diff options
Diffstat (limited to 'include/asm-ia64/page.h')
| -rw-r--r-- | include/asm-ia64/page.h | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/include/asm-ia64/page.h b/include/asm-ia64/page.h index 08894f73abf0..9edffad8c28b 100644 --- a/include/asm-ia64/page.h +++ b/include/asm-ia64/page.h @@ -13,6 +13,19 @@ #include <asm/types.h> /* + * The top three bits of an IA64 address are its Region Number. + * Different regions are assigned to different purposes. + */ +#define RGN_SHIFT (61) +#define RGN_BASE(r) (__IA64_UL_CONST(r)<<RGN_SHIFT) +#define RGN_BITS (RGN_BASE(-1)) + +#define RGN_KERNEL 7 /* Identity mapped region */ +#define RGN_UNCACHED 6 /* Identity mapped I/O region */ +#define RGN_GATE 5 /* Gate page, Kernel text, etc */ +#define RGN_HPAGE 4 /* For Huge TLB pages */ + +/* * PAGE_SHIFT determines the actual kernel page size. */ #if defined(CONFIG_IA64_PAGE_SIZE_4KB) @@ -36,10 +49,9 @@ #define RGN_MAP_LIMIT ((1UL << (4*PAGE_SHIFT - 12)) - PAGE_SIZE) /* per region addr limit */ + #ifdef CONFIG_HUGETLB_PAGE -# define REGION_HPAGE (4UL) /* note: this is hardcoded in reload_context()!*/ -# define REGION_SHIFT 61 -# define HPAGE_REGION_BASE (REGION_HPAGE << REGION_SHIFT) +# define HPAGE_REGION_BASE RGN_BASE(RGN_HPAGE) # define HPAGE_SHIFT hpage_shift # define HPAGE_SHIFT_DEFAULT 28 /* check ia64 SDM for architecture supported size */ # define HPAGE_SIZE (__IA64_UL_CONST(1) << HPAGE_SHIFT) @@ -130,16 +142,13 @@ typedef union ia64_va { #define REGION_NUMBER(x) ({ia64_va _v; _v.l = (long) (x); _v.f.reg;}) #define REGION_OFFSET(x) ({ia64_va _v; _v.l = (long) (x); _v.f.off;}) -#define REGION_SIZE REGION_NUMBER(1) -#define REGION_KERNEL 7 - #ifdef CONFIG_HUGETLB_PAGE # define htlbpage_to_page(x) (((unsigned long) REGION_NUMBER(x) << 61) \ | (REGION_OFFSET(x) >> (HPAGE_SHIFT-PAGE_SHIFT))) # define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT) # define is_hugepage_only_range(mm, addr, len) \ - (REGION_NUMBER(addr) == REGION_HPAGE && \ - REGION_NUMBER((addr)+(len)-1) == REGION_HPAGE) + (REGION_NUMBER(addr) == RGN_HPAGE && \ + REGION_NUMBER((addr)+(len)-1) == RGN_HPAGE) extern unsigned int hpage_shift; #endif @@ -197,7 +206,7 @@ get_order (unsigned long size) # define __pgprot(x) (x) #endif /* !STRICT_MM_TYPECHECKS */ -#define PAGE_OFFSET __IA64_UL_CONST(0xe000000000000000) +#define PAGE_OFFSET RGN_BASE(RGN_KERNEL) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC | \ |