Messages in this thread | | | Date | Thu, 21 Oct 1999 09:23:36 +0200 (CEST) | From | Ingo Molnar <> | Subject | Re: [PATCH] 2.3.23pre4 - DMA fix, boot failure on ABIT BP6 andpage_alloc.c improvements |
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On Thu, 21 Oct 1999, Jeff Garzik wrote:
> Does the following imply that handling of ISA memory space will now be > different across architectures? ie. don't ioremap ISA space on x86, but > do ioremap it on Alpha?
you can ioremap ISA space on x86 as well. But there is old code that still relies on readb/writeb(low_address) mapping to ISA space memory access. 2.3.23-pre simply goes the first step making all such read[bwl]/write[bwl] access illegal (by printing a warning) - then we can make io_virt an identity mapping.
-- mingo
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