#include <linux/sched.h>
-/* Certain architectures need to do special things when pte's
- * within a page table are directly modified. Thus, the following
- * hook is made available.
- */
-#define set_pte(pteptr, pteval) ((*(pteptr)) = (pteval))
-
/* Entries per page directory level. */
#define PTRS_PER_PTE (1UL << (PAGE_SHIFT-3))
* is different so we can optimize correctly for 32-bit tasks.
*/
#define REAL_PTRS_PER_PMD (1UL << PMD_BITS)
-#define PTRS_PER_PMD ((const int)(test_thread_flag(TIF_32BIT) ? \
- (1UL << (32 - (PAGE_SHIFT-3) - PAGE_SHIFT)) : \
- (REAL_PTRS_PER_PMD)))
+
+/* This is gross, but unless we do this gcc retests the
+ * thread flag every interation in pmd traversal loops.
+ */
+extern unsigned long __ptrs_per_pmd(void) __attribute_const__;
+#define PTRS_PER_PMD __ptrs_per_pmd()
/*
* We cannot use the top address range because VPTE table lives there. This
#endif /* !(__ASSEMBLY__) */
/* Spitfire/Cheetah TTE bits. */
-#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
-#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit up to date */
-#define _PAGE_SZ4MB _AC(0x6000000000000000,UL) /* 4MB Page */
-#define _PAGE_SZ512K _AC(0x4000000000000000,UL) /* 512K Page */
-#define _PAGE_SZ64K _AC(0x2000000000000000,UL) /* 64K Page */
-#define _PAGE_SZ8K _AC(0x0000000000000000,UL) /* 8K Page */
-#define _PAGE_NFO _AC(0x1000000000000000,UL) /* No Fault Only */
-#define _PAGE_IE _AC(0x0800000000000000,UL) /* Invert Endianness */
-#define _PAGE_SN _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
-#define _PAGE_PADDR_SF _AC(0x000001FFFFFFE000,UL) /* (Spitfire) paddr [40:13]*/
-#define _PAGE_PADDR _AC(0x000007FFFFFFE000,UL) /* (Cheetah) paddr [42:13] */
-#define _PAGE_SOFT _AC(0x0000000000001F80,UL) /* Software bits */
-#define _PAGE_L _AC(0x0000000000000040,UL) /* Locked TTE */
-#define _PAGE_CP _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
-#define _PAGE_CV _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
-#define _PAGE_E _AC(0x0000000000000008,UL) /* side-Effect */
-#define _PAGE_P _AC(0x0000000000000004,UL) /* Privileged Page */
-#define _PAGE_W _AC(0x0000000000000002,UL) /* Writable */
-#define _PAGE_G _AC(0x0000000000000001,UL) /* Global */
-
-/* Here are the SpitFire software bits we use in the TTE's. */
-#define _PAGE_FILE _AC(0x0000000000001000,UL) /* Pagecache page */
-#define _PAGE_MODIFIED _AC(0x0000000000000800,UL) /* Modified (dirty) */
-#define _PAGE_ACCESSED _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
-#define _PAGE_READ _AC(0x0000000000000200,UL) /* Readable SW Bit */
-#define _PAGE_WRITE _AC(0x0000000000000100,UL) /* Writable SW Bit */
-#define _PAGE_PRESENT _AC(0x0000000000000080,UL) /* Present */
+#define _PAGE_VALID _AC(0x8000000000000000,UL) /* Valid TTE */
+#define _PAGE_R _AC(0x8000000000000000,UL) /* Keep ref bit up to date*/
+#define _PAGE_SZ4MB _AC(0x6000000000000000,UL) /* 4MB Page */
+#define _PAGE_SZ512K _AC(0x4000000000000000,UL) /* 512K Page */
+#define _PAGE_SZ64K _AC(0x2000000000000000,UL) /* 64K Page */
+#define _PAGE_SZ8K _AC(0x0000000000000000,UL) /* 8K Page */
+#define _PAGE_NFO _AC(0x1000000000000000,UL) /* No Fault Only */
+#define _PAGE_IE _AC(0x0800000000000000,UL) /* Invert Endianness */
+#define _PAGE_SOFT2 _AC(0x07FC000000000000,UL) /* Software bits, set 2 */
+#define _PAGE_RES1 _AC(0x0003000000000000,UL) /* Reserved */
+#define _PAGE_SN _AC(0x0000800000000000,UL) /* (Cheetah) Snoop */
+#define _PAGE_RES2 _AC(0x0000780000000000,UL) /* Reserved */
+#define _PAGE_PADDR_SF _AC(0x000001FFFFFFE000,UL) /* (Spitfire) paddr[40:13]*/
+#define _PAGE_PADDR _AC(0x000007FFFFFFE000,UL) /* (Cheetah) paddr[42:13] */
+#define _PAGE_SOFT _AC(0x0000000000001F80,UL) /* Software bits */
+#define _PAGE_L _AC(0x0000000000000040,UL) /* Locked TTE */
+#define _PAGE_CP _AC(0x0000000000000020,UL) /* Cacheable in P-Cache */
+#define _PAGE_CV _AC(0x0000000000000010,UL) /* Cacheable in V-Cache */
+#define _PAGE_E _AC(0x0000000000000008,UL) /* side-Effect */
+#define _PAGE_P _AC(0x0000000000000004,UL) /* Privileged Page */
+#define _PAGE_W _AC(0x0000000000000002,UL) /* Writable */
+#define _PAGE_G _AC(0x0000000000000001,UL) /* Global */
+
+/* Here are the SpitFire software bits we use in the TTE's.
+ *
+ * WARNING: If you are going to try and start using some
+ * of the soft2 bits, you will need to make
+ * modifications to the swap entry implementation.
+ * For example, one thing that could happen is that
+ * swp_entry_to_pte() would BUG_ON() if you tried
+ * to use one of the soft2 bits for _PAGE_FILE.
+ *
+ * Like other architectures, I have aliased _PAGE_FILE with
+ * _PAGE_MODIFIED. This works because _PAGE_FILE is never
+ * interpreted that way unless _PAGE_PRESENT is clear.
+ */
+#define _PAGE_EXEC _AC(0x0000000000001000,UL) /* Executable SW bit */
+#define _PAGE_MODIFIED _AC(0x0000000000000800,UL) /* Modified (dirty) */
+#define _PAGE_FILE _AC(0x0000000000000800,UL) /* Pagecache page */
+#define _PAGE_ACCESSED _AC(0x0000000000000400,UL) /* Accessed (ref'd) */
+#define _PAGE_READ _AC(0x0000000000000200,UL) /* Readable SW Bit */
+#define _PAGE_WRITE _AC(0x0000000000000100,UL) /* Writable SW Bit */
+#define _PAGE_PRESENT _AC(0x0000000000000080,UL) /* Present */
#if PAGE_SHIFT == 13
#define _PAGE_SZBITS _PAGE_SZ8K
/* Don't set the TTE _PAGE_W bit here, else the dirty bit never gets set. */
#define PAGE_SHARED __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
- __ACCESS_BITS | _PAGE_WRITE)
+ __ACCESS_BITS | _PAGE_WRITE | _PAGE_EXEC)
#define PAGE_COPY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
- __ACCESS_BITS)
+ __ACCESS_BITS | _PAGE_EXEC)
#define PAGE_READONLY __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
- __ACCESS_BITS)
+ __ACCESS_BITS | _PAGE_EXEC)
#define PAGE_KERNEL __pgprot (_PAGE_PRESENT | _PAGE_VALID | _PAGE_CACHE | \
- __PRIV_BITS | __ACCESS_BITS | __DIRTY_BITS)
+ __PRIV_BITS | \
+ __ACCESS_BITS | __DIRTY_BITS | _PAGE_EXEC)
+
+#define PAGE_SHARED_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \
+ _PAGE_CACHE | \
+ __ACCESS_BITS | _PAGE_WRITE)
+
+#define PAGE_COPY_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \
+ _PAGE_CACHE | __ACCESS_BITS)
+
+#define PAGE_READONLY_NOEXEC __pgprot (_PAGE_PRESENT | _PAGE_VALID | \
+ _PAGE_CACHE | __ACCESS_BITS)
#define _PFN_MASK _PAGE_PADDR
__ACCESS_BITS | _PAGE_E)
#define __P000 PAGE_NONE
-#define __P001 PAGE_READONLY
-#define __P010 PAGE_COPY
-#define __P011 PAGE_COPY
+#define __P001 PAGE_READONLY_NOEXEC
+#define __P010 PAGE_COPY_NOEXEC
+#define __P011 PAGE_COPY_NOEXEC
#define __P100 PAGE_READONLY
#define __P101 PAGE_READONLY
#define __P110 PAGE_COPY
#define __P111 PAGE_COPY
#define __S000 PAGE_NONE
-#define __S001 PAGE_READONLY
-#define __S010 PAGE_SHARED
-#define __S011 PAGE_SHARED
+#define __S001 PAGE_READONLY_NOEXEC
+#define __S010 PAGE_SHARED_NOEXEC
+#define __S011 PAGE_SHARED_NOEXEC
#define __S100 PAGE_READONLY
#define __S101 PAGE_READONLY
#define __S110 PAGE_SHARED
((unsigned long) __va((((unsigned long)pgd_val(pgd))<<11UL)))
#define pte_none(pte) (!pte_val(pte))
#define pte_present(pte) (pte_val(pte) & _PAGE_PRESENT)
-#define pte_clear(pte) (pte_val(*(pte)) = 0UL)
#define pmd_none(pmd) (!pmd_val(pmd))
#define pmd_bad(pmd) (0)
#define pmd_present(pmd) (pmd_val(pmd) != 0U)
* Undefined behaviour if not..
*/
#define pte_read(pte) (pte_val(pte) & _PAGE_READ)
-#define pte_exec(pte) pte_read(pte)
+#define pte_exec(pte) (pte_val(pte) & _PAGE_EXEC)
#define pte_write(pte) (pte_val(pte) & _PAGE_WRITE)
#define pte_dirty(pte) (pte_val(pte) & _PAGE_MODIFIED)
#define pte_young(pte) (pte_val(pte) & _PAGE_ACCESSED)
#define pte_unmap(pte) do { } while (0)
#define pte_unmap_nested(pte) do { } while (0)
+/* Actual page table PTE updates. */
+extern void tlb_batch_add(pte_t *ptep, pte_t orig);
+
+static inline void set_pte(pte_t *ptep, pte_t pte)
+{
+ pte_t orig = *ptep;
+
+ *ptep = pte;
+ if (pte_present(orig))
+ tlb_batch_add(ptep, orig);
+}
+
+#define pte_clear(ptep) set_pte((ptep), __pte(0UL))
+
extern pgd_t swapper_pg_dir[1];
/* These do nothing with the way I have things setup. */
if (addr >= PAGE_OFFSET)
return addr & _PAGE_PADDR;
if ((addr >= LOW_OBP_ADDRESS) && (addr < HI_OBP_ADDRESS))
- return prom_virt_to_phys(addr, 0);
+ return prom_virt_to_phys(addr, NULL);
pgdp = pgd_offset_k(addr);
pmdp = pmd_offset(pgdp, addr);
ptep = pte_offset_kernel(pmdp, addr);
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