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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007 Advanced Micro Devices, Inc.
*
* 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; version 2 of the License.
*
* 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. See the
* GNU General Public License for more details.
*/
#include <console/console.h>
#include <cpu/x86/lapic.h>
#include <device/device.h>
#include <device/pci.h>
#include <device/pci_ops.h>
#include <pc80/mc146818rtc.h>
#include <smp/spinlock.h>
#include <cpu/x86/mtrr.h>
#include <cpu/amd/msr.h>
#include <cpu/amd/model_10xxx_rev.h>
#include <cpu/amd/amdfam10_sysconf.h>
extern struct device *get_node_pci(u32 nodeid, u32 fn);
#if 0
static int first_time = 1;
#endif
#include "quadcore_id.c"
static u32 get_max_siblings(u32 nodes)
{
struct device *dev;
u32 nodeid;
u32 siblings = 0;
//get max siblings from all the nodes
for (nodeid = 0; nodeid < nodes; nodeid++) {
int j;
dev = get_node_pci(nodeid, 3);
j = (pci_read_config32(dev, 0xe8) >> 12) & 3;
if (siblings < j)
siblings = j;
}
return siblings;
}
static void enable_apic_ext_id(u32 nodes)
{
struct device *dev;
u32 nodeid;
//enable APIC_EXIT_ID all the nodes
for (nodeid = 0; nodeid < nodes; nodeid++) {
u32 val;
dev = get_node_pci(nodeid, 0);
val = pci_read_config32(dev, 0x68);
val |= (1 << 17)|(1 << 18);
pci_write_config32(dev, 0x68, val);
}
}
u32 get_apicid_base(u32 ioapic_num)
{
u32 apicid_base;
u32 siblings;
u32 nb_cfg_54;
u32 disable_siblings = !CONFIG(LOGICAL_CPUS);
get_option(&disable_siblings, "multi_core");
siblings = get_max_siblings(sysconf.nodes);
if (sysconf.bsp_apicid > 0) {
// IOAPIC could start from 0
return 0;
} else if (sysconf.enabled_apic_ext_id) {
// enabled ext id but bsp = 0
return 1;
}
nb_cfg_54 = read_nb_cfg_54();
//Construct apicid_base
if ((!disable_siblings) && (siblings > 0)) {
/* for 8 way dual core, we will used up apicid 16:16, actually
16 is not allowed by current kernel and the kernel will try
to get one that is small than 16 to make IOAPIC work. I don't
know when the kernel can support 256 APIC id.
(APIC_EXT_ID is enabled) */
//4:10 for two way 8:12 for four way 16:16 for eight way
//Use CONFIG_MAX_PHYSICAL_CPUS instead of nodes
//for better consistency?
apicid_base = nb_cfg_54 ? (siblings+1) * sysconf.nodes :
8 * siblings + sysconf.nodes;
} else {
apicid_base = sysconf.nodes;
}
if ((apicid_base+ioapic_num-1) > 0xf) {
// We need to enable APIC EXT ID
printk(BIOS_SPEW, "if the IOAPIC device doesn't support 256 APIC id,\n you need to set CONFIG_ENABLE_APIC_EXT_ID in MB Option.lb so you can spare 16 id for IOAPIC\n");
enable_apic_ext_id(sysconf.nodes);
}
return apicid_base;
}
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