Hi Ralf, I am sorry if it is not clear from my last mail. What I want to convey is, "See MIPS Run" explains "window on physical memory (cached)" will start @ 0x9000_0000_0000_0000. You can see "See MIPS Run" page under suspect from this link http://books.google.co.in/books?id=kk8G2gK4Tw8C&lpg=PP1&dq=see%20mips%20 run&pg=PA51#v=onepage&q=&f=false How ever as you mentioned Linux source defines CAC_BASE 0x98000000_00000000 Thanks Anoop > -----Original Message----- > From: Ralf Baechle [mailto:ralf@xxxxxxxxxxxxxx] > Sent: Wednesday, February 03, 2010 6:04 PM > To: Anoop P.A. > Cc: linux-mips@xxxxxxxxxxxxxx > Subject: Re: Cached Base address difference. > > On Wed, Feb 03, 2010 at 03:34:25AM -0800, Anoop P.A. wrote: > > > I am seeing a address conflict in asm-generic/spaces.h . in spaces.h ( > > 64 bit)CAC_BASE has been defined as 0x9800000000000000 however see mips > > run says it is 0x9000000000000000 > > http://books.google.co.in/books?id=kk8G2gK4Tw8C&lpg=PP1&dq=see%20mips%20 > > run&pg=PA51#v=onepage&q=&f=false > > > > Is this intentional? > > <asm/mach-generic/spaces.h> defines: > > #ifndef CAC_BASE > #ifdef CONFIG_DMA_NONCOHERENT > #define CAC_BASE _AC(0x9800000000000000, UL) > #else > #define CAC_BASE _AC(0xa800000000000000, UL) > #endif > #endif > > No 0x9000000000000000 anywhere - and it would be wrong because it stands > for uncached. > > Ralf
