#ifndef _ASMARM_PGTABLE_H
#define _ASMARM_PGTABLE_H
+#include <asm-generic/4level-fixup.h>
+
#include <asm/memory.h>
#include <asm/proc-fns.h>
#include <asm/arch/vmalloc.h>
+/*
+ * Just any arbitrary offset to the start of the vmalloc VM area: the
+ * current 8MB value just means that there will be a 8MB "hole" after the
+ * physical memory until the kernel virtual memory starts. That means that
+ * any out-of-bounds memory accesses will hopefully be caught.
+ * The vmalloc() routines leaves a hole of 4kB between each vmalloced
+ * area for the same reason. ;)
+ *
+ * Note that platforms may override VMALLOC_START, but they must provide
+ * VMALLOC_END. VMALLOC_END defines the (exclusive) limit of this space,
+ * which may not overlap IO space.
+ */
+#ifndef VMALLOC_START
+#define VMALLOC_OFFSET (8*1024*1024)
+#define VMALLOC_START (((unsigned long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1))
+#endif
+
/*
* Hardware-wise, we have a two level page table structure, where the first
* level has 4096 entries, and the second level has 256 entries. Each entry
* PMD_SHIFT determines the size of the area a second-level page table can map
* PGDIR_SHIFT determines what a third-level page table entry can map
*/
-#define PMD_SHIFT 20
+#define PMD_SHIFT 21
#define PGDIR_SHIFT 21
#define LIBRARY_TEXT_START 0x0c000000
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
+/*
+ * This is the lowest virtual address we can permit any user space
+ * mapping to be mapped at. This is particularly important for
+ * non-high vector CPUs.
+ */
+#define FIRST_USER_ADDRESS PAGE_SIZE
+
#define FIRST_USER_PGD_NR 1
#define USER_PTRS_PER_PGD ((TASK_SIZE/PGDIR_SIZE) - FIRST_USER_PGD_NR)
+/*
+ * ARMv6 supersection address mask and size definitions.
+ */
+#define SUPERSECTION_SHIFT 24
+#define SUPERSECTION_SIZE (1UL << SUPERSECTION_SHIFT)
+#define SUPERSECTION_MASK (~(SUPERSECTION_SIZE-1))
+
/*
* Hardware page table definitions.
*
#define PMD_SECT_APX (1 << 15) /* v6 */
#define PMD_SECT_S (1 << 16) /* v6 */
#define PMD_SECT_nG (1 << 17) /* v6 */
+#define PMD_SECT_SUPER (1 << 18) /* v6 */
#define PMD_SECT_UNCACHED (0)
#define PMD_SECT_BUFFERED (PMD_SECT_BUFFERABLE)
#define PMD_SECT_WB (PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
#define PMD_SECT_MINICACHE (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE)
#define PMD_SECT_WBWA (PMD_SECT_TEX(1) | PMD_SECT_CACHEABLE | PMD_SECT_BUFFERABLE)
+#define PMD_SECT_NONSHARED_DEV (PMD_SECT_TEX(2))
/*
* - coarse table (not used)
/*
* - extended small page/tiny page
*/
+#define PTE_EXT_XN (1 << 0) /* v6 */
#define PTE_EXT_AP_MASK (3 << 4)
+#define PTE_EXT_AP0 (1 << 4)
+#define PTE_EXT_AP1 (2 << 4)
#define PTE_EXT_AP_UNO_SRO (0 << 4)
-#define PTE_EXT_AP_UNO_SRW (1 << 4)
-#define PTE_EXT_AP_URO_SRW (2 << 4)
-#define PTE_EXT_AP_URW_SRW (3 << 4)
+#define PTE_EXT_AP_UNO_SRW (PTE_EXT_AP0)
+#define PTE_EXT_AP_URO_SRW (PTE_EXT_AP1)
+#define PTE_EXT_AP_URW_SRW (PTE_EXT_AP1|PTE_EXT_AP0)
#define PTE_EXT_TEX(x) ((x) << 6) /* v5 */
+#define PTE_EXT_APX (1 << 9) /* v6 */
+#define PTE_EXT_SHARED (1 << 10) /* v6 */
+#define PTE_EXT_NG (1 << 11) /* v6 */
/*
* - small page
#define L_PTE_WRITE (1 << 5)
#define L_PTE_EXEC (1 << 6)
#define L_PTE_DIRTY (1 << 7)
+#define L_PTE_SHARED (1 << 10) /* shared between CPUs (v6) */
+#define L_PTE_ASID (1 << 11) /* non-global (use ASID, v6) */
#ifndef __ASSEMBLY__
#define pfn_pte(pfn,prot) (__pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot)))
#define pte_none(pte) (!pte_val(pte))
-#define pte_clear(ptep) set_pte((ptep), __pte(0))
+#define pte_clear(mm,addr,ptep) set_pte_at((mm),(addr),(ptep), __pte(0))
#define pte_page(pte) (pfn_to_page(pte_pfn(pte)))
#define pte_offset_kernel(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr))
#define pte_offset_map(dir,addr) (pmd_page_kernel(*(dir)) + __pte_index(addr))
#define pte_unmap_nested(pte) do { } while (0)
#define set_pte(ptep, pte) cpu_set_pte(ptep,pte)
+#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
/*
* The following only work if pte_present() is true.
#define pmd_present(pmd) (pmd_val(pmd))
#define pmd_bad(pmd) (pmd_val(pmd) & 2)
-#define set_pmd(pmdp,pmd) \
+#define copy_pmd(pmdpd,pmdps) \
do { \
- *pmdp = pmd; \
- flush_pmd_entry(pmdp); \
+ pmdpd[0] = pmdps[0]; \
+ pmdpd[1] = pmdps[1]; \
+ flush_pmd_entry(pmdpd); \
} while (0)
#define pmd_clear(pmdp) \
#define pgd_clear(pgdp) do { } while (0)
#define set_pgd(pgd,pgdp) do { } while (0)
-#define page_pte_prot(page,prot) mk_pte(page, prot)
-#define page_pte(page) mk_pte(page, __pgprot(0))
-
/* to find an entry in a page-table-directory */
#define pgd_index(addr) ((addr) >> PGDIR_SHIFT)
#define HAVE_ARCH_UNMAPPED_AREA
/*
- * remap a physical address `phys' of size `size' with page protection `prot'
+ * remap a physical page `pfn' of size `size' with page protection `prot'
* into virtual address `from'
*/
-#define io_remap_page_range(vma,from,phys,size,prot) \
- remap_page_range(vma,from,phys,size,prot)
+#define io_remap_pfn_range(vma,from,pfn,size,prot) \
+ remap_pfn_range(vma, from, pfn, size, prot)
+
+#define MK_IOSPACE_PFN(space, pfn) (pfn)
+#define GET_IOSPACE(pfn) 0
+#define GET_PFN(pfn) (pfn)
#define pgtable_cache_init() do { } while (0)