coreboot June 2005

coreboot@coreboot.org

35 participants
100 discussions

[LinuxBIOS] How to study the source code...?
by Huang-Jen Wang 21 Jun '05

21 Jun '05

Dear all, Recently I am studying the source code , because I want to try to porting new mainboard later, but it is not easy to realize source code I begin my study from the src/southbridge/amd8111/amd8111.c There are some lines that I can't understand even I have amd8111 datasheet....hope you can tell me 1.devfn = bus_dev->path.u.pci.devfn + (1 << 3); 2.index = ((dev->path.u.pci.devfn & ~7) >> 3) + 8; 3.devfn = (dev->path.u.pci.devfn) & ~7; Thanks advanced... HJ Wang

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[LinuxBIOS] Init wierdness without initrd - kernel 2.6.x
by Hamish Guthrie 21 Jun '05

21 Jun '05

I am wondering if anyone has come across this strange anomoly I am seeing: I have a device with an 8M NAND device, and running short of RAM. I am using SquashFS for the root filesystem. If I use a tftpboot scenario with an initrd, everything functions correctly. I am wanting to get rid of the initrd completely, and use a CramFS root filesystem directly on the NAND flash device. I set everything up correctly and am able to mount the root filesystem and execute /sbin/init directly from the … [View More]

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[LinuxBIOS] VIA's KT400 + VT82C8231
by Anton Borisov 21 Jun '05

21 Jun '05

Hello. ASUS A7V8X-X carries northbridge KT400 and southbridge VT82C8231. FlashChip is PMC. flash_and_rom enables writes to flash and freezes system. Any workarounds? -- Sincerely, Anton Borisov

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RE: [BULK] RE: [LinuxBIOS] FYI: AMD support for cache as ram.
by YhLu 20 Jun '05

20 Jun '05

make the cache_as_ram_auto for init.o to use printk now, #if CONFIG_USE_INIT printk_debug("linxbios_ram.bin length = %08x\r\n", olen); #else print_debug("linxbios_ram.bin length = "); print_debug_hex32(olen); print_debug("\r\n"); #endif there is some space for optimize code for the raminit and ht init in auto ...... The 8 way system get most benefit from the cache-as-ram solution. 1. with romcc, the compile time may need 5 minutes and can not enable vga support 2. win … [View More]

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[LinuxBIOS] ROMCC bug
by Steve Magnani 20 Jun '05

20 Jun '05

I've stumbled across a ROMCC bug that results in incorrect code being generated. As near as I can tell, multi-layer "if" statements are at risk of being miscompiled when optimization is enabled. The following program snippet induces the bug when compiled via "romcc -mcpu=p4 -O2" (or -O): /************************************************/ void die(void) { } static void miscompiled_function(unsigned short param) { unsigned int data = __builtin_inl(0); if (data == 0) param = 12; else … [View More]

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[LinuxBIOS] EPIA-M Code
by Anton Borisov 20 Jun '05

20 Jun '05

Hello. I've played with EPIA-M tree recently. Interesting facts: 1) I'm always turning to "fallback" image. How LB decides which image to load? I guess this is done with CMOS entry (which one?), but I want boot VIA's AwardBIOS as well as LB (by switching Flash Chips in BIOS Savior). 2) I included file minicom.capped1.bz2. It's a minicom's output. I bet jmp_to_elf_entry() do the wrong staff (src/arch/i386/boot/boot.c) thus not loading payload at all. 3) Moreover. Looking at minicom.capped2.… [View More]

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[LinuxBIOS] EPIA-M Code (bz2)
by Anton Borisov 20 Jun '05

20 Jun '05

My apologies. Didn't attach anything :) -- Sincerely, Anton Borisov

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Re: [LinuxBIOS] CN400 support
by Dave Ashley 19 Jun '05

19 Jun '05

>cn400 & vt8237 support is in the works. Is there anything I can do to assist? For example I can supply one or more EPIA-SP 800 mhz boards, we have some of them. Possibly I can make funds available to get developers to focus on the problem. At the very least I can test + offer feedback. I'm trying to come up with alternatives to diving in and doing it myself :^). -Dave

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[LinuxBIOS] Mainboard Config.lb file
by Huang-Jen Wang 19 Jun '05

19 Jun '05

Dear all, Is there a utiltiy to help generate a new mainboard config.lb file or a document described how to write mainboard config.lb file.... thanks HJ Wang

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[LinuxBIOS] A question in auto.c
by Huang-Jen Wang 18 Jun '05

18 Jun '05

Dear all, One part of auto.c, I can't understand , hope you can tell me. In the "static unsigned int generate_row(uint8_t node, uint8_t row, uint8_t maxnodes)" function, how do I get the values of "static const unsigned int rows_4p[4][4]" array , I see an example : /* Link0 of CPU0 to Link0 of CPU1 */ /* Link1 of CPU0 to Link2 of CPU2 */ /* Link2 of CPU1 to Link1 of CPU3 */ /* Link0 of CPU2 to Link0 of CPU3 */ static const unsigned int rows_4p[4][4] = { { 0x00070101, … [View More]

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coreboot June 2005