294 lines
7.4 KiB
C
294 lines
7.4 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/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/genapic.h>
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#include <asm/e820.h>
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#include <asm/setup.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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void __cpuinit numaq_tsc_disable(void)
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{
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if (!found_numaq)
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return;
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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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}
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static int __init numaq_pre_time_init(void)
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{
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numaq_tsc_disable();
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return 0;
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}
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int found_numaq;
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/*
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* Have to match translation table entries to main table entries by counter
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* hence the mpc_record variable .... can't see a less disgusting way of
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* doing this ....
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*/
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struct mpc_config_translation {
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unsigned char mpc_type;
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unsigned char trans_len;
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unsigned char trans_type;
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unsigned char trans_quad;
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unsigned char trans_global;
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unsigned char trans_local;
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unsigned short trans_reserved;
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};
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/* x86_quirks member */
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static int mpc_record;
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static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
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__cpuinitdata;
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static inline int generate_logical_apicid(int quad, int phys_apicid)
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{
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return (quad << 4) + (phys_apicid ? phys_apicid << 1 : 1);
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}
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/* x86_quirks member */
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static int mpc_apic_id(struct mpc_cpu *m)
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{
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int quad = translation_table[mpc_record]->trans_quad;
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int logical_apicid = generate_logical_apicid(quad, m->apicid);
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printk(KERN_DEBUG "Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n",
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m->apicid, (m->cpufeature & CPU_FAMILY_MASK) >> 8,
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(m->cpufeature & CPU_MODEL_MASK) >> 4,
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m->apicver, quad, logical_apicid);
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return logical_apicid;
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}
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int mp_bus_id_to_node[MAX_MP_BUSSES];
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int mp_bus_id_to_local[MAX_MP_BUSSES];
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/* x86_quirks member */
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static void mpc_oem_bus_info(struct mpc_bus *m, char *name)
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{
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int quad = translation_table[mpc_record]->trans_quad;
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int local = translation_table[mpc_record]->trans_local;
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mp_bus_id_to_node[m->busid] = quad;
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mp_bus_id_to_local[m->busid] = local;
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printk(KERN_INFO "Bus #%d is %s (node %d)\n",
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m->busid, name, quad);
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}
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int quad_local_to_mp_bus_id [NR_CPUS/4][4];
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/* x86_quirks member */
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static void mpc_oem_pci_bus(struct mpc_bus *m)
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{
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int quad = translation_table[mpc_record]->trans_quad;
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int local = translation_table[mpc_record]->trans_local;
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quad_local_to_mp_bus_id[quad][local] = m->busid;
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}
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static void __init MP_translation_info(struct mpc_config_translation *m)
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{
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printk(KERN_INFO
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"Translation: record %d, type %d, quad %d, global %d, local %d\n",
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mpc_record, m->trans_type, m->trans_quad, m->trans_global,
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m->trans_local);
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if (mpc_record >= MAX_MPC_ENTRY)
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printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
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else
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translation_table[mpc_record] = m; /* stash this for later */
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if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
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node_set_online(m->trans_quad);
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}
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static int __init mpf_checksum(unsigned char *mp, int len)
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{
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int sum = 0;
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while (len--)
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sum += *mp++;
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return sum & 0xFF;
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}
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/*
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* Read/parse the MPC oem tables
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*/
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static void __init smp_read_mpc_oem(struct mpc_oemtable *oemtable,
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unsigned short oemsize)
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{
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int count = sizeof(*oemtable); /* the header size */
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unsigned char *oemptr = ((unsigned char *)oemtable) + count;
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mpc_record = 0;
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printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n",
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oemtable);
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if (memcmp(oemtable->signature, MPC_OEM_SIGNATURE, 4)) {
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printk(KERN_WARNING
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"SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
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oemtable->signature[0], oemtable->signature[1],
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oemtable->signature[2], oemtable->signature[3]);
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return;
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}
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if (mpf_checksum((unsigned char *)oemtable, oemtable->length)) {
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printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
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return;
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}
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while (count < oemtable->length) {
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switch (*oemptr) {
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case MP_TRANSLATION:
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{
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struct mpc_config_translation *m =
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(struct mpc_config_translation *)oemptr;
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MP_translation_info(m);
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oemptr += sizeof(*m);
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count += sizeof(*m);
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++mpc_record;
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break;
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}
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default:
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{
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printk(KERN_WARNING
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"Unrecognised OEM table entry type! - %d\n",
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(int)*oemptr);
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return;
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}
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}
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}
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}
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static int __init numaq_setup_ioapic_ids(void)
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{
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/* so can skip it */
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return 1;
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}
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static int __init numaq_update_genapic(void)
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{
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apic->wakeup_cpu = wakeup_secondary_cpu_via_nmi;
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return 0;
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}
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static struct x86_quirks numaq_x86_quirks __initdata = {
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.arch_pre_time_init = numaq_pre_time_init,
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.arch_time_init = NULL,
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.arch_pre_intr_init = NULL,
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.arch_memory_setup = NULL,
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.arch_intr_init = NULL,
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.arch_trap_init = NULL,
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.mach_get_smp_config = NULL,
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.mach_find_smp_config = NULL,
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.mpc_record = &mpc_record,
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.mpc_apic_id = mpc_apic_id,
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.mpc_oem_bus_info = mpc_oem_bus_info,
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.mpc_oem_pci_bus = mpc_oem_pci_bus,
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.smp_read_mpc_oem = smp_read_mpc_oem,
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.setup_ioapic_ids = numaq_setup_ioapic_ids,
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.update_genapic = numaq_update_genapic,
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};
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void numaq_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
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{
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if (strncmp(oem, "IBM NUMA", 8))
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printk("Warning! Not a NUMA-Q system!\n");
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else
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found_numaq = 1;
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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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if (found_numaq)
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x86_quirks = &numaq_x86_quirks;
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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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