/* * Multiple memory node support for Meta machines * * Copyright (C) 2007 Paul Mundt * Copyright (C) 2010 Imagination Technologies Ltd. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include <linux/export.h> #include <linux/bootmem.h> #include <linux/memblock.h> #include <linux/mm.h> #include <linux/numa.h> #include <linux/pfn.h> #include <asm/sections.h> struct pglist_data *node_data[MAX_NUMNODES] __read_mostly; EXPORT_SYMBOL_GPL(node_data); extern char _heap_start[]; /* * On Meta machines the conventional approach is to stash system RAM * in node 0, and other memory blocks in to node 1 and up, ordered by * latency. Each node's pgdat is node-local at the beginning of the node, * immediately followed by the node mem map. */ void __init setup_bootmem_node(int nid, unsigned long start, unsigned long end) { unsigned long bootmap_pages, bootmem_paddr; unsigned long start_pfn, end_pfn; unsigned long pgdat_paddr; /* Don't allow bogus node assignment */ BUG_ON(nid >= MAX_NUMNODES || nid <= 0); start_pfn = start >> PAGE_SHIFT; end_pfn = end >> PAGE_SHIFT; memblock_add(start, end - start); memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), &memblock.memory, nid); /* Node-local pgdat */ pgdat_paddr = memblock_alloc_base(sizeof(struct pglist_data), SMP_CACHE_BYTES, end); NODE_DATA(nid) = __va(pgdat_paddr); memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; NODE_DATA(nid)->node_start_pfn = start_pfn; NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; /* Node-local bootmap */ bootmap_pages = bootmem_bootmap_pages(end_pfn - start_pfn); bootmem_paddr = memblock_alloc_base(bootmap_pages << PAGE_SHIFT, PAGE_SIZE, end); init_bootmem_node(NODE_DATA(nid), bootmem_paddr >> PAGE_SHIFT, start_pfn, end_pfn); free_bootmem_with_active_regions(nid, end_pfn); /* Reserve the pgdat and bootmap space with the bootmem allocator */ reserve_bootmem_node(NODE_DATA(nid), pgdat_paddr & PAGE_MASK, sizeof(struct pglist_data), BOOTMEM_DEFAULT); reserve_bootmem_node(NODE_DATA(nid), bootmem_paddr, bootmap_pages << PAGE_SHIFT, BOOTMEM_DEFAULT); /* It's up */ node_set_online(nid); /* Kick sparsemem */ sparse_memory_present_with_active_regions(nid); } void __init __weak soc_mem_setup(void) { }