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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/cacheflush.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/cacheflush.h')
-rw-r--r--include/asm-mips/cacheflush.h81
1 files changed, 81 insertions, 0 deletions
diff --git a/include/asm-mips/cacheflush.h b/include/asm-mips/cacheflush.h
new file mode 100644
index 00000000000..635f1bfb403
--- /dev/null
+++ b/include/asm-mips/cacheflush.h
@@ -0,0 +1,81 @@
+/*
+ * 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, 95, 96, 97, 98, 99, 2000, 01, 02, 03 by Ralf Baechle
+ * Copyright (C) 1999, 2000, 2001 Silicon Graphics, Inc.
+ */
+#ifndef _ASM_CACHEFLUSH_H
+#define _ASM_CACHEFLUSH_H
+
+/* Keep includes the same across arches. */
+#include <linux/mm.h>
+#include <asm/cpu-features.h>
+
+/* Cache flushing:
+ *
+ * - flush_cache_all() flushes entire cache
+ * - flush_cache_mm(mm) flushes the specified mm context's cache lines
+ * - flush_cache_page(mm, vmaddr, pfn) flushes a single page
+ * - flush_cache_range(vma, start, end) flushes a range of pages
+ * - flush_icache_range(start, end) flush a range of instructions
+ * - flush_dcache_page(pg) flushes(wback&invalidates) a page for dcache
+ * - flush_icache_page(vma, pg) flushes(invalidates) a page for icache
+ *
+ * MIPS specific flush operations:
+ *
+ * - flush_cache_sigtramp() flush signal trampoline
+ * - flush_icache_all() flush the entire instruction cache
+ * - flush_data_cache_page() flushes a page from the data cache
+ */
+extern void (*flush_cache_all)(void);
+extern void (*__flush_cache_all)(void);
+extern void (*flush_cache_mm)(struct mm_struct *mm);
+extern void (*flush_cache_range)(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end);
+extern void (*flush_cache_page)(struct vm_area_struct *vma, unsigned long page, unsigned long pfn);
+extern void __flush_dcache_page(struct page *page);
+
+static inline void flush_dcache_page(struct page *page)
+{
+ if (cpu_has_dc_aliases)
+ __flush_dcache_page(page);
+
+}
+
+#define flush_dcache_mmap_lock(mapping) do { } while (0)
+#define flush_dcache_mmap_unlock(mapping) do { } while (0)
+
+extern void (*flush_icache_page)(struct vm_area_struct *vma,
+ struct page *page);
+extern void (*flush_icache_range)(unsigned long start, unsigned long end);
+#define flush_cache_vmap(start, end) flush_cache_all()
+#define flush_cache_vunmap(start, end) flush_cache_all()
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+do { \
+ memcpy(dst, (void *) src, len); \
+ flush_icache_page(vma, page); \
+} while (0)
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+ memcpy(dst, src, len)
+
+extern void (*flush_cache_sigtramp)(unsigned long addr);
+extern void (*flush_icache_all)(void);
+extern void (*flush_data_cache_page)(unsigned long addr);
+
+/*
+ * This flag is used to indicate that the page pointed to by a pte
+ * is dirty and requires cleaning before returning it to the user.
+ */
+#define PG_dcache_dirty PG_arch_1
+
+#define Page_dcache_dirty(page) \
+ test_bit(PG_dcache_dirty, &(page)->flags)
+#define SetPageDcacheDirty(page) \
+ set_bit(PG_dcache_dirty, &(page)->flags)
+#define ClearPageDcacheDirty(page) \
+ clear_bit(PG_dcache_dirty, &(page)->flags)
+
+#endif /* _ASM_CACHEFLUSH_H */