347 lines
7.2 KiB
C
347 lines
7.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* acpi.c - Architecture-Specific Low-Level ACPI Boot Support
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*
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* Author: Jianmin Lv <lvjianmin@loongson.cn>
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* Huacai Chen <chenhuacai@loongson.cn>
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
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*/
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#include <linux/init.h>
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#include <linux/acpi.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/memblock.h>
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#include <linux/of_fdt.h>
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#include <linux/serial_core.h>
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#include <asm/io.h>
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#include <asm/numa.h>
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#include <asm/loongson.h>
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#include "legacy_boot.h"
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int acpi_disabled;
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EXPORT_SYMBOL(acpi_disabled);
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int acpi_noirq;
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int acpi_pci_disabled;
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EXPORT_SYMBOL(acpi_pci_disabled);
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int acpi_strict = 1; /* We have no workarounds on LoongArch */
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int num_processors;
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int disabled_cpus;
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u64 acpi_saved_sp;
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#define PREFIX "ACPI: "
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struct acpi_madt_core_pic acpi_core_pic[MAX_CORE_PIC];
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void __init __iomem * __acpi_map_table(unsigned long phys, unsigned long size)
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{
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if (!phys || !size)
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return NULL;
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return early_memremap(phys, size);
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}
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void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
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{
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if (!map || !size)
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return;
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early_memunmap(map, size);
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}
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void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
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{
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if (!memblock_is_memory(phys))
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return ioremap(phys, size);
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else
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return ioremap_cache(phys, size);
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}
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#ifdef CONFIG_SMP
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int set_processor_mask(u32 id, u32 flags)
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{
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int cpu, cpuid = id;
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if (num_processors >= nr_cpu_ids) {
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pr_warn(PREFIX "nr_cpus/possible_cpus limit of %i reached."
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" processor 0x%x ignored.\n", nr_cpu_ids, cpuid);
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return -ENODEV;
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}
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if (cpuid == loongson_sysconf.boot_cpu_id)
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cpu = 0;
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else
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cpu = cpumask_next_zero(-1, cpu_present_mask);
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if (flags & ACPI_MADT_ENABLED) {
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num_processors++;
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set_cpu_possible(cpu, true);
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set_cpu_present(cpu, true);
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__cpu_number_map[cpuid] = cpu;
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__cpu_logical_map[cpu] = cpuid;
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} else
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disabled_cpus++;
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return cpu;
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}
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#endif
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static int __init
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acpi_parse_processor(union acpi_subtable_headers *header, const unsigned long end)
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{
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struct acpi_madt_core_pic *processor = NULL;
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processor = (struct acpi_madt_core_pic *)header;
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if (BAD_MADT_ENTRY(processor, end))
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return -EINVAL;
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acpi_table_print_madt_entry(&header->common);
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#ifdef CONFIG_SMP
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acpi_core_pic[processor->core_id] = *processor;
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set_processor_mask(processor->core_id, processor->flags);
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#endif
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return 0;
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}
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static int __init
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acpi_parse_eio_master(union acpi_subtable_headers *header, const unsigned long end)
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{
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static int core = 0;
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struct acpi_madt_eio_pic *eiointc = NULL;
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eiointc = (struct acpi_madt_eio_pic *)header;
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if (BAD_MADT_ENTRY(eiointc, end))
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return -EINVAL;
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core = eiointc->node * CORES_PER_EIO_NODE;
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set_bit(core, &(loongson_sysconf.cores_io_master));
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return 0;
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}
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static void __init acpi_process_madt(void)
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{
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#ifdef CONFIG_SMP
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int i;
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for (i = 0; i < NR_CPUS; i++) {
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__cpu_number_map[i] = -1;
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__cpu_logical_map[i] = -1;
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}
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#endif
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if (efi_bp && bpi_version <= BPI_VERSION_V1)
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legacy_madt_table_init();
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acpi_table_parse_madt(ACPI_MADT_TYPE_CORE_PIC,
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acpi_parse_processor, MAX_CORE_PIC);
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acpi_table_parse_madt(ACPI_MADT_TYPE_EIO_PIC,
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acpi_parse_eio_master, MAX_IO_PICS);
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loongson_sysconf.nr_cpus = num_processors;
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}
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int pptt_enabled;
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int __init parse_acpi_topology(void)
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{
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int cpu, topology_id;
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for_each_possible_cpu(cpu) {
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topology_id = find_acpi_cpu_topology(cpu, 0);
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if (topology_id < 0) {
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pr_warn("Invalid BIOS PPTT\n");
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return -ENOENT;
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}
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if (acpi_pptt_cpu_is_thread(cpu) <= 0)
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cpu_data[cpu].core = topology_id;
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else {
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topology_id = find_acpi_cpu_topology(cpu, 1);
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if (topology_id < 0)
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return -ENOENT;
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cpu_data[cpu].core = topology_id;
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}
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}
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pptt_enabled = 1;
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return 0;
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}
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#ifndef CONFIG_SUSPEND
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int (*acpi_suspend_lowlevel)(void);
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#else
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int (*acpi_suspend_lowlevel)(void) = loongarch_acpi_suspend;
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#endif
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void __init acpi_boot_table_init(void)
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{
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/*
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* If acpi_disabled, bail out
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*/
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if (acpi_disabled)
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goto fdt_earlycon;
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/*
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* Initialize the ACPI boot-time table parser.
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*/
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if (acpi_table_init()) {
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disable_acpi();
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goto fdt_earlycon;
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}
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loongson_sysconf.boot_cpu_id = read_csr_cpuid();
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/*
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* Process the Multiple APIC Description Table (MADT), if present
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*/
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acpi_process_madt();
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/* Do not enable ACPI SPCR console by default */
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acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
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return;
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fdt_earlycon:
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if (earlycon_acpi_spcr_enable)
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early_init_dt_scan_chosen_stdout();
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}
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#ifdef CONFIG_ACPI_NUMA
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static __init int setup_node(int pxm)
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{
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return acpi_map_pxm_to_node(pxm);
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}
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/*
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* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
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* I/O localities since SRAT does not list them. I/O localities are
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* not supported at this point.
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*/
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unsigned int numa_distance_cnt;
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static inline unsigned int get_numa_distances_cnt(struct acpi_table_slit *slit)
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{
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return slit->locality_count;
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}
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void __init numa_set_distance(int from, int to, int distance)
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{
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if ((u8)distance != distance || (from == to && distance != LOCAL_DISTANCE)) {
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pr_warn_once("Warning: invalid distance parameter, from=%d to=%d distance=%d\n",
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from, to, distance);
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return;
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}
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node_distances[from][to] = distance;
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}
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/* Callback for Proximity Domain -> CPUID mapping */
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void __init
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acpi_numa_processor_affinity_init(struct acpi_srat_cpu_affinity *pa)
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{
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int pxm, node;
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if (srat_disabled())
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return;
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if (pa->header.length != sizeof(struct acpi_srat_cpu_affinity)) {
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bad_srat();
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return;
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}
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if ((pa->flags & ACPI_SRAT_CPU_ENABLED) == 0)
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return;
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pxm = pa->proximity_domain_lo;
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if (acpi_srat_revision >= 2) {
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pxm |= (pa->proximity_domain_hi[0] << 8);
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pxm |= (pa->proximity_domain_hi[1] << 16);
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pxm |= (pa->proximity_domain_hi[2] << 24);
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}
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node = setup_node(pxm);
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if (node < 0) {
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pr_err("SRAT: Too many proximity domains %x\n", pxm);
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bad_srat();
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return;
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}
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if (pa->apic_id >= CONFIG_NR_CPUS) {
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pr_info("SRAT: PXM %u -> CPU 0x%02x -> Node %u skipped apicid that is too big\n",
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pxm, pa->apic_id, node);
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return;
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}
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early_numa_add_cpu(pa->apic_id, node);
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set_cpuid_to_node(pa->apic_id, node);
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node_set(node, numa_nodes_parsed);
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pr_info("SRAT: PXM %u -> CPU 0x%02x -> Node %u\n", pxm, pa->apic_id, node);
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}
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#endif
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void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
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{
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memblock_reserve(addr, size);
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}
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#ifdef CONFIG_ACPI_HOTPLUG_CPU
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#include <acpi/processor.h>
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static int __ref acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
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{
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#ifdef CONFIG_ACPI_NUMA
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int nid;
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nid = acpi_get_node(handle);
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if (nid != NUMA_NO_NODE) {
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set_cpuid_to_node(physid, nid);
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node_set(nid, numa_nodes_parsed);
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set_cpu_numa_node(cpu, nid);
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cpumask_set_cpu(cpu, cpumask_of_node(nid));
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}
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#endif
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return 0;
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}
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int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
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{
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int cpu;
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cpu = set_processor_mask(physid, ACPI_MADT_ENABLED);
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if (cpu < 0) {
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pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
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return cpu;
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}
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acpi_map_cpu2node(handle, cpu, physid);
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*pcpu = cpu;
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return 0;
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}
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EXPORT_SYMBOL(acpi_map_cpu);
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int acpi_unmap_cpu(int cpu)
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{
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#ifdef CONFIG_ACPI_NUMA
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set_cpuid_to_node(cpu_logical_map(cpu), NUMA_NO_NODE);
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#endif
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set_cpu_present(cpu, false);
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num_processors--;
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pr_info("cpu%d hot remove!\n", cpu);
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return 0;
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}
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EXPORT_SYMBOL(acpi_unmap_cpu);
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#endif /* CONFIG_ACPI_HOTPLUG_CPU */
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