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[microblaze-uclinux] microblaze: Fix compiled-in rootfs

To: microblaze-uclinux@xxxxxxxxxxxxxx
Subject: [microblaze-uclinux] microblaze: Fix compiled-in rootfs
From: Michal Simek <monstr@xxxxxxxxx>
Date: Tue, 19 May 2009 14:55:02 +0200
Cc: steve@xxxxxxxxxxxxxxx, john.williams@xxxxxxxxxxxxx
Reply-to: microblaze-uclinux@xxxxxxxxxxxxxx
Sender: owner-microblaze-uclinux@xxxxxxxxxxxxxxxxxxxx
Hi All,

I looked at Steve's patches again and I did some tests with it.
I am not sure (please correct me if I am wrong) but rootfs should
be placed to BSS and then is this section zeroed.

In Steve's patches (or in latest version) was for this case used 
__init_end symbol but we should use bss section start (__bss_start symbol).
For my case these two symbols don't match. This is caused by 
aligned bss section.

[monstr@monstr linux-monstr.eu-commit]$ cat System.map | grep "__init_end$"
90271004 A __init_end
[monstr@monstr linux-monstr.eu-commit]$ cat System.map | grep bss_start
90272000 B __bss_start

Here is part of my script for generation compiled-in rootfs 
inside vmlinux and then create U-BOOT file format. (romfs.img is from petalinux and is romfs)

echo $CROSS_COMPILE
BSS=`${CROSS_COMPILE}objdump --headers vmlinux | grep "\.bss"`;
ADDR=`set -- ${BSS} ; echo 0x${5}`;
echo ${ADDR}

[ ! -f romfs.img ] && exit -1
${CROSS_COMPILE}objcopy --add-section=.romfs=romfs.img \
		--adjust-section-vma=.romfs=${ADDR} --no-adjust-warnings \
		--set-section-flags=.romfs=alloc,load,data   \
		vmlinux linux.elf
${CROSS_COMPILE}objcopy -O binary linux.elf linux.bin
mkimage  -A microblaze -O linux -T kernel -C none -a $addr -e $addr -n "kernel s rootfs" -d linux.bin /tftpboot/image2.ub

Steve: Could you please tested it? If is OK, I'll add your sign-off-by line.


Below is my bootlog for fixes-for-linus branch + this patch.

And on this site you can find my log of initramfs case.
http://monstr.eu/wiki/doku.php?id=fdt:fdt:logs:2.6.30-rc5-nommu-initramfs

I'll add my logs to that site too.


Thanks,
Michal


SDRAM :
                Icache:OK
                Dcache:OK
        U-Boot Start:0x9ffc0000
FLASH: 32 MB
MAC:00:E0:0C:00:00:FD
eth0: Xilinx XPS LocalLink Tri-Mode Ether MAC #0 at 0x81C00000.
Unsupported mode
U-Boot-mONStR> run b
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'image2.ub'.
Load address: 0x90800000
Loading: 100BASE-T/FD
#################################################################
         #################################################################
         #################################################################
         #################################################################
         #####################################
done
Bytes transferred = 4352064 (426840 hex)
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'system.dtb'.
Load address: 0x90780000
Loading: 100BASE-T/FD
#
done
Bytes transferred = 9121 (23a1 hex)
## Booting kernel from Legacy Image at 90800000 ...
   Image Name:   kernel s rootfs
   Image Type:   MicroBlaze Linux Kernel Image (uncompressed)
   Data Size:    4352000 Bytes =  4.2 MB
   Load Address: 90000000
   Entry Point:  90000000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK
## Flattened Device Tree blob at 90780000
   Booting using the fdt blob at 0x90780000
## Transferring control to Linux (at address 90000000), 0x00000000 ramdisk 0x00000000, FDT 0x90780000...
early_printk_console is enabled at 0x84000000
Ramdisk addr 0x00000000, FDT 0x90780000
Found romfs @ 0x90272000 (0x001b5000)
#### klimit 902c2000 ####
Moved 0x001b5000 bytes from 0x90272000 to 0x902c1b28
New klimit: 0x90477000
Found FDT at 0x90780000
Linux version 2.6.30-rc6-00348-g7b7210d-dirty (monstr@xxxxxxxxx) (gcc version 4.1.2) #15 Tue May 19 14:30:36 CEST 2009
setup_cpuinfo: initialising
setup_cpuinfo: Using full CPU PVR support
setup_memory: Main mem: 0x90000000-0xa0000000, size 0x10000000
setup_memory: kernel addr=0x90000000-0x90477000 size=0x00477000
setup_memory: max_mapnr: 0x10000
setup_memory: min_low_pfn: 0x90000
setup_memory: max_low_pfn: 0xa0000
On node 0 totalpages: 65536
free_area_init_node: node 0, pgdat 90255d64, node_mem_map 90477000
  Normal zone: 512 pages used for memmap
  Normal zone: 0 pages reserved
  Normal zone: 65024 pages, LIFO batch:0
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024
Kernel command line: console=ttyUL0,115200 highres=on root=/dev/mtdblock0
NR_IRQS:32
xlnx,xps-intc-1.00.a #0 at 0x81800000, num_irq=9, edge=0x100
PID hash table entries: 1024 (order: 10, 4096 bytes)
xlnx,xps-timer-1.00.a #0 at 0x83c00000, irq=3
Heartbeat GPIO at 0x81400000
microblaze_timer_set_mode: shutdown
microblaze_timer_set_mode: periodic
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 255324k/262144k available
ODEBUG: 3 of 3 active objects replaced
ODEBUG: selftest passed
Calibrating delay loop... 61.03 BogoMIPS (lpj=305152)
Mount-cache hash table entries: 512
net_namespace: 544 bytes
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
microblaze_timer_set_mode: oneshot
Switched to high resolution mode on CPU 0
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
NET: Registered protocol family 1
ROMFS MTD (C) 2007 Red Hat, Inc.
msgmni has been set to 498
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
84000000.serial: ttyUL0 at MMIO 0x84000003 (irq = 8) is a uartlite
console [ttyUL0] enabled
brd: module loaded
nbd: registered device at major 43
uclinux[mtd]: RAM probe address=0x902c1b28 size=0x1b5000
Creating 1 MTD partitions on "RAM":
0x000000000000-0x0000001b5000 : "ROMfs"
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
VFS: Mounted root (romfs filesystem) readonly on device 31:0.
Freeing unused kernel memory: 92k freed
Mounting proc: 
Mounting var: 
Populating /var: 
Running local start scripts.
Mounting /etc/config: 
Populating /etc/config: 
flatfsd: Nonexistent or bad flatfs (-48), creating new one...
flatfsd: Failed to write flatfs (-48): No such device
flatfsd: Created 5 configuration files (185 bytes)
Mounting sysfs:
Setting hostname: 
Setting up interface lo: 
Setting up interface eth0: 
SIOCSIFADDR: No such device
Starting portmap:
Starting thttpd: 

uclinux login: 


or you can separate kernel and rootfs and it works on similar base


SDRAM :
                Icache:OK
                Dcache:OK
        U-Boot Start:0x9ffc0000
FLASH: 32 MB
MAC:00:E0:0C:00:00:FD
eth0: Xilinx XPS LocalLink Tri-Mode Ether MAC #0 at 0x81C00000.
Unsupported mode
U-Boot-mONStR> run ml505
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'image.ub'.
Load address: 0x90800000
Loading: 100BASE-T/FD
#################################################################
         #################################################################
         #############################################
done
Bytes transferred = 2560068 (271044 hex)
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'system.dtb'.
Load address: 0x90780000
Loading: 100BASE-T/FD
#
done
Bytes transferred = 9121 (23a1 hex)
TFTP from server 192.168.0.102; our IP address is 192.168.0.3
Filename 'romfs.ub'.
Load address: 0x90c80000
Loading: 100BASE-T/FD
#################################################################
         #########################################################
done
Bytes transferred = 1787968 (1b4840 hex)
## Booting kernel from Legacy Image at 90800000 ...
   Image Name:   kernel bez FS
   Image Type:   MicroBlaze Linux Kernel Image (uncompressed)
   Data Size:    2560004 Bytes =  2.4 MB
   Load Address: 90000000
   Entry Point:  90000000
   Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 90c80000 ...
   Image Name:   fs v no network
   Image Type:   MicroBlaze Linux RAMDisk Image (uncompressed)
   Data Size:    1787904 Bytes =  1.7 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
   Loading Kernel Image ... OK
OK
## Flattened Device Tree blob at 90780000
   Booting using the fdt blob at 0x90780000
## Loading init Ramdisk from Legacy Image at 90c80000 ...
   Image Name:   fs v no network
   Image Type:   MicroBlaze Linux RAMDisk Image (uncompressed)
   Data Size:    1787904 Bytes =  1.7 MB
   Load Address: 00000000
   Entry Point:  00000000
   Verifying Checksum ... OK
## Transferring control to Linux (at address 90000000), 0x00000000 ramdisk 0x90c80040, FDT 0x90780000...
early_printk_console is enabled at 0x84000000
Ramdisk addr 0x90c80040, FDT 0x90780000
Found romfs @ 0x90c80040 (0x001b5000)
#### klimit 902c2000 ####
Moved 0x001b5000 bytes from 0x90c80040 to 0x902c1b28
New klimit: 0x90477000
Found FDT at 0x90780000
Linux version 2.6.30-rc6-00348-g7b7210d-dirty (monstr@xxxxxxxxx) (gcc version 4.1.2) #15 Tue May 19 14:30:36 CEST 2009
setup_cpuinfo: initialising
setup_cpuinfo: Using full CPU PVR support
setup_memory: Main mem: 0x90000000-0xa0000000, size 0x10000000
setup_memory: kernel addr=0x90000000-0x90477000 size=0x00477000
setup_memory: max_mapnr: 0x10000
setup_memory: min_low_pfn: 0x90000
setup_memory: max_low_pfn: 0xa0000
On node 0 totalpages: 65536
free_area_init_node: node 0, pgdat 90255d64, node_mem_map 90477000
  Normal zone: 512 pages used for memmap
  Normal zone: 0 pages reserved
  Normal zone: 65024 pages, LIFO batch:0
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 65024
Kernel command line: console=ttyUL0,115200 highres=on root=/dev/mtdblock0
NR_IRQS:32
xlnx,xps-intc-1.00.a #0 at 0x81800000, num_irq=9, edge=0x100
PID hash table entries: 1024 (order: 10, 4096 bytes)
xlnx,xps-timer-1.00.a #0 at 0x83c00000, irq=3
Heartbeat GPIO at 0x81400000
microblaze_timer_set_mode: shutdown
microblaze_timer_set_mode: periodic
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 255324k/262144k available
ODEBUG: 3 of 3 active objects replaced
ODEBUG: selftest passed
Calibrating delay loop... 61.03 BogoMIPS (lpj=305152)
Mount-cache hash table entries: 512
net_namespace: 544 bytes
NET: Registered protocol family 16
bio: create slab <bio-0> at 0
microblaze_timer_set_mode: oneshot
Switched to high resolution mode on CPU 0
NET: Registered protocol family 2
IP route cache hash table entries: 2048 (order: 1, 8192 bytes)
TCP established hash table entries: 8192 (order: 4, 65536 bytes)
TCP bind hash table entries: 8192 (order: 3, 32768 bytes)
TCP: Hash tables configured (established 8192 bind 8192)
TCP reno registered
NET: Registered protocol family 1
ROMFS MTD (C) 2007 Red Hat, Inc.
msgmni has been set to 498
io scheduler noop registered
io scheduler anticipatory registered
io scheduler deadline registered
io scheduler cfq registered (default)
84000000.serial: ttyUL0 at MMIO 0x84000003 (irq = 8) is a uartlite
console [ttyUL0] enabled
brd: module loaded
nbd: registered device at major 43
uclinux[mtd]: RAM probe address=0x902c1b28 size=0x1b5000
Creating 1 MTD partitions on "RAM":
0x000000000000-0x0000001b5000 : "ROMfs"
TCP cubic registered
NET: Registered protocol family 17
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
VFS: Mounted root (romfs filesystem) readonly on device 31:0.
Freeing unused kernel memory: 92k freed
Mounting proc: 
Mounting var: 
Populating /var: 
Running local start scripts.
Mounting /etc/config: 
Populating /etc/config: 
flatfsd: Nonexistent or bad flatfs (-48), creating new one...
flatfsd: Failed to write flatfs (-48): No such device
flatfsd: Created 5 configuration files (185 bytes)
Mounting sysfs:
Setting hostname: 
Setting up interface lo: 
Setting up interface eth0: 
SIOCSIFADDR: No such device
Starting portmap:
Starting thttpd: 

uclinux login: 





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