1 files changed, 147 insertions, 0 deletions
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
new file mode 100644
index 0000000..c45beb9
--- /dev/null
+++ b/arch/m68k/mm/init.c
@@ -0,0 +1,147 @@
+/*
+ *  linux/arch/m68k/mm/init.c
+ *
+ *  Copyright (C) 1995  Hamish Macdonald
+ *
+ *  Contains common initialization routines, specific init code moved
+ *  to motorola.c and sun3mmu.c
+ */
+
+#include <linux/config.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+
+#include <asm/setup.h>
+#include <asm/uaccess.h>
+#include <asm/page.h>
+#include <asm/pgalloc.h>
+#include <asm/system.h>
+#include <asm/machdep.h>
+#include <asm/io.h>
+#ifdef CONFIG_ATARI
+#include <asm/atari_stram.h>
+#endif
+#include <asm/tlb.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+
+void *empty_zero_page;
+
+void show_mem(void)
+{
+    unsigned long i;
+    int free = 0, total = 0, reserved = 0, shared = 0;
+    int cached = 0;
+
+    printk("\nMem-info:\n");
+    show_free_areas();
+    printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+    i = max_mapnr;
+    while (i-- > 0) {
+	total++;
+	if (PageReserved(mem_map+i))
+	    reserved++;
+	else if (PageSwapCache(mem_map+i))
+	    cached++;
+	else if (!page_count(mem_map+i))
+	    free++;
+	else
+	    shared += page_count(mem_map+i) - 1;
+    }
+    printk("%d pages of RAM\n",total);
+    printk("%d free pages\n",free);
+    printk("%d reserved pages\n",reserved);
+    printk("%d pages shared\n",shared);
+    printk("%d pages swap cached\n",cached);
+}
+
+extern void init_pointer_table(unsigned long ptable);
+
+/* References to section boundaries */
+
+extern char _text, _etext, _edata, __bss_start, _end;
+extern char __init_begin, __init_end;
+
+extern pmd_t *zero_pgtable;
+
+void __init mem_init(void)
+{
+	int codepages = 0;
+	int datapages = 0;
+	int initpages = 0;
+	unsigned long tmp;
+#ifndef CONFIG_SUN3
+	int i;
+#endif
+
+	max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT);
+
+#ifdef CONFIG_ATARI
+	if (MACH_IS_ATARI)
+		atari_stram_mem_init_hook();
+#endif
+
+	/* this will put all memory onto the freelists */
+	totalram_pages = free_all_bootmem();
+
+	for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) {
+		if (PageReserved(virt_to_page(tmp))) {
+			if (tmp >= (unsigned long)&_text
+			    && tmp < (unsigned long)&_etext)
+				codepages++;
+			else if (tmp >= (unsigned long) &__init_begin
+				 && tmp < (unsigned long) &__init_end)
+				initpages++;
+			else
+				datapages++;
+			continue;
+		}
+	}
+
+#ifndef CONFIG_SUN3
+	/* insert pointer tables allocated so far into the tablelist */
+	init_pointer_table((unsigned long)kernel_pg_dir);
+	for (i = 0; i < PTRS_PER_PGD; i++) {
+		if (pgd_present(kernel_pg_dir[i]))
+			init_pointer_table(__pgd_page(kernel_pg_dir[i]));
+	}
+
+	/* insert also pointer table that we used to unmap the zero page */
+	if (zero_pgtable)
+		init_pointer_table((unsigned long)zero_pgtable);
+#endif
+
+	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
+	       (unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
+	       max_mapnr << (PAGE_SHIFT-10),
+	       codepages << (PAGE_SHIFT-10),
+	       datapages << (PAGE_SHIFT-10),
+	       initpages << (PAGE_SHIFT-10));
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+	int pages = 0;
+	for (; start < end; start += PAGE_SIZE) {
+		ClearPageReserved(virt_to_page(start));
+		set_page_count(virt_to_page(start), 1);
+		free_page(start);
+		totalram_pages++;
+		pages++;
+	}
+	printk ("Freeing initrd memory: %dk freed\n", pages);
+}
+#endif