qemu -append problem with zynq_linux

[mpefareo]

Hello, sorry for may be stupid question, just learning Zynq.

I have got zynq_linux.tar.gz file unpacked.

I'm trying to run qemu with -append option:

./arm-softmmu/qemu-system-arm -hda ./file.img -M xilinx-zynq-a9 -m 1024 -serial null -serial mon:stdio -kern-dtb ./xilinx_zynq.dtb -smp 2 -nographic -kernel kernel/zImage -initrd filesystem/ramdisk.img -append "root=/dev/hda rw rootfs=ext2 panic=1"

In qemu output:

ram size=40000000
error reading QSPI block device
error no mtd drive for nand flash
a0mpcore_priv: smp_priv_base f8f00000
error no sd drive for sdhci controller (0)
error no sd drive for sdhci controller (1)
Number of configured NICs 0x1
ram_size 40000000, board_id d32, loader_start 0
Uncompressing Linux... done, booting the kernel.
Linux version 3.0.0-01282-g90e010b-dirty (linnj@xsjlinnj40) (gcc version 4.5.2 (Sourcery CodeBench Lite 2011.07-57) ) #289 SMP PREEMPT Tue Feb 14 09:54:05 PST 2012
CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c5387d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Xilinx Zynq Platform, model: Xilinx Zynq EP107
bootconsole [earlycon0] enabled
Memory policy: ECC disabled, Data cache writealloc
PERCPU: Embedded 7 pages/cpu @c0610000 s4928 r8192 d15552 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 60928
Kernel command line: console=ttyPS0,115200 root=/dev/ram rw initrd=0x800000,8M earlyprintk ip=:::::eth0:dhcp
...

the kernel command line is not what I have expected (-append "root=/dev/hda rw rootfs=ext2 panic=1")? Why?

Second question:

As it comes start_qemu.sh;

./arm-softmmu/qemu-system-arm -M xilinx-zynq-a9 -m 1024 -serial null -serial mon:stdio -kern-dtb ./xilinx_zynq.dtb -smp 2 -nographic -kernel kernel/zImage ...

has got option -m 1024

when qemu start bash:

zynq> free -m
             total         used         free       shared      buffers
Mem:           233           17          216            0            0
-/+ buffers:                 16          216
Swap:            0            0            0

 returns about 256MB, so is the output of the kernel

ram size=40000000
error reading QSPI block device
error no mtd drive for nand flash
a0mpcore_priv: smp_priv_base f8f00000
error no sd drive for sdhci controller (0)
error no sd drive for sdhci controller (1)
Number of configured NICs 0x1
ram_size 40000000, board_id d32, loader_start 0
Uncompressing Linux... done, booting the kernel.
Linux version 3.0.0-01282-g90e010b-dirty (linnj@xsjlinnj40) (gcc version 4.5.2 (Sourcery CodeBench Lite 2011.07-57) ) #289 SMP PREEMPT Tue Feb 14 09:54:05 PST 2012
CPU: ARMv7 Processor [410fc090] revision 0 (ARMv7), cr=10c5387d
CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache
Machine: Xilinx Zynq Platform, model: Xilinx Zynq EP107
bootconsole [earlycon0] enabled
Memory policy: ECC disabled, Data cache writealloc
PERCPU: Embedded 7 pages/cpu @c0610000 s4928 r8192 d15552 u32768
Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 60928
Kernel command line: console=ttyPS0,115200 root=/dev/ram rw initrd=0x800000,8M earlyprintk ip=:::::eth0:dhcp
PID hash table entries: 1024 (order: 0, 4096 bytes)
Dentry cache hash table entries: 32768 (order: 5, 131072 bytes)
Inode-cache hash table entries: 16384 (order: 4, 65536 bytes)
Memory: 240MB = 240MB total
Memory: 231072k/231072k available, 31072k reserved, 0K highmem
Virtual kernel memory layout:
    vector  : 0xffff0000 - 0xffff1000   (   4 kB)
    fixmap  : 0xfff00000 - 0xfffe0000   ( 896 kB)
    DMA     : 0xffc00000 - 0xffe00000   (   2 MB)
    vmalloc : 0xd0800000 - 0xe0000000   ( 248 MB)
    lowmem  : 0xc0000000 - 0xd0000000   ( 256 MB)
    pkmap   : 0xbfe00000 - 0xc0000000   (   2 MB)
    modules : 0xbf000000 - 0xbfe00000   (  14 MB)
      .init : 0xc0008000 - 0xc002c000   ( 144 kB)
      .text : 0xc002c000 - 0xc03c9428   (3702 kB)
      .data : 0xc03ca000 - 0xc03f25a0   ( 162 kB)
       .bss : 0xc03f25c4 - 0xc040a3cc   (  96 kB)

Why 256MB and not 1G?