From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 5 Jun 2001 15:59:38 -0500 From: Timur Tabi In-Reply-To: <3B581215@MailAndNews.com> Subject: Re: temp. mem mappings Message-ID: Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org List-ID: ** Reply to message from cohutta on Tue, 5 Jun 2001 16:42:52 -0400 > I don't really want to play with the page tables if i can help it. > I didn't use ioremap() because it's real system memory, not IO bus > memory. > > How much normal memory is identity-mapped at boot on x86? > Is it more than 8 MB? Much more. Somewhere between 2 and 4 GB is mapped. Large memory support in Linux has always confused me, so I can't remember exactly how much is mapped. Keep in mind that if you want to access that memory as uncached or write-combined, you'll need to use the method I described. -- Timur Tabi - ttabi@interactivesi.com Interactive Silicon - http://www.interactivesi.com -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/