Hi Sam, On Sat, Dec 31, 2011 at 01:16, Sam Ravnborg <sam@xxxxxxxxxxxx> wrote: > On Fri, Dec 30, 2011 at 03:10:33PM +0100, Sam Ravnborg wrote: >> On Fri, Dec 30, 2011 at 11:44:28PM +1100, Julian Calaby wrote: >> > Sam, >> > >> > I understand if this isn't used at all, but this seems to be Sun4C >> > stuff, so why isn't it used - are these defines defined elsewhere? >> >> The SUN4C stuff is defined in arch/sparc/include/asm/pgtsun4c.h > > The diff between pgtsun.h and pgtsun4c.h is very small. > The relevant part of the diff is below: > > @@ -9,10 +10,10 @@ > #include <asm/contregs.h> > > /* PMD_SHIFT determines the size of the area a second-level page table can map */ > -#define SUN4C_PMD_SHIFT 22 > +#define SUN4C_PMD_SHIFT 23 > > /* PGDIR_SHIFT determines what a third-level page table entry can map */ > -#define SUN4C_PGDIR_SHIFT 22 > +#define SUN4C_PGDIR_SHIFT 23 > #define SUN4C_PGDIR_SIZE (1UL << SUN4C_PGDIR_SHIFT) > #define SUN4C_PGDIR_MASK (~(SUN4C_PGDIR_SIZE-1)) > #define SUN4C_PGDIR_ALIGN(addr) (((addr)+SUN4C_PGDIR_SIZE-1)&SUN4C_PGDIR_MASK) > @@ -23,9 +24,9 @@ > #define SUN4C_REAL_PGDIR_MASK (~(SUN4C_REAL_PGDIR_SIZE-1)) > #define SUN4C_REAL_PGDIR_ALIGN(addr) (((addr)+SUN4C_REAL_PGDIR_SIZE-1)&SUN4C_REAL_PGDIR_MASK) > > -/* 16 bit PFN on sun4c */ > -#define SUN4C_PFN_MASK 0xffff > - > +/* 19 bit PFN on sun4 */ > +#define SUN4C_PFN_MASK 0x7ffff > + > /* Don't increase these unless the structures in sun4c.c are fixed */ > #define SUN4C_MAX_SEGMAPS 256 > #define SUN4C_MAX_CONTEXTS 16 > > > I stripped aways the parts which was in comments and white-space only. Ok, that makes sense then. Thanks! -- Julian Calaby Email: julian.calaby@xxxxxxxxx Profile: http://www.google.com/profiles/julian.calaby/ .Plan: http://sites.google.com/site/juliancalaby/ -- To unsubscribe from this list: send the line "unsubscribe sparclinux" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
