#ifndef _PARISC_PAGE_H
#define _PARISC_PAGE_H
-/* PAGE_SHIFT determines the page size */
-#define PAGE_SHIFT 12
+#ifdef __KERNEL__
+
+#if defined(CONFIG_PARISC_PAGE_SIZE_4KB)
+# define PAGE_SHIFT 12
+#elif defined(CONFIG_PARISC_PAGE_SIZE_16KB)
+# define PAGE_SHIFT 14
+#elif defined(CONFIG_PARISC_PAGE_SIZE_64KB)
+# define PAGE_SHIFT 16
+#else
+# error "unknown default kernel page size"
+#endif
#define PAGE_SIZE (1UL << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
-#ifdef __KERNEL__
-#include <linux/config.h>
+
#ifndef __ASSEMBLY__
+#include <asm/types.h>
#include <asm/cache.h>
#define clear_page(page) memset((void *)(page), 0, PAGE_SIZE)
struct page;
-extern void purge_kernel_dcache_page(unsigned long);
-extern void copy_user_page_asm(void *to, void *from);
-extern void clear_user_page_asm(void *page, unsigned long vaddr);
-
-static inline void
-copy_user_page(void *vto, void *vfrom, unsigned long vaddr, struct page *pg)
-{
- copy_user_page_asm(vto, vfrom);
- flush_kernel_dcache_page(vto);
- /* XXX: ppc flushes icache too, should we? */
-}
-
-static inline void
-clear_user_page(void *page, unsigned long vaddr, struct page *pg)
-{
- purge_kernel_dcache_page((unsigned long)page);
- clear_user_page_asm(page, vaddr);
-}
+void copy_user_page_asm(void *to, void *from);
+void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+ struct page *pg);
+void clear_user_page(void *page, unsigned long vaddr, struct page *pg);
/*
* These are used to make use of C type-checking..
*/
-typedef struct { unsigned long pte; } pte_t;
-typedef struct { unsigned long pmd; } pmd_t;
-typedef struct { unsigned long pgd; } pgd_t;
+#define STRICT_MM_TYPECHECKS
+#ifdef STRICT_MM_TYPECHECKS
+typedef struct { unsigned long pte;
+#if !defined(CONFIG_64BIT)
+ unsigned long future_flags;
+ /* XXX: it's possible to remove future_flags and change BITS_PER_PTE_ENTRY
+ to 2, but then strangely the identical 32bit kernel boots on a
+ c3000(pa20), but not any longer on a 715(pa11).
+ Still investigating... HelgeD.
+ */
+#endif
+} pte_t; /* either 32 or 64bit */
+
+/* NOTE: even on 64 bits, these entries are __u32 because we allocate
+ * the pmd and pgd in ZONE_DMA (i.e. under 4GB) */
+typedef struct { __u32 pmd; } pmd_t;
+typedef struct { __u32 pgd; } pgd_t;
typedef struct { unsigned long pgprot; } pgprot_t;
#define pte_val(x) ((x).pte)
-#define pmd_val(x) ((x).pmd)
-#define pgd_val(x) ((x).pgd)
+/* These do not work lvalues, so make sure we don't use them as such. */
+#define pmd_val(x) ((x).pmd + 0)
+#define pgd_val(x) ((x).pgd + 0)
#define pgprot_val(x) ((x).pgprot)
#define __pte(x) ((pte_t) { (x) } )
#define __pgd(x) ((pgd_t) { (x) } )
#define __pgprot(x) ((pgprot_t) { (x) } )
-/* Pure 2^n version of get_order */
-extern __inline__ int get_order(unsigned long size)
-{
- int order;
-
- size = (size-1) >> (PAGE_SHIFT-1);
- order = -1;
- do {
- size >>= 1;
- order++;
- } while (size);
- return order;
-}
+#define __pmd_val_set(x,n) (x).pmd = (n)
+#define __pgd_val_set(x,n) (x).pgd = (n)
-#ifdef __LP64__
-#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
#else
-#define MAX_PHYSMEM_RANGES 1 /* First range is only range that fits in 32 bits */
-#endif
+/*
+ * .. while these make it easier on the compiler
+ */
+typedef unsigned long pte_t;
+typedef __u32 pmd_t;
+typedef __u32 pgd_t;
+typedef unsigned long pgprot_t;
+
+#define pte_val(x) (x)
+#define pmd_val(x) (x)
+#define pgd_val(x) (x)
+#define pgprot_val(x) (x)
+
+#define __pte(x) (x)
+#define __pmd(x) (x)
+#define __pgd(x) (x)
+#define __pgprot(x) (x)
+
+#define __pmd_val_set(x,n) (x) = (n)
+#define __pgd_val_set(x,n) (x) = (n)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
typedef struct __physmem_range {
unsigned long start_pfn;
#endif /* !__ASSEMBLY__ */
+/* WARNING: The definitions below must match exactly to sizeof(pte_t)
+ * etc
+ */
+#ifdef __LP64__
+#define BITS_PER_PTE_ENTRY 3
+#define BITS_PER_PMD_ENTRY 2
+#define BITS_PER_PGD_ENTRY 2
+#else
+#define BITS_PER_PTE_ENTRY 3
+#define BITS_PER_PMD_ENTRY 2
+#define BITS_PER_PGD_ENTRY BITS_PER_PMD_ENTRY
+#endif
+#define PGD_ENTRY_SIZE (1UL << BITS_PER_PGD_ENTRY)
+#define PMD_ENTRY_SIZE (1UL << BITS_PER_PMD_ENTRY)
+#define PTE_ENTRY_SIZE (1UL << BITS_PER_PTE_ENTRY)
+
/* to align the pointer to the (next) page boundary */
#define PAGE_ALIGN(addr) (((addr)+PAGE_SIZE-1)&PAGE_MASK)
#define LINUX_GATEWAY_SPACE 0
+
+/* This governs the relationship between virtual and physical addresses.
+ * If you alter it, make sure to take care of our various fixed mapping
+ * segments in fixmap.h */
#define __PAGE_OFFSET (0x10000000)
#define PAGE_OFFSET ((unsigned long)__PAGE_OFFSET)
+
+/* The size of the gateway page (we leave lots of room for expansion) */
+#define GATEWAY_PAGE_SIZE 0x4000
+
+/* The start of the actual kernel binary---used in vmlinux.lds.S
+ * Leave some space after __PAGE_OFFSET for detecting kernel null
+ * ptr derefs */
+#define KERNEL_BINARY_TEXT_START (__PAGE_OFFSET + 0x100000)
+
/* These macros don't work for 64-bit C code -- don't allow in C at all */
#ifdef __ASSEMBLY__
# define PA(x) ((x)-__PAGE_OFFSET)
#define __pa(x) ((unsigned long)(x)-PAGE_OFFSET)
#define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET))
-#define pfn_to_page(pfn) (mem_map + (pfn))
-#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
+#ifndef CONFIG_DISCONTIGMEM
#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#endif /* CONFIG_DISCONTIGMEM */
+
+#ifdef CONFIG_HUGETLB_PAGE
+#define HPAGE_SHIFT 22 /* 4MB (is this fixed?) */
+#define HPAGE_SIZE ((1UL) << HPAGE_SHIFT)
+#define HPAGE_MASK (~(HPAGE_SIZE - 1))
+#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
+#endif
+
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
-#ifndef CONFIG_DISCONTIGMEM
-#define virt_to_page(kaddr) (mem_map + (__pa(kaddr) >> PAGE_SHIFT))
-#define VALID_PAGE(page) ((page - mem_map) < max_mapnr)
-#endif /* !CONFIG_DISCONTIGMEM */
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
+#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+#include <asm-generic/memory_model.h>
+#include <asm-generic/page.h>
+
+#define devmem_is_allowed(x) 1
+
#endif /* __KERNEL__ */
#endif /* _PARISC_PAGE_H */
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