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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/cris/mm/init.c
downloadlinux-stericsson-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/cris/mm/init.c')
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diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c
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+/*
+ * linux/arch/cris/mm/init.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Copyright (C) 2000,2001 Axis Communications AB
+ *
+ * Authors: Bjorn Wesen (bjornw@axis.com)
+ *
+ * $Log: init.c,v $
+ * Revision 1.11 2004/05/28 09:28:56 starvik
+ * Calculation of loops_per_usec moved because initalization order has changed
+ * in Linux 2.6.
+ *
+ * Revision 1.10 2004/05/14 07:58:05 starvik
+ * Merge of changes from 2.4
+ *
+ * Revision 1.9 2003/07/04 08:27:54 starvik
+ * Merge of Linux 2.5.74
+ *
+ * Revision 1.8 2003/04/09 05:20:48 starvik
+ * Merge of Linux 2.5.67
+ *
+ * Revision 1.7 2003/01/22 06:48:38 starvik
+ * Fixed warnings issued by GCC 3.2.1
+ *
+ * Revision 1.6 2002/12/11 14:44:48 starvik
+ * Extracted v10 (ETRAX 100LX) specific stuff to arch/cris/arch-v10/mm
+ *
+ * Revision 1.5 2002/11/18 07:37:37 starvik
+ * Added cache bug workaround (from Linux 2.4)
+ *
+ * Revision 1.4 2002/11/13 15:40:24 starvik
+ * Removed the page table cache stuff (as done in other archs)
+ *
+ * Revision 1.3 2002/11/05 06:45:13 starvik
+ * Merge of Linux 2.5.45
+ *
+ * Revision 1.2 2001/12/18 13:35:22 bjornw
+ * Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
+ *
+ * Revision 1.31 2001/11/13 16:22:00 bjornw
+ * Skip calculating totalram and sharedram in si_meminfo
+ *
+ * Revision 1.30 2001/11/12 19:02:10 pkj
+ * Fixed compiler warnings.
+ *
+ * Revision 1.29 2001/07/25 16:09:50 bjornw
+ * val->sharedram will stay 0
+ *
+ * Revision 1.28 2001/06/28 16:30:17 bjornw
+ * Oops. This needs to wait until 2.4.6 is merged
+ *
+ * Revision 1.27 2001/06/28 14:04:07 bjornw
+ * Fill in sharedram
+ *
+ * Revision 1.26 2001/06/18 06:36:02 hp
+ * Enable free_initmem of __init-type pages
+ *
+ * Revision 1.25 2001/06/13 00:02:23 bjornw
+ * Use a separate variable to store the current pgd to avoid races in schedule
+ *
+ * Revision 1.24 2001/05/15 00:52:20 hp
+ * Only map segment 0xa as seg if CONFIG_JULIETTE
+ *
+ * Revision 1.23 2001/04/04 14:35:40 bjornw
+ * * Removed get_pte_slow and friends (2.4.3 change)
+ * * Removed bad_pmd handling (2.4.3 change)
+ *
+ * Revision 1.22 2001/04/04 13:38:04 matsfg
+ * Moved ioremap to a separate function instead
+ *
+ * Revision 1.21 2001/03/27 09:28:33 bjornw
+ * ioremap used too early - lets try it in mem_init instead
+ *
+ * Revision 1.20 2001/03/23 07:39:21 starvik
+ * Corrected according to review remarks
+ *
+ * Revision 1.19 2001/03/15 14:25:17 bjornw
+ * More general shadow registers and ioremaped addresses for external I/O
+ *
+ * Revision 1.18 2001/02/23 12:46:44 bjornw
+ * * 0xc was not CSE1; 0x8 is, same as uncached flash, so we move the uncached
+ * flash during CRIS_LOW_MAP from 0xe to 0x8 so both the flash and the I/O
+ * is mapped straight over (for !CRIS_LOW_MAP the uncached flash is still 0xe)
+ *
+ * Revision 1.17 2001/02/22 15:05:21 bjornw
+ * Map 0x9 straight over during LOW_MAP to allow for memory mapped LEDs
+ *
+ * Revision 1.16 2001/02/22 15:02:35 bjornw
+ * Map 0xc straight over during LOW_MAP to allow for memory mapped I/O
+ *
+ * Revision 1.15 2001/01/10 21:12:10 bjornw
+ * loops_per_sec -> loops_per_jiffy
+ *
+ * Revision 1.14 2000/11/22 16:23:20 bjornw
+ * Initialize totalhigh counters to 0 to make /proc/meminfo look nice.
+ *
+ * Revision 1.13 2000/11/21 16:37:51 bjornw
+ * Temporarily disable initmem freeing
+ *
+ * Revision 1.12 2000/11/21 13:55:07 bjornw
+ * Use CONFIG_CRIS_LOW_MAP for the low VM map instead of explicit CPU type
+ *
+ * Revision 1.11 2000/10/06 12:38:22 bjornw
+ * Cast empty_bad_page correctly (should really be of * type from the start..
+ *
+ * Revision 1.10 2000/10/04 16:53:57 bjornw
+ * Fix memory-map due to LX features
+ *
+ * Revision 1.9 2000/09/13 15:47:49 bjornw
+ * Wrong count in reserved-pages loop
+ *
+ * Revision 1.8 2000/09/13 14:35:10 bjornw
+ * 2.4.0-test8 added a new arg to free_area_init_node
+ *
+ * Revision 1.7 2000/08/17 15:35:55 bjornw
+ * 2.4.0-test6 removed MAP_NR and inserted virt_to_page
+ *
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <asm/tlb.h>
+
+DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
+
+unsigned long empty_zero_page;
+
+extern char _stext, _edata, _etext; /* From linkerscript */
+extern char __init_begin, __init_end;
+
+void
+show_mem(void)
+{
+ int i,free = 0,total = 0,cached = 0, reserved = 0, nonshared = 0;
+ int shared = 0;
+
+ printk("\nMem-info:\n");
+ show_free_areas();
+ printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
+ i = max_mapnr;
+ while (i-- > 0) {
+ total++;
+ if (PageReserved(mem_map+i))
+ reserved++;
+ else if (PageSwapCache(mem_map+i))
+ cached++;
+ else if (!page_count(mem_map+i))
+ free++;
+ else if (page_count(mem_map+i) == 1)
+ nonshared++;
+ else
+ shared += page_count(mem_map+i) - 1;
+ }
+ printk("%d pages of RAM\n",total);
+ printk("%d free pages\n",free);
+ printk("%d reserved pages\n",reserved);
+ printk("%d pages nonshared\n",nonshared);
+ printk("%d pages shared\n",shared);
+ printk("%d pages swap cached\n",cached);
+}
+
+void __init
+mem_init(void)
+{
+ int codesize, reservedpages, datasize, initsize;
+ unsigned long tmp;
+
+ if(!mem_map)
+ BUG();
+
+ /* max/min_low_pfn was set by setup.c
+ * now we just copy it to some other necessary places...
+ *
+ * high_memory was also set in setup.c
+ */
+
+ max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
+
+ /* this will put all memory onto the freelists */
+ totalram_pages = free_all_bootmem();
+
+ reservedpages = 0;
+ for (tmp = 0; tmp < max_mapnr; tmp++) {
+ /*
+ * Only count reserved RAM pages
+ */
+ if (PageReserved(mem_map + tmp))
+ reservedpages++;
+ }
+
+ codesize = (unsigned long) &_etext - (unsigned long) &_stext;
+ datasize = (unsigned long) &_edata - (unsigned long) &_etext;
+ initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
+
+ printk(KERN_INFO
+ "Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
+ "%dk init)\n" ,
+ (unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
+ max_mapnr << (PAGE_SHIFT-10),
+ codesize >> 10,
+ reservedpages << (PAGE_SHIFT-10),
+ datasize >> 10,
+ initsize >> 10
+ );
+}
+
+/* free the pages occupied by initialization code */
+
+void
+free_initmem(void)
+{
+ unsigned long addr;
+
+ addr = (unsigned long)(&__init_begin);
+ for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
+ ClearPageReserved(virt_to_page(addr));
+ set_page_count(virt_to_page(addr), 1);
+ free_page(addr);
+ totalram_pages++;
+ }
+ printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
+ (unsigned long)((&__init_end - &__init_begin) >> 10));
+}