Re: Re: Addressing PCI memory

----- Original Message -----
From: ashish anand <redacted>
To: Amelia De Vivo <redacted>;
[off-list ref]
Sent: Wednesday, May 16, 2001 6:40 PM
Subject: Re: Addressing PCI memory

Amelia De Vivo wrote:

quoted

Hi all, I'm trying to write a driver for a 64 bit PCI device. Something

like

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this works well under i386 Linux, but it doesn't work at all for Linux
2.2.15 by Yellow Dog:

    struct pci_dev *dev = NULL;
    dev = pci_find_device(vendor, device, dev);
    pci_read_config_dword(dev, PCI_BASE_ADDRESS_0, &cards[0].addr0);
    cards[0].vaddr = (void *) ioremap((cards[0].addr0 &
PCI_BASE_ADDRESS_MEM_MASK), cards[0].size);
    writeb('A',(cards[0].vaddr)+0x1000);

 READ PCI STATUS REGISTER TO CHECK FOR ANY MASTER/TARGET ABORT.

Thanks for your reply.
I read the pci status register and there wasn't any master/target abort

  LASTLY WHAT IS THE VALUE OF cards[0].size ?

This is 0x2000000

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I have a kernel panic on writeb. Has someone some suggestion?

LET ME KNOW THE PANIC MESSAGE....

kernel panic: machine check

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Thanks in advance

Amelia

Bye Amelia

quoted

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