[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / m68k / mm / init.c

/*
 *  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 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
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/m68k/mm/init.c
	3	*
	4	* Copyright (C) 1995 Hamish Macdonald
	5	*
	6	* Contains common initialization routines, specific init code moved
	7	* to motorola.c and sun3mmu.c
	8	*/
	9
12d810c1	10	#include <linux/module.h>
1da177e4 LT	11	#include <linux/signal.h>
	12	#include <linux/sched.h>
	13	#include <linux/mm.h>
	14	#include <linux/swap.h>
	15	#include <linux/kernel.h>
	16	#include <linux/string.h>
	17	#include <linux/types.h>
	18	#include <linux/init.h>
	19	#include <linux/bootmem.h>
	20
	21	#include <asm/setup.h>
	22	#include <asm/uaccess.h>
	23	#include <asm/page.h>
	24	#include <asm/pgalloc.h>
	25	#include <asm/system.h>
	26	#include <asm/machdep.h>
	27	#include <asm/io.h>
	28	#ifdef CONFIG_ATARI
	29	#include <asm/atari_stram.h>
	30	#endif
	31	#include <asm/tlb.h>
	32
	33	DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
	34
12d810c1 RZ	35	static bootmem_data_t __initdata bootmem_data[MAX_NUMNODES];
	36
	37	pg_data_t pg_data_map[MAX_NUMNODES];
	38	EXPORT_SYMBOL(pg_data_map);
	39
	40	int m68k_virt_to_node_shift;
	41
	42	#ifndef CONFIG_SINGLE_MEMORY_CHUNK
	43	pg_data_t *pg_data_table[65];
	44	EXPORT_SYMBOL(pg_data_table);
	45	#endif
	46
	47	void m68k_setup_node(int node)
	48	{
	49	#ifndef CONFIG_SINGLE_MEMORY_CHUNK
	50	struct mem_info *info = m68k_memory + node;
	51	int i, end;
	52
	53	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
	54	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
	55	for (; i <= end; i++) {
	56	if (pg_data_table[i])
	57	printk("overlap at %u for chunk %u\n", i, node);
	58	pg_data_table[i] = pg_data_map + node;
	59	}
	60	#endif
	61	pg_data_map[node].bdata = bootmem_data + node;
	62	node_set_online(node);
	63	}
	64
	65
1da177e4 LT	66	/*
	67	* ZERO_PAGE is a special page that is used for zero-initialized
	68	* data and COW.
	69	*/
	70
	71	void *empty_zero_page;
	72
	73	void show_mem(void)
	74	{
12d810c1 RZ	75	pg_data_t *pgdat;
	76	int free = 0, total = 0, reserved = 0, shared = 0;
	77	int cached = 0;
	78	int i;
	79
	80	printk("\nMem-info:\n");
	81	show_free_areas();
	82	printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
	83	for_each_online_pgdat(pgdat) {
	84	for (i = 0; i < pgdat->node_spanned_pages; i++) {
	85	struct page *page = pgdat->node_mem_map + i;
	86	total++;
	87	if (PageReserved(page))
	88	reserved++;
	89	else if (PageSwapCache(page))
	90	cached++;
	91	else if (!page_count(page))
	92	free++;
	93	else
	94	shared += page_count(page) - 1;
	95	}
	96	}
	97	printk("%d pages of RAM\n",total);
	98	printk("%d free pages\n",free);
	99	printk("%d reserved pages\n",reserved);
	100	printk("%d pages shared\n",shared);
	101	printk("%d pages swap cached\n",cached);
1da177e4 LT	102	}
	103
	104	extern void init_pointer_table(unsigned long ptable);
	105
	106	/* References to section boundaries */
	107
12d810c1 RZ	108	extern char _text[], _etext[];
12d810c1 RZ	109	extern char __init_begin[], __init_end[];
1da177e4 LT	110
	111	extern pmd_t *zero_pgtable;
	112
	113	void __init mem_init(void)
	114	{
12d810c1	115	pg_data_t *pgdat;
1da177e4 LT	116	int codepages = 0;
	117	int datapages = 0;
	118	int initpages = 0;
1da177e4	119	int i;
1da177e4 LT	120
	121	#ifdef CONFIG_ATARI
	122	if (MACH_IS_ATARI)
	123	atari_stram_mem_init_hook();
	124	#endif
	125
	126	/* this will put all memory onto the freelists */
12d810c1 RZ	127	totalram_pages = num_physpages = 0;
	128	for_each_online_pgdat(pgdat) {
	129	num_physpages += pgdat->node_present_pages;
	130
	131	totalram_pages += free_all_bootmem_node(pgdat);
	132	for (i = 0; i < pgdat->node_spanned_pages; i++) {
	133	struct page *page = pgdat->node_mem_map + i;
	134	char *addr = page_to_virt(page);
	135
	136	if (!PageReserved(page))
	137	continue;
	138	if (addr >= _text &&
	139	addr < _etext)
1da177e4	140	codepages++;
12d810c1 RZ	141	else if (addr >= __init_begin &&
12d810c1 RZ	142	addr < __init_end)
1da177e4 LT	143	initpages++;
	144	else
	145	datapages++;
1da177e4 LT	146	}
	147	}
	148
	149	#ifndef CONFIG_SUN3
	150	/* insert pointer tables allocated so far into the tablelist */
	151	init_pointer_table((unsigned long)kernel_pg_dir);
	152	for (i = 0; i < PTRS_PER_PGD; i++) {
	153	if (pgd_present(kernel_pg_dir[i]))
	154	init_pointer_table(__pgd_page(kernel_pg_dir[i]));
	155	}
	156
	157	/* insert also pointer table that we used to unmap the zero page */
	158	if (zero_pgtable)
	159	init_pointer_table((unsigned long)zero_pgtable);
	160	#endif
	161
	162	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
	163	(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
12d810c1	164	totalram_pages << (PAGE_SHIFT-10),
1da177e4 LT	165	codepages << (PAGE_SHIFT-10),
	166	datapages << (PAGE_SHIFT-10),
	167	initpages << (PAGE_SHIFT-10));
	168	}
	169
	170	#ifdef CONFIG_BLK_DEV_INITRD
	171	void free_initrd_mem(unsigned long start, unsigned long end)
	172	{
	173	int pages = 0;
	174	for (; start < end; start += PAGE_SIZE) {
	175	ClearPageReserved(virt_to_page(start));
7835e98b	176	init_page_count(virt_to_page(start));
1da177e4 LT	177	free_page(start);
	178	totalram_pages++;
	179	pages++;
	180	}
	181	printk ("Freeing initrd memory: %dk freed\n", pages);
	182	}
	183	#endif