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hc
2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb 
 kernel/arch/m68k/mm/memory.c
....@@ -17,113 +17,9 @@
1717 #include <asm/setup.h>
1818 #include <asm/segment.h>
1919 #include <asm/page.h>
20
-#include <asm/pgalloc.h>
2120 #include <asm/traps.h>
2221 #include <asm/machdep.h>
2322 
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-
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-/* ++andreas: {get,free}_pointer_table rewritten to use unused fields from
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-   struct page instead of separately kmalloced struct.  Stolen from
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-   arch/sparc/mm/srmmu.c ... */
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-
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-typedef struct list_head ptable_desc;
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-static LIST_HEAD(ptable_list);
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-
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-#define PD_PTABLE(page) ((ptable_desc *)&(virt_to_page(page)->lru))
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-#define PD_PAGE(ptable) (list_entry(ptable, struct page, lru))
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-#define PD_MARKBITS(dp) (*(unsigned char *)&PD_PAGE(dp)->index)
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-
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-#define PTABLE_SIZE (PTRS_PER_PMD * sizeof(pmd_t))
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-
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-void __init init_pointer_table(unsigned long ptable)
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-{
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-	ptable_desc *dp;
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-	unsigned long page = ptable & PAGE_MASK;
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-	unsigned char mask = 1 << ((ptable - page)/PTABLE_SIZE);
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-
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-	dp = PD_PTABLE(page);
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-	if (!(PD_MARKBITS(dp) & mask)) {
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-		PD_MARKBITS(dp) = 0xff;
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-		list_add(dp, &ptable_list);
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-	}
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-
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-	PD_MARKBITS(dp) &= ~mask;
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-	pr_debug("init_pointer_table: %lx, %x\n", ptable, PD_MARKBITS(dp));
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-
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-	/* unreserve the page so it's possible to free that page */
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-	PD_PAGE(dp)->flags &= ~(1 << PG_reserved);
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-	init_page_count(PD_PAGE(dp));
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-
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-	return;
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-}
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-
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-pmd_t *get_pointer_table (void)
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-{
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-	ptable_desc *dp = ptable_list.next;
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-	unsigned char mask = PD_MARKBITS (dp);
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-	unsigned char tmp;
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-	unsigned int off;
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-
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-	/*
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-	 * For a pointer table for a user process address space, a
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-	 * table is taken from a page allocated for the purpose.  Each
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-	 * page can hold 8 pointer tables.  The page is remapped in
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-	 * virtual address space to be noncacheable.
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-	 */
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-	if (mask == 0) {
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-		void *page;
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-		ptable_desc *new;
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-
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-		if (!(page = (void *)get_zeroed_page(GFP_KERNEL)))
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-			return NULL;
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-
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-		flush_tlb_kernel_page(page);
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-		nocache_page(page);
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-
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-		new = PD_PTABLE(page);
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-		PD_MARKBITS(new) = 0xfe;
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-		list_add_tail(new, dp);
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-
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-		return (pmd_t *)page;
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-	}
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-
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-	for (tmp = 1, off = 0; (mask & tmp) == 0; tmp <<= 1, off += PTABLE_SIZE)
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-		;
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-	PD_MARKBITS(dp) = mask & ~tmp;
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-	if (!PD_MARKBITS(dp)) {
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-		/* move to end of list */
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-		list_move_tail(dp, &ptable_list);
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-	}
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-	return (pmd_t *) (page_address(PD_PAGE(dp)) + off);
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-}
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-
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-int free_pointer_table (pmd_t *ptable)
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-{
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-	ptable_desc *dp;
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-	unsigned long page = (unsigned long)ptable & PAGE_MASK;
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-	unsigned char mask = 1 << (((unsigned long)ptable - page)/PTABLE_SIZE);
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-
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-	dp = PD_PTABLE(page);
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-	if (PD_MARKBITS (dp) & mask)
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-		panic ("table already free!");
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-
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-	PD_MARKBITS (dp) |= mask;
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-
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-	if (PD_MARKBITS(dp) == 0xff) {
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-		/* all tables in page are free, free page */
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-		list_del(dp);
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-		cache_page((void *)page);
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-		free_page (page);
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-		return 1;
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-	} else if (ptable_list.next != dp) {
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-		/*
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-		 * move this descriptor to the front of the list, since
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-		 * it has one or more free tables.
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-		 */
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-		list_move(dp, &ptable_list);
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-	}
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-	return 0;
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-}
12723 
12824 /* invalidate page in both caches */
12925 static inline void clear040(unsigned long paddr)