m68k: remove redundant display of free swap space in show_mem()
[linux-2.6.git] / arch / m68k / mm / init.c
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
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
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 __init 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
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 {
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         for_each_online_pgdat(pgdat) {
83                 for (i = 0; i < pgdat->node_spanned_pages; i++) {
84                         struct page *page = pgdat->node_mem_map + i;
85                         total++;
86                         if (PageReserved(page))
87                                 reserved++;
88                         else if (PageSwapCache(page))
89                                 cached++;
90                         else if (!page_count(page))
91                                 free++;
92                         else
93                                 shared += page_count(page) - 1;
94                 }
95         }
96         printk("%d pages of RAM\n",total);
97         printk("%d free pages\n",free);
98         printk("%d reserved pages\n",reserved);
99         printk("%d pages shared\n",shared);
100         printk("%d pages swap cached\n",cached);
101 }
102
103 extern void init_pointer_table(unsigned long ptable);
104
105 /* References to section boundaries */
106
107 extern char _text[], _etext[];
108 extern char __init_begin[], __init_end[];
109
110 extern pmd_t *zero_pgtable;
111
112 void __init mem_init(void)
113 {
114         pg_data_t *pgdat;
115         int codepages = 0;
116         int datapages = 0;
117         int initpages = 0;
118         int i;
119
120 #ifdef CONFIG_ATARI
121         if (MACH_IS_ATARI)
122                 atari_stram_mem_init_hook();
123 #endif
124
125         /* this will put all memory onto the freelists */
126         totalram_pages = num_physpages = 0;
127         for_each_online_pgdat(pgdat) {
128                 num_physpages += pgdat->node_present_pages;
129
130                 totalram_pages += free_all_bootmem_node(pgdat);
131                 for (i = 0; i < pgdat->node_spanned_pages; i++) {
132                         struct page *page = pgdat->node_mem_map + i;
133                         char *addr = page_to_virt(page);
134
135                         if (!PageReserved(page))
136                                 continue;
137                         if (addr >= _text &&
138                             addr < _etext)
139                                 codepages++;
140                         else if (addr >= __init_begin &&
141                                  addr < __init_end)
142                                 initpages++;
143                         else
144                                 datapages++;
145                 }
146         }
147
148 #ifndef CONFIG_SUN3
149         /* insert pointer tables allocated so far into the tablelist */
150         init_pointer_table((unsigned long)kernel_pg_dir);
151         for (i = 0; i < PTRS_PER_PGD; i++) {
152                 if (pgd_present(kernel_pg_dir[i]))
153                         init_pointer_table(__pgd_page(kernel_pg_dir[i]));
154         }
155
156         /* insert also pointer table that we used to unmap the zero page */
157         if (zero_pgtable)
158                 init_pointer_table((unsigned long)zero_pgtable);
159 #endif
160
161         printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
162                (unsigned long)nr_free_pages() << (PAGE_SHIFT-10),
163                totalram_pages << (PAGE_SHIFT-10),
164                codepages << (PAGE_SHIFT-10),
165                datapages << (PAGE_SHIFT-10),
166                initpages << (PAGE_SHIFT-10));
167 }
168
169 #ifdef CONFIG_BLK_DEV_INITRD
170 void free_initrd_mem(unsigned long start, unsigned long end)
171 {
172         int pages = 0;
173         for (; start < end; start += PAGE_SIZE) {
174                 ClearPageReserved(virt_to_page(start));
175                 init_page_count(virt_to_page(start));
176                 free_page(start);
177                 totalram_pages++;
178                 pages++;
179         }
180         printk ("Freeing initrd memory: %dk freed\n", pages);
181 }
182 #endif