--- /dev/null
+/*
+ * 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
+ */
+
+/* $Id$ */
+
+#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 <asm/types.h>
+#include <asm/processor.h>
+#include <asm/bitops.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>
+
+/* References to section boundaries */
+extern char _text, _etext, _edata;
+extern char __init_begin, __init_end;
+
+pgd_t swapper_pg_dir[1024];
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+void show_mem(void)
+{
+ int total = 0, reserved = 0;
+ int shared = 0, cached = 0;
+ int highmem = 0;
+ struct page *page;
+ pg_data_t *pgdat;
+ unsigned long i;
+
+ printk("Mem-info:\n");
+ show_free_areas();
+ printk("Free swap: %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
+ for_each_pgdat(pgdat) {
+ for (i = 0; i < pgdat->node_spanned_pages; ++i) {
+ page = pgdat->node_mem_map + i;
+ total++;
+ if (PageHighMem(page))
+ highmem++;
+ if (PageReserved(page))
+ reserved++;
+ else if (PageSwapCache(page))
+ cached++;
+ else if (page_count(page))
+ shared += page_count(page) - 1;
+ }
+ }
+ printk("%d pages of RAM\n", total);
+ printk("%d pages of HIGHMEM\n",highmem);
+ printk("%d reserved pages\n",reserved);
+ printk("%d pages shared\n",shared);
+ printk("%d pages swap cached\n",cached);
+}
+
+/*
+ * 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
+static unsigned long hole_pages;
+
+/*
+ * 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_boot_start >> PAGE_SHIFT)
+#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
+
+#ifndef CONFIG_DISCONTIGMEM
+unsigned long __init zone_sizes_init(void)
+{
+ unsigned long zones_size[MAX_NR_ZONES] = {0, 0, 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, NODE_DATA(0), zones_size, start_pfn, 0);
+
+ mem_map = contig_page_data.node_mem_map;
+
+ return 0;
+}
+#else /* CONFIG_DISCONTIGMEM */
+extern unsigned long 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 */
+ hole_pages = zone_sizes_init();
+}
+
+int __init reservedpages_count(void)
+{
+ int reservedpages, nid, i;
+
+ reservedpages = 0;
+ for (nid = 0 ; nid < numnodes ; nid++)
+ for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
+ if (PageReserved(NODE_DATA(nid)->node_mem_map + i))
+ reservedpages++;
+
+ return reservedpages;
+}
+
+/*======================================================================*
+ * mem_init() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void __init mem_init(void)
+{
+ int codesize, reservedpages, datasize, initsize;
+ int nid;
+#ifndef CONFIG_MMU
+ extern unsigned long memory_end;
+#endif
+
+ num_physpages = 0;
+ for (nid = 0 ; nid < numnodes ; nid++)
+ num_physpages += MAX_LOW_PFN(nid) - START_PFN(nid) + 1;
+
+ num_physpages -= hole_pages;
+
+#ifndef CONFIG_DISCONTIGMEM
+ max_mapnr = num_physpages;
+#endif /* CONFIG_DISCONTIGMEM */
+
+#ifdef CONFIG_MMU
+ high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
+#else
+ high_memory = (void *)(memory_end & PAGE_MASK);
+#endif /* CONFIG_MMU */
+
+ /* clear the zero-page */
+ memset(empty_zero_page, 0, PAGE_SIZE);
+
+ /* this will put all low memory onto the freelists */
+ for (nid = 0 ; nid < numnodes ; nid++)
+ totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
+
+ reservedpages = reservedpages_count() - hole_pages;
+ codesize = (unsigned long) &_etext - (unsigned long)&_text;
+ datasize = (unsigned long) &_edata - (unsigned long)&_etext;
+ initsize = (unsigned long) &__init_end - (unsigned long)&__init_begin;
+
+ printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
+ "%dk reserved, %dk data, %dk init)\n",
+ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+ num_physpages << (PAGE_SHIFT-10),
+ codesize >> 10,
+ reservedpages << (PAGE_SHIFT-10),
+ datasize >> 10,
+ initsize >> 10);
+}
+
+/*======================================================================*
+ * free_initmem() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void free_initmem(void)
+{
+ unsigned long addr;
+
+ addr = (unsigned long)(&__init_begin);
+ for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ set_page_count(virt_to_page(addr), 1);
+ free_page(addr);
+ totalram_pages++;
+ }
+ printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", \
+ (int)(&__init_end - &__init_begin) >> 10);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+/*======================================================================*
+ * free_initrd_mem() :
+ * orig : arch/sh/mm/init.c
+ *======================================================================*/
+void free_initrd_mem(unsigned long start, unsigned long end)
+{
+ unsigned long p;
+ for (p = start; p < end; p += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(p));
+ set_page_count(virt_to_page(p), 1);
+ free_page(p);
+ totalram_pages++;
+ }
+ printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
+}
+#endif
+
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