[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/bootmem.h>
#ifdef CONFIG_BLK_DEV_RAM
#include <linux/blkdev.h>
#endif
#include <linux/initrd.h>

#include <asm/sections.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) alloc_bootmem_pages(PAGE_SIZE);
	memset((void *)empty_zero_page, 0, 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)
{
	int codek, datak;
	unsigned long tmp;
	unsigned long len = memory_end - memory_start;

	high_memory = (void *)(memory_end & PAGE_MASK);

	/* this will put all memory onto the freelists */
	totalram_pages = free_all_bootmem();

	codek = (_etext - _stext) >> 10;
	datak = (_end - _sdata) >> 10;

	tmp = nr_free_pages() << PAGE_SHIFT;
	printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n",
	       tmp >> 10, len >> 10, codek, datak);
}

#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
	free_reserved_area(start, end, 0, "initrd");
}
#endif

void __init free_initmem(void)
{
	free_initmem_default(0);
}
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>
	14	#include <linux/bootmem.h>
	15	#ifdef CONFIG_BLK_DEV_RAM
	16	#include <linux/blkdev.h>
	17	#endif
	18	#include <linux/initrd.h>
	19
	20	#include <asm/sections.h>
	21
	22	/*
	23	* ZERO_PAGE is a special page that is used for zero-initialized
	24	* data and COW.
	25	*/
	26	unsigned long empty_zero_page;
	27	EXPORT_SYMBOL(empty_zero_page);
	28
	29	/*
	30	* paging_init() continues the virtual memory environment setup which
	31	* was begun by the code in arch/head.S.
	32	* The parameters are pointers to where to stick the starting and ending
	33	* addresses of available kernel virtual memory.
	34	*/
	35	void __init paging_init(void)
	36	{
	37	struct pglist_data *pgdat = NODE_DATA(0);
	38	unsigned long zones_size[MAX_NR_ZONES] = {0, };
	39
	40	empty_zero_page = (unsigned long) alloc_bootmem_pages(PAGE_SIZE);
	41	memset((void *)empty_zero_page, 0, PAGE_SIZE);
	42
	43	/*
	44	* Set up user data space
	45	*/
	46	set_fs(KERNEL_DS);
	47
	48	/*
	49	* Define zones
	50	*/
	51	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
	52	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
	53	__pa(PAGE_OFFSET) >> PAGE_SHIFT;
	54
	55	free_area_init(zones_size);
	56	}
	57
	58	void __init mem_init(void)
	59	{
	60	int codek, datak;
	61	unsigned long tmp;
	62	unsigned long len = memory_end - memory_start;
	63
	64	high_memory = (void *)(memory_end & PAGE_MASK);
65
66	/* this will put all memory onto the freelists */
67	totalram_pages = free_all_bootmem();
68
69	codek = (_etext - _stext) >> 10;
70	datak = (_end - _sdata) >> 10;
71
72	tmp = nr_free_pages() << PAGE_SHIFT;
73	printk(KERN_INFO "Memory: %luk/%luk RAM (%dk kernel code, %dk data)\n",
74	tmp >> 10, len >> 10, codek, datak);
75	}
76
77	#ifdef CONFIG_BLK_DEV_INITRD
78	void __init free_initrd_mem(unsigned long start, unsigned long end)
79	{
95a259ed	80	free_reserved_area(start, end, 0, "initrd");
14aa7e8b AJ	81	}
	82	#endif
	83
	84	void __init free_initmem(void)
	85	{
95a259ed	86	free_initmem_default(0);
14aa7e8b	87	}