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// SPDX-License-Identifier: GPL-2.0-only
/*
* sfi.c - x86 architecture SFI support.
*
* Copyright (c) 2009, Intel Corporation.
*/
#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/irqdomain.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;
/* All CPUs enumerated by SFI must be present and enabled */
static void __init mp_sfi_register_lapic(u8 id)
{
if (MAX_LOCAL_APIC - id <= 0) {
pr_warn("Processor #%d invalid (max %d)\n", id, MAX_LOCAL_APIC);
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;
struct ioapic_domain_cfg cfg = {
.type = IOAPIC_DOMAIN_STRICT,
.ops = &mp_ioapic_irqdomain_ops,
};
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, &cfg);
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
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;
}
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