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Greg Ungererdd1cb3a2012-10-24 22:36:27 +10001/*
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
35/*
36 * ZERO_PAGE is a special page that is used for zero-initialized
37 * data and COW.
38 */
39void *empty_zero_page;
40EXPORT_SYMBOL(empty_zero_page);
41
Greg Ungererd6fccc72013-01-07 16:13:04 +100042#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
43extern void init_pointer_table(unsigned long ptable);
44extern pmd_t *zero_pgtable;
45#endif
46
Greg Ungerer66d857b2011-03-22 13:39:27 +100047#ifdef CONFIG_MMU
Greg Ungererdd1cb3a2012-10-24 22:36:27 +100048
49pg_data_t pg_data_map[MAX_NUMNODES];
50EXPORT_SYMBOL(pg_data_map);
51
52int m68k_virt_to_node_shift;
53
54#ifndef CONFIG_SINGLE_MEMORY_CHUNK
55pg_data_t *pg_data_table[65];
56EXPORT_SYMBOL(pg_data_table);
57#endif
58
59void __init m68k_setup_node(int node)
60{
61#ifndef CONFIG_SINGLE_MEMORY_CHUNK
Geert Uytterhoeven79930082013-10-02 21:50:56 +020062 struct m68k_mem_info *info = m68k_memory + node;
Greg Ungererdd1cb3a2012-10-24 22:36:27 +100063 int i, end;
64
65 i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
66 end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
67 for (; i <= end; i++) {
68 if (pg_data_table[i])
69 printk("overlap at %u for chunk %u\n", i, node);
70 pg_data_table[i] = pg_data_map + node;
71 }
72#endif
73 pg_data_map[node].bdata = bootmem_node_data + node;
74 node_set_online(node);
75}
76
Greg Ungererdd1cb3a2012-10-24 22:36:27 +100077#else /* CONFIG_MMU */
78
79/*
80 * paging_init() continues the virtual memory environment setup which
81 * was begun by the code in arch/head.S.
82 * The parameters are pointers to where to stick the starting and ending
83 * addresses of available kernel virtual memory.
84 */
85void __init paging_init(void)
86{
87 /*
88 * Make sure start_mem is page aligned, otherwise bootmem and
89 * page_alloc get different views of the world.
90 */
91 unsigned long end_mem = memory_end & PAGE_MASK;
92 unsigned long zones_size[MAX_NR_ZONES] = { 0, };
93
94 high_memory = (void *) end_mem;
95
96 empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
Greg Ungererdd1cb3a2012-10-24 22:36:27 +100097
98 /*
99 * Set up SFC/DFC registers (user data space).
100 */
101 set_fs (USER_DS);
102
103 zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
104 free_area_init(zones_size);
105}
106
Greg Ungererf50bf882012-10-23 13:40:36 +1000107#endif /* CONFIG_MMU */
108
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000109void free_initmem(void)
110{
Greg Ungererf50bf882012-10-23 13:40:36 +1000111#ifndef CONFIG_MMU_SUN3
Jiang Liudbe67df2013-07-03 15:02:51 -0700112 free_initmem_default(-1);
Greg Ungererf50bf882012-10-23 13:40:36 +1000113#endif /* CONFIG_MMU_SUN3 */
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000114}
115
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000116#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
117#define VECTORS &vectors[0]
Greg Ungerer66d857b2011-03-22 13:39:27 +1000118#else
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000119#define VECTORS _ramvec
120#endif
121
122void __init print_memmap(void)
123{
124#define UL(x) ((unsigned long) (x))
125#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
126#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
127#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
128
129 pr_notice("Virtual kernel memory layout:\n"
130 " vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
131 " kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
132 " vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
133 " lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
134 " .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
135 " .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
136 " .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
137 " .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
138 MLK(VECTORS, VECTORS + 256),
139 MLM(KMAP_START, KMAP_END),
140 MLM(VMALLOC_START, VMALLOC_END),
141 MLM(PAGE_OFFSET, (unsigned long)high_memory),
142 MLK_ROUNDUP(__init_begin, __init_end),
143 MLK_ROUNDUP(_stext, _etext),
144 MLK_ROUNDUP(_sdata, _edata),
145 MLK_ROUNDUP(__bss_start, __bss_stop));
146}
147
Jiang Liu3e548a92013-07-03 15:04:37 -0700148static inline void init_pointer_tables(void)
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000149{
Jiang Liu3e548a92013-07-03 15:04:37 -0700150#if defined(CONFIG_MMU) && !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000151 int i;
152
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000153 /* insert pointer tables allocated so far into the tablelist */
154 init_pointer_table((unsigned long)kernel_pg_dir);
155 for (i = 0; i < PTRS_PER_PGD; i++) {
156 if (pgd_present(kernel_pg_dir[i]))
157 init_pointer_table(__pgd_page(kernel_pg_dir[i]));
158 }
159
160 /* insert also pointer table that we used to unmap the zero page */
161 if (zero_pgtable)
162 init_pointer_table((unsigned long)zero_pgtable);
163#endif
Jiang Liu3e548a92013-07-03 15:04:37 -0700164}
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000165
Jiang Liu3e548a92013-07-03 15:04:37 -0700166void __init mem_init(void)
167{
168 /* this will put all memory onto the freelists */
169 free_all_bootmem();
170 init_pointer_tables();
Jiang Liu96714682013-07-03 15:04:00 -0700171 mem_init_print_info(NULL);
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000172 print_memmap();
173}
174
175#ifdef CONFIG_BLK_DEV_INITRD
176void free_initrd_mem(unsigned long start, unsigned long end)
177{
Jiang Liudbe67df2013-07-03 15:02:51 -0700178 free_reserved_area((void *)start, (void *)end, -1, "initrd");
Greg Ungererdd1cb3a2012-10-24 22:36:27 +1000179}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180#endif