/*
* 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>
#include <asm/mpspec.h>
#include <asm/e820.h>
#include <asm/setup.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);
e820_register_active_regions(node, node_start_pfn[node],
node_end_pfn[node]);
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]);
}
}
}
void __init numaq_tsc_disable(void)
{
if (!found_numaq)
return;
if (num_online_nodes() > 1) {
printk(KERN_DEBUG "NUMAQ: disabling TSC\n");
setup_clear_cpu_cap(X86_FEATURE_TSC);
}
}
static int __init numaq_pre_time_init(void)
{
numaq_tsc_disable();
return 0;
}
int found_numaq;
/*
* Have to match translation table entries to main table entries by counter
* hence the mpc_record variable .... can't see a less disgusting way of
* doing this ....
*/
struct mpc_config_translation {
unsigned char mpc_type;
unsigned char trans_len;
unsigned char trans_type;
unsigned char trans_quad;
unsigned char trans_global;
unsigned char trans_local;
unsigned short trans_reserved;
};
/* x86_quirks member */
static int mpc_record;
static struct mpc_config_translation *translation_table[MAX_MPC_ENTRY]
__cpuinitdata;
static inline int generate_logical_apicid(int quad, int phys_apicid)
{
return (quad << 4) + (phys_apicid ? phys_apicid << 1 : 1);
}
/* x86_quirks member */
static int mpc_apic_id(struct mpc_config_processor *m)
{
int quad = translation_table[mpc_record]->trans_quad;
int logical_apicid = generate_logical_apicid(quad, m->mpc_apicid);
printk(KERN_DEBUG "Processor #%d %u:%u APIC version %d (quad %d, apic %d)\n",
m->mpc_apicid,
(m->mpc_cpufeature & CPU_FAMILY_MASK) >> 8,
(m->mpc_cpufeature & CPU_MODEL_MASK) >> 4,
m->mpc_apicver, quad, logical_apicid);
return logical_apicid;
}
int mp_bus_id_to_node[MAX_MP_BUSSES];
int mp_bus_id_to_local[MAX_MP_BUSSES];
/* x86_quirks member */
static void mpc_oem_bus_info(struct mpc_config_bus *m, char *name)
{
int quad = translation_table[mpc_record]->trans_quad;
int local = translation_table[mpc_record]->trans_local;
mp_bus_id_to_node[m->mpc_busid] = quad;
mp_bus_id_to_local[m->mpc_busid] = local;
printk(KERN_INFO "Bus #%d is %s (node %d)\n",
m->mpc_busid, name, quad);
}
int quad_local_to_mp_bus_id [NR_CPUS/4][4];
/* x86_quirks member */
static void mpc_oem_pci_bus(struct mpc_config_bus *m)
{
int quad = translation_table[mpc_record]->trans_quad;
int local = translation_table[mpc_record]->trans_local;
quad_local_to_mp_bus_id[quad][local] = m->mpc_busid;
}
static void __init MP_translation_info(struct mpc_config_translation *m)
{
printk(KERN_INFO
"Translation: record %d, type %d, quad %d, global %d, local %d\n",
mpc_record, m->trans_type, m->trans_quad, m->trans_global,
m->trans_local);
if (mpc_record >= MAX_MPC_ENTRY)
printk(KERN_ERR "MAX_MPC_ENTRY exceeded!\n");
else
translation_table[mpc_record] = m; /* stash this for later */
if (m->trans_quad < MAX_NUMNODES && !node_online(m->trans_quad))
node_set_online(m->trans_quad);
}
static int __init mpf_checksum(unsigned char *mp, int len)
{
int sum = 0;
while (len--)
sum += *mp++;
return sum & 0xFF;
}
/*
* Read/parse the MPC oem tables
*/
static void __init smp_read_mpc_oem(struct mp_config_oemtable *oemtable,
unsigned short oemsize)
{
int count = sizeof(*oemtable); /* the header size */
unsigned char *oemptr = ((unsigned char *)oemtable) + count;
mpc_record = 0;
printk(KERN_INFO "Found an OEM MPC table at %8p - parsing it ... \n",
oemtable);
if (memcmp(oemtable->oem_signature, MPC_OEM_SIGNATURE, 4)) {
printk(KERN_WARNING
"SMP mpc oemtable: bad signature [%c%c%c%c]!\n",
oemtable->oem_signature[0], oemtable->oem_signature[1],
oemtable->oem_signature[2], oemtable->oem_signature[3]);
return;
}
if (mpf_checksum((unsigned char *)oemtable, oemtable->oem_length)) {
printk(KERN_WARNING "SMP oem mptable: checksum error!\n");
return;
}
while (count < oemtable->oem_length) {
switch (*oemptr) {
case MP_TRANSLATION:
{
struct mpc_config_translation *m =
(struct mpc_config_translation *)oemptr;
MP_translation_info(m);
oemptr += sizeof(*m);
count += sizeof(*m);
++mpc_record;
break;
}
default:
{
printk(KERN_WARNING
"Unrecognised OEM table entry type! - %d\n",
(int)*oemptr);
return;
}
}
}
}
static int __init numaq_setup_ioapic_ids(void)
{
/* so can skip it */
return 1;
}
static struct x86_quirks numaq_x86_quirks __initdata = {
.arch_pre_time_init = numaq_pre_time_init,
.arch_time_init = NULL,
.arch_pre_intr_init = NULL,
.arch_memory_setup = NULL,
.arch_intr_init = NULL,
.arch_trap_init = NULL,
.mach_get_smp_config = NULL,
.mach_find_smp_config = NULL,
.mpc_record = &mpc_record,
.mpc_apic_id = mpc_apic_id,
.mpc_oem_bus_info = mpc_oem_bus_info,
.mpc_oem_pci_bus = mpc_oem_pci_bus,
.smp_read_mpc_oem = smp_read_mpc_oem,
.setup_ioapic_ids = numaq_setup_ioapic_ids,
};
void numaq_mps_oem_check(struct mp_config_table *mpc, char *oem,
char *productid)
{
if (strncmp(oem, "IBM NUMA", 8))
printk("Warning! Not a NUMA-Q system!\n");
else
found_numaq = 1;
}
static __init void early_check_numaq(void)
{
/*
* Find possible boot-time SMP configuration:
*/
early_find_smp_config();
/*
* get boot-time SMP configuration:
*/
if (smp_found_config)
early_get_smp_config();
if (found_numaq)
x86_quirks = &numaq_x86_quirks;
}
int __init get_memcfg_numaq(void)
{
early_check_numaq();
if (!found_numaq)
return 0;
smp_dump_qct();
return 1;
}
