Hello list I have tried to port Linux 2.6 (xilinx git) to a XUPV2P board running a system implemented with EDK10.1 (Linux Version). I have fail, and I think I now why, this is a little report written for saving you some time (and maybe solving my problem if I am doing something wrong)
The board is not supported by EDK 10.1, but I have found a Board Support File form https://wiki.ittc.ku.edu that seems to work. To start I have created a design that consists on a ppc, the mpmc, an uartlite, an interrupt manager and some bram. The "basic programs" worked ok on it. I have downloaded the kernel form xilinx git and adapted the xparameters file to fit my design. I have created a toolchain using OpenEmbedded and compiled the kernel with it, then I have downloaded the binary to the board and everything works fine until "Now booting the kernel" Debugging the kernel I have found that the system crashes (Exception 0x700) setting the mmu inside "start_here" (head_4xx.S)... Because it was a crash in the "very beginning" of my kernel live I developed some simple apps to tests all my peripherals and they worked ok in real mode: All of them worked OK BUT I have created a small piece of code that tests the peripherals in virtual mode and when the program is linked to the ram the system crashes!! Strangely, it works ok when it runs from bram..... The same code works perfectly on a design created with EDK 8.1 and the kernel also works fine. I attach the source code of my test app and the OpenEmbedded parameters I have used. Best Regards ----------------- main: .globl main my_code: bl uart tlbia isync lis r3,[EMAIL PROTECTED] ori r3,r3,[EMAIL PROTECTED] mr r4,r3 iccci r0,r3 /*PID*/ li r0,0 mtpid r0 sync mem_map: /*RAM*/ lis r3,[EMAIL PROTECTED] ori r3,r3,[EMAIL PROTECTED] mr r4,r3 rlwinm r4,r4,0,0,21 ori r4,r4,768 rlwinm r3,r3,0,0,21 ori r3,r3,960 /*16M*/ li r0,0 tlbwelo r4,r0 tlbwehi r3,r0 /*BRAM*/ lis r3,[EMAIL PROTECTED] ori r3,r3,[EMAIL PROTECTED] mr r4,r3 rlwinm r4,r4,0,0,21 ori r4,r4,768 rlwinm r3,r3,0,0,21 ori r3,r3,448 /* 64K */ li r0,1 tlbwelo r4,r0 tlbwehi r3,r0 /*UARTLITE*/ lis r3,[EMAIL PROTECTED] ori r3,r3,[EMAIL PROTECTED] mr r4,r3 rlwinm r4,r4,0,0,21 ori r4,r4,263 rlwinm r3,r3,0,0,21 ori r3,r3,448 /*64K*/ li r0,2 tlbwelo r4,r0 tlbwehi r3,r0 sync on_mmu: lis r0,0 ori r0,r0,4146 mtsrr1 r0 lis r0,[EMAIL PROTECTED] ori r0,r0,[EMAIL PROTECTED] mtsrr0 r0 rfi b . uart: lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] li r14,0x0 stb r14,0x0(r11) lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] busy: lwz r10,0(r11) andi. r12,r10,8 bne+ busy lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] li r14,0x32 stb r14,0x0(r11) br rw_ram: lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] lwz r10,0(r11) lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] li r10,0xcc stb r10,0x0(r11) br rw_rom: lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] lwz r10,0(r11) lis r11,[EMAIL PROTECTED] ori r11,r11,[EMAIL PROTECTED] li r10,0xcc stb r10,0x0(r11) br bucle: bl rw_ram bl uart bl rw_rom bl bucle ------------------- OpenEmbedded Parameters: PREFERRED_VERSION_gcc = "4.2.1" PREFERRED_VERSION_gcc-cross = "4.2.1" PREFERRED_VERSION_gcc-cross-initial = "4.2.1" PREFERRED_VERSION_binutils = "2.18" PREFERRED_VERSION_binutils-cross = "2.18" PREFERRED_VERSION_glibc = "2.5" PREFERRED_VERSION_glibc-intermediate = "2.5" PREFERRED_VERSION_linux-libc-headers = "2.6.25" -- Ricardo Ribalda http://www.eps.uam.es/~rribalda/ _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
