aboutsummaryrefslogtreecommitdiffstats
path: root/arch/m68k/mm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/m68k/mm')
-rw-r--r--arch/m68k/mm/init_mm.c143
-rw-r--r--arch/m68k/mm/init_no.c151
2 files changed, 294 insertions, 0 deletions
diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init_mm.c
new file mode 100644
index 00000000000..bbe525434cc
--- /dev/null
+++ b/arch/m68k/mm/init_mm.c
@@ -0,0 +1,143 @@
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/system.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
78void __init mem_init(void)
79{
80 pg_data_t *pgdat;
81 int codepages = 0;
82 int datapages = 0;
83 int initpages = 0;
84 int i;
85
86 /* this will put all memory onto the freelists */
87 totalram_pages = num_physpages = 0;
88 for_each_online_pgdat(pgdat) {
89 num_physpages += pgdat->node_present_pages;
90
91 totalram_pages += free_all_bootmem_node(pgdat);
92 for (i = 0; i < pgdat->node_spanned_pages; i++) {
93 struct page *page = pgdat->node_mem_map + i;
94 char *addr = page_to_virt(page);
95
96 if (!PageReserved(page))
97 continue;
98 if (addr >= _text &&
99 addr < _etext)
100 codepages++;
101 else if (addr >= __init_begin &&
102 addr < __init_end)
103 initpages++;
104 else
105 datapages++;
106 }
107 }
108
109#ifndef CONFIG_SUN3
110 /* insert pointer tables allocated so far into the tablelist */
111 init_pointer_table((unsigned long)kernel_pg_dir);
112 for (i = 0; i < PTRS_PER_PGD; i++) {
113 if (pgd_present(kernel_pg_dir[i]))
114 init_pointer_table(__pgd_page(kernel_pg_dir[i]));
115 }
116
117 /* insert also pointer table that we used to unmap the zero page */
118 if (zero_pgtable)
119 init_pointer_table((unsigned long)zero_pgtable);
120#endif
121
122 printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n",
123 nr_free_pages() << (PAGE_SHIFT-10),
124 totalram_pages << (PAGE_SHIFT-10),
125 codepages << (PAGE_SHIFT-10),
126 datapages << (PAGE_SHIFT-10),
127 initpages << (PAGE_SHIFT-10));
128}
129
130#ifdef CONFIG_BLK_DEV_INITRD
131void free_initrd_mem(unsigned long start, unsigned long end)
132{
133 int pages = 0;
134 for (; start < end; start += PAGE_SIZE) {
135 ClearPageReserved(virt_to_page(start));
136 init_page_count(virt_to_page(start));
137 free_page(start);
138 totalram_pages++;
139 pages++;
140 }
141 printk ("Freeing initrd memory: %dk freed\n", pages);
142}
143#endif
diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c
new file mode 100644
index 00000000000..50cd12cf28d
--- /dev/null
+++ b/arch/m68k/mm/init_no.c
@@ -0,0 +1,151 @@
1/*
2 * linux/arch/m68knommu/mm/init.c
3 *
4 * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>,
5 * Kenneth Albanowski <kjahds@kjahds.com>,
6 * Copyright (C) 2000 Lineo, Inc. (www.lineo.com)
7 *
8 * Based on:
9 *
10 * linux/arch/m68k/mm/init.c
11 *
12 * Copyright (C) 1995 Hamish Macdonald
13 *
14 * JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)
15 * DEC/2000 -- linux 2.4 support <davidm@snapgear.com>
16 */
17
18#include <linux/signal.h>
19#include <linux/sched.h>
20#include <linux/kernel.h>
21#include <linux/errno.h>
22#include <linux/string.h>
23#include <linux/types.h>
24#include <linux/ptrace.h>
25#include <linux/mman.h>
26#include <linux/mm.h>
27#include <linux/swap.h>
28#include <linux/init.h>
29#include <linux/highmem.h>
30#include <linux/pagemap.h>
31#include <linux/bootmem.h>
32#include <linux/gfp.h>
33
34#include <asm/setup.h>
35#include <asm/segment.h>
36#include <asm/page.h>
37#include <asm/pgtable.h>
38#include <asm/system.h>
39#include <asm/machdep.h>
40
41/*
42 * ZERO_PAGE is a special page that is used for zero-initialized
43 * data and COW.
44 */
45void *empty_zero_page;
46
47extern unsigned long memory_start;
48extern unsigned long memory_end;
49
50/*
51 * paging_init() continues the virtual memory environment setup which
52 * was begun by the code in arch/head.S.
53 * The parameters are pointers to where to stick the starting and ending
54 * addresses of available kernel virtual memory.
55 */
56void __init paging_init(void)
57{
58 /*
59 * Make sure start_mem is page aligned, otherwise bootmem and
60 * page_alloc get different views of the world.
61 */
62 unsigned long end_mem = memory_end & PAGE_MASK;
63 unsigned long zones_size[MAX_NR_ZONES] = {0, };
64
65 empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
66 memset(empty_zero_page, 0, PAGE_SIZE);
67
68 /*
69 * Set up SFC/DFC registers (user data space).
70 */
71 set_fs (USER_DS);
72
73 zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
74 free_area_init(zones_size);
75}
76
77void __init mem_init(void)
78{
79 int codek = 0, datak = 0, initk = 0;
80 unsigned long tmp;
81 extern char _etext, _stext, _sdata, _ebss, __init_begin, __init_end;
82 extern unsigned int _ramend, _rambase;
83 unsigned long len = _ramend - _rambase;
84 unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */
85 unsigned long end_mem = memory_end; /* DAVIDM - this must not include kernel stack at top */
86
87 pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem);
88
89 end_mem &= PAGE_MASK;
90 high_memory = (void *) end_mem;
91
92 start_mem = PAGE_ALIGN(start_mem);
93 max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT;
94
95 /* this will put all memory onto the freelists */
96 totalram_pages = free_all_bootmem();
97
98 codek = (&_etext - &_stext) >> 10;
99 datak = (&_ebss - &_sdata) >> 10;
100 initk = (&__init_begin - &__init_end) >> 10;
101
102 tmp = nr_free_pages() << PAGE_SHIFT;
103 printk(KERN_INFO "Memory available: %luk/%luk RAM, (%dk kernel code, %dk data)\n",
104 tmp >> 10,
105 len >> 10,
106 codek,
107 datak
108 );
109}
110
111
112#ifdef CONFIG_BLK_DEV_INITRD
113void free_initrd_mem(unsigned long start, unsigned long end)
114{
115 int pages = 0;
116 for (; start < end; start += PAGE_SIZE) {
117 ClearPageReserved(virt_to_page(start));
118 init_page_count(virt_to_page(start));
119 free_page(start);
120 totalram_pages++;
121 pages++;
122 }
123 pr_notice("Freeing initrd memory: %luk freed\n",
124 pages * (PAGE_SIZE / 1024));
125}
126#endif
127
128void free_initmem(void)
129{
130#ifdef CONFIG_RAMKERNEL
131 unsigned long addr;
132 extern char __init_begin, __init_end;
133 /*
134 * The following code should be cool even if these sections
135 * are not page aligned.
136 */
137 addr = PAGE_ALIGN((unsigned long)(&__init_begin));
138 /* next to check that the page we free is not a partial page */
139 for (; addr + PAGE_SIZE < (unsigned long)(&__init_end); addr +=PAGE_SIZE) {
140 ClearPageReserved(virt_to_page(addr));
141 init_page_count(virt_to_page(addr));
142 free_page(addr);
143 totalram_pages++;
144 }
145 pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n",
146 (addr - PAGE_ALIGN((long) &__init_begin)) >> 10,
147 (int)(PAGE_ALIGN((unsigned long)(&__init_begin))),
148 (int)(addr - PAGE_SIZE));
149#endif
150}
151
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-14 09:42:59 -0400