projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| c438b58e JH |
1 | /* |
| 2 | * Multiple memory node support for Meta machines | |
| 3 | * | |
| 4 | * Copyright (C) 2007 Paul Mundt | |
| 5 | * Copyright (C) 2010 Imagination Technologies Ltd. | |
| 6 | * | |
| 7 | * This file is subject to the terms and conditions of the GNU General Public | |
| 8 | * License. See the file "COPYING" in the main directory of this archive | |
| 9 | * for more details. | |
| 10 | */ | |
| 11 | #include <linux/export.h> | |
| 12 | #include <linux/bootmem.h> | |
| 13 | #include <linux/memblock.h> | |
| 14 | #include <linux/mm.h> | |
| 15 | #include <linux/numa.h> | |
| 16 | #include <linux/pfn.h> | |
| 17 | #include <asm/sections.h> | |
| 18 | ||
| 19 | struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; | |
| 20 | EXPORT_SYMBOL_GPL(node_data); | |
| 21 | ||
| 22 | extern char _heap_start[]; | |
| 23 | ||
| 24 | /* | |
| 25 | * On Meta machines the conventional approach is to stash system RAM | |
| 26 | * in node 0, and other memory blocks in to node 1 and up, ordered by | |
| 27 | * latency. Each node's pgdat is node-local at the beginning of the node, | |
| 28 | * immediately followed by the node mem map. | |
| 29 | */ | |
| 30 | void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) | |
| 31 | { | |
| 32 | unsigned long bootmap_pages, bootmem_paddr; | |
| 33 | unsigned long start_pfn, end_pfn; | |
| 34 | unsigned long pgdat_paddr; | |
| 35 | ||
| 36 | /* Don't allow bogus node assignment */ | |
| 37 | BUG_ON(nid > MAX_NUMNODES || nid <= 0); | |
| 38 | ||
| 39 | start_pfn = start >> PAGE_SHIFT; | |
| 40 | end_pfn = end >> PAGE_SHIFT; | |
| 41 | ||
| 42 | memblock_add(start, end - start); | |
| 43 | ||
| 44 | memblock_set_node(PFN_PHYS(start_pfn), | |
| 45 | PFN_PHYS(end_pfn - start_pfn), nid); | |
| 46 | ||
| 47 | /* Node-local pgdat */ | |
| 48 | pgdat_paddr = memblock_alloc_base(sizeof(struct pglist_data), | |
| 49 | SMP_CACHE_BYTES, end); | |
| 50 | NODE_DATA(nid) = __va(pgdat_paddr); | |
| 51 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
| 52 | ||
| 53 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; | |
| 54 | NODE_DATA(nid)->node_start_pfn = start_pfn; | |
| 55 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
| 56 | ||
| 57 | /* Node-local bootmap */ | |
| 58 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); | |
| 59 | bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, | |
| 60 | PAGE_SIZE, end); | |
| 61 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, | |
| 62 | start_pfn, end_pfn); | |
| 63 | ||
| 64 | free_bootmem_with_active_regions(nid, end_pfn); | |
| 65 | ||
| 66 | /* Reserve the pgdat and bootmap space with the bootmem allocator */ | |
| 67 | reserve_bootmem_node(NODE_DATA(nid), pgdat_paddr & PAGE_MASK, | |
| 68 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); | |
| 69 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, | |
| 70 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); | |
| 71 | ||
| 72 | /* It's up */ | |
| 73 | node_set_online(nid); | |
| 74 | ||
| 75 | /* Kick sparsemem */ | |
| 76 | sparse_memory_present_with_active_regions(nid); | |
| 77 | } | |
| 78 | ||
| 79 | void __init __weak soc_mem_setup(void) | |
| 80 | { | |
| 81 | } |