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Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

[/] [or1k_soc_on_altera_embedded_dev_kit/] [trunk/] [linux-2.6/] [linux-2.6.24/] [arch/] [x86/] [kernel/] [numaq_32.c] - Blame information for rev 3

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Line No. Rev Author Line
1 3 xianfeng 
/*
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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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#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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