root/arch/x86/platform/sfi/sfi.c

DEFINITIONS

1. mp_sfi_register_lapic
2. sfi_parse_cpus
3. sfi_parse_ioapic
4. sfi_platform_init

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