| /* |
| * This file is part of the coreboot project. |
| * |
| * 2004.12 yhlu add dual core support |
| * |
| * 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/cpu.h> |
| #include <cpu/x86/lapic.h> |
| #include <cpu/amd/multicore.h> |
| #include <device/device.h> |
| #include <device/pci.h> |
| #include <pc80/mc146818rtc.h> |
| #include <smp/spinlock.h> |
| #include <cpu/x86/mtrr.h> |
| #include <cpu/amd/msr.h> |
| #include <cpu/amd/model_fxx_rev.h> |
| #include <cpu/amd/amdk8_sysconf.h> |
| |
| static int disable_siblings = !CONFIG_LOGICAL_CPUS; |
| |
| #include "dualcore_id.c" |
| |
| static int get_max_siblings(int nodes) |
| { |
| device_t dev; |
| int nodeid; |
| int siblings=0; |
| |
| //get max siblings from all the nodes |
| for (nodeid=0; nodeid<nodes; nodeid++){ |
| int j; |
| dev = dev_find_slot(0, PCI_DEVFN(0x18+nodeid, 3)); |
| j = (pci_read_config32(dev, 0xe8) >> 12) & 3; |
| if (siblings < j) { |
| siblings = j; |
| } |
| } |
| |
| return siblings; |
| } |
| |
| static void enable_apic_ext_id(int nodes) |
| { |
| device_t dev; |
| int nodeid; |
| |
| //enable APIC_EXIT_ID all the nodes |
| for (nodeid=0; nodeid<nodes; nodeid++){ |
| uint32_t val; |
| dev = dev_find_slot(0, PCI_DEVFN(0x18+nodeid, 0)); |
| val = pci_read_config32(dev, 0x68); |
| val |= (1<<17)|(1<<18); |
| pci_write_config32(dev, 0x68, val); |
| } |
| } |
| |
| |
| unsigned get_apicid_base(unsigned ioapic_num) |
| { |
| device_t dev; |
| int nodes; |
| unsigned apicid_base; |
| int siblings; |
| unsigned nb_cfg_54; |
| int bsp_apic_id = lapicid(); // bsp apicid |
| |
| get_option(&disable_siblings, "multi_core"); |
| |
| //get the nodes number |
| dev = dev_find_slot(0, PCI_DEVFN(0x18,0)); |
| nodes = ((pci_read_config32(dev, 0x60)>>4) & 7) + 1; |
| |
| siblings = get_max_siblings(nodes); |
| |
| if (bsp_apic_id > 0) { // IOAPIC could start from 0 |
| return 0; |
| } else if (pci_read_config32(dev, 0x68) & ( (1<<17) | (1<<18)) ) { // enabled ext id but bsp = 0 |
| return 1; |
| } |
| |
| nb_cfg_54 = read_nb_cfg_54(); |
| |
| #if 0 |
| //it is for all e0 single core and nc_cfg_54 low is set, but in the romstage.c stage we do not set that bit for it. |
| if (nb_cfg_54 && (!disable_siblings) && (siblings == 0)) { |
| //we need to check if e0 single core is there |
| int i; |
| for (i=0; i<nodes; i++) { |
| if (is_e0_later_in_bsp(i)) { |
| siblings = 1; |
| break; |
| } |
| } |
| } |
| #endif |
| |
| //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) * nodes : 8 * siblings + nodes; |
| |
| } |
| else { |
| apicid_base = nodes; |
| } |
| |
| if ((apicid_base+ioapic_num-1)>0xf) { |
| // We need to enable APIC EXT ID |
| printk(BIOS_INFO, "if the IOAPIC device doesn't support 256 APIC id,\n you need to set CONFIG_ENABLE_APIC_EXT_ID in romstage.c so you can spare 16 id for IOAPIC\n"); |
| enable_apic_ext_id(nodes); |
| } |
| |
| return apicid_base; |
| } |