Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 *  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/module.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);

static bootmem_data_t __initdata bootmem_data[MAX_NUMNODES];

pg_data_t pg_data_map[MAX_NUMNODES];

EXPORT_SYMBOL(pg_data_map);

int m68k_virt_to_node_shift;

#ifndef CONFIG_SINGLE_MEMORY_CHUNK

pg_data_t *pg_data_table[65];

EXPORT_SYMBOL(pg_data_table);

#endif

void __init m68k_setup_node(int node)

{

#ifndef CONFIG_SINGLE_MEMORY_CHUNK

        struct mem_info *info = m68k_memory + node;

        int i, end;

        i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();

        end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();

        for (; i <= end; i++) {

                if (pg_data_table[i])

                        printk("overlap at %u for chunk %u\n", i, node);

                pg_data_table[i] = pg_data_map + node;

        }

#endif

        pg_data_map[node].bdata = bootmem_data + node;

        node_set_online(node);

}

/*

 * ZERO_PAGE is a special page that is used for zero-initialized

 * data and COW.

 */

void *empty_zero_page;

void show_mem(void)

{

        pg_data_t *pgdat;

        int free = 0, total = 0, reserved = 0, shared = 0;

        int cached = 0;

        int i;

        printk("\nMem-info:\n");

        show_free_areas();

        printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));

        for_each_online_pgdat(pgdat) {

                for (i = 0; i < pgdat->node_spanned_pages; i++) {

                        struct page *page = pgdat->node_mem_map + i;

                        total++;

                        if (PageReserved(page))

                                reserved++;

                        else if (PageSwapCache(page))

                                cached++;

                        else if (!page_count(page))

                                free++;

                        else

                                shared += page_count(page) - 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[];

extern char __init_begin[], __init_end[];

extern pmd_t *zero_pgtable;

void __init mem_init(void)

{

        pg_data_t *pgdat;

        int codepages = 0;

        int datapages = 0;

        int initpages = 0;

        int i;

#ifdef CONFIG_ATARI

        if (MACH_IS_ATARI)

                atari_stram_mem_init_hook();

#endif

        /* this will put all memory onto the freelists */

        totalram_pages = num_physpages = 0;

        for_each_online_pgdat(pgdat) {

                num_physpages += pgdat->node_present_pages;

                totalram_pages += free_all_bootmem_node(pgdat);

                for (i = 0; i < pgdat->node_spanned_pages; i++) {

                        struct page *page = pgdat->node_mem_map + i;

                        char *addr = page_to_virt(page);

                        if (!PageReserved(page))

                                continue;

                        if (addr >= _text &&

                            addr < _etext)

                                codepages++;

                        else if (addr >= __init_begin &&

                                 addr < __init_end)

                                initpages++;

                        else

                                datapages++;

                }

        }

#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),

               totalram_pages << (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));

                init_page_count(virt_to_page(start));

                free_page(start);

                totalram_pages++;

                pages++;

        }

        printk ("Freeing initrd memory: %dk freed\n", pages);

}

#endif