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