Linux-2.6.12-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!

1 files changed, 149 insertions, 0 deletions

diff --git a/include/asm-m68k/cacheflush.h b/include/asm-m68k/cacheflush.h
new file mode 100644
index 000000000000..e4773946f10d
--- /dev/null
+++ b/include/asm-m68k/cacheflush.h
@@ -0,0 +1,149 @@
+#ifndef _M68K_CACHEFLUSH_H
+#define _M68K_CACHEFLUSH_H
+
+#include <linux/mm.h>
+
+/*
+ * Cache handling functions
+ */
+
+#define flush_icache()						\
+({								\
+	if (CPU_IS_040_OR_060)					\
+		__asm__ __volatile__("nop\n\t"			\
+				     ".chip 68040\n\t"		\
+				     "cinva %%ic\n\t"		\
+				     ".chip 68k" : );		\
+	else {							\
+		unsigned long _tmp;				\
+		__asm__ __volatile__("movec %%cacr,%0\n\t"	\
+				     "orw %1,%0\n\t"		\
+				     "movec %0,%%cacr"		\
+				     : "=&d" (_tmp)		\
+				     : "id" (FLUSH_I));	\
+	}							\
+})
+
+/*
+ * invalidate the cache for the specified memory range.
+ * It starts at the physical address specified for
+ * the given number of bytes.
+ */
+extern void cache_clear(unsigned long paddr, int len);
+/*
+ * push any dirty cache in the specified memory range.
+ * It starts at the physical address specified for
+ * the given number of bytes.
+ */
+extern void cache_push(unsigned long paddr, int len);
+
+/*
+ * push and invalidate pages in the specified user virtual
+ * memory range.
+ */
+extern void cache_push_v(unsigned long vaddr, int len);
+
+/* cache code */
+#define FLUSH_I_AND_D	(0x00000808)
+#define FLUSH_I		(0x00000008)
+
+/* This is needed whenever the virtual mapping of the current
+   process changes.  */
+#define __flush_cache_all()					\
+({								\
+	if (CPU_IS_040_OR_060)					\
+		__asm__ __volatile__("nop\n\t"			\
+				     ".chip 68040\n\t"		\
+				     "cpusha %dc\n\t"		\
+				     ".chip 68k");		\
+	else {							\
+		unsigned long _tmp;				\
+		__asm__ __volatile__("movec %%cacr,%0\n\t"	\
+				     "orw %1,%0\n\t"		\
+				     "movec %0,%%cacr"		\
+				     : "=&d" (_tmp)		\
+				     : "di" (FLUSH_I_AND_D));	\
+	}							\
+})
+
+#define __flush_cache_030()					\
+({								\
+	if (CPU_IS_020_OR_030) {				\
+		unsigned long _tmp;				\
+		__asm__ __volatile__("movec %%cacr,%0\n\t"	\
+				     "orw %1,%0\n\t"		\
+				     "movec %0,%%cacr"		\
+				     : "=&d" (_tmp)		\
+				     : "di" (FLUSH_I_AND_D));	\
+	}							\
+})
+
+#define flush_cache_all() __flush_cache_all()
+
+#define flush_cache_vmap(start, end)		flush_cache_all()
+#define flush_cache_vunmap(start, end)		flush_cache_all()
+
+static inline void flush_cache_mm(struct mm_struct *mm)
+{
+	if (mm == current->mm)
+		__flush_cache_030();
+}
+
+/* flush_cache_range/flush_cache_page must be macros to avoid
+   a dependency on linux/mm.h, which includes this file... */
+static inline void flush_cache_range(struct vm_area_struct *vma,
+				     unsigned long start,
+				     unsigned long end)
+{
+	if (vma->vm_mm == current->mm)
+	        __flush_cache_030();
+}
+
+static inline void flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn)
+{
+	if (vma->vm_mm == current->mm)
+	        __flush_cache_030();
+}
+
+
+/* Push the page at kernel virtual address and clear the icache */
+/* RZ: use cpush %bc instead of cpush %dc, cinv %ic */
+static inline void __flush_page_to_ram(void *vaddr)
+{
+	if (CPU_IS_040_OR_060) {
+		__asm__ __volatile__("nop\n\t"
+				     ".chip 68040\n\t"
+				     "cpushp %%bc,(%0)\n\t"
+				     ".chip 68k"
+				     : : "a" (__pa(vaddr)));
+	} else {
+		unsigned long _tmp;
+		__asm__ __volatile__("movec %%cacr,%0\n\t"
+				     "orw %1,%0\n\t"
+				     "movec %0,%%cacr"
+				     : "=&d" (_tmp)
+				     : "di" (FLUSH_I));
+	}
+}
+
+#define flush_dcache_page(page)		__flush_page_to_ram(page_address(page))
+#define flush_dcache_mmap_lock(mapping)		do { } while (0)
+#define flush_dcache_mmap_unlock(mapping)	do { } while (0)
+#define flush_icache_page(vma, page)	__flush_page_to_ram(page_address(page))
+#define flush_icache_user_range(vma,pg,adr,len)	do { } while (0)
+
+#define copy_to_user_page(vma, page, vaddr, dst, src, len) \
+	do {							\
+		flush_cache_page(vma, vaddr, page_to_pfn(page));\
+		memcpy(dst, src, len);				\
+	} while (0)
+
+#define copy_from_user_page(vma, page, vaddr, dst, src, len) \
+	do {							\
+		flush_cache_page(vma, vaddr, page_to_pfn(page));\
+		memcpy(dst, src, len);				\
+	} while (0)
+
+extern void flush_icache_range(unsigned long address, unsigned long endaddr);
+
+#endif /* _M68K_CACHEFLUSH_H */