summaryrefslogtreecommitdiffstats
path: root/include/asm-mips/page.h
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-mips/page.h
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-mips/page.h')
-rw-r--r--include/asm-mips/page.h151
1 files changed, 151 insertions, 0 deletions
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
new file mode 100644
index 00000000000..d1bf8240e73
--- /dev/null
+++ b/include/asm-mips/page.h
@@ -0,0 +1,151 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1994 - 1999, 2000, 03 Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_PAGE_H
+#define _ASM_PAGE_H
+
+#include <linux/config.h>
+
+#ifdef __KERNEL__
+
+#include <spaces.h>
+
+#endif
+
+/*
+ * PAGE_SHIFT determines the page size
+ */
+#ifdef CONFIG_PAGE_SIZE_4KB
+#define PAGE_SHIFT 12
+#endif
+#ifdef CONFIG_PAGE_SIZE_8KB
+#define PAGE_SHIFT 13
+#endif
+#ifdef CONFIG_PAGE_SIZE_16KB
+#define PAGE_SHIFT 14
+#endif
+#ifdef CONFIG_PAGE_SIZE_64KB
+#define PAGE_SHIFT 16
+#endif
+#define PAGE_SIZE (1UL << PAGE_SHIFT)
+#define PAGE_MASK (~((1 << PAGE_SHIFT) - 1))
+
+
+#ifdef __KERNEL__
+#ifndef __ASSEMBLY__
+
+extern void clear_page(void * page);
+extern void copy_page(void * to, void * from);
+
+extern unsigned long shm_align_mask;
+
+static inline unsigned long pages_do_alias(unsigned long addr1,
+ unsigned long addr2)
+{
+ return (addr1 ^ addr2) & shm_align_mask;
+}
+
+struct page;
+
+static inline void clear_user_page(void *addr, unsigned long vaddr,
+ struct page *page)
+{
+ extern void (*flush_data_cache_page)(unsigned long addr);
+
+ clear_page(addr);
+ if (pages_do_alias((unsigned long) addr, vaddr))
+ flush_data_cache_page((unsigned long)addr);
+}
+
+static inline void copy_user_page(void *vto, void *vfrom, unsigned long vaddr,
+ struct page *to)
+{
+ extern void (*flush_data_cache_page)(unsigned long addr);
+
+ copy_page(vto, vfrom);
+ if (pages_do_alias((unsigned long)vto, vaddr))
+ flush_data_cache_page((unsigned long)vto);
+}
+
+/*
+ * These are used to make use of C type-checking..
+ */
+#ifdef CONFIG_64BIT_PHYS_ADDR
+ #ifdef CONFIG_CPU_MIPS32
+ typedef struct { unsigned long pte_low, pte_high; } pte_t;
+ #define pte_val(x) ((x).pte_low | ((unsigned long long)(x).pte_high << 32))
+ #else
+ typedef struct { unsigned long long pte; } pte_t;
+ #define pte_val(x) ((x).pte)
+ #endif
+#else
+typedef struct { unsigned long pte; } pte_t;
+#define pte_val(x) ((x).pte)
+#endif
+
+typedef struct { unsigned long pmd; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pmd_val(x) ((x).pmd)
+#define pgd_val(x) ((x).pgd)
+#define pgprot_val(x) ((x).pgprot)
+
+#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
+
+#define __pte(x) ((pte_t) { (x) } )
+#define __pmd(x) ((pmd_t) { (x) } )
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x) ((pgprot_t) { (x) } )
+
+/* Pure 2^n version of get_order */
+static __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;
+}
+
+#endif /* !__ASSEMBLY__ */
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr) (((addr) + PAGE_SIZE - 1) & PAGE_MASK)
+
+#define __pa(x) ((unsigned long) (x) - PAGE_OFFSET)
+#define __va(x) ((void *)((unsigned long) (x) + PAGE_OFFSET))
+
+#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
+
+#ifndef CONFIG_DISCONTIGMEM
+#define pfn_to_page(pfn) (mem_map + (pfn))
+#define page_to_pfn(page) ((unsigned long)((page) - mem_map))
+#define pfn_valid(pfn) ((pfn) < max_mapnr)
+#endif
+
+#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
+
+#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
+ VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#define UNCAC_ADDR(addr) ((addr) - PAGE_OFFSET + UNCAC_BASE)
+#define CAC_ADDR(addr) ((addr) - UNCAC_BASE + PAGE_OFFSET)
+
+#endif /* defined (__KERNEL__) */
+
+#ifdef CONFIG_LIMITED_DMA
+#define WANT_PAGE_VIRTUAL
+#endif
+
+#endif /* _ASM_PAGE_H */