[mirror_ubuntu-focal-kernel.git] / arch / m32r / mm / discontig.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  linux/arch/m32r/mm/discontig.c
 *
 *  Discontig memory support
 *
 *  Copyright (c) 2003  Hitoshi Yamamoto
 */

#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/mmzone.h>
#include <linux/initrd.h>
#include <linux/nodemask.h>
#include <linux/module.h>
#include <linux/pfn.h>

#include <asm/setup.h>

extern char _end[];

struct pglist_data *node_data[MAX_NUMNODES];
EXPORT_SYMBOL(node_data);

pg_data_t m32r_node_data[MAX_NUMNODES];

/* Memory profile */
typedef struct {
	unsigned long start_pfn;
	unsigned long pages;
	unsigned long holes;
	unsigned long free_pfn;
} mem_prof_t;
static mem_prof_t mem_prof[MAX_NUMNODES];

extern unsigned long memory_start;
extern unsigned long memory_end;

static void __init mem_prof_init(void)
{
	unsigned long start_pfn, holes, free_pfn;
	const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
	unsigned long ul;
	mem_prof_t *mp;

	/* Node#0 SDRAM */
	mp = &mem_prof[0];
	mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
	mp->pages = PFN_DOWN(memory_end - memory_start);
	mp->holes = 0;
	mp->free_pfn = PFN_UP(__pa(_end));

	/* Node#1 internal SRAM */
	mp = &mem_prof[1];
	start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
	holes = 0;
	if (start_pfn & (zone_alignment - 1)) {
		ul = zone_alignment;
		while (start_pfn >= ul)
			ul += zone_alignment;

		start_pfn = ul - zone_alignment;
		holes = free_pfn - start_pfn;
	}

	mp->start_pfn = start_pfn;
	mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
	mp->holes = holes;
	mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
}

unsigned long __init setup_memory(void)
{
	unsigned long bootmap_size;
	unsigned long min_pfn;
	int nid;
	mem_prof_t *mp;

	max_low_pfn = 0;
	min_low_pfn = -1;

	mem_prof_init();

	for_each_online_node(nid) {
		mp = &mem_prof[nid];
		NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
		NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
		min_pfn = mp->start_pfn;
		max_pfn = mp->start_pfn + mp->pages;
		bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
			mp->start_pfn, max_pfn);

		free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
			PFN_PHYS(mp->pages));

		reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
			PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
			BOOTMEM_DEFAULT);

		if (max_low_pfn < max_pfn)
			max_low_pfn = max_pfn;

		if (min_low_pfn > min_pfn)
			min_low_pfn = min_pfn;
	}

#ifdef CONFIG_BLK_DEV_INITRD
	if (LOADER_TYPE && INITRD_START) {
		if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
			reserve_bootmem_node(NODE_DATA(0), INITRD_START,
				INITRD_SIZE, BOOTMEM_DEFAULT);
			initrd_start = INITRD_START + PAGE_OFFSET;
			initrd_end = initrd_start + INITRD_SIZE;
			printk("initrd:start[%08lx],size[%08lx]\n",
				initrd_start, INITRD_SIZE);
		} else {
			printk("initrd extends beyond end of memory "
				"(0x%08lx > 0x%08llx)\ndisabling initrd\n",
				INITRD_START + INITRD_SIZE,
			        (unsigned long long)PFN_PHYS(max_low_pfn));

			initrd_start = 0;
		}
	}
#endif	/* CONFIG_BLK_DEV_INITRD */

	return max_low_pfn;
}

#define START_PFN(nid)		(NODE_DATA(nid)->bdata->node_min_pfn)
#define MAX_LOW_PFN(nid)	(NODE_DATA(nid)->bdata->node_low_pfn)

void __init zone_sizes_init(void)
{
	unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
	unsigned long low, start_pfn;
	int nid, i;
	mem_prof_t *mp;

	for_each_online_node(nid) {
		mp = &mem_prof[nid];
		for (i = 0 ; i < MAX_NR_ZONES ; i++) {
			zones_size[i] = 0;
			zholes_size[i] = 0;
		}
		start_pfn = START_PFN(nid);
		low = MAX_LOW_PFN(nid);
		zones_size[ZONE_DMA] = low - start_pfn;
		zholes_size[ZONE_DMA] = mp->holes;

		node_set_state(nid, N_NORMAL_MEMORY);
		free_area_init_node(nid, zones_size, start_pfn, zholes_size);
	}

	/*
	 * For test
	 *  Use all area of internal RAM.
	 *  see __alloc_pages()
	 */
	NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
	NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
	NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
1da177e4 LT	2	/*
	3	* linux/arch/m32r/mm/discontig.c
	4	*
	5	* Discontig memory support
	6	*
	7	* Copyright (c) 2003 Hitoshi Yamamoto
	8	*/
	9
1da177e4 LT	10	#include <linux/mm.h>
	11	#include <linux/bootmem.h>
	12	#include <linux/mmzone.h>
	13	#include <linux/initrd.h>
	14	#include <linux/nodemask.h>
eaaece26	15	#include <linux/module.h>
22a9835c	16	#include <linux/pfn.h>
1da177e4 LT	17
	18	#include <asm/setup.h>
	19
	20	extern char _end[];
	21
	22	struct pglist_data *node_data[MAX_NUMNODES];
eaaece26	23	EXPORT_SYMBOL(node_data);
1da177e4 LT	24
	25	pg_data_t m32r_node_data[MAX_NUMNODES];
	26
	27	/* Memory profile */
	28	typedef struct {
	29	unsigned long start_pfn;
	30	unsigned long pages;
	31	unsigned long holes;
	32	unsigned long free_pfn;
	33	} mem_prof_t;
	34	static mem_prof_t mem_prof[MAX_NUMNODES];
	35
6b6fabce HT	36	extern unsigned long memory_start;
	37	extern unsigned long memory_end;
	38
1da177e4 LT	39	static void __init mem_prof_init(void)
	40	{
	41	unsigned long start_pfn, holes, free_pfn;
	42	const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
	43	unsigned long ul;
	44	mem_prof_t *mp;
	45
	46	/* Node#0 SDRAM */
	47	mp = &mem_prof[0];
	48	mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
6b6fabce	49	mp->pages = PFN_DOWN(memory_end - memory_start);
1da177e4 LT	50	mp->holes = 0;
	51	mp->free_pfn = PFN_UP(__pa(_end));
	52
	53	/* Node#1 internal SRAM */
	54	mp = &mem_prof[1];
	55	start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
	56	holes = 0;
	57	if (start_pfn & (zone_alignment - 1)) {
	58	ul = zone_alignment;
	59	while (start_pfn >= ul)
	60	ul += zone_alignment;
	61
	62	start_pfn = ul - zone_alignment;
	63	holes = free_pfn - start_pfn;
	64	}
	65
	66	mp->start_pfn = start_pfn;
	67	mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
	68	mp->holes = holes;
	69	mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
	70	}
	71
	72	unsigned long __init setup_memory(void)
	73	{
	74	unsigned long bootmap_size;
	75	unsigned long min_pfn;
	76	int nid;
	77	mem_prof_t *mp;
	78
	79	max_low_pfn = 0;
	80	min_low_pfn = -1;
	81
	82	mem_prof_init();
	83
	84	for_each_online_node(nid) {
	85	mp = &mem_prof[nid];
	86	NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
b61bfa3c	87	NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
1da177e4 LT	88	min_pfn = mp->start_pfn;
	89	max_pfn = mp->start_pfn + mp->pages;
	90	bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
	91	mp->start_pfn, max_pfn);
	92
	93	free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
	94	PFN_PHYS(mp->pages));
	95
	96	reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
72a7fe39 BW	97	PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
72a7fe39 BW	98	BOOTMEM_DEFAULT);
1da177e4 LT	99
	100	if (max_low_pfn < max_pfn)
	101	max_low_pfn = max_pfn;
	102
	103	if (min_low_pfn > min_pfn)
	104	min_low_pfn = min_pfn;
	105	}
	106
	107	#ifdef CONFIG_BLK_DEV_INITRD
	108	if (LOADER_TYPE && INITRD_START) {
	109	if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
	110	reserve_bootmem_node(NODE_DATA(0), INITRD_START,
72a7fe39	111	INITRD_SIZE, BOOTMEM_DEFAULT);
19e5d9c0	112	initrd_start = INITRD_START + PAGE_OFFSET;
1da177e4 LT	113	initrd_end = initrd_start + INITRD_SIZE;
	114	printk("initrd:start[%08lx],size[%08lx]\n",
	115	initrd_start, INITRD_SIZE);
	116	} else {
	117	printk("initrd extends beyond end of memory "
947d0496	118	"(0x%08lx > 0x%08llx)\ndisabling initrd\n",
1da177e4	119	INITRD_START + INITRD_SIZE,
947d0496	120	(unsigned long long)PFN_PHYS(max_low_pfn));
1da177e4 LT	121
	122	initrd_start = 0;
	123	}
	124	}
	125	#endif /* CONFIG_BLK_DEV_INITRD */
	126
	127	return max_low_pfn;
	128	}
	129
3560e249	130	#define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn)
1da177e4 LT	131	#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
1da177e4 LT	132
a0e7b805	133	void __init zone_sizes_init(void)
1da177e4 LT	134	{
	135	unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
	136	unsigned long low, start_pfn;
1da177e4 LT	137	int nid, i;
	138	mem_prof_t *mp;
	139
1da177e4 LT	140	for_each_online_node(nid) {
	141	mp = &mem_prof[nid];
	142	for (i = 0 ; i < MAX_NR_ZONES ; i++) {
	143	zones_size[i] = 0;
	144	zholes_size[i] = 0;
	145	}
	146	start_pfn = START_PFN(nid);
	147	low = MAX_LOW_PFN(nid);
	148	zones_size[ZONE_DMA] = low - start_pfn;
	149	zholes_size[ZONE_DMA] = mp->holes;
1da177e4	150
0091a47d	151	node_set_state(nid, N_NORMAL_MEMORY);
9109fb7b	152	free_area_init_node(nid, zones_size, start_pfn, zholes_size);
1da177e4 LT	153	}
	154
	155	/*
	156	* For test
	157	* Use all area of internal RAM.
	158	* see __alloc_pages()
	159	*/
41858966 MG	160	NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
	161	NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
	162	NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;
1da177e4	163	}