mm: drop unneeded pgdat argument from free_area_init_node()
[linux-2.6.git] / arch / m32r / mm / init.c
1 /*
2  *  linux/arch/m32r/mm/init.c
3  *
4  *  Copyright (c) 2001, 2002  Hitoshi Yamamoto
5  *
6  *  Some code taken from sh version.
7  *    Copyright (C) 1999  Niibe Yutaka
8  *    Based on linux/arch/i386/mm/init.c:
9  *      Copyright (C) 1995  Linus Torvalds
10  */
11
12 #include <linux/init.h>
13 #include <linux/kernel.h>
14 #include <linux/mm.h>
15 #include <linux/pagemap.h>
16 #include <linux/bootmem.h>
17 #include <linux/swap.h>
18 #include <linux/highmem.h>
19 #include <linux/bitops.h>
20 #include <linux/nodemask.h>
21 #include <linux/pfn.h>
22 #include <asm/types.h>
23 #include <asm/processor.h>
24 #include <asm/page.h>
25 #include <asm/pgtable.h>
26 #include <asm/pgalloc.h>
27 #include <asm/mmu_context.h>
28 #include <asm/setup.h>
29 #include <asm/tlb.h>
30
31 /* References to section boundaries */
32 extern char _text, _etext, _edata;
33 extern char __init_begin, __init_end;
34
35 pgd_t swapper_pg_dir[1024];
36
37 DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
38
39 void show_mem(void)
40 {
41         int total = 0, reserved = 0;
42         int shared = 0, cached = 0;
43         int highmem = 0;
44         struct page *page;
45         pg_data_t *pgdat;
46         unsigned long i;
47
48         printk("Mem-info:\n");
49         show_free_areas();
50         printk("Free swap:       %6ldkB\n",nr_swap_pages<<(PAGE_SHIFT-10));
51         for_each_online_pgdat(pgdat) {
52                 unsigned long flags;
53                 pgdat_resize_lock(pgdat, &flags);
54                 for (i = 0; i < pgdat->node_spanned_pages; ++i) {
55                         page = pgdat_page_nr(pgdat, i);
56                         total++;
57                         if (PageHighMem(page))
58                                 highmem++;
59                         if (PageReserved(page))
60                                 reserved++;
61                         else if (PageSwapCache(page))
62                                 cached++;
63                         else if (page_count(page))
64                                 shared += page_count(page) - 1;
65                 }
66                 pgdat_resize_unlock(pgdat, &flags);
67         }
68         printk("%d pages of RAM\n", total);
69         printk("%d pages of HIGHMEM\n",highmem);
70         printk("%d reserved pages\n",reserved);
71         printk("%d pages shared\n",shared);
72         printk("%d pages swap cached\n",cached);
73 }
74
75 /*
76  * Cache of MMU context last used.
77  */
78 #ifndef CONFIG_SMP
79 unsigned long mmu_context_cache_dat;
80 #else
81 unsigned long mmu_context_cache_dat[NR_CPUS];
82 #endif
83 static unsigned long hole_pages;
84
85 /*
86  * function prototype
87  */
88 void __init paging_init(void);
89 void __init mem_init(void);
90 void free_initmem(void);
91 #ifdef CONFIG_BLK_DEV_INITRD
92 void free_initrd_mem(unsigned long, unsigned long);
93 #endif
94
95 /* It'd be good if these lines were in the standard header file. */
96 #define START_PFN(nid)  \
97         (NODE_DATA(nid)->bdata->node_boot_start >> PAGE_SHIFT)
98 #define MAX_LOW_PFN(nid)        (NODE_DATA(nid)->bdata->node_low_pfn)
99
100 #ifndef CONFIG_DISCONTIGMEM
101 unsigned long __init zone_sizes_init(void)
102 {
103         unsigned long  zones_size[MAX_NR_ZONES] = {0, };
104         unsigned long  max_dma;
105         unsigned long  low;
106         unsigned long  start_pfn;
107
108 #ifdef CONFIG_MMU
109         start_pfn = START_PFN(0);
110         max_dma = virt_to_phys((char *)MAX_DMA_ADDRESS) >> PAGE_SHIFT;
111         low = MAX_LOW_PFN(0);
112
113         if (low < max_dma){
114                 zones_size[ZONE_DMA] = low - start_pfn;
115                 zones_size[ZONE_NORMAL] = 0;
116         } else {
117                 zones_size[ZONE_DMA] = low - start_pfn;
118                 zones_size[ZONE_NORMAL] = low - max_dma;
119         }
120 #else
121         zones_size[ZONE_DMA] = 0 >> PAGE_SHIFT;
122         zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT;
123         start_pfn = __MEMORY_START >> PAGE_SHIFT;
124 #endif /* CONFIG_MMU */
125
126         free_area_init_node(0, zones_size, start_pfn, 0);
127
128         return 0;
129 }
130 #else   /* CONFIG_DISCONTIGMEM */
131 extern unsigned long zone_sizes_init(void);
132 #endif  /* CONFIG_DISCONTIGMEM */
133
134 /*======================================================================*
135  * paging_init() : sets up the page tables
136  *======================================================================*/
137 void __init paging_init(void)
138 {
139 #ifdef CONFIG_MMU
140         int  i;
141         pgd_t *pg_dir;
142
143         /* We don't need kernel mapping as hardware support that. */
144         pg_dir = swapper_pg_dir;
145
146         for (i = 0 ; i < USER_PTRS_PER_PGD * 2 ; i++)
147                 pgd_val(pg_dir[i]) = 0;
148 #endif /* CONFIG_MMU */
149         hole_pages = zone_sizes_init();
150 }
151
152 int __init reservedpages_count(void)
153 {
154         int reservedpages, nid, i;
155
156         reservedpages = 0;
157         for_each_online_node(nid) {
158                 unsigned long flags;
159                 pgdat_resize_lock(NODE_DATA(nid), &flags);
160                 for (i = 0 ; i < MAX_LOW_PFN(nid) - START_PFN(nid) ; i++)
161                         if (PageReserved(nid_page_nr(nid, i)))
162                                 reservedpages++;
163                 pgdat_resize_unlock(NODE_DATA(nid), &flags);
164         }
165
166         return reservedpages;
167 }
168
169 /*======================================================================*
170  * mem_init() :
171  * orig : arch/sh/mm/init.c
172  *======================================================================*/
173 void __init mem_init(void)
174 {
175         int codesize, reservedpages, datasize, initsize;
176         int nid;
177 #ifndef CONFIG_MMU
178         extern unsigned long memory_end;
179 #endif
180
181         num_physpages = 0;
182         for_each_online_node(nid)
183                 num_physpages += MAX_LOW_PFN(nid) - START_PFN(nid) + 1;
184
185         num_physpages -= hole_pages;
186
187 #ifndef CONFIG_DISCONTIGMEM
188         max_mapnr = num_physpages;
189 #endif  /* CONFIG_DISCONTIGMEM */
190
191 #ifdef CONFIG_MMU
192         high_memory = (void *)__va(PFN_PHYS(MAX_LOW_PFN(0)));
193 #else
194         high_memory = (void *)(memory_end & PAGE_MASK);
195 #endif /* CONFIG_MMU */
196
197         /* clear the zero-page */
198         memset(empty_zero_page, 0, PAGE_SIZE);
199
200         /* this will put all low memory onto the freelists */
201         for_each_online_node(nid)
202                 totalram_pages += free_all_bootmem_node(NODE_DATA(nid));
203
204         reservedpages = reservedpages_count() - hole_pages;
205         codesize = (unsigned long) &_etext - (unsigned long)&_text;
206         datasize = (unsigned long) &_edata - (unsigned long)&_etext;
207         initsize = (unsigned long) &__init_end - (unsigned long)&__init_begin;
208
209         printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
210                 "%dk reserved, %dk data, %dk init)\n",
211                 (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
212                 num_physpages << (PAGE_SHIFT-10),
213                 codesize >> 10,
214                 reservedpages << (PAGE_SHIFT-10),
215                 datasize >> 10,
216                 initsize >> 10);
217 }
218
219 /*======================================================================*
220  * free_initmem() :
221  * orig : arch/sh/mm/init.c
222  *======================================================================*/
223 void free_initmem(void)
224 {
225         unsigned long addr;
226
227         addr = (unsigned long)(&__init_begin);
228         for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
229                 ClearPageReserved(virt_to_page(addr));
230                 init_page_count(virt_to_page(addr));
231                 free_page(addr);
232                 totalram_pages++;
233         }
234         printk (KERN_INFO "Freeing unused kernel memory: %dk freed\n", \
235           (int)(&__init_end - &__init_begin) >> 10);
236 }
237
238 #ifdef CONFIG_BLK_DEV_INITRD
239 /*======================================================================*
240  * free_initrd_mem() :
241  * orig : arch/sh/mm/init.c
242  *======================================================================*/
243 void free_initrd_mem(unsigned long start, unsigned long end)
244 {
245         unsigned long p;
246         for (p = start; p < end; p += PAGE_SIZE) {
247                 ClearPageReserved(virt_to_page(p));
248                 init_page_count(virt_to_page(p));
249                 free_page(p);
250                 totalram_pages++;
251         }
252         printk (KERN_INFO "Freeing initrd memory: %ldk freed\n", (end - start) >> 10);
253 }
254 #endif
255