James Hogan | c438b58 | 2012-10-09 10:54:17 +0100 | [diff] [blame] | 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 */ |
Dan Carpenter | 5138730 | 2013-11-08 12:45:33 +0300 | [diff] [blame] | 37 | BUG_ON(nid >= MAX_NUMNODES || nid <= 0); |
James Hogan | c438b58 | 2012-10-09 10:54:17 +0100 | [diff] [blame] | 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), |
Tang Chen | e7e8de5 | 2014-01-21 15:49:26 -0800 | [diff] [blame] | 45 | PFN_PHYS(end_pfn - start_pfn), |
| 46 | &memblock.memory, nid); |
James Hogan | c438b58 | 2012-10-09 10:54:17 +0100 | [diff] [blame] | 47 | |
| 48 | /* Node-local pgdat */ |
| 49 | pgdat_paddr = memblock_alloc_base(sizeof(struct pglist_data), |
| 50 | SMP_CACHE_BYTES, end); |
| 51 | NODE_DATA(nid) = __va(pgdat_paddr); |
| 52 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); |
| 53 | |
| 54 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; |
| 55 | NODE_DATA(nid)->node_start_pfn = start_pfn; |
| 56 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; |
| 57 | |
| 58 | /* Node-local bootmap */ |
| 59 | bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); |
| 60 | bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, |
| 61 | PAGE_SIZE, end); |
| 62 | init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, |
| 63 | start_pfn, end_pfn); |
| 64 | |
| 65 | free_bootmem_with_active_regions(nid, end_pfn); |
| 66 | |
| 67 | /* Reserve the pgdat and bootmap space with the bootmem allocator */ |
| 68 | reserve_bootmem_node(NODE_DATA(nid), pgdat_paddr & PAGE_MASK, |
| 69 | sizeof(struct pglist_data), BOOTMEM_DEFAULT); |
| 70 | reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, |
| 71 | bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); |
| 72 | |
| 73 | /* It's up */ |
| 74 | node_set_online(nid); |
| 75 | |
| 76 | /* Kick sparsemem */ |
| 77 | sparse_memory_present_with_active_regions(nid); |
| 78 | } |
| 79 | |
| 80 | void __init __weak soc_mem_setup(void) |
| 81 | { |
| 82 | } |