Add KEY_MICMUTE and enable it on Lenovo X220
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / m68k / mm / init_no.c
blob7cbd7bd1f8bcd74352fda4c1db5c3f928d230936
1 /*
2 * linux/arch/m68knommu/mm/init.c
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)
8 * Based on:
10 * linux/arch/m68k/mm/init.c
12 * Copyright (C) 1995 Hamish Macdonald
14 * JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com)
15 * DEC/2000 -- linux 2.4 support <davidm@snapgear.com>
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>
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>
42 * ZERO_PAGE is a special page that is used for zero-initialized
43 * data and COW.
45 unsigned long empty_zero_page;
47 extern unsigned long memory_start;
48 extern unsigned long memory_end;
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.
56 void __init paging_init(void)
59 * Make sure start_mem is page aligned, otherwise bootmem and
60 * page_alloc get different views of the world.
62 unsigned long end_mem = memory_end & PAGE_MASK;
63 unsigned long zones_size[MAX_NR_ZONES] = {0, };
65 empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE);
66 memset((void *)empty_zero_page, 0, PAGE_SIZE);
69 * Set up SFC/DFC registers (user data space).
71 set_fs (USER_DS);
73 zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
74 free_area_init(zones_size);
77 void __init mem_init(void)
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 */
87 pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem);
89 end_mem &= PAGE_MASK;
90 high_memory = (void *) end_mem;
92 start_mem = PAGE_ALIGN(start_mem);
93 max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT;
95 /* this will put all memory onto the freelists */
96 totalram_pages = free_all_bootmem();
98 codek = (&_etext - &_stext) >> 10;
99 datak = (&_ebss - &_sdata) >> 10;
100 initk = (&__init_begin - &__init_end) >> 10;
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
112 #ifdef CONFIG_BLK_DEV_INITRD
113 void free_initrd_mem(unsigned long start, unsigned long end)
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++;
123 printk (KERN_NOTICE "Freeing initrd memory: %dk freed\n", pages * (PAGE_SIZE / 1024));
125 #endif
127 void free_initmem(void)
129 #ifdef CONFIG_RAMKERNEL
130 unsigned long addr;
131 extern char __init_begin, __init_end;
133 * The following code should be cool even if these sections
134 * are not page aligned.
136 addr = PAGE_ALIGN((unsigned long)(&__init_begin));
137 /* next to check that the page we free is not a partial page */
138 for (; addr + PAGE_SIZE < (unsigned long)(&__init_end); addr +=PAGE_SIZE) {
139 ClearPageReserved(virt_to_page(addr));
140 init_page_count(virt_to_page(addr));
141 free_page(addr);
142 totalram_pages++;
144 printk(KERN_NOTICE "Freeing unused kernel memory: %ldk freed (0x%x - 0x%x)\n",
145 (addr - PAGE_ALIGN((long) &__init_begin)) >> 10,
146 (int)(PAGE_ALIGN((unsigned long)(&__init_begin))),
147 (int)(addr - PAGE_SIZE));
148 #endif