diff options
Diffstat (limited to 'arch/i386/kernel/numaq_32.c')
| -rw-r--r-- | arch/i386/kernel/numaq_32.c | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/i386/kernel/numaq_32.c b/arch/i386/kernel/numaq_32.c new file mode 100644 index 00000000000..9000d82c6dc --- /dev/null +++ b/arch/i386/kernel/numaq_32.c @@ -0,0 +1,89 @@ +/* + * 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); |