/* * 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 #include #include 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)); init_page_count(virt_to_page(addr)); free_page(addr); totalram_pages++; } printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n", (unsigned long)((&__init_end - &__init_begin) >> 10)); }