[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / arch / parisc / include / asm / mmzone.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _PARISC_MMZONE_H
#define _PARISC_MMZONE_H

#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */

#ifdef CONFIG_DISCONTIGMEM

extern int npmem_ranges;

struct node_map_data {
    pg_data_t pg_data;
};

extern struct node_map_data node_data[];

#define NODE_DATA(nid)          (&node_data[nid].pg_data)

/* We have these possible memory map layouts:
 * Astro: 0-3.75, 67.75-68, 4-64
 * zx1: 0-1, 257-260, 4-256
 * Stretch (N-class): 0-2, 4-32, 34-xxx
 */

/* Since each 1GB can only belong to one region (node), we can create
 * an index table for pfn to nid lookup; each entry in pfnnid_map 
 * represents 1GB, and contains the node that the memory belongs to. */

#define PFNNID_SHIFT (30 - PAGE_SHIFT)
#define PFNNID_MAP_MAX  512     /* support 512GB */
extern signed char pfnnid_map[PFNNID_MAP_MAX];

#ifndef CONFIG_64BIT
#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
#else
/* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */
#define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT))
#endif

static inline int pfn_to_nid(unsigned long pfn)
{
	unsigned int i;

	if (unlikely(pfn_is_io(pfn)))
		return 0;

	i = pfn >> PFNNID_SHIFT;
	BUG_ON(i >= ARRAY_SIZE(pfnnid_map));

	return pfnnid_map[i];
}

static inline int pfn_valid(int pfn)
{
	int nid = pfn_to_nid(pfn);

	if (nid >= 0)
		return (pfn < node_end_pfn(nid));
	return 0;
}

#endif
#endif /* _PARISC_MMZONE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _PARISC_MMZONE_H
	3	#define _PARISC_MMZONE_H
	4
872420b3 JDA	5	#define MAX_PHYSMEM_RANGES 8 /* Fix the size for now (current known max is 3) */
872420b3 JDA	6
1da177e4 LT	7	#ifdef CONFIG_DISCONTIGMEM
1da177e4 LT	8
1da177e4 LT	9	extern int npmem_ranges;
	10
	11	struct node_map_data {
	12	pg_data_t pg_data;
	13	};
	14
	15	extern struct node_map_data node_data[];
	16
	17	#define NODE_DATA(nid) (&node_data[nid].pg_data)
	18
1da177e4 LT	19	/* We have these possible memory map layouts:
	20	* Astro: 0-3.75, 67.75-68, 4-64
	21	* zx1: 0-1, 257-260, 4-256
	22	* Stretch (N-class): 0-2, 4-32, 34-xxx
	23	*/
	24
	25	/* Since each 1GB can only belong to one region (node), we can create
	26	* an index table for pfn to nid lookup; each entry in pfnnid_map
	27	* represents 1GB, and contains the node that the memory belongs to. */
	28
	29	#define PFNNID_SHIFT (30 - PAGE_SHIFT)
	30	#define PFNNID_MAP_MAX 512 /* support 512GB */
91ea8207	31	extern signed char pfnnid_map[PFNNID_MAP_MAX];
1da177e4	32
513e7ecd	33	#ifndef CONFIG_64BIT
1da177e4 LT	34	#define pfn_is_io(pfn) ((pfn & (0xf0000000UL >> PAGE_SHIFT)) == (0xf0000000UL >> PAGE_SHIFT))
	35	#else
	36	/* io can be 0xf0f0f0f0f0xxxxxx or 0xfffffffff0000000 */
	37	#define pfn_is_io(pfn) ((pfn & (0xf000000000000000UL >> PAGE_SHIFT)) == (0xf000000000000000UL >> PAGE_SHIFT))
	38	#endif
	39
	40	static inline int pfn_to_nid(unsigned long pfn)
	41	{
	42	unsigned int i;
1da177e4 LT	43
	44	if (unlikely(pfn_is_io(pfn)))
	45	return 0;
	46
	47	i = pfn >> PFNNID_SHIFT;
1dda59b4	48	BUG_ON(i >= ARRAY_SIZE(pfnnid_map));
1da177e4	49
91ea8207	50	return pfnnid_map[i];
1da177e4 LT	51	}
	52
	53	static inline int pfn_valid(int pfn)
	54	{
	55	int nid = pfn_to_nid(pfn);
	56
	57	if (nid >= 0)
	58	return (pfn < node_end_pfn(nid));
	59	return 0;
	60	}
	61
1da177e4 LT	62	#endif
1da177e4 LT	63	#endif /* _PARISC_MMZONE_H */