2 * Copyright (C) 2012 Regents of the University of California
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
14 #include <linux/init.h>
16 #include <linux/memblock.h>
17 #include <linux/initrd.h>
18 #include <linux/swap.h>
19 #include <linux/sizes.h>
21 #include <asm/tlbflush.h>
22 #include <asm/sections.h>
23 #include <asm/pgtable.h>
26 static void __init zone_sizes_init(void)
28 unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
30 #ifdef CONFIG_ZONE_DMA32
31 max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
33 max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
35 free_area_init_nodes(max_zone_pfns);
38 void setup_zero_page(void)
40 memset((void *)empty_zero_page, 0, PAGE_SIZE);
43 void __init paging_init(void)
46 local_flush_tlb_all();
50 void __init mem_init(void)
54 #endif /* CONFIG_FLATMEM */
56 high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
59 mem_init_print_info(NULL);
62 void free_initmem(void)
64 free_initmem_default(0);
67 #ifdef CONFIG_BLK_DEV_INITRD
68 void free_initrd_mem(unsigned long start, unsigned long end)
71 #endif /* CONFIG_BLK_DEV_INITRD */