Shuttle SN25P

This is just a work-in-progress status page, the port is not functional yet.

Linux kernel hangs in tty_io.c console_init() and as VGA is not working...

I started my work on Shuttle SN25P motherboard by looking at supported mainboards page, chose a supported one that has similar hardware (Asus A8N-E)

Uwe told me where to start modifiying the code to adapt it to motherboard specificities, and more importantly, where to find the information to put in place.

Hardware:

• AMD K8 Northbridge
• NVIDIA CK804 Southbridge
• ITE IT8712F Super I/O
• AMD Opteron 165 dual core Socket 939

Additionally:

• RD1 PMC4 BIOS Savior
• PMC Pm49FL004 spare flash chips for work and backup

OK:

• flashrom from linux over legacy BIOS
• Serial console
• Coreboot runs
• Load & run payload (tested OK: filo & memtest86)
• Filo loads a kernel & jump to its entry point
• Kernel start to boot and hang at the console handling code, right after "Detected 1800.234 MHz processor."

NOK:

• VGA (not in coreboot, not in filo, not in memtest86, not in linux kernel)
• Keyboard (idem)
• Etherboot (onboard nvidia ethernet adapter not properly configured by coreboot)
• Network

Files:

• Config.lb - should be OK too
• mptable.c - should be OK, linux kernel apic=debug output is identical as with legacy BIOS
• irq_tables.c - should be OK too
• get_bus_conf.c - should be OK too

Information gathering:

• getpir - infos for irq_tables.c & mptable.c
• mptable - infos for mptable.c
• superiotool - infos for Config.lb device tree
• lspci -tnvv - PCI bus tree
• lspci -vvvxx - PCI devices informations
• setpci -s 0:0:1.0 7c.L - infos for "Initialize interrupt mapping" in mptable.c
• setpci -s 0:0:1.0 80.L - infos for "Initialize interrupt mapping" in mptable.c
• setpci -s 0:0:1.0 84.L - infos for "Initialize interrupt mapping" in mptable.c

TODO:

• Make it boot to Xorg
• Test onboard HW: SATA, CDROM, USB, Firewire, mouse, keyboard, audio, fan & temperature control
• PCIe GFX & ethernet
• HPET
• ACPI
• Etherboot for BCM - TG3 PCIe 1x addon card
• LAB ? (may need bigger flash)
• Other payloads

Notes:

• Linux kernel command line options:
  • Used ones:
    • apic=debug
    • acpi=off
    • console=tty0
    • console=ttyS0,115200
    • earlycon=uart8250,io,0x3f8
    • debug
    • earlyprintk=serial,ttyS0,115200
    • loglevel=8
    • irqpoll
  • To test:
    • maxcpus=1
    • mem=256M
    • noapic
    • parport=0
    • hpet=
    • lapic
    • disable_8254_timer
    • enable_8254_timer