[linux-block.git] / arch / riscv / mm / init.c

/*
 * Copyright (C) 2012 Regents of the University of California
 *
 *   This program 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, version 2.
 *
 *   This program 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.
 */

#include <linux/init.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <linux/initrd.h>
#include <linux/swap.h>
#include <linux/sizes.h>

#include <asm/tlbflush.h>
#include <asm/sections.h>
#include <asm/pgtable.h>
#include <asm/io.h>

static void __init zone_sizes_init(void)
{
	unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };

#ifdef CONFIG_ZONE_DMA32
	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
#endif
	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;

	free_area_init_nodes(max_zone_pfns);
}

void setup_zero_page(void)
{
	memset((void *)empty_zero_page, 0, PAGE_SIZE);
}

void __init paging_init(void)
{
	setup_zero_page();
	local_flush_tlb_all();
	zone_sizes_init();
}

void __init mem_init(void)
{
#ifdef CONFIG_FLATMEM
	BUG_ON(!mem_map);
#endif /* CONFIG_FLATMEM */

	high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
	memblock_free_all();

	mem_init_print_info(NULL);
}

void free_initmem(void)
{
	free_initmem_default(0);
}

#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
}
#endif /* CONFIG_BLK_DEV_INITRD */
Commit	Line	Data
76d2a049 PD	1	/*
	2	* Copyright (C) 2012 Regents of the University of California
	3	*
	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.
	7	*
	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.
	12	*/
	13
	14	#include <linux/init.h>
	15	#include <linux/mm.h>
76d2a049	16	#include <linux/memblock.h>
57c8a661	17	#include <linux/initrd.h>
76d2a049	18	#include <linux/swap.h>
5ec9c4ff	19	#include <linux/sizes.h>
76d2a049 PD	20
	21	#include <asm/tlbflush.h>
	22	#include <asm/sections.h>
	23	#include <asm/pgtable.h>
	24	#include <asm/io.h>
	25
	26	static void __init zone_sizes_init(void)
	27	{
5ec9c4ff	28	unsigned long max_zone_pfns[MAX_NR_ZONES] = { 0, };
76d2a049	29
d5fad48c	30	#ifdef CONFIG_ZONE_DMA32
5ec9c4ff	31	max_zone_pfns[ZONE_DMA32] = PFN_DOWN(min(4UL * SZ_1G, max_low_pfn));
d5fad48c	32	#endif
5ec9c4ff CH	33	max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
	34
	35	free_area_init_nodes(max_zone_pfns);
76d2a049 PD	36	}
	37
	38	void setup_zero_page(void)
	39	{
	40	memset((void *)empty_zero_page, 0, PAGE_SIZE);
	41	}
	42
	43	void __init paging_init(void)
	44	{
76d2a049 PD	45	setup_zero_page();
	46	local_flush_tlb_all();
	47	zone_sizes_init();
	48	}
	49
	50	void __init mem_init(void)
	51	{
	52	#ifdef CONFIG_FLATMEM
	53	BUG_ON(!mem_map);
	54	#endif /* CONFIG_FLATMEM */
	55
	56	high_memory = (void *)(__va(PFN_PHYS(max_low_pfn)));
c6ffc5ca	57	memblock_free_all();
76d2a049 PD	58
	59	mem_init_print_info(NULL);
	60	}
	61
	62	void free_initmem(void)
	63	{
	64	free_initmem_default(0);
	65	}
	66
	67	#ifdef CONFIG_BLK_DEV_INITRD
	68	void free_initrd_mem(unsigned long start, unsigned long end)
	69	{
	70	}
	71	#endif /* CONFIG_BLK_DEV_INITRD */