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d49c428840
... so it could fall back to normal numa and we'd reduce the impact of the NUMAQ subarch. NUMAQ depends on GENERICARCH also decouple genericarch numa from acpi. also make it fall back to bigsmp if apicid > 8. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
105 lines
2.7 KiB
C
105 lines
2.7 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/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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#include <asm/mpspec.h>
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#include <asm/e820.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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e820_register_active_regions(node, node_start_pfn[node],
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node_end_pfn[node]);
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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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static __init void early_check_numaq(void)
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{
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/*
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* Find possible boot-time SMP configuration:
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*/
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early_find_smp_config();
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/*
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* get boot-time SMP configuration:
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*/
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if (smp_found_config)
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early_get_smp_config();
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}
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int __init get_memcfg_numaq(void)
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{
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early_check_numaq();
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if (!found_numaq)
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return 0;
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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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setup_clear_cpu_cap(X86_FEATURE_TSC);
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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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