X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=doc%2FREADME.qemu_mips;h=3985264245d611cd0fb8d0a07655119e86d6902c;hb=cdc51c294ad33879c4e57edf4c9d2155381b1d59;hp=472469f98de66385579909d34e11a1f106af9311;hpb=d459516188af37da22a3b86914dbd81d83fac79f;p=u-boot diff --git a/doc/README.qemu_mips b/doc/README.qemu_mips index 472469f98d..3985264245 100644 --- a/doc/README.qemu_mips +++ b/doc/README.qemu_mips @@ -17,19 +17,103 @@ create image: start it: # qemu-system-mips -M mips -pflash flash -monitor null -nographic +2) Download kernel + initrd + +On ftp://ftp.denx.de/pub/contrib/Jean-Christophe_Plagniol-Villard/qemu_mips/ +you can downland + +#config to build the kernel +qemu_mips_defconfig +#patch to fix mips interupt init on 2.6.24.y kernel +qemu_mips_kernel.patch +initrd.gz +vmlinux +vmlinux.bin +System.map + +4) Generate uImage + +# tools/mkimage -A mips -O linux -T kernel -C gzip -a 0x80010000 -e 0x80245650 -n "Linux 2.6.24.y" -d vmlinux.bin.gz uImage + +5) Copy uImage to Flash +# dd if=uImage bs=1k conv=notrunc seek=224 of=flash + +6) Generate Ide Disk + +# dd of=ide bs=1k cout=100k if=/dev/zero + +# sfdisk -C 261 -d ide +# partition table of ide +unit: sectors + + ide1 : start= 63, size= 32067, Id=83 + ide2 : start= 32130, size= 32130, Id=83 + ide3 : start= 64260, size= 4128705, Id=83 + ide4 : start= 0, size= 0, Id= 0 + +7) Copy to ide + +# dd if=uImage bs=512 conv=notrunc seek=63 of=ide + +8) Generate ext2 on part 2 on Copy uImage and initrd.gz + +# Attached as loop device ide offset = 32130 * 512 +# losetup -o 16450560 -f ide +# Format as ext2 ( arg2 : nb blocks) +# mke2fs /dev/loop0 16065 +# losetup -d /dev/loop0 +# Mount and copy uImage and initrd.gz to it +# mount -o loop,offset=16450560 -t ext2 ide /mnt +# mkdir /mnt/boot +# cp {initrd.gz,uImage} /mnt/boot/ +# Umount it +# umount /mnt + +9) Set Environment + +setenv rd_start 0x80800000 +setenv rd_size 2663940 +setenv kernel BFC38000 +setenv oad_addr 80500000 +setenv load_addr2 80F00000 +setenv kernel_flash BFC38000 +setenv load_addr_hello 80200000 +setenv bootargs 'root=/dev/ram0 init=/bin/sh' +setenv load_rd_ext2 'ide res; ext2load ide 0:2 ${rd_start} /boot/initrd.gz' +setenv load_rd_tftp 'tftp ${rd_start} /initrd.gz' +setenv load_kernel_hda 'ide res; diskboot ${load_addr} 0:2' +setenv load_kernel_ext2 'ide res; ext2load ide 0:2 ${load_addr} /boot/uImage' +setenv load_kernel_tftp 'tftp ${load_addr} /qemu_mips/uImage' +setenv boot_ext2_ext2 'run load_rd_ext2; run load_kernel_ext2; run addmisc; bootm ${load_addr}' +setenv boot_ext2_flash 'run load_rd_ext2; run addmisc; bootm ${kernel_flash}' +setenv boot_ext2_hda 'run load_rd_ext2; run load_kernel_hda; run addmisc; bootm ${load_addr}' +setenv boot_ext2_tftp 'run load_rd_ext2; run load_kernel_tftp; run addmisc; bootm ${load_addr}' +setenv boot_tftp_hda 'run load_rd_tftp; run load_kernel_hda; run addmisc; bootm ${load_addr}' +setenv boot_tftp_ext2 'run load_rd_tftp; run load_kernel_ext2; run addmisc; bootm ${load_addr}' +setenv boot_tftp_flash 'run load_rd_tftp; run addmisc; bootm ${kernel_flash}' +setenv boot_tftp_tftp 'run load_rd_tftp; run load_kernel_tftp; run addmisc; bootm ${load_addr}' +setenv load_hello_tftp 'tftp ${load_addr_hello} /examples/hello_world.bin' +setenv go_tftp 'run load_hello_tftp; go ${load_addr_hello}' +setenv addmisc 'setenv bootargs ${bootargs} console=ttyS0,${baudrate} rd_start=${rd_start} rd_size=${rd_size} ethaddr=${ethaddr}' +setenv bootcmd 'run boot_tftp_flash' + +10) Now you can boot from flash, ide, ide+ext2 and tfp + +# qemu-system-mips -M mips -pflash flash -monitor null -nographic -net nic -net user -tftp `pwd` -hda ide + II) How to debug U-Boot In order to debug U-Boot you need to start qemu with gdb server support (-s) and waiting the connection to start the CPU (-S) -# qemu-system-mips -S -s -M mips -pflash flash -monitor null -nographic +# qemu-system-mips -S -s -M mips -pflash flash -monitor null -nographic -net nic -net user -tftp `pwd` -hda ide in an other console you start gdb 1) Debugging of U-Boot Before Relocation Before relocation, the addresses in the ELF file can be used without any problems -buy connecting to the gdb server localhost:1234 +by connecting to the gdb server localhost:1234 # mipsel-unknown-linux-gnu-gdb u-boot GNU gdb 6.6 @@ -42,7 +126,7 @@ This GDB was configured as "--host=i486-linux-gnu --target=mipsel-unknown-linux- (gdb) target remote localhost:1234 Remote debugging using localhost:1234 _start () at start.S:64 -64 RVECENT(reset,0) /* U-boot entry point */ +64 RVECENT(reset,0) /* U-boot entry point */ Current language: auto; currently asm (gdb) b board.c:289 Breakpoint 1 at 0xbfc00cc8: file board.c, line 289. @@ -50,7 +134,7 @@ Breakpoint 1 at 0xbfc00cc8: file board.c, line 289. Continuing. Breakpoint 1, board_init_f (bootflag=) at board.c:290 -290 relocate_code (addr_sp, id, addr); +290 relocate_code (addr_sp, id, addr); Current language: auto; currently c (gdb) p/x addr $1 = 0x87fa0000 @@ -68,7 +152,7 @@ No symbol table is loaded. Use the "file" command. No symbol file now. (gdb) add-symbol-file u-boot 0x87fa0000 add symbol table from file "u-boot" at - .text_addr = 0x87fa0000 + .text_addr = 0x87fa0000 (y or n) y Reading symbols from /private/u-boot-arm/u-boot...done. Breakpoint 1 at 0x87fa0cc8: file board.c, line 289. @@ -77,4 +161,4 @@ Continuing. Program received signal SIGINT, Interrupt. 0xffffffff87fa0de4 in udelay (usec=) at time.c:78 -78 while ((tmo - read_c0_count()) < 0x7fffffff) +78 while ((tmo - read_c0_count()) < 0x7fffffff)