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
10#include <linux/module.h>
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#include <linux/gfp.h>
21
22#include <asm/setup.h>
23#include <asm/uaccess.h>
24#include <asm/page.h>
25#include <asm/pgalloc.h>
26#include <asm/traps.h>
27#include <asm/machdep.h>
28#include <asm/io.h>
29#ifdef CONFIG_ATARI
30#include <asm/atari_stram.h>
31#endif
32#include <asm/sections.h>
33#include <asm/tlb.h>
34
35pg_data_t pg_data_map[MAX_NUMNODES];
36EXPORT_SYMBOL(pg_data_map);
37
38int m68k_virt_to_node_shift;
39
40#ifndef CONFIG_SINGLE_MEMORY_CHUNK
41pg_data_t *pg_data_table[65];
42EXPORT_SYMBOL(pg_data_table);
43#endif
44
45void __init m68k_setup_node(int node)
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
59	pg_data_map[node].bdata = bootmem_node_data + node;
60	node_set_online(node);
61}
62
63
64/*
65 * ZERO_PAGE is a special page that is used for zero-initialized
66 * data and COW.
67 */
68
69void *empty_zero_page;
70EXPORT_SYMBOL(empty_zero_page);
71
72extern void init_pointer_table(unsigned long ptable);
73
74/* References to section boundaries */
75
76extern pmd_t *zero_pgtable;
77
78#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
79#define VECTORS	&vectors[0]
80#else
81#define VECTORS	_ramvec
82#endif
83
84void __init print_memmap(void)
85{
86#define UL(x) ((unsigned long) (x))
87#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
88#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
89#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
90
91	pr_notice("Virtual kernel memory layout:\n"
92		"    vector  : 0x%08lx - 0x%08lx   (%4ld KiB)\n"
93		"    kmap    : 0x%08lx - 0x%08lx   (%4ld MiB)\n"
94		"    vmalloc : 0x%08lx - 0x%08lx   (%4ld MiB)\n"
95		"    lowmem  : 0x%08lx - 0x%08lx   (%4ld MiB)\n"
96		"      .init : 0x%p" " - 0x%p" "   (%4d KiB)\n"
97		"      .text : 0x%p" " - 0x%p" "   (%4d KiB)\n"
98		"      .data : 0x%p" " - 0x%p" "   (%4d KiB)\n"
99		"      .bss  : 0x%p" " - 0x%p" "   (%4d KiB)\n",
100		MLK(VECTORS, VECTORS + 256),
101		MLM(KMAP_START, KMAP_END),
102		MLM(VMALLOC_START, VMALLOC_END),
103		MLM(PAGE_OFFSET, (unsigned long)high_memory),
104		MLK_ROUNDUP(__init_begin, __init_end),
105		MLK_ROUNDUP(_stext, _etext),
106		MLK_ROUNDUP(_sdata, _edata),
107		MLK_ROUNDUP(_sbss, _ebss));
108}
109
110void __init mem_init(void)
111{
112	pg_data_t *pgdat;
113	int codepages = 0;
114	int datapages = 0;
115	int initpages = 0;
116	int i;
117
118	/* this will put all memory onto the freelists */
119	totalram_pages = num_physpages = 0;
120	for_each_online_pgdat(pgdat) {
121		num_physpages += pgdat->node_present_pages;
122
123		totalram_pages += free_all_bootmem_node(pgdat);
124		for (i = 0; i < pgdat->node_spanned_pages; i++) {
125			struct page *page = pgdat->node_mem_map + i;
126			char *addr = page_to_virt(page);
127
128			if (!PageReserved(page))
129				continue;
130			if (addr >= _text &&
131			    addr < _etext)
132				codepages++;
133			else if (addr >= __init_begin &&
134				 addr < __init_end)
135				initpages++;
136			else
137				datapages++;
138		}
139	}
140
141#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
142	/* insert pointer tables allocated so far into the tablelist */
143	init_pointer_table((unsigned long)kernel_pg_dir);
144	for (i = 0; i < PTRS_PER_PGD; i++) {
145		if (pgd_present(kernel_pg_dir[i]))
146			init_pointer_table(__pgd_page(kernel_pg_dir[i]));
147	}
148
149	/* insert also pointer table that we used to unmap the zero page */
150	if (zero_pgtable)
151		init_pointer_table((unsigned long)zero_pgtable);
152#endif
153
154	printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
155	       nr_free_pages() << (PAGE_SHIFT-10),
156	       totalram_pages << (PAGE_SHIFT-10),
157	       codepages << (PAGE_SHIFT-10),
158	       datapages << (PAGE_SHIFT-10),
159	       initpages << (PAGE_SHIFT-10));
160	print_memmap();
161}
162
163#ifdef CONFIG_BLK_DEV_INITRD
164void free_initrd_mem(unsigned long start, unsigned long end)
165{
166	int pages = 0;
167	for (; start < end; start += PAGE_SIZE) {
168		ClearPageReserved(virt_to_page(start));
169		init_page_count(virt_to_page(start));
170		free_page(start);
171		totalram_pages++;
172		pages++;
173	}
174	printk ("Freeing initrd memory: %dk freed\n", pages);
175}
176#endif
177