[mirror_ubuntu-jammy-kernel.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/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);

/*
 * ZERO_PAGE is a special page that is used for zero-initialized
 * data and COW.
 */

void *empty_zero_page;

void show_mem(void)
{
    unsigned long i;
    int free = 0, total = 0, reserved = 0, shared = 0;
    int cached = 0;

    printk("\nMem-info:\n");
    show_free_areas();
    printk("Free swap:       %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
    i = max_mapnr;
    while (i-- > 0) {
	total++;
	if (PageReserved(mem_map+i))
	    reserved++;
	else if (PageSwapCache(mem_map+i))
	    cached++;
	else if (!page_count(mem_map+i))
	    free++;
	else
	    shared += page_count(mem_map+i) - 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, _edata, __bss_start, _end;
extern char __init_begin, __init_end;

extern pmd_t *zero_pgtable;

void __init mem_init(void)
{
	int codepages = 0;
	int datapages = 0;
	int initpages = 0;
	unsigned long tmp;
#ifndef CONFIG_SUN3
	int i;
#endif

	max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT);

#ifdef CONFIG_ATARI
	if (MACH_IS_ATARI)
		atari_stram_mem_init_hook();
#endif

	/* this will put all memory onto the freelists */
	totalram_pages = free_all_bootmem();

	for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) {
		if (PageReserved(virt_to_page(tmp))) {
			if (tmp >= (unsigned long)&_text
			    && tmp < (unsigned long)&_etext)
				codepages++;
			else if (tmp >= (unsigned long) &__init_begin
				 && tmp < (unsigned long) &__init_end)
				initpages++;
			else
				datapages++;
			continue;
		}
	}

#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),
	       max_mapnr << (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
1da177e4 LT	10	#include <linux/signal.h>
	11	#include <linux/sched.h>
	12	#include <linux/mm.h>
	13	#include <linux/swap.h>
	14	#include <linux/kernel.h>
	15	#include <linux/string.h>
	16	#include <linux/types.h>
	17	#include <linux/init.h>
	18	#include <linux/bootmem.h>
	19
	20	#include <asm/setup.h>
	21	#include <asm/uaccess.h>
	22	#include <asm/page.h>
	23	#include <asm/pgalloc.h>
	24	#include <asm/system.h>
	25	#include <asm/machdep.h>
	26	#include <asm/io.h>
	27	#ifdef CONFIG_ATARI
	28	#include <asm/atari_stram.h>
	29	#endif
	30	#include <asm/tlb.h>
	31
	32	DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
	33
	34	/*
	35	* ZERO_PAGE is a special page that is used for zero-initialized
	36	* data and COW.
	37	*/
	38
	39	void *empty_zero_page;
	40
	41	void show_mem(void)
	42	{
	43	unsigned long i;
	44	int free = 0, total = 0, reserved = 0, shared = 0;
	45	int cached = 0;
	46
	47	printk("\nMem-info:\n");
	48	show_free_areas();
	49	printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
	50	i = max_mapnr;
	51	while (i-- > 0) {
	52	total++;
	53	if (PageReserved(mem_map+i))
	54	reserved++;
	55	else if (PageSwapCache(mem_map+i))
	56	cached++;
	57	else if (!page_count(mem_map+i))
	58	free++;
	59	else
	60	shared += page_count(mem_map+i) - 1;
	61	}
	62	printk("%d pages of RAM\n",total);
	63	printk("%d free pages\n",free);
	64	printk("%d reserved pages\n",reserved);
	65	printk("%d pages shared\n",shared);
	66	printk("%d pages swap cached\n",cached);
	67	}
	68
	69	extern void init_pointer_table(unsigned long ptable);
	70
	71	/* References to section boundaries */
	72
	73	extern char _text, _etext, _edata, __bss_start, _end;
74	extern char __init_begin, __init_end;
75
76	extern pmd_t *zero_pgtable;
77
78	void __init mem_init(void)
79	{
80	int codepages = 0;
81	int datapages = 0;
82	int initpages = 0;
83	unsigned long tmp;
84	#ifndef CONFIG_SUN3
85	int i;
86	#endif
87
88	max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT);
89
90	#ifdef CONFIG_ATARI
91	if (MACH_IS_ATARI)
92	atari_stram_mem_init_hook();
93	#endif
94
95	/* this will put all memory onto the freelists */
96	totalram_pages = free_all_bootmem();
97
98	for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) {
99	if (PageReserved(virt_to_page(tmp))) {
100	if (tmp >= (unsigned long)&_text
101	&& tmp < (unsigned long)&_etext)
102	codepages++;
103	else if (tmp >= (unsigned long) &__init_begin
104	&& tmp < (unsigned long) &__init_end)
105	initpages++;
106	else
107	datapages++;
108	continue;
109	}
110	}
111
112	#ifndef CONFIG_SUN3
113	/* insert pointer tables allocated so far into the tablelist */
114	init_pointer_table((unsigned long)kernel_pg_dir);
115	for (i = 0; i < PTRS_PER_PGD; i++) {
116	if (pgd_present(kernel_pg_dir[i]))
117	init_pointer_table(__pgd_page(kernel_pg_dir[i]));
118	}
119
120	/* insert also pointer table that we used to unmap the zero page */
121	if (zero_pgtable)
122	init_pointer_table((unsigned long)zero_pgtable);
123	#endif
124
125	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
126	(unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
127	max_mapnr << (PAGE_SHIFT-10),
128	codepages << (PAGE_SHIFT-10),
129	datapages << (PAGE_SHIFT-10),
130	initpages << (PAGE_SHIFT-10));
131	}
132
133	#ifdef CONFIG_BLK_DEV_INITRD
134	void free_initrd_mem(unsigned long start, unsigned long end)
135	{
136	int pages = 0;
137	for (; start < end; start += PAGE_SIZE) {
138	ClearPageReserved(virt_to_page(start));
7835e98b	139	init_page_count(virt_to_page(start));
1da177e4 LT	140	free_page(start);
	141	totalram_pages++;
	142	pages++;
	143	}
	144	printk ("Freeing initrd memory: %dk freed\n", pages);
	145	}
	146	#endif