2 * sfi.c - x86 architecture SFI support.
4 * Copyright (c) 2009, Intel Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
21 #define KMSG_COMPONENT "SFI"
22 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
24 #include <linux/acpi.h>
25 #include <linux/init.h>
26 #include <linux/sfi.h>
29 #include <asm/io_apic.h>
30 #include <asm/mpspec.h>
31 #include <asm/setup.h>
34 #ifdef CONFIG_X86_LOCAL_APIC
35 static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
37 /* All CPUs enumerated by SFI must be present and enabled */
38 static void __cpuinit mp_sfi_register_lapic(u8 id)
40 if (MAX_LOCAL_APIC - id <= 0) {
41 pr_warning("Processor #%d invalid (max %d)\n",
46 pr_info("registering lapic[%d]\n", id);
48 generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
51 static int __init sfi_parse_cpus(struct sfi_table_header *table)
53 struct sfi_table_simple *sb;
54 struct sfi_cpu_table_entry *pentry;
58 sb = (struct sfi_table_simple *)table;
59 cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
60 pentry = (struct sfi_cpu_table_entry *)sb->pentry;
62 for (i = 0; i < cpu_num; i++) {
63 mp_sfi_register_lapic(pentry->apic_id);
70 #endif /* CONFIG_X86_LOCAL_APIC */
72 #ifdef CONFIG_X86_IO_APIC
74 static int __init sfi_parse_ioapic(struct sfi_table_header *table)
76 struct sfi_table_simple *sb;
77 struct sfi_apic_table_entry *pentry;
80 sb = (struct sfi_table_simple *)table;
81 num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
82 pentry = (struct sfi_apic_table_entry *)sb->pentry;
84 for (i = 0; i < num; i++) {
85 mp_register_ioapic(i, pentry->phys_addr, gsi_top);
89 WARN(pic_mode, KERN_WARNING
90 "SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
94 #endif /* CONFIG_X86_IO_APIC */
97 * sfi_platform_init(): register lapics & io-apics
99 int __init sfi_platform_init(void)
101 #ifdef CONFIG_X86_LOCAL_APIC
102 register_lapic_address(sfi_lapic_addr);
103 sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
105 #ifdef CONFIG_X86_IO_APIC
106 sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);