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[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [kernel/] [numaq_32.c] - Rev 3
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/* * Written by: Patricia Gaughen, IBM Corporation * * Copyright (C) 2002, IBM Corp. * * All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * Send feedback to <gone@us.ibm.com> */ #include <linux/mm.h> #include <linux/bootmem.h> #include <linux/mmzone.h> #include <linux/module.h> #include <linux/nodemask.h> #include <asm/numaq.h> #include <asm/topology.h> #include <asm/processor.h> #define MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT)) /* * Function: smp_dump_qct() * * Description: gets memory layout from the quad config table. This * function also updates node_online_map with the nodes (quads) present. */ static void __init smp_dump_qct(void) { int node; struct eachquadmem *eq; struct sys_cfg_data *scd = (struct sys_cfg_data *)__va(SYS_CFG_DATA_PRIV_ADDR); nodes_clear(node_online_map); for_each_node(node) { if (scd->quads_present31_0 & (1 << node)) { node_set_online(node); eq = &scd->eq[node]; /* Convert to pages */ node_start_pfn[node] = MB_TO_PAGES( eq->hi_shrd_mem_start - eq->priv_mem_size); node_end_pfn[node] = MB_TO_PAGES( eq->hi_shrd_mem_start + eq->hi_shrd_mem_size); memory_present(node, node_start_pfn[node], node_end_pfn[node]); node_remap_size[node] = node_memmap_size_bytes(node, node_start_pfn[node], node_end_pfn[node]); } } } /* * Unlike Summit, we don't really care to let the NUMA-Q * fall back to flat mode. Don't compile for NUMA-Q * unless you really need it! */ int __init get_memcfg_numaq(void) { smp_dump_qct(); return 1; } static int __init numaq_tsc_disable(void) { if (num_online_nodes() > 1) { printk(KERN_DEBUG "NUMAQ: disabling TSC\n"); tsc_disable = 1; } return 0; } arch_initcall(numaq_tsc_disable);