[net-next-2.6.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);

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_node_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;
EXPORT_SYMBOL(empty_zero_page);

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	pg_data_t pg_data_map[MAX_NUMNODES];
	36	EXPORT_SYMBOL(pg_data_map);
	37
	38	int m68k_virt_to_node_shift;
	39
	40	#ifndef CONFIG_SINGLE_MEMORY_CHUNK
	41	pg_data_t *pg_data_table[65];
	42	EXPORT_SYMBOL(pg_data_table);
	43	#endif
	44
66a3f820	45	void __init m68k_setup_node(int node)
12d810c1 RZ	46	{
	47	#ifndef CONFIG_SINGLE_MEMORY_CHUNK
	48	struct mem_info *info = m68k_memory + node;
	49	int i, end;
	50
	51	i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
	52	end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
	53	for (; i <= end; i++) {
	54	if (pg_data_table[i])
	55	printk("overlap at %u for chunk %u\n", i, node);
	56	pg_data_table[i] = pg_data_map + node;
	57	}
	58	#endif
b61bfa3c	59	pg_data_map[node].bdata = bootmem_node_data + node;
12d810c1 RZ	60	node_set_online(node);
	61	}
	62
	63
1da177e4 LT	64	/*
	65	* ZERO_PAGE is a special page that is used for zero-initialized
	66	* data and COW.
	67	*/
	68
	69	void *empty_zero_page;
5fcf4303	70	EXPORT_SYMBOL(empty_zero_page);
1da177e4	71
1da177e4 LT	72	extern void init_pointer_table(unsigned long ptable);
	73
	74	/* References to section boundaries */
	75
12d810c1 RZ	76	extern char _text[], _etext[];
12d810c1 RZ	77	extern char __init_begin[], __init_end[];
1da177e4 LT	78
	79	extern pmd_t *zero_pgtable;
	80
	81	void __init mem_init(void)
	82	{
12d810c1	83	pg_data_t *pgdat;
1da177e4 LT	84	int codepages = 0;
	85	int datapages = 0;
	86	int initpages = 0;
1da177e4	87	int i;
1da177e4 LT	88
	89	#ifdef CONFIG_ATARI
	90	if (MACH_IS_ATARI)
	91	atari_stram_mem_init_hook();
	92	#endif
	93
	94	/* this will put all memory onto the freelists */
12d810c1 RZ	95	totalram_pages = num_physpages = 0;
	96	for_each_online_pgdat(pgdat) {
	97	num_physpages += pgdat->node_present_pages;
	98
	99	totalram_pages += free_all_bootmem_node(pgdat);
	100	for (i = 0; i < pgdat->node_spanned_pages; i++) {
	101	struct page *page = pgdat->node_mem_map + i;
	102	char *addr = page_to_virt(page);
	103
	104	if (!PageReserved(page))
	105	continue;
	106	if (addr >= _text &&
	107	addr < _etext)
1da177e4	108	codepages++;
12d810c1 RZ	109	else if (addr >= __init_begin &&
12d810c1 RZ	110	addr < __init_end)
1da177e4 LT	111	initpages++;
	112	else
	113	datapages++;
1da177e4 LT	114	}
	115	}
	116
	117	#ifndef CONFIG_SUN3
	118	/* insert pointer tables allocated so far into the tablelist */
	119	init_pointer_table((unsigned long)kernel_pg_dir);
	120	for (i = 0; i < PTRS_PER_PGD; i++) {
	121	if (pgd_present(kernel_pg_dir[i]))
	122	init_pointer_table(__pgd_page(kernel_pg_dir[i]));
	123	}
	124
	125	/* insert also pointer table that we used to unmap the zero page */
	126	if (zero_pgtable)
	127	init_pointer_table((unsigned long)zero_pgtable);
	128	#endif
	129
	130	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
	131	(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
12d810c1	132	totalram_pages << (PAGE_SHIFT-10),
1da177e4 LT	133	codepages << (PAGE_SHIFT-10),
	134	datapages << (PAGE_SHIFT-10),
	135	initpages << (PAGE_SHIFT-10));
	136	}
	137
	138	#ifdef CONFIG_BLK_DEV_INITRD
	139	void free_initrd_mem(unsigned long start, unsigned long end)
	140	{
	141	int pages = 0;
	142	for (; start < end; start += PAGE_SIZE) {
	143	ClearPageReserved(virt_to_page(start));
7835e98b	144	init_page_count(virt_to_page(start));
1da177e4 LT	145	free_page(start);
	146	totalram_pages++;
	147	pages++;
	148	}
	149	printk ("Freeing initrd memory: %dk freed\n", pages);
	150	}
	151	#endif