfs filesystem on dev ram0.
No filesystem could mount root, tried: romfs
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(1,0)
/-/
I made further test on it. And it seems it get an empty super inode from
romfs.
Did I miss something in kernel configuration or kernel command line?
Thansk a lot.
Shuanglin
Lance Spaulding wrote:
Mickael Sergent wrote:
Hello,
I'm trying to port uclinux 2.6.x on dev. board based on ARM946-E-S. (I
use uClinux-dist 20070130)
I would like to have kernel and ROMfs entirely in RAM but it seems to
be impossible on ARM architecture.
On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be
used to do this.
Does an equivalent exist in 2.6 version ?
I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss
symbol in the end of kernel) but it doesn't solve problem (because RAM
where is stored ROMfs is used by uclinux), so a patch is needed to
reserve ROMfs memory
Do you know another solution to put ROMfs at the end of kernel ?
Thanks a lot !
Best regards,
Mickael.
___
uClinux-dev mailing list
uClinux-dev@uclinux.org
http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
This message was resent by uclinux-dev@uclinux.org
To unsubscribe see:
http://mailman.uclinux.org/mailman/options/uclinux-dev
Hi Mickael,
We use a ram based rom filesystem on our ARM products (including ones
using an arm946). I've attached a small patch of the changes I made to
get this to work. Note that we use little-endian exclusively so if you
are using big-endian you will need to change the code slightly.
Thanks,
Lance
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S
uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S
--- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S 2006-06-28
01:22:16.0 -0600
+++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S 2007-04-18
17:57:48.0 -0600
@@ -10,7 +10,6 @@
* published by the Free Software Foundation.
*
*/
-
.type __switch_data, %object
__switch_data:
.long __mmap_switched
@@ -41,7 +40,6 @@
ldrne fp, [r4], #4
strne fp, [r5], #4
bne 1b
-
mov fp, #0 @ Clear BSS (and zero fp)
1: cmp r6, r7
strcc fp, [r6],#4
@@ -215,3 +213,41 @@
bl __lookup_machine_type
mov r0, r5
ldmfd sp!, {r4 - r6, pc}
+
+#ifdef CONFIG_MTD_UCLINUX
+ .type __relocate_romfs, %function
+__relocate_romfs:
+ adr r4, romfsinfo
+ ldmia r4!, {r6, r7}
+ bic r6, r6, #0xc000
+ bic r7, r7, #0xc000
+
+ /* move the ram based rom filesystem to its correct final location... */
+ /* the value is stored big-endian
*/
+ mov fp, #0
+ add r4,r6,#8
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #24
+ add r4,r6,#9
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #16
+ add r4,r6,#10
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #8
+ add r4,r6,#11
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #0
+ add r4, r6, fp
+ add fp, r7, fp
+ sub r6, r6, #4
+1: ldr r5, [r4]
+ str r5, [fp]
+ sub r4, r4, #4
+ sub fp, fp, #4
+ cmp r4, r6
+ bne 1b
+ mov pc, lr
+romfsinfo:
+ .long __bss_start @ r6
+ .long _end@ r7
+#endif
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-nommu.S
uClinux-dist/linux-2.6.x/arch/arm/kernel/head-nommu.S
--- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-nommu.S 2007-01-29
18:55:08.0 -0700
+++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-nommu.S 2007-04-19
08:25:58.0 -0600
@@ -16,7 +16,6 @@
#include
#include
-#include
#include
#include
#include
@@ -41,6 +40,9 @@
ldr r1, =machine_arch_type @ find the machine type
msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
@ and irqs disabled
+#ifdef CONFIG_MTD_UCLINUX
+
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hello, It works !! Thanks you very much !! Best regards, Mickael. PS : I just change a line .long__bss_start@ r6 by .long_edata @ r6 if fact, like in 2.4.x kernel with CONFIG_RAM_ATTACHED_ROMFS switch. 2007/4/19, Lance Spaulding <[EMAIL PROTECTED]>: Mickael Sergent wrote: > Hello, > > I'm trying to port uclinux 2.6.x on dev. board based on ARM946-E-S. (I > use uClinux-dist 20070130) > > I would like to have kernel and ROMfs entirely in RAM but it seems to > be impossible on ARM architecture. > > On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be > used to do this. > > Does an equivalent exist in 2.6 version ? > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss > symbol in the end of kernel) but it doesn't solve problem (because RAM > where is stored ROMfs is used by uclinux), so a patch is needed to > reserve ROMfs memory > > Do you know another solution to put ROMfs at the end of kernel ? > > Thanks a lot ! > > Best regards, > > Mickael. > > > > ___ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev Hi Mickael, We use a ram based rom filesystem on our ARM products (including ones using an arm946). I've attached a small patch of the changes I made to get this to work. Note that we use little-endian exclusively so if you are using big-endian you will need to change the code slightly. Thanks, Lance ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Mickael Sergent wrote:
> Hello,
>
> I'm trying to port uclinux 2.6.x on dev. board based on ARM946-E-S. (I
> use uClinux-dist 20070130)
>
> I would like to have kernel and ROMfs entirely in RAM but it seems to
> be impossible on ARM architecture.
>
> On uclinux 2.4 version a switch (CONFIG_RAM_ATTACHED_ROMFS) can be
> used to do this.
>
> Does an equivalent exist in 2.6 version ?
>
>
> I tried to use CONFIG_MTD_UCLINUX_EBSS (after having defined _ebss
> symbol in the end of kernel) but it doesn't solve problem (because RAM
> where is stored ROMfs is used by uclinux), so a patch is needed to
> reserve ROMfs memory
>
> Do you know another solution to put ROMfs at the end of kernel ?
>
> Thanks a lot !
>
> Best regards,
>
> Mickael.
>
>
>
> ___
> uClinux-dev mailing list
> uClinux-dev@uclinux.org
> http://mailman.uclinux.org/mailman/listinfo/uclinux-dev
> This message was resent by uclinux-dev@uclinux.org
> To unsubscribe see:
> http://mailman.uclinux.org/mailman/options/uclinux-dev
Hi Mickael,
We use a ram based rom filesystem on our ARM products (including ones
using an arm946). I've attached a small patch of the changes I made to
get this to work. Note that we use little-endian exclusively so if you
are using big-endian you will need to change the code slightly.
Thanks,
Lance
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S
--- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-common.S 2006-06-28 01:22:16.0 -0600
+++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-common.S 2007-04-18 17:57:48.0 -0600
@@ -10,7 +10,6 @@
* published by the Free Software Foundation.
*
*/
-
.type __switch_data, %object
__switch_data:
.long __mmap_switched
@@ -41,7 +40,6 @@
ldrne fp, [r4], #4
strne fp, [r5], #4
bne 1b
-
mov fp, #0@ Clear BSS (and zero fp)
1: cmp r6, r7
strcc fp, [r6],#4
@@ -215,3 +213,41 @@
bl __lookup_machine_type
mov r0, r5
ldmfd sp!, {r4 - r6, pc}
+
+#ifdef CONFIG_MTD_UCLINUX
+ .type __relocate_romfs, %function
+__relocate_romfs:
+ adr r4, romfsinfo
+ ldmia r4!, {r6, r7}
+ bic r6, r6, #0xc000
+ bic r7, r7, #0xc000
+
+ /* move the ram based rom filesystem to its correct final location... */
+ /* the value is stored big-endian */
+ mov fp, #0
+ add r4,r6,#8
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #24
+ add r4,r6,#9
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #16
+ add r4,r6,#10
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #8
+ add r4,r6,#11
+ ldrb r4,[r4]
+ orr fp, fp, r4, LSL #0
+ add r4, r6, fp
+ add fp, r7, fp
+ sub r6, r6, #4
+1: ldr r5, [r4]
+ str r5, [fp]
+ sub r4, r4, #4
+ sub fp, fp, #4
+ cmp r4, r6
+ bne 1b
+ mov pc, lr
+romfsinfo:
+ .long __bss_start @ r6
+ .long _end@ r7
+#endif
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-nommu.S uClinux-dist/linux-2.6.x/arch/arm/kernel/head-nommu.S
--- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head-nommu.S 2007-01-29 18:55:08.0 -0700
+++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head-nommu.S 2007-04-19 08:25:58.0 -0600
@@ -16,7 +16,6 @@
#include
#include
-#include
#include
#include
#include
@@ -41,6 +40,9 @@
ldr r1, =machine_arch_type @ find the machine type
msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
@ and irqs disabled
+#ifdef CONFIG_MTD_UCLINUX
+ bl __relocate_romfs
+#endif
#ifndef CONFIG_CPU_CP15
ldr r9, =CONFIG_PROCESSOR_ID
#else
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head.S uClinux-dist/linux-2.6.x/arch/arm/kernel/head.S
--- uClinux-dist.orig/linux-2.6.x/arch/arm/kernel/head.S 2006-11-29 19:03:00.0 -0700
+++ uClinux-dist/linux-2.6.x/arch/arm/kernel/head.S 2007-04-19 08:27:23.0 -0600
@@ -16,7 +16,6 @@
#include
#include
-#include
#include
#include
#include
@@ -73,6 +72,9 @@
msr cpsr_c, #PSR_F_BIT | PSR_I_BIT | SVC_MODE @ ensure svc mode
@ and irqs disabled
mrc p15, 0, r9, c0, c0 @ get processor id
+#ifdef CONFIG_MTD_UCLINUX
+ bl __relocate_romfs
+#endif
bl __lookup_processor_type @ r5=procinfo r9=cpuid
movs r10, r5@ invalid processor (r5=0)?
beq __error_p @ yes, error 'p'
diff -Naur uClinux-dist.orig/linux-2.6.x/arch/arm/mm/init.c uClinux-dist/linux-2.6.x/arch/arm/mm/init.c
--- uClinux-dist.orig/linux-2.6.x/arch/arm/mm/init.c 2006-11-29 19:03:01.0 -0700
+++ uClinux-dist/linux-2.6.x/arch/arm/mm/init.c 2007-04-19 08:28:11.0 -0600
@@ -99,6 +99,23 @@
unsigned int start_pfn, bank, bootmap_pfn;
start_pfn = PAGE_ALIGN(__pa(&_end)) >> PAGE_SHIFT;
+#ifdef CONFIG_MTD_UCLINUX
+ {
+ /* If using a romfs in ram, move the bitmap */
+ extern char _ebss;
+ unsigned char *p;
+ unsigned romfslen;
+ unsig
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Yes I know, it is my website !! I stored all my patch in this site. In fact, in website, there are patch only for 2.4 version not for 2.6version. Truly, in my patch I use CONFIG_RAM_ATTACHED_ROMFS switch. I had a look at dslinux.org code and I saw some interesing thing (especially in arm/mm/init.c). I think you have right, kernel is entirely in RAM. I will try to inspire of this project to put romfs after the kernel. Thanks, Mickael. 2007/4/15, Mike Dorin <[EMAIL PROTECTED]>: Mickael, Have you seen this? (I guess you probably have) http://openwifiphone.free.fr/download_en.php I was not able to apply the patch. -Mike --- Mickael Sergent <[EMAIL PROTECTED]> wrote: > Hello Mike, > > I just have a look on dslinux.org, it seems to use a > CF flash, but I 'm > going to see more in details to be sure, thanks for > this information. > > My dev. board is an atmel, (at76c902 chip), a VoIp > chip borrow by Atmel, it > is just to learn linux and uclinux for me, it is not > a professional work. > > Thanks > > Mickael. > > > 2007/4/15, Mike Dorin <[EMAIL PROTECTED]>: > > > > > > Mickael, > > > > I am trying to exactly the same thing. > > I don't know that I am as far as you though. > > > > For on thing, I am still trying to understand the > > configurations, etc. > > > > I 'think' the nintendo ds linux has a RAM only > > version and a RAM-Devel version, which might do > > this. Take a peek at dslinux.org. > > The nintendo ds is based on the 946E-S. > > > > Who makes your development board? (If you don't > > mind me asking...I understand if you can't say?) > > > > -Mike > > > > > > > > > > --- Mickael Sergent <[EMAIL PROTECTED]> > wrote: > > > > > Hello, > > > > > > I'm trying to port uclinux 2.6.x on dev. board > based > > > on ARM946-E-S. (I use > > > uClinux-dist 20070130) > > > > > > I would like to have kernel and ROMfs entirely > in > > > RAM but it seems to be > > > impossible on ARM architecture. > > > > > > On uclinux 2.4 version a switch > > > (CONFIG_RAM_ATTACHED_ROMFS) can be used to > > > do this. > > > > > > Does an equivalent exist in 2.6 version ? > > > > > > > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after > having > > > defined _ebss symbol in > > > the end of kernel) but it doesn't solve problem > > > (because RAM where is stored > > > ROMfs is used by uclinux), so a patch is needed > to > > > reserve ROMfs memory > > > > > > Do you know another solution to put ROMfs at the > end > > > of kernel ? > > > > > > Thanks a lot ! > > > > > > Best regards, > > > > > > Mickael. > > > > > ___ > > > uClinux-dev mailing list > > > uClinux-dev@uclinux.org > > > > > > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > > > This message was resent by > uclinux-dev@uclinux.org > > > To unsubscribe see: > > > > > > http://mailman.uclinux.org/mailman/options/uclinux-dev > > > > > > __ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > ___ > > uClinux-dev mailing list > > uClinux-dev@uclinux.org > > > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > > This message was resent by uclinux-dev@uclinux.org > > To unsubscribe see: > > > http://mailman.uclinux.org/mailman/options/uclinux-dev > > > > ___ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Mickael, Have you seen this? (I guess you probably have) http://openwifiphone.free.fr/download_en.php I was not able to apply the patch. -Mike --- Mickael Sergent <[EMAIL PROTECTED]> wrote: > Hello Mike, > > I just have a look on dslinux.org, it seems to use a > CF flash, but I 'm > going to see more in details to be sure, thanks for > this information. > > My dev. board is an atmel, (at76c902 chip), a VoIp > chip borrow by Atmel, it > is just to learn linux and uclinux for me, it is not > a professional work. > > Thanks > > Mickael. > > > 2007/4/15, Mike Dorin <[EMAIL PROTECTED]>: > > > > > > Mickael, > > > > I am trying to exactly the same thing. > > I don't know that I am as far as you though. > > > > For on thing, I am still trying to understand the > > configurations, etc. > > > > I 'think' the nintendo ds linux has a RAM only > > version and a RAM-Devel version, which might do > > this. Take a peek at dslinux.org. > > The nintendo ds is based on the 946E-S. > > > > Who makes your development board? (If you don't > > mind me asking...I understand if you can't say?) > > > > -Mike > > > > > > > > > > --- Mickael Sergent <[EMAIL PROTECTED]> > wrote: > > > > > Hello, > > > > > > I'm trying to port uclinux 2.6.x on dev. board > based > > > on ARM946-E-S. (I use > > > uClinux-dist 20070130) > > > > > > I would like to have kernel and ROMfs entirely > in > > > RAM but it seems to be > > > impossible on ARM architecture. > > > > > > On uclinux 2.4 version a switch > > > (CONFIG_RAM_ATTACHED_ROMFS) can be used to > > > do this. > > > > > > Does an equivalent exist in 2.6 version ? > > > > > > > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after > having > > > defined _ebss symbol in > > > the end of kernel) but it doesn't solve problem > > > (because RAM where is stored > > > ROMfs is used by uclinux), so a patch is needed > to > > > reserve ROMfs memory > > > > > > Do you know another solution to put ROMfs at the > end > > > of kernel ? > > > > > > Thanks a lot ! > > > > > > Best regards, > > > > > > Mickael. > > > > > ___ > > > uClinux-dev mailing list > > > uClinux-dev@uclinux.org > > > > > > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > > > This message was resent by > uclinux-dev@uclinux.org > > > To unsubscribe see: > > > > > > http://mailman.uclinux.org/mailman/options/uclinux-dev > > > > > > __ > > Do You Yahoo!? > > Tired of spam? Yahoo! Mail has the best spam > protection around > > http://mail.yahoo.com > > ___ > > uClinux-dev mailing list > > uClinux-dev@uclinux.org > > > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > > This message was resent by uclinux-dev@uclinux.org > > To unsubscribe see: > > > http://mailman.uclinux.org/mailman/options/uclinux-dev > > > > ___ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Hello Mike, I just have a look on dslinux.org, it seems to use a CF flash, but I 'm going to see more in details to be sure, thanks for this information. My dev. board is an atmel, (at76c902 chip), a VoIp chip borrow by Atmel, it is just to learn linux and uclinux for me, it is not a professional work. Thanks Mickael. 2007/4/15, Mike Dorin <[EMAIL PROTECTED]>: Mickael, I am trying to exactly the same thing. I don't know that I am as far as you though. For on thing, I am still trying to understand the configurations, etc. I 'think' the nintendo ds linux has a RAM only version and a RAM-Devel version, which might do this. Take a peek at dslinux.org. The nintendo ds is based on the 946E-S. Who makes your development board? (If you don't mind me asking...I understand if you can't say?) -Mike --- Mickael Sergent <[EMAIL PROTECTED]> wrote: > Hello, > > I'm trying to port uclinux 2.6.x on dev. board based > on ARM946-E-S. (I use > uClinux-dist 20070130) > > I would like to have kernel and ROMfs entirely in > RAM but it seems to be > impossible on ARM architecture. > > On uclinux 2.4 version a switch > (CONFIG_RAM_ATTACHED_ROMFS) can be used to > do this. > > Does an equivalent exist in 2.6 version ? > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after having > defined _ebss symbol in > the end of kernel) but it doesn't solve problem > (because RAM where is stored > ROMfs is used by uclinux), so a patch is needed to > reserve ROMfs memory > > Do you know another solution to put ROMfs at the end > of kernel ? > > Thanks a lot ! > > Best regards, > > Mickael. > > ___ > uClinux-dev mailing list > [EMAIL PROTECTED] > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by [EMAIL PROTECTED] > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ uClinux-dev mailing list [EMAIL PROTECTED] http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by [EMAIL PROTECTED] To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev ___ uClinux-dev mailing list [EMAIL PROTECTED] http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by [EMAIL PROTECTED] To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
Re: [uClinux-dev] add ROMfs in RAM at the end of kernel (_ebss)
Mickael, I am trying to exactly the same thing. I don't know that I am as far as you though. For on thing, I am still trying to understand the configurations, etc. I 'think' the nintendo ds linux has a RAM only version and a RAM-Devel version, which might do this. Take a peek at dslinux.org. The nintendo ds is based on the 946E-S. Who makes your development board? (If you don't mind me asking...I understand if you can't say?) -Mike --- Mickael Sergent <[EMAIL PROTECTED]> wrote: > Hello, > > I'm trying to port uclinux 2.6.x on dev. board based > on ARM946-E-S. (I use > uClinux-dist 20070130) > > I would like to have kernel and ROMfs entirely in > RAM but it seems to be > impossible on ARM architecture. > > On uclinux 2.4 version a switch > (CONFIG_RAM_ATTACHED_ROMFS) can be used to > do this. > > Does an equivalent exist in 2.6 version ? > > > I tried to use CONFIG_MTD_UCLINUX_EBSS (after having > defined _ebss symbol in > the end of kernel) but it doesn't solve problem > (because RAM where is stored > ROMfs is used by uclinux), so a patch is needed to > reserve ROMfs memory > > Do you know another solution to put ROMfs at the end > of kernel ? > > Thanks a lot ! > > Best regards, > > Mickael. > > ___ > uClinux-dev mailing list > [EMAIL PROTECTED] > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by [EMAIL PROTECTED] > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ uClinux-dev mailing list [EMAIL PROTECTED] http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by [EMAIL PROTECTED] To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
