arch/x86/kernel/numaq_32.c

   1 /*
   2  * Written by: Patricia Gaughen, IBM Corporation
   3  *
   4  * Copyright (C) 2002, IBM Corp.
   5  *
   6  * All rights reserved.
   7  *
   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.
  12  *
  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
  17  * details.
  18  *
  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.
  22  *
  23  * Send feedback to <gone@us.ibm.com>
  24  */
  25
  26 #include <linux/mm.h>
  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/genapic.h>
  35 #include <asm/e820.h>
  36 #include <asm/setup.h>
  37
  38 #define MB_TO_PAGES(addr) ((addr) << (20 - PAGE_SHIFT))
  39
  40 /*
  41  * Function: smp_dump_qct()
  42  *
  43  * Description: gets memory layout from the quad config table.  This
  44  * function also updates node_online_map with the nodes (quads) present.
  45  */
  46 static void __init smp_dump_qct(void)
  47 {
  48         int node;
  49         struct eachquadmem *eq;
  50         struct sys_cfg_data *scd =
  51                 (struct sys_cfg_data *)__va(SYS_CFG_DATA_PRIV_ADDR);
  52
  53         nodes_clear(node_online_map);
  54         for_each_node(node) {
  55                 if (scd->quads_present31_0 & (1 << node)) {
  56                         node_set_online(node);
  57                         eq = &scd->eq[node];
  58                         /* Convert to pages */
  59                         node_start_pfn[node] = MB_TO_PAGES(
  60                                 eq->hi_shrd_mem_start - eq->priv_mem_size);
  61                         node_end_pfn[node] = MB_TO_PAGES(
  62                                 eq->hi_shrd_mem_start + eq->hi_shrd_mem_size);
  63
  64                         e820_register_active_regions(node, node_start_pfn[node],
  65                                                         node_end_pfn[node]);
  66                         memory_present(node,
  67                                 node_start_pfn[node], node_end_pfn[node]);
  68                         node_remap_size[node] = node_memmap_size_bytes(node,
  69                                                         node_start_pfn[node],
  70                                                         node_end_pfn[node]);
  71                 }
  72         }
  73 }
  74
  75
  76 void __cpuinit numaq_tsc_disable(void)
  77 {
  78         if (!found_numaq)
  79                 return;
  80
  81         if (num_online_nodes() > 1) {
  82                 printk(KERN_DEBUG "NUMAQ: disabling TSC\n");
  83                 setup_clear_cpu_cap(X86_FEATURE_TSC);
  84         }
  85 }
  86
  87 static int __init numaq_pre_time_init(void)
  88 {
  89         numaq_tsc_disable();
  90         return 0;
  91 }
  92
  93 int found_numaq;
  94 /*
  95  * Have to match translation table entries to main table entries by counter
  96  * hence the mpc_record variable .... can't see a less disgusting way of
  97  * doing this ....
  98  */
  99 struct mpc_config_translation {
 100         unsigned char mpc_type;
 101         unsigned char trans_len;
 102         unsigned char trans_type;
 103         unsigned char trans_quad;
 104         unsigned char trans_global;
 105         unsigned char trans_local;
 106         unsigned short trans_reserved;
 107 };
 108
 109 /* x86_quirks member */
 110 static int mpc_record;
 111 static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
 112     __cpuinitdata;
 113
 114 static inline int generate_logical_apicid(int quad, int phys_apicid)
 115 {
 116         return (quad << 4) + (phys_apicid ? phys_apicid << 1 : 1);
 117 }
 118
 119 /* x86_quirks member */
 120 static int mpc_apic_id(struct mpc_cpu *m)
 121 {
 122         int quad = translation_table[mpc_record]->trans_quad;
 123         int logical_apicid = generate_logical_apicid(quad, m->apicid);
 124
 125         printk(KERN_DEBUG "Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n",
 126                m->apicid, (m->cpufeature & CPU_FAMILY_MASK) >> 8,
 127                (m->cpufeature & CPU_MODEL_MASK) >> 4,
 128                m->apicver, quad, logical_apicid);
 129         return logical_apicid;
 130 }
 131
 132 int mp_bus_id_to_node[MAX_MP_BUSSES];
 133
 134 int mp_bus_id_to_local[MAX_MP_BUSSES];
 135
 136 /* x86_quirks member */
 137 static void mpc_oem_bus_info(struct mpc_bus *m, char *name)
 138 {
 139         int quad = translation_table[mpc_record]->trans_quad;
 140         int local = translation_table[mpc_record]->trans_local;
 141
 142         mp_bus_id_to_node[m->busid] = quad;
 143         mp_bus_id_to_local[m->busid] = local;
 144         printk(KERN_INFO "Bus #%d is %s (node %d)\n",
 145                m->busid, name, quad);
 146 }
 147
 148 int quad_local_to_mp_bus_id [NR_CPUS/4][4];
 149
 150 /* x86_quirks member */
 151 static void mpc_oem_pci_bus(struct mpc_bus *m)
 152 {
 153         int quad = translation_table[mpc_record]->trans_quad;
 154         int local = translation_table[mpc_record]->trans_local;
 155
 156         quad_local_to_mp_bus_id[quad][local] = m->busid;
 157 }
 158
 159 static void __init MP_translation_info(struct mpc_config_translation *m)
 160 {
 161         printk(KERN_INFO
 162                "Translation: record %d, type %d, quad %d, global %d, local %d\n",
 163                mpc_record, m->trans_type, m->trans_quad, m->trans_global,
 164                m->trans_local);
 165
 166         if (mpc_record >= MAX_MPC_ENTRY)
 167                 printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
 168         else
 169                 translation_table[mpc_record] = m;      /* stash this for later */
 170         if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
 171                 node_set_online(m->trans_quad);
 172 }
 173
 174 static int __init mpf_checksum(unsigned char *mp, int len)
 175 {
 176         int sum = 0;
 177
 178         while (len--)
 179                 sum += *mp++;
 180
 181         return sum & 0xFF;
 182 }
 183
 184 /*
 185  * Read/parse the MPC oem tables
 186  */
 187
 188 static void __init smp_read_mpc_oem(struct mpc_oemtable *oemtable,
 189                                     unsigned short oemsize)
 190 {
 191         int count = sizeof(*oemtable);  /* the header size */
 192         unsigned char *oemptr = ((unsigned char *)oemtable) + count;
 193
 194         mpc_record = 0;
 195         printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n",
 196                oemtable);
 197         if (memcmp(oemtable->signature, MPC_OEM_SIGNATURE, 4)) {
 198                 printk(KERN_WARNING
 199                        "SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
 200                        oemtable->signature[0], oemtable->signature[1],
 201                        oemtable->signature[2], oemtable->signature[3]);
 202                 return;
 203         }
 204         if (mpf_checksum((unsigned char *)oemtable, oemtable->length)) {
 205                 printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
 206                 return;
 207         }
 208         while (count < oemtable->length) {
 209                 switch (*oemptr) {
 210                 case MP_TRANSLATION:
 211                         {
 212                                 struct mpc_config_translation *m =
 213                                     (struct mpc_config_translation *)oemptr;
 214                                 MP_translation_info(m);
 215                                 oemptr += sizeof(*m);
 216                                 count += sizeof(*m);
 217                                 ++mpc_record;
 218                                 break;
 219                         }
 220                 default:
 221                         {
 222                                 printk(KERN_WARNING
 223                                        "Unrecognised OEM table entry type! - %d\n",
 224                                        (int)*oemptr);
 225                                 return;
 226                         }
 227                 }
 228         }
 229 }
 230
 231 static int __init numaq_setup_ioapic_ids(void)
 232 {
 233         /* so can skip it */
 234         return 1;
 235 }
 236
 237 static int __init numaq_update_genapic(void)
 238 {
 239         genapic->wakeup_cpu = wakeup_secondary_cpu_via_nmi;
 240
 241         return 0;
 242 }
 243
 244 static struct x86_quirks numaq_x86_quirks __initdata = {
 245         .arch_pre_time_init     = numaq_pre_time_init,
 246         .arch_time_init         = NULL,
 247         .arch_pre_intr_init     = NULL,
 248         .arch_memory_setup      = NULL,
 249         .arch_intr_init         = NULL,
 250         .arch_trap_init         = NULL,
 251         .mach_get_smp_config    = NULL,
 252         .mach_find_smp_config   = NULL,
 253         .mpc_record             = &mpc_record,
 254         .mpc_apic_id            = mpc_apic_id,
 255         .mpc_oem_bus_info       = mpc_oem_bus_info,
 256         .mpc_oem_pci_bus        = mpc_oem_pci_bus,
 257         .smp_read_mpc_oem       = smp_read_mpc_oem,
 258         .setup_ioapic_ids       = numaq_setup_ioapic_ids,
 259         .update_genapic         = numaq_update_genapic,
 260 };
 261
 262 void numaq_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
 263 {
 264         if (strncmp(oem, "IBM NUMA", 8))
 265                 printk("Warning!  Not a NUMA-Q system!\n");
 266         else
 267                 found_numaq = 1;
 268 }
 269
 270 static __init void early_check_numaq(void)
 271 {
 272         /*
 273          * Find possible boot-time SMP configuration:
 274          */
 275         early_find_smp_config();
 276         /*
 277          * get boot-time SMP configuration:
 278          */
 279         if (smp_found_config)
 280                 early_get_smp_config();
 281
 282         if (found_numaq)
 283                 x86_quirks = &numaq_x86_quirks;
 284 }
 285
 286 int __init get_memcfg_numaq(void)
 287 {
 288         early_check_numaq();
 289         if (!found_numaq)
 290                 return 0;
 291         smp_dump_qct();
 292         return 1;
 293 }