Re: [Qemu-devel] OS/2 PPC booting making some progress(sorry this has correct entry point :)

[Tero Kaarlela <turo.kaarlela@co.inet.fi>]

>  
> Hi,
>
>    I have made some modifications to PPC PREP booting to get OS/2 
> bootloader working. Now I hopefully have made some progress (it isn't 
> working yet but has gone forward on my opinion). So I have few 
> questions at the moment:
>
>   1. on debug 1. Is the opcode really invalid or just unsupported one?
>   2. on debug 2. What is this unaffected IO port 838 it tries to read 
> & write ?
>   3. Might that unsupported ioport prevent booting?
>   1.   Booted with qemu-system-ppc -dummy-net -nographic -prep -cdrom 
> os2.iso
>      (and giving boot device ide_cdrom0)
>
> Boot: 00ec0500 47ff0800 00000000 00000000
> Bootinfos at : 200000
>
> Now boot it... (0)
>
> stack: 5bfff70 malloc_base: 0 0x05800000 0x06000000
> PREP boot... 15ea00 100000
> inb: port=0x0010
> ERROR: unaffected IO port: 0814 read
> Entering Little Endian mode...
> outb: port=0x0280 data=0xc0
>
> IBM Microkernel Bootloader (Power PC, Little Endian)
> Press ENTER for manual boot...........
> [PN_BOOT_DEV="automatic"] ide_cdrom0  (gave this device manually)  
> ide: read addr=0x1f7 val=00
> IDE: write addr=0x1f6 val=0xa0
> IDE: write addr=0x1f7 val=0xa1
> ide: CMD=a1
> ide: read addr=0x1f7 val=00
> Device initialization failed
> invalid/unsupported opcode: 02 - 04 - 01 (08000048) 0x00000300 0
> invalid/unsupported opcode: 02 - 04 - 01 (08000048) 0x00000700 0
>
> Crashed!!
>
> 2. This works better(because ide_cdrom is actully there)
> 2. Booted with qemu-system-ppc -dummy-net -nographic -prep -cdrom os2.iso
> (and giving boot device ide_cdrom2 + filesystem FAT_HARDDISK)
>
> Boot: 00ec0500 47ff0800 00000000 00000000
> Bootinfos at : 200000
>
> Now boot it... (0)
>
> stack: 5bfff70 malloc_base: 0 0x05800000 0x06000000
> PREP boot... 15ea00 100000
> inb: port=0x0010
> ERROR: unaffected IO port: 0814 read
> Entering Little Endian mode...
> outb: port=0x0280 data=0xc0
>
> IBM Microkernel Bootloader (Power PC, Little Endian)
> Press ENTER for manual boot...........
> [PN_BOOT_DEV="automatic"] ide_cdrom2 (gave this manually)
> ide: read addr=0x177 val=40
> IDE: write addr=0x176 val=0xa0
> IDE: write addr=0x177 val=0xa1
> ide: CMD=a1
> ide: read addr=0x177 val=48
> dma: read_chan 0x4 -> 14336
> dma: read_chan 0x4 -> 14336
> ide: write control addr=0x376 val=08
> ERROR: unaffected IO port: 0838 read
> ERROR: unaffected IO port write: 0838 => fd
> ide: read addr=0x177 val=40
> ide: read addr=0x177 val=40
> IDE: write addr=0x171 val=0x00
> IDE: write addr=0x174 val=0x00
> IDE: write addr=0x175 val=0x08
> IDE: write addr=0x176 val=0xa0
> IDE: write addr=0x177 val=0xa0
> ide: CMD=a0
> ide: read addr=0x177 val=48
> ide: read addr=0x172 val=01
> ide: read addr=0x177 val=48
> ATAPI limit=0x800 packet: 00 00 00 00 00 00 00 00 00 00 00 00
> ERROR: unaffected IO port: 0838 read
> ide: read addr=0x177 val=40
> ERROR: unaffected IO port: 0838 read
> ERROR: unaffected IO port write: 0838 => fd
> ide: read addr=0x172 val=03
> [PN_BOOT_FS="automatic"] FAT_HARDDISK (gave this manually but should 
> be automatically regognized other option is FAT_FLOPPY)
> ide: read addr=0x177 val=40
> ide: read addr=0x177 val=40
> IDE: write addr=0x171 val=0x00
> IDE: write addr=0x174 val=0x00
> IDE: write addr=0x175 val=0x08
> IDE: write addr=0x176 val=0xa0
> IDE: write addr=0x177 val=0xa0
> ide: CMD=a0
> ide: read addr=0x177 val=48
> ide: read addr=0x172 val=01
> ide: read addr=0x177 val=48
> ATAPI limit=0x800 packet: 28 00 00 00 00 00 00 00 01 00 00 00
> read: LBA=0 nb_sectors=1
> reply: tx_size=2048 elem_tx_size=0 index=2048
> byte_count_limit=2048
> status=0x48
> ERROR: unaffected IO port: 0838 read
> ide: read addr=0x177 val=48
> ERROR: unaffected IO port: 0838 read
> ERROR: unaffected IO port write: 0838 => fd
> ide: read addr=0x172 val=02
> ide: read addr=0x174 val=00
> ide: read addr=0x175 val=08
> reply: tx_size=0 elem_tx_size=0 index=2048
> status=0x40
> ERROR: unaffected IO port: 0838 read
> ide: read addr=0x177 val=40
> ERROR: unaffected IO port: 0838 read
> ERROR: unaffected IO port write: 0838 => fd
> ide: read addr=0x172 val=03
> we did NOT read the MBR!
>
> Bootloader:  *** Reserved Exception (0x0) ***
>
> srr0 = 0x15f068
> srr1 = 0x2031
> dsisr= 0x0
> dar  = 0x0
>
> Bootloader:  Entering infinite loop.
>
> Tero
>
>
>
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