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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/m68k/mm/init_no.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/m68k/mm/init_no.c')
-rw-r--r--arch/m68k/mm/init_no.c145
1 files changed, 145 insertions, 0 deletions
diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c
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+++ b/arch/m68k/mm/init_no.c
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+/*
+ * linux/arch/m68knommu/mm/init.c
+ *
+ * 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>
+ */
+
+#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/gfp.h>
+
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/segment.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/machdep.h>
+
+/*
+ * ZERO_PAGE is a special page that is used for zero-initialized
+ * data and COW.
+ */
+void *empty_zero_page;
+
+/*
+ * 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.
+ */
+ unsigned long end_mem = memory_end & PAGE_MASK;
+ unsigned long zones_size[MAX_NR_ZONES] = {0, };
+
+ empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
+ memset(empty_zero_page, 0, PAGE_SIZE);
+
+ /*
+ * Set up SFC/DFC registers (user data space).
+ */
+ set_fs (USER_DS);
+
+ zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
+ free_area_init(zones_size);
+}
+
+void __init mem_init(void)
+{
+ int codek = 0, datak = 0, initk = 0;
+ unsigned long tmp;
+ unsigned long len = _ramend - _rambase;
+ 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 */
+
+ pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem);
+
+ 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 */
+ 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++;
+ }
+ pr_notice("Freeing initrd memory: %luk freed\n",
+ pages * (PAGE_SIZE / 1024));
+}
+#endif
+
+void free_initmem(void)
+{
+#ifdef CONFIG_RAMKERNEL
+ unsigned long addr;
+ /*
+ * 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++;
+ }
+ pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n",
+ (addr - PAGE_ALIGN((unsigned long) __init_begin)) >> 10,
+ (int)(PAGE_ALIGN((unsigned long) __init_begin)),
+ (int)(addr - PAGE_SIZE));
+#endif
+}
+