Hello List,
I am currently trying to build an emulated linux system for arm using all new U-BOOT, Kernel, rootfs stuff. And I was stucked with the problem that I cannot run u-boot-2010.12.tar.bz2 downloaded from ftp://ftp.denx.de/pub/u-boot/ under qemu. Meanwhile u-boot-2010.09.tar.bz2 runs perfectly. Here is what I have and what I did:
My platform: Host PC: OpenSUSE 11.3 x86-64 with all latest patches (kernel 2.6.34.7-0.7-desktop #1 SMP PREEMPT 2010-12-13 11:13:53 +0100 x86_64 x86_64 x86_64) GNU arm cross compiler: arm-none-eabi-gcc (Sourcery G++ Lite 2010.09-51) 4.5.1 QEMU: QEMU PC emulator version 0.12.4
What i did after I unpacked the archive:
$ ~/ARM/U-boot/u-boot-2010.12> make versatilepb_config ARCH=arm CROSS_COMPILE=arm-none-eabi-
This worked fine
$~/ARM/U-boot/u-boot-2010.12> make all ARCH=arm CROSS_COMPILE=arm-none-eabi-
This resulted into error not finding CONFIG_SYS_SDRAM_BASE and CONFIG_SYS_INIT_SP_ADDR definitions.
I edited the include/configs/versatile.h file adding there two definitions: #define CONFIG_SYS_SDRAM_BASE PHYS_SDRAM_1 #define CONFIG_SYS_INIT_SP_ADDR (CONFIG_SYS_TEXT_BASE \ - GENERATED_GBL_DATA_SIZE)
And then re-launched u-boot compilation envoking: $~/ARM/U-boot/u-boot-2010.12> make all ARCH=arm CROSS_COMPILE=arm-none-eabi-
This time everything went smoothly and I got compiled u-boot.bin.
But when I started it under QEMU: ~/ARM/U-boot/u-boot-2010.12> qemu-system-arm -M versatilepb -m 128M -nographic -kernel u-boot.bin
This resulted in:
qemu: fatal: Trying to execute code outside RAM or ROM at 0xff000738
R00=fffcbf70 R01=ffff0000 R02=00000000 R03=01000000 R04=ffff0000 R05=fffcbf70 R06=ffff0000 R07=00000000 R08=00ffff80 R09=feff0000 R10=0101dd58 R11=00000000 R12=fffcbfe8 R13=fffcbf68 R14=ff000738 R15=ff000738 PSR=600001d3 -ZC- A svc32
I also tried to debug this problem trying to launch it under QEMU with -s -S flags and envoking DBG. But still got nothing as remote DBG showed pretty strange startup dump which does not correlate with u-boot startup source code at all:
(gdb) target remote localhost:1234 gdbarch_find_by_info: info.bfd_arch_info arm gdbarch_find_by_info: info.byte_order 1 (little) gdbarch_find_by_info: info.osabi 0 (none) gdbarch_find_by_info: info.abfd 0x0 gdbarch_find_by_info: info.tdep_info 0x0 gdbarch_find_by_info: Previous architecture 0x83da790 (arm) selected gdbarch_update_p: New architecture 0x83da790 (arm) selected gdbarch_find_by_info: info.bfd_arch_info arm gdbarch_find_by_info: info.byte_order 1 (little) gdbarch_find_by_info: info.osabi 0 (none) gdbarch_find_by_info: info.abfd 0x0 gdbarch_find_by_info: info.tdep_info 0x0 gdbarch_find_by_info: Previous architecture 0x83f2910 (arm) selected gdbarch_update_p: New architecture 0x83f2910 (arm) selected 0x00000000 in ?? () => 0x00000000: 00 00 a0 e3 mov r0, #0 (gdb) nexti Prologue scan stopped at 0xe39ffff8 Prologue scan stopped at 0xe39ffff8 0x00000004 in ?? () => 0x00000004: 83 10 a0 e3 mov r1, #131 ; 0x83 (gdb)
Please help,
Dmitriy