Some thoughts on your ISA ideas:
Geert Uytterhoeven wrote:
> On most other machines (ARM, MIPS, PPC), ISA memory
> space is located somewhere else in PCI memory space.
- What qualifies a 16 MB region to be called ISA space?
- Can there only be 1 of these regions? 4 GB could hold 256 spaces a 16
> However, there are still some problems left:
> 1. How to allocate ISA memory space?
> Some drivers do
> request_mem_region(0xA0000, 65535, ...)
If start is a long int it it could easyly be 0x7F0A0000 or 0xFE0A0000.
> What do you think?
Perhaps an additional (enum) Parameter to select the ISA space?
Or an additional function to globally select a 16 MB range as THE ISA
What would it be like to access ISA IO space on archs which have mmapped
Some even have ISA IO inside 64K of _each_ ISA MEM space.
-- Bernd Harries
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