/* * sfi.c - x86 architecture SFI support. * * Copyright (c) 2009, Intel Corporation. * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope 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. * * 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., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * */ #define KMSG_COMPONENT "SFI" #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt #include <linux/acpi.h> #include <linux/init.h> #include <linux/sfi.h> #include <linux/io.h> #include <asm/io_apic.h> #include <asm/mpspec.h> #include <asm/setup.h> #include <asm/apic.h> #ifdef CONFIG_X86_LOCAL_APIC static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE; void __init mp_sfi_register_lapic_address(unsigned long address) { mp_lapic_addr = address; set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr); if (boot_cpu_physical_apicid == -1U) boot_cpu_physical_apicid = read_apic_id(); pr_info("Boot CPU = %d\n", boot_cpu_physical_apicid); } /* All CPUs enumerated by SFI must be present and enabled */ void __cpuinit mp_sfi_register_lapic(u8 id) { if (MAX_APICS - id <= 0) { pr_warning("Processor #%d invalid (max %d)\n", id, MAX_APICS); return; } pr_info("registering lapic[%d]\n", id); generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR))); } static int __init sfi_parse_cpus(struct sfi_table_header *table) { struct sfi_table_simple *sb; struct sfi_cpu_table_entry *pentry; int i; int cpu_num; sb = (struct sfi_table_simple *)table; cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry); pentry = (struct sfi_cpu_table_entry *)sb->pentry; for (i = 0; i < cpu_num; i++) { mp_sfi_register_lapic(pentry->apic_id); pentry++; } smp_found_config = 1; return 0; } #endif /* CONFIG_X86_LOCAL_APIC */ #ifdef CONFIG_X86_IO_APIC static int __init sfi_parse_ioapic(struct sfi_table_header *table) { struct sfi_table_simple *sb; struct sfi_apic_table_entry *pentry; int i, num; sb = (struct sfi_table_simple *)table; num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry); pentry = (struct sfi_apic_table_entry *)sb->pentry; for (i = 0; i < num; i++) { mp_register_ioapic(i, pentry->phys_addr, gsi_top); pentry++; } WARN(pic_mode, KERN_WARNING "SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n"); pic_mode = 0; return 0; } #endif /* CONFIG_X86_IO_APIC */ /* * sfi_platform_init(): register lapics & io-apics */ int __init sfi_platform_init(void) { #ifdef CONFIG_X86_LOCAL_APIC mp_sfi_register_lapic_address(sfi_lapic_addr); sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus); #endif #ifdef CONFIG_X86_IO_APIC sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic); #endif return 0; }