Buildroot is a set of Makefiles and patches that makes it easy to generate a complete embedded Linux system. Buildroot can generate any or all of a cross-compilation toolchain, a root filesystem, a kernel image and a bootloader image.
BSP already configured for SPARC with hardware MUL (V8) and FPU. The rootfs will be located in the initrd ramfs inside the kernel. For that would build all of this do:
make
This will build toolchain, rootfs image and linux kernel. Check that all is well possible for the new files in output/images: rootfs.initramfs and zImage
For build DSU image change dir to board/leon3 and run:
./make_dsu
It creates a file output/images/image.dsu. Start grmon (with -nb):
grmon-eval -uart /dev/ttyUSB0 -baud 460800 -nb
Load and run image:
grlib> load image.dsu section: .stage2 at 0x40000000, size 10240 bytes section: .vmlinux at 0x40004000, size 3582524 bytes total size: 3592764 bytes (329.2 kbit/s) read 10539 symbols entry point: 0x40000000 grlib> run
Serial console with baud rate 38400 out is:
PROMLIB: Sun Boot Prom Version 0 Revision 0 Linux version 3.0.0 (master@linux-xynp) (gcc version 4.4.5 (Buildroot 2011.02) ) #2 Fri Jul 29 22:43:40 MSD 2011 bootconsole [earlyprom0] enabled ARCH: LEON TYPE: Leon3 System-on-a-Chip Ethernet address: 00:00:7c:cc:01:45 CACHE: direct mapped cache, set size 4k CACHE: not flushing on every context switch Boot time fixup v1.6. 4/Mar/98 Jakub Jelinek (jj@ultra.linux.cz). Patching kernel for srmmu[LEON]/iommu OF stdout device is: /a::a PROM: Built device tree with 9379 bytes of memory. Booting Linux... Built 1 zonelists in Zone order, mobility grouping on. Total pages: 15355 Kernel command line: console=ttyS0,38400 rootfs=/dev/ram0 init=/sbin/init PID hash table entries: 256 (order: -2, 1024 bytes) Dentry cache hash table entries: 8192 (order: 3, 32768 bytes) Inode-cache hash table entries: 4096 (order: 2, 16384 bytes) Memory: 59116k/65536k available (2108k kernel code, 6420k reserved, 536k data, 840k init, 0k highmem) NR_IRQS:64 Console: colour dummy device 80x25 console [ttyS0] enabled, bootconsole disabled console [ttyS0] enabled, bootconsole disabled Calibrating delay loop... 72.90 BogoMIPS (lpj=364544) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 NET: Registered protocol family 16 bio: create slab <bio-0> at 0 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 UDP hash table entries: 256 (order: 0, 4096 bytes) UDP-Lite hash table entries: 256 (order: 0, 4096 bytes) NET: Registered protocol family 1 ROMFS MTD (C) 2007 Red Hat, Inc. msgmni has been set to 115 io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) Serial: GRLIB APBUART driver 80000001: ttyS0 at MMIO 0x80000100 (irq = 2) is a GRLIB/APBUART grlib-apbuart at 0x80000100, irq 2 brd: module loaded loop: module loaded TCP cubic registered NET: Registered protocol family 17 Registering the dns_resolver key type leon: power management initialized drivers/rtc/hctosys.c: unable to open rtc device (rtc0) Freeing unused kernel memory: 840k freed Initializing random number generator... done. Welcome to Buildroot buildroot login:
Login “root” without password.
You can try dhrystone test:
# dhrystone
Dhrystone Benchmark, Version 2.1 (Language: C)
Program compiled without 'register' attribute
Please give the number of runs through the benchmark: 400000
Execution starts, 400000 runs through Dhrystone
Execution ends
Final values of the variables used in the benchmark:
Int_Glob: 5
should be: 5
Bool_Glob: 1
should be: 1
Ch_1_Glob: A
should be: A
Ch_2_Glob: B
should be: B
Arr_1_Glob[8]: 7
should be: 7
Arr_2_Glob[8][7]: 400010
should be: Number_Of_Runs + 10
Ptr_Glob->
Ptr_Comp: 151560
should be: (implementation-dependent)
Discr: 0
should be: 0
Enum_Comp: 2
should be: 2
Int_Comp: 17
should be: 17
Str_Comp: DHRYSTONE PROGRAM, SOME STRING
should be: DHRYSTONE PROGRAM, SOME STRING
Next_Ptr_Glob->
Ptr_Comp: 151560
should be: (implementation-dependent), same as above
Discr: 0
should be: 0
Enum_Comp: 1
should be: 1
Int_Comp: 18
should be: 18
Str_Comp: DHRYSTONE PROGRAM, SOME STRING
should be: DHRYSTONE PROGRAM, SOME STRING
Int_1_Loc: 5
should be: 5
Int_2_Loc: 13
should be: 13
Int_3_Loc: 7
should be: 7
Enum_Loc: 1
should be: 1
Str_1_Loc: DHRYSTONE PROGRAM, 1'ST STRING
should be: DHRYSTONE PROGRAM, 1'ST STRING
Str_2_Loc: DHRYSTONE PROGRAM, 2'ND STRING
should be: DHRYSTONE PROGRAM, 2'ND STRING
Microseconds for one run through Dhrystone: 16.5
Dhrystones per Second: 60514.4
Or Lua language interpreter:
# lua Lua 5.1.4 Copyright (C) 1994-2008 Lua.org, PUC-Rio > print(2+2) 4 >
That would adjust the toolchain or rootfs package selection do:
make menuconfig
For customize busybox do:
make busybox-menuconfig
And for tuning linux kernel do:
make linux-menuconfig
After that everything must be rebuilt:
make
And do not forget rebuild the DSU image