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

// SPDX-License-Identifier: GPL-2.0-only
/*
 *  Port on Texas Instruments TMS320C6x architecture
 *
 *  Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
 *  Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
 */
#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);
}
Commit	Line	Data
d2912cb1	1	// SPDX-License-Identifier: GPL-2.0-only
14aa7e8b AJ	2	/*
	3	* Port on Texas Instruments TMS320C6x architecture
	4	*
	5	* Copyright (C) 2004, 2009, 2010, 2011 Texas Instruments Incorporated
	6	* Author: Aurelien Jacquiot (aurelien.jacquiot@jaluna.com)
14aa7e8b AJ	7	*/
	8	#include <linux/mm.h>
	9	#include <linux/swap.h>
	10	#include <linux/module.h>
57c8a661	11	#include <linux/memblock.h>
14aa7e8b AJ	12	#ifdef CONFIG_BLK_DEV_RAM
	13	#include <linux/blkdev.h>
	14	#endif
	15	#include <linux/initrd.h>
	16
	17	#include <asm/sections.h>
7c0f6ba6	18	#include <linux/uaccess.h>
14aa7e8b AJ	19
	20	/*
	21	* ZERO_PAGE is a special page that is used for zero-initialized
	22	* data and COW.
	23	*/
	24	unsigned long empty_zero_page;
	25	EXPORT_SYMBOL(empty_zero_page);
	26
	27	/*
	28	* paging_init() continues the virtual memory environment setup which
	29	* was begun by the code in arch/head.S.
	30	* The parameters are pointers to where to stick the starting and ending
	31	* addresses of available kernel virtual memory.
	32	*/
	33	void __init paging_init(void)
	34	{
	35	struct pglist_data *pgdat = NODE_DATA(0);
	36	unsigned long zones_size[MAX_NR_ZONES] = {0, };
	37
15c3c114 MR	38	empty_zero_page = (unsigned long) memblock_alloc(PAGE_SIZE,
15c3c114 MR	39	PAGE_SIZE);
8a7f97b9 MR	40	if (!empty_zero_page)
	41	panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
	42	__func__, PAGE_SIZE, PAGE_SIZE);
14aa7e8b AJ	43
	44	/*
	45	* Set up user data space
	46	*/
	47	set_fs(KERNEL_DS);
	48
	49	/*
	50	* Define zones
	51	*/
	52	zones_size[ZONE_NORMAL] = (memory_end - PAGE_OFFSET) >> PAGE_SHIFT;
	53	pgdat->node_zones[ZONE_NORMAL].zone_start_pfn =
	54	__pa(PAGE_OFFSET) >> PAGE_SHIFT;
	55
	56	free_area_init(zones_size);
	57	}
	58
	59	void __init mem_init(void)
	60	{
14aa7e8b AJ	61	high_memory = (void *)(memory_end & PAGE_MASK);
	62
	63	/* this will put all memory onto the freelists */
c6ffc5ca	64	memblock_free_all();
14aa7e8b	65
02f55324	66	mem_init_print_info(NULL);
14aa7e8b	67	}