# Re: \[Dri-devel\] PPC Lockup (ati-pcigart-branch)

- From: Dan Malek \<hidden\>
- Date: 2001-01-23 00:24:17 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2001/01/9374793
- Thread: https://ratatoskr.run/linuxppc-dev/2001/01/9374691/t.md

```text

Roman Zippel wrote:

> AFAIK such tricks are used for mapping normal (low) memory and ioremapped
> areas. For normal memory you can use phys_to_virt()/virt_to_phys() and for
> ioremapped memory, you have to store the physical and virtual address
> yourself. What am I missing?

The PowerPC port, except for a couple of processors (4xx and 8xx again)
could never use virt_to_phys on any dynamically allocated (vmalloc()'ed)
space.  All of the drivers/devices that used these macros were using
ioremapped() or static buffers.  Perhaps the PCI mapping functions are
implementing some of this, and I need to take a look.


	-- Dan

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```