| To: | Teresa Tao <Teresat@tridentmicro.com> |
|---|---|
| Subject: | Re: mmap'ed memory cacheable or uncheable |
| From: | Ralf Baechle <ralf@linux-mips.org> |
| Date: | Thu, 31 Jul 2003 13:31:21 +0200 |
| Cc: | linux-mips@linux-mips.org |
| In-reply-to: | <61F6477DE6BED311B69F009027C3F58403AA3969@EXCHANGE> |
| Original-recipient: | rfc822;linux-mips@linux-mips.org |
| References: | <61F6477DE6BED311B69F009027C3F58403AA3969@EXCHANGE> |
| Sender: | linux-mips-bounce@linux-mips.org |
| User-agent: | Mutt/1.4.1i |
On Thu, Jul 24, 2003 at 08:26:59PM -0700, Teresa Tao wrote: > I got a question regarding the mmap'ed memory. Is the mmap'ed memory > cacheable or uncheable? My driver just use the remap_page_range to map > a reserved physical memory. Mmap(2) creates cachable mappings for everything below the highest memory address and uncached above that. That's a somewhat naive mechanism which fails a few systems but somehow nobody did complain so far ... Ralf |
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