2 * Written by: Patricia Gaughen, IBM Corporation
4 * Copyright (C) 2002, IBM Corp.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
16 * NON INFRINGEMENT. See the GNU General Public License for more
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Send feedback to <gone@us.ibm.com>
27 #include <linux/bootmem.h>
28 #include <linux/mmzone.h>
29 #include <linux/module.h>
30 #include <linux/nodemask.h>
31 #include <asm/numaq.h>
32 #include <asm/topology.h>
33 #include <asm/processor.h>
34 #include <asm/mpspec.h>
37 #define MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT))
40 * Function: smp_dump_qct()
42 * Description: gets memory layout from the quad config table. This
43 * function also updates node_online_map with the nodes (quads) present.
45 static void __init
smp_dump_qct(void)
48 struct eachquadmem
*eq
;
49 struct sys_cfg_data
*scd
=
50 (struct sys_cfg_data
*)__va(SYS_CFG_DATA_PRIV_ADDR
);
52 nodes_clear(node_online_map
);
54 if (scd
->quads_present31_0
& (1 << node
)) {
55 node_set_online(node
);
57 /* Convert to pages */
58 node_start_pfn
[node
] = MB_TO_PAGES(
59 eq
->hi_shrd_mem_start
- eq
->priv_mem_size
);
60 node_end_pfn
[node
] = MB_TO_PAGES(
61 eq
->hi_shrd_mem_start
+ eq
->hi_shrd_mem_size
);
63 e820_register_active_regions(node
, node_start_pfn
[node
],
66 node_start_pfn
[node
], node_end_pfn
[node
]);
67 node_remap_size
[node
] = node_memmap_size_bytes(node
,
74 static __init
void early_check_numaq(void)
77 * Find possible boot-time SMP configuration:
79 early_find_smp_config();
81 * get boot-time SMP configuration:
84 early_get_smp_config();
87 int __init
get_memcfg_numaq(void)
96 void __init
numaq_tsc_disable(void)
101 if (num_online_nodes() > 1) {
102 printk(KERN_DEBUG
"NUMAQ: disabling TSC\n");
103 setup_clear_cpu_cap(X86_FEATURE_TSC
);
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