1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * sfi.c - x86 architecture SFI support.
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2009, Intel Corporation.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #define KMSG_COMPONENT "SFI"
9*4882a593Smuzhiyun #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include <linux/acpi.h>
12*4882a593Smuzhiyun #include <linux/init.h>
13*4882a593Smuzhiyun #include <linux/sfi.h>
14*4882a593Smuzhiyun #include <linux/io.h>
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #include <asm/irqdomain.h>
17*4882a593Smuzhiyun #include <asm/io_apic.h>
18*4882a593Smuzhiyun #include <asm/mpspec.h>
19*4882a593Smuzhiyun #include <asm/setup.h>
20*4882a593Smuzhiyun #include <asm/apic.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #ifdef CONFIG_X86_LOCAL_APIC
23*4882a593Smuzhiyun static unsigned long sfi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun /* All CPUs enumerated by SFI must be present and enabled */
mp_sfi_register_lapic(u8 id)26*4882a593Smuzhiyun static void __init mp_sfi_register_lapic(u8 id)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun if (MAX_LOCAL_APIC - id <= 0) {
29*4882a593Smuzhiyun pr_warn("Processor #%d invalid (max %d)\n", id, MAX_LOCAL_APIC);
30*4882a593Smuzhiyun return;
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun pr_info("registering lapic[%d]\n", id);
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun generic_processor_info(id, GET_APIC_VERSION(apic_read(APIC_LVR)));
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
sfi_parse_cpus(struct sfi_table_header * table)38*4882a593Smuzhiyun static int __init sfi_parse_cpus(struct sfi_table_header *table)
39*4882a593Smuzhiyun {
40*4882a593Smuzhiyun struct sfi_table_simple *sb;
41*4882a593Smuzhiyun struct sfi_cpu_table_entry *pentry;
42*4882a593Smuzhiyun int i;
43*4882a593Smuzhiyun int cpu_num;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun sb = (struct sfi_table_simple *)table;
46*4882a593Smuzhiyun cpu_num = SFI_GET_NUM_ENTRIES(sb, struct sfi_cpu_table_entry);
47*4882a593Smuzhiyun pentry = (struct sfi_cpu_table_entry *)sb->pentry;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun for (i = 0; i < cpu_num; i++) {
50*4882a593Smuzhiyun mp_sfi_register_lapic(pentry->apic_id);
51*4882a593Smuzhiyun pentry++;
52*4882a593Smuzhiyun }
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun smp_found_config = 1;
55*4882a593Smuzhiyun return 0;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun #endif /* CONFIG_X86_LOCAL_APIC */
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun #ifdef CONFIG_X86_IO_APIC
60*4882a593Smuzhiyun
sfi_parse_ioapic(struct sfi_table_header * table)61*4882a593Smuzhiyun static int __init sfi_parse_ioapic(struct sfi_table_header *table)
62*4882a593Smuzhiyun {
63*4882a593Smuzhiyun struct sfi_table_simple *sb;
64*4882a593Smuzhiyun struct sfi_apic_table_entry *pentry;
65*4882a593Smuzhiyun int i, num;
66*4882a593Smuzhiyun struct ioapic_domain_cfg cfg = {
67*4882a593Smuzhiyun .type = IOAPIC_DOMAIN_STRICT,
68*4882a593Smuzhiyun .ops = &mp_ioapic_irqdomain_ops,
69*4882a593Smuzhiyun };
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun sb = (struct sfi_table_simple *)table;
72*4882a593Smuzhiyun num = SFI_GET_NUM_ENTRIES(sb, struct sfi_apic_table_entry);
73*4882a593Smuzhiyun pentry = (struct sfi_apic_table_entry *)sb->pentry;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun for (i = 0; i < num; i++) {
76*4882a593Smuzhiyun mp_register_ioapic(i, pentry->phys_addr, gsi_top, &cfg);
77*4882a593Smuzhiyun pentry++;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun WARN(pic_mode, KERN_WARNING
81*4882a593Smuzhiyun "SFI: pic_mod shouldn't be 1 when IOAPIC table is present\n");
82*4882a593Smuzhiyun pic_mode = 0;
83*4882a593Smuzhiyun return 0;
84*4882a593Smuzhiyun }
85*4882a593Smuzhiyun #endif /* CONFIG_X86_IO_APIC */
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun /*
88*4882a593Smuzhiyun * sfi_platform_init(): register lapics & io-apics
89*4882a593Smuzhiyun */
sfi_platform_init(void)90*4882a593Smuzhiyun int __init sfi_platform_init(void)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun #ifdef CONFIG_X86_LOCAL_APIC
93*4882a593Smuzhiyun register_lapic_address(sfi_lapic_addr);
94*4882a593Smuzhiyun sfi_table_parse(SFI_SIG_CPUS, NULL, NULL, sfi_parse_cpus);
95*4882a593Smuzhiyun #endif
96*4882a593Smuzhiyun #ifdef CONFIG_X86_IO_APIC
97*4882a593Smuzhiyun sfi_table_parse(SFI_SIG_APIC, NULL, NULL, sfi_parse_ioapic);
98*4882a593Smuzhiyun #endif
99*4882a593Smuzhiyun return 0;
100*4882a593Smuzhiyun }
101