| /* 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 */ |
