[LinuxBIOS] [PATCH] Some more 440BX progress

[Uwe Hermann]

Hi,

here's a first patch for the 440BX code and the Tyan S1846 and the 82371EB
southbridge which gets my Tyan S1846 a lot further in the boot process.

However, it cannot boot a payload, yet.

It seems the major problem was that I did ram_check() on the whole range
from 0 - 64 MB (in my case; I use a 64 MB DIMM for testing). This cannot
work of course, as the range from 640 KB - 1 MB is _not_ RAM but rather
reserved for all kinds of other stuff (thanks Stefan for pointing this out!).

Leaving out that range, but checking the rest of RAM, I get a
"DRAM range verified", so it seems RAM init _does_ work after all.
(it's hardcoded to my board and setup of course, but that'll be fixed)

I've tried setting up the PCI devices correctly in Config.lb, but I'm
absolutely not sure that I got it all right. Can somebody please check
this and let me know of any stupid errors I made?

Here's the lspci output from the Tyan S1846:

00:00.0 0600: 8086:7190 (rev 03)
00:01.0 0604: 8086:7191 (rev 03)
00:07.0 0601: 8086:7110 (rev 02)
00:07.1 0101: 8086:7111 (rev 01)
00:07.2 0c03: 8086:7112 (rev 01)
00:07.3 0680: 8086:7113 (rev 02)
00:10.0 0300: 5333:5631 (rev 06)
00:11.0 0200: 10ec:8029

00:00.0 Host bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge (rev 03)
00:01.0 PCI bridge: Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge (rev 03)
00:07.0 ISA bridge: Intel Corporation 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corporation 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corporation 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corporation 82371AB/EB/MB PIIX4 ACPI (rev 02)
00:10.0 VGA compatible controller: S3 Inc. 86c325 [ViRGE] (rev 06)
00:11.0 Ethernet controller: Realtek Semiconductor Co., Ltd.  RTL-8029(AS)

-[0000:00]-+-00.0  Intel Corporation 440BX/ZX/DX - 82443BX/ZX/DX Host bridge
           +-01.0-[0000:01]--
           +-07.0  Intel Corporation 82371AB/EB/MB PIIX4 ISA
           +-07.1  Intel Corporation 82371AB/EB/MB PIIX4 IDE
           +-07.2  Intel Corporation 82371AB/EB/MB PIIX4 USB
           +-07.3  Intel Corporation 82371AB/EB/MB PIIX4 ACPI
           +-10.0  S3 Inc. 86c325 [ViRGE]
           -11.0  Realtek Semiconductor Co., Ltd. RTL-8029(AS)

(5333:5631 and 10ec:8029 are add-on cards -- VGA and Ethernet)

And this is my current try to setup Config.lb:

chip northbridge/intel/i440bx # Northbridge
       device pci_domain 0 on 
               device pci 0.0 on end # Host bridge
               device pci 1.0 off end # PCI bridge  TODO: AGP bridge?
               # device pci 7.0 on end # ISA bridge
               chip southbridge/intel/i82371eb # Southbridge
                       device pci 7.0 on # ISA bridge ???
                               chip superio/nsc/pc87309 # Super I/O
                                       device pnp 2e.0 on end # Floppy
                                       device pnp 2e.1 on end # Parallel port
                                       device pnp 2e.2 on end # Com2
                                       device pnp 2e.3 on # Com1
                                               io 0x60 = 0x3f8
                                               irq 0x70 = 4
                                       end
                                       device pnp 2e.4 on end # Power mgmt.
                                       device pnp 2e.5 on end # Mouse
                                       device pnp 2e.6 on # Keyboard
                                               io 0x60 = 0x60
                                               io 0x62 = 0x64
                                               irq 0x70 = 1
                                               irq 0x72 = 12 # ???
                                       end
                               end
                               device pci 7.1 on end # IDE
                               device pci 7.2 on end # USB
                               device pci 7.3 on end # ACPI
                       end
               end
       end
       chip cpu/intel/slot_2
       end
end

Does that look correct?

Also, a full boot log is attached. The PCI init _seems_ to work, at
least partially.

The current end of the story is that elfboot cannot find the payload,
not sure why. Wrong PCI init? Wrong RAM init? Wrong payload location?

Thanks, Uwe.