1 files changed, 148 insertions, 0 deletions
diff --git a/arch/m32r/mm/init.c b/arch/m32r/mm/init.c
new file mode 100644
index 000000000..0d4146f64
--- /dev/null
+++ b/arch/m32r/mm/init.c
@@ -0,0 +1,148 @@
+/*
+ *  linux/arch/m32r/mm/init.c
+ *
+ *  Copyright (c) 2001, 2002  Hitoshi Yamamoto
+ *
+ *  Some code taken from sh version.
+ *    Copyright (C) 1999  Niibe Yutaka
+ *    Based on linux/arch/i386/mm/init.c:
+ *      Copyright (C) 1995  Linus Torvalds
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/pagemap.h>
+#include <linux/bootmem.h>
+#include <linux/swap.h>
+#include <linux/highmem.h>
+#include <linux/bitops.h>
+#include <linux/nodemask.h>
+#include <linux/pfn.h>
+#include <linux/gfp.h>
+#include <asm/types.h>
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+#include <asm/setup.h>
+#include <asm/tlb.h>
+#include <asm/sections.h>
+
+pgd_t swapper_pg_dir[1024];
+
+/*
+ * Cache of MMU context last used.
+ */
+#ifndef CONFIG_SMP
+unsigned long mmu_context_cache_dat;
+#else
+unsigned long mmu_context_cache_dat[NR_CPUS];
+#endif
+
+/*
+ * function prototype
+ */
+void __init paging_init(void);
+void __init mem_init(void);
+void free_initmem(void);
+#ifdef CONFIG_BLK_DEV_INITRD
+void free_initrd_mem(unsigned long, unsigned long);
+#endif
+
+/* It'd be good if these lines were in the standard header file. */
+#define START_PFN(nid)		(NODE_DATA(nid)->bdata->node_min_pfn)
+#define MAX_LOW_PFN(nid)	(NODE_DATA(nid)->bdata->node_low_pfn)
+
+#ifndef CONFIG_DISCONTIGMEM
+void __init zone_sizes_init(void)
+{
+	unsigned long  zones_size[MAX_NR_ZONES] = {0, };
+	unsigned long  max_dma;
+	unsigned long  low;
+	unsigned long  start_pfn;
+
+#ifdef CONFIG_MMU
+	start_pfn = START_PFN(0);
+	max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
+	low = MAX_LOW_PFN(0);
+
+	if (low < max_dma){
+		zones_size[ZONE_DMA] = low - start_pfn;
+		zones_size[ZONE_NORMAL] = 0;
+	} else {
+		zones_size[ZONE_DMA] = low - start_pfn;
+		zones_size[ZONE_NORMAL] = low - max_dma;
+	}
+#else
+	zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
+	zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
+	start_pfn = __MEMORY_START >> PAGE_SHIFT;
+#endif /* CONFIG_MMU */
+
+	free_area_init_node(0, zones_size, start_pfn, 0);
+}
+#else	/* CONFIG_DISCONTIGMEM */
+extern void zone_sizes_init(void);
+#endif	/* CONFIG_DISCONTIGMEM */
+
+/*======================================================================*
+ * paging_init() : sets up the page tables
+ *======================================================================*/
+void __init paging_init(void)
+{
+#ifdef CONFIG_MMU
+	int  i;
+	pgd_t *pg_dir;
+
+	/* We don't need kernel mapping as hardware support that. */
+	pg_dir = swapper_pg_dir;
+
+	for (i = 0 ; i < USER_PTRS_PER_PGD * 2 ; i++)
+		pgd_val(pg_dir[i]) = 0;
+#endif /* CONFIG_MMU */
+	zone_sizes_init();
+}
+
+/*======================================================================*
+ * mem_init() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void __init mem_init(void)
+{
+#ifndef CONFIG_MMU
+	extern unsigned long memory_end;
+
+	high_memory = (void *)(memory_end & PAGE_MASK);
+#else
+	high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
+#endif /* CONFIG_MMU */
+
+	/* clear the zero-page */
+	memset(empty_zero_page, 0, PAGE_SIZE);
+
+	set_max_mapnr(get_num_physpages());
+	free_all_bootmem();
+	mem_init_print_info(NULL);
+}
+
+/*======================================================================*
+ * free_initmem() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void free_initmem(void)
+{
+	free_initmem_default(-1);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+/*======================================================================*
+ * free_initrd_mem() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+	free_reserved_area((void *)start, (void *)end, -1, "initrd");
+}
+#endif