Orange Pi5 kernel

// 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;
}