Re: HPA and failed opcode was: 0x37 ?

[Sergei Shtylyov <sshtylyov@ru.mvista.com>]

Hello.

Steven Scholz wrote:
> Sergei,

>>>The FPGA does nothing except decoding adresseses from the ARM cpu,
>>>controlling the A[2..0], CS[1..0], IOR, IOW lines of the HDD.

>>   I've not seen you quoting the code that sets ofsset for the
>>IDE_CONTROL_REG, BTW... Without this register, LBA48 is completely broken

>         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
>                 hw.io_ports[i] = ide_virt_base + (i << 1);
>         }

>         hw.io_ports[IDE_CONTROL_OFFSET] = ide_virt_base + 0x10;

> Thus it has an offset 0x10 from the base address.

> ide0 at 0xc3856000-0xc3856007,0xc3856010 on irq 27

> But I just noticed that A[2..0] should look like "110" when accessing the
> "Device Control Register". Thus the offset should be 0x16 instead! Right?

    If your FPGA passes A[2..0] untouched to the IDE bus, it's certainly 
wrong. It must pass 110.

> --
> Steven

MBR, Sergei