diff options
Diffstat (limited to 'arch/cris/mm/init.c')
| -rw-r--r-- | arch/cris/mm/init.c | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/arch/cris/mm/init.c b/arch/cris/mm/init.c new file mode 100644 index 0000000..31a0018 --- /dev/null +++ b/arch/cris/mm/init.c @@ -0,0 +1,225 @@ +/* + * 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)); +} |