[linux-2.6-block.git] / arch / c6x / mm / init.c

/*
 *  Port on Texas Instruments TMS320C6x architecture
 *
 *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
 *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 */
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/module.h>
#include <linux/memblock.h>
#ifdef CONFIG_BLK_DEV_RAM
#include <linux/blkdev.h>
#endif
#include <linux/initrd.h>

#include <asm/sections.h>
#include <linux/uaccess.h>

/*
 * ZERO_PAGE is a special page that is used for zero-initialized
 * data and COW.
 */
unsigned long empty_zero_page;
EXPORT_SYMBOL(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)
{
	struct pglist_data *pgdat = NODE_DATA(0);
	unsigned long zones_size[MAX_NR_ZONES] = {0, };

	empty_zero_page      = (unsigned long) memblock_alloc(PAGE_SIZE,
							      PAGE_SIZE);
	if (!empty_zero_page)
		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
		      __func__, PAGE_SIZE, PAGE_SIZE);

	/*
	 * Set up user data space
	 */
	set_fs(KERNEL_DS);

	/*
	 * Define zones
	 */
	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
		__pa(PAGE_OFFSET) >> PAGE_SHIFT;

	free_area_init(zones_size);
}

void __init mem_init(void)
{
	high_memory = (void *)(memory_end & PAGE_MASK);

	/* this will put all memory onto the freelists */
	memblock_free_all();

	mem_init_print_info(NULL);
}

#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
	free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
#endif

void __init free_initmem(void)
{
	free_initmem_default(-1);
}
Commit	Line	Data
14aa7e8b AJ	1	/*
	2	* Port on Texas Instruments TMS320C6x architecture
	3	*
	4	* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
	5	* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#include <linux/mm.h>
	12	#include <linux/swap.h>
	13	#include <linux/module.h>
57c8a661	14	#include <linux/memblock.h>
14aa7e8b AJ	15	#ifdef CONFIG_BLK_DEV_RAM
	16	#include <linux/blkdev.h>
	17	#endif
	18	#include <linux/initrd.h>
	19
	20	#include <asm/sections.h>
7c0f6ba6	21	#include <linux/uaccess.h>
14aa7e8b AJ	22
	23	/*
	24	* ZERO_PAGE is a special page that is used for zero-initialized
	25	* data and COW.
	26	*/
	27	unsigned long empty_zero_page;
	28	EXPORT_SYMBOL(empty_zero_page);
	29
	30	/*
	31	* paging_init() continues the virtual memory environment setup which
	32	* was begun by the code in arch/head.S.
	33	* The parameters are pointers to where to stick the starting and ending
	34	* addresses of available kernel virtual memory.
	35	*/
	36	void __init paging_init(void)
	37	{
	38	struct pglist_data *pgdat = NODE_DATA(0);
	39	unsigned long zones_size[MAX_NR_ZONES] = {0, };
	40
15c3c114 MR	41	empty_zero_page = (unsigned long) memblock_alloc(PAGE_SIZE,
15c3c114 MR	42	PAGE_SIZE);
8a7f97b9 MR	43	if (!empty_zero_page)
	44	panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
	45	__func__, PAGE_SIZE, PAGE_SIZE);
14aa7e8b AJ	46
	47	/*
	48	* Set up user data space
	49	*/
	50	set_fs(KERNEL_DS);
	51
	52	/*
	53	* Define zones
	54	*/
	55	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
	56	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
	57	__pa(PAGE_OFFSET) >> PAGE_SHIFT;
	58
	59	free_area_init(zones_size);
	60	}
	61
	62	void __init mem_init(void)
	63	{
14aa7e8b AJ	64	high_memory = (void *)(memory_end & PAGE_MASK);
	65
	66	/* this will put all memory onto the freelists */
c6ffc5ca	67	memblock_free_all();
14aa7e8b	68
02f55324	69	mem_init_print_info(NULL);
14aa7e8b AJ	70	}
	71
	72	#ifdef CONFIG_BLK_DEV_INITRD
	73	void __init free_initrd_mem(unsigned long start, unsigned long end)
	74	{
dbe67df4	75	free_reserved_area((void )start, (void )end, -1, "initrd");
14aa7e8b AJ	76	}
	77	#endif
	78
	79	void __init free_initmem(void)
	80	{
dbe67df4	81	free_initmem_default(-1);
14aa7e8b	82	}