diff options
Diffstat (limited to 'target/linux/ubicom32/files/arch/ubicom32/mm/init.c')
| -rw-r--r-- | target/linux/ubicom32/files/arch/ubicom32/mm/init.c | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/target/linux/ubicom32/files/arch/ubicom32/mm/init.c b/target/linux/ubicom32/files/arch/ubicom32/mm/init.c deleted file mode 100644 index c486835415..0000000000 --- a/target/linux/ubicom32/files/arch/ubicom32/mm/init.c +++ /dev/null @@ -1,262 +0,0 @@ -/* - * arch/ubicom32/mm/init.c - * Ubicom32 architecture virtual memory initialization. - * - * (C) Copyright 2009, Ubicom, Inc. - * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, - * Kenneth Albanowski <kjahds@kjahds.com>, - * Copyright (C) 2000 Lineo, Inc. (www.lineo.com) - * - * Based on: - * - * linux/arch/m68k/mm/init.c - * - * Copyright (C) 1995 Hamish Macdonald - * - * JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com) - * DEC/2000 -- linux 2.4 support <davidm@snapgear.com> - * - * This file is part of the Ubicom32 Linux Kernel Port. - * - * The Ubicom32 Linux Kernel Port is free software: you can redistribute - * it and/or modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation, either version 2 of the - * License, or (at your option) any later version. - * - * The Ubicom32 Linux Kernel Port is distributed in the hope that it - * will be useful, but WITHOUT ANY WARRANTY; without even the implied - * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with the Ubicom32 Linux Kernel Port. If not, - * see <http://www.gnu.org/licenses/>. - * - * Ubicom32 implementation derived from (with many thanks): - * arch/m68knommu - * arch/blackfin - * arch/parisc - */ - -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/mman.h> -#include <linux/mm.h> -#include <linux/swap.h> -#include <linux/init.h> -#include <linux/highmem.h> -#include <linux/pagemap.h> -#include <linux/bootmem.h> -#include <linux/slab.h> - -#include <asm/setup.h> -#include <asm/segment.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/system.h> -#include <asm/machdep.h> -#include <asm/ocm-alloc.h> -#include <asm/processor.h> - -#undef DEBUG - -extern void die_if_kernel(char *,struct pt_regs *,long); -extern void free_initmem(void); - -/* - * BAD_PAGE is the page that is used for page faults when linux - * is out-of-memory. Older versions of linux just did a - * do_exit(), but using this instead means there is less risk - * for a process dying in kernel mode, possibly leaving a inode - * unused etc.. - * - * BAD_PAGETABLE is the accompanying page-table: it is initialized - * to point to BAD_PAGE entries. - * - * ZERO_PAGE is a special page that is used for zero-initialized - * data and COW. - */ -static unsigned long empty_bad_page_table; - -static unsigned long empty_bad_page; - -unsigned long empty_zero_page; - -void show_mem(void) -{ - unsigned long i; - int free = 0, total = 0, reserved = 0, shared = 0; - int cached = 0; - - printk(KERN_INFO "\nMem-info:\n"); - show_free_areas(); - 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 - shared += page_count(mem_map+i) - 1; - } - printk(KERN_INFO "%d pages of RAM\n",total); - printk(KERN_INFO "%d free pages\n",free); - printk(KERN_INFO "%d reserved pages\n",reserved); - printk(KERN_INFO "%d pages shared\n",shared); - printk(KERN_INFO "%d pages swap cached\n",cached); -} - -extern unsigned long memory_start; -extern unsigned long memory_end; -extern char __ocm_free_begin; -extern char __ocm_free_end; - -/* - * paging_init() continues the virtual memory environment setup which - * was begun by the code in arch/head.S. - * The parameters are pointers to where to stick the starting and ending - * addresses of available kernel virtual memory. - */ -void __init paging_init(void) -{ - /* - * Make sure start_mem is page aligned, otherwise bootmem and - * page_alloc get different views of the world. - */ -#ifdef DEBUG - unsigned long start_mem = PAGE_ALIGN(memory_start); -#endif - unsigned long end_mem = memory_end & PAGE_MASK; - -#ifdef DEBUG - printk (KERN_DEBUG "start_mem is %#lx\nvirtual_end is %#lx\n", - start_mem, end_mem); -#endif - - /* - * Initialize the bad page table and bad page to point - * to a couple of allocated pages. - */ - empty_bad_page_table = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); - empty_bad_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); - empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); - memset((void *)empty_zero_page, 0, PAGE_SIZE); - - /* - * TODO: enable setting up for user memory management interface. - */ - -#ifdef DEBUG - printk (KERN_DEBUG "before free_area_init\n"); - - printk (KERN_DEBUG "free_area_init -> start_mem is %#lx\nvirtual_end is %#lx\n", - start_mem, end_mem); -#endif - - { - unsigned long zones_size[MAX_NR_ZONES] = {0, }; -#ifdef CONFIG_ZONE_DMA - zones_size[ZONE_DMA] = OCMSIZE >> PAGE_SHIFT; -#endif - zones_size[ZONE_NORMAL] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT; -#ifdef CONFIG_HIGHMEM - zones_size[ZONE_HIGHMEM] = 0; -#endif - free_area_init(zones_size); - } -} - -void __init mem_init(void) -{ - int codek = 0, datak = 0, initk = 0; - unsigned long tmp, ram_start, ram_end, len; - extern char _etext, _stext, _sdata, _ebss, __init_begin, __init_end; - - unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */ - unsigned long end_mem = memory_end; /* DAVIDM - this must not include kernel stack at top */ - processor_dram(&ram_start, &ram_end); - len = (ram_end - ram_start) + OCMSIZE; -#ifdef DEBUG - printk(KERN_DEBUG "Mem_init: start=%lx, end=%lx\n", start_mem, end_mem); -#endif - - end_mem &= PAGE_MASK; - high_memory = (void *) end_mem; - - start_mem = PAGE_ALIGN(start_mem); - max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT; - - /* this will put all memory onto the freelists */ -#ifdef CONFIG_ZONE_DMA - { - unsigned long ocm_free_begin = (unsigned long)&__ocm_free_begin; - unsigned long ocm_free_end = (unsigned long)&__ocm_free_end; - unsigned long zone_dma_begin = (ocm_free_begin + PAGE_SIZE - 1) & PAGE_MASK; - unsigned long zone_dma_end = ocm_free_end & PAGE_MASK; - if (zone_dma_end > zone_dma_begin) - free_bootmem(zone_dma_begin, zone_dma_end-zone_dma_begin); - } -#endif - totalram_pages = free_all_bootmem(); - - codek = (&_etext - &_stext) >> 10; - datak = (&_ebss - &_sdata) >> 10; - initk = (&__init_begin - &__init_end) >> 10; - - tmp = nr_free_pages() << PAGE_SHIFT; - printk(KERN_INFO "Memory available: %luk/%luk RAM, (%dk kernel code, %dk data)\n", - tmp >> 10, - len >> 10, - codek, - datak - ); - -} - -#ifdef CONFIG_BLK_DEV_INITRD -void free_initrd_mem(unsigned long start, unsigned long end) -{ - int pages = 0; - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - init_page_count(virt_to_page(start)); - free_page(start); - totalram_pages++; - pages++; - } - printk (KERN_NOTICE "Freeing initrd memory: %dk freed\n", pages); -} -#endif - -void -free_initmem() -{ -#ifdef CONFIG_RAMKERNEL - unsigned long addr; - extern char __init_begin, __init_end; - /* - * The following code should be cool even if these sections - * are not page aligned. - */ - addr = PAGE_ALIGN((unsigned long)(&__init_begin)); - /* next to check that the page we free is not a partial page */ - for (; addr + PAGE_SIZE < (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_NOTICE "Freeing unused kernel memory: %ldk freed (0x%x - 0x%x)\n", - (addr - PAGE_ALIGN((long) &__init_begin)) >> 10, - (int)(PAGE_ALIGN((unsigned long)(&__init_begin))), - (int)(addr - PAGE_SIZE)); -#endif -} |