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, 195 insertions, 0 deletions

diff --git a/include/asm-m68k/page.h b/include/asm-m68k/page.h
new file mode 100644
index 000000000000..99a516709210
--- /dev/null
+++ b/include/asm-m68k/page.h
@@ -0,0 +1,195 @@
+#ifndef _M68K_PAGE_H
+#define _M68K_PAGE_H
+
+#include <linux/config.h>
+
+/* PAGE_SHIFT determines the page size */
+#ifndef CONFIG_SUN3
+#define PAGE_SHIFT	(12)
+#else
+#define PAGE_SHIFT	(13)
+#endif
+#ifdef __ASSEMBLY__
+#define PAGE_SIZE	(1 << PAGE_SHIFT)
+#else
+#define PAGE_SIZE	(1UL << PAGE_SHIFT)
+#endif
+#define PAGE_MASK	(~(PAGE_SIZE-1))
+
+#ifdef __KERNEL__
+
+#include <asm/setup.h>
+
+#if PAGE_SHIFT < 13
+#define THREAD_SIZE (8192)
+#else
+#define THREAD_SIZE PAGE_SIZE
+#endif
+
+#ifndef __ASSEMBLY__
+
+#define get_user_page(vaddr)		__get_free_page(GFP_KERNEL)
+#define free_user_page(page, addr)	free_page(addr)
+
+/*
+ * We don't need to check for alignment etc.
+ */
+#ifdef CPU_M68040_OR_M68060_ONLY
+static inline void copy_page(void *to, void *from)
+{
+  unsigned long tmp;
+
+  __asm__ __volatile__("1:\t"
+		       ".chip 68040\n\t"
+		       "move16 %1@+,%0@+\n\t"
+		       "move16 %1@+,%0@+\n\t"
+		       ".chip 68k\n\t"
+		       "dbra  %2,1b\n\t"
+		       : "=a" (to), "=a" (from), "=d" (tmp)
+		       : "0" (to), "1" (from) , "2" (PAGE_SIZE / 32 - 1)
+		       );
+}
+
+static inline void clear_page(void *page)
+{
+	unsigned long tmp;
+	unsigned long *sp = page;
+
+	*sp++ = 0;
+	*sp++ = 0;
+	*sp++ = 0;
+	*sp++ = 0;
+
+	__asm__ __volatile__("1:\t"
+			     ".chip 68040\n\t"
+			     "move16 %2@+,%0@+\n\t"
+			     ".chip 68k\n\t"
+			     "subqw  #8,%2\n\t"
+			     "subqw  #8,%2\n\t"
+			     "dbra   %1,1b\n\t"
+			     : "=a" (sp), "=d" (tmp)
+			     : "a" (page), "0" (sp),
+			       "1" ((PAGE_SIZE - 16) / 16 - 1));
+}
+
+#else
+#define clear_page(page)	memset((page), 0, PAGE_SIZE)
+#define copy_page(to,from)	memcpy((to), (from), PAGE_SIZE)
+#endif
+
+#define clear_user_page(addr, vaddr, page)	\
+	do {	clear_page(addr);		\
+		flush_dcache_page(page);	\
+	} while (0)
+#define copy_user_page(to, from, vaddr, page)	\
+	do {	copy_page(to, from);		\
+		flush_dcache_page(page);	\
+	} while (0)
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { unsigned long pte; } pte_t;
+typedef struct { unsigned long pmd[16]; } pmd_t;
+typedef struct { unsigned long pgd; } pgd_t;
+typedef struct { unsigned long pgprot; } pgprot_t;
+
+#define pte_val(x)	((x).pte)
+#define pmd_val(x)	((&x)->pmd[0])
+#define pgd_val(x)	((x).pgd)
+#define pgprot_val(x)	((x).pgprot)
+
+#define __pte(x)	((pte_t) { (x) } )
+#define __pmd(x)	((pmd_t) { (x) } )
+#define __pgd(x)	((pgd_t) { (x) } )
+#define __pgprot(x)	((pgprot_t) { (x) } )
+
+/* to align the pointer to the (next) page boundary */
+#define PAGE_ALIGN(addr)	(((addr)+PAGE_SIZE-1)&PAGE_MASK)
+
+/* 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__ */
+
+#include <asm/page_offset.h>
+
+#define PAGE_OFFSET		(PAGE_OFFSET_RAW)
+
+#ifndef __ASSEMBLY__
+
+#ifndef CONFIG_SUN3
+
+#define WANT_PAGE_VIRTUAL
+#ifdef CONFIG_SINGLE_MEMORY_CHUNK
+extern unsigned long m68k_memoffset;
+
+#define __pa(vaddr)		((unsigned long)(vaddr)+m68k_memoffset)
+#define __va(paddr)		((void *)((unsigned long)(paddr)-m68k_memoffset))
+#else
+#define __pa(vaddr)		virt_to_phys((void *)vaddr)
+#define __va(paddr)		phys_to_virt((unsigned long)paddr)
+#endif
+
+#else	/* !CONFIG_SUN3 */
+/* This #define is a horrible hack to suppress lots of warnings. --m */
+#define __pa(x) ___pa((unsigned long)x)
+static inline unsigned long ___pa(unsigned long x)
+{
+     if(x == 0)
+	  return 0;
+     if(x >= PAGE_OFFSET)
+        return (x-PAGE_OFFSET);
+     else
+        return (x+0x2000000);
+}
+
+static inline void *__va(unsigned long x)
+{
+     if(x == 0)
+	  return (void *)0;
+
+     if(x < 0x2000000)
+        return (void *)(x+PAGE_OFFSET);
+     else
+        return (void *)(x-0x2000000);
+}
+#endif	/* CONFIG_SUN3 */
+
+/*
+ * NOTE: virtual isn't really correct, actually it should be the offset into the
+ * memory node, but we have no highmem, so that works for now.
+ * TODO: implement (fast) pfn<->pgdat_idx conversion functions, this makes lots
+ * of the shifts unnecessary.
+ */
+#define virt_to_pfn(kaddr)	(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_virt(pfn)	__va((pfn) << PAGE_SHIFT)
+
+#define virt_to_page(kaddr)	(mem_map + (((unsigned long)(kaddr)-PAGE_OFFSET) >> PAGE_SHIFT))
+#define page_to_virt(page)	((((page) - mem_map) << PAGE_SHIFT) + PAGE_OFFSET)
+
+#define pfn_to_page(pfn)	virt_to_page(pfn_to_virt(pfn))
+#define page_to_pfn(page)	virt_to_pfn(page_to_virt(page))
+
+#define virt_addr_valid(kaddr)	((void *)(kaddr) >= (void *)PAGE_OFFSET && (void *)(kaddr) < high_memory)
+#define pfn_valid(pfn)		virt_addr_valid(pfn_to_virt(pfn))
+
+#endif /* __ASSEMBLY__ */
+
+#define VM_DATA_DEFAULT_FLAGS	(VM_READ | VM_WRITE | VM_EXEC | \
+				 VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
+
+#endif /* __KERNEL__ */
+
+#endif /* _M68K_PAGE_H */