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// SPDX-License-Identifier: GPL-2.0
/*
* acpi.c - Architecture-Specific Low-Level ACPI Boot Support
*
* Author: Jianmin Lv <lvjianmin@loongson.cn>
* Huacai Chen <chenhuacai@loongson.cn>
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/init.h>
#include <linux/acpi.h>
#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/memblock.h>
#include <linux/serial_core.h>
#include <asm/io.h>
#include <asm/loongson.h>
int acpi_disabled;
EXPORT_SYMBOL(acpi_disabled);
int acpi_noirq;
int acpi_pci_disabled;
EXPORT_SYMBOL(acpi_pci_disabled);
int acpi_strict = 1; /* We have no workarounds on LoongArch */
int num_processors;
int disabled_cpus;
enum acpi_irq_model_id acpi_irq_model = ACPI_IRQ_MODEL_PLATFORM;
u64 acpi_saved_sp;
#define MAX_CORE_PIC 256
#define PREFIX "ACPI: "
int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
{
if (irqp != NULL)
*irqp = acpi_register_gsi(NULL, gsi, -1, -1);
return (*irqp >= 0) ? 0 : -EINVAL;
}
EXPORT_SYMBOL_GPL(acpi_gsi_to_irq);
int acpi_isa_irq_to_gsi(unsigned int isa_irq, u32 *gsi)
{
if (gsi)
*gsi = isa_irq;
return 0;
}
/*
* success: return IRQ number (>=0)
* failure: return < 0
*/
int acpi_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
{
struct irq_fwspec fwspec;
switch (gsi) {
case GSI_MIN_CPU_IRQ ... GSI_MAX_CPU_IRQ:
fwspec.fwnode = liointc_domain->fwnode;
fwspec.param[0] = gsi - GSI_MIN_CPU_IRQ;
fwspec.param_count = 1;
return irq_create_fwspec_mapping(&fwspec);
case GSI_MIN_LPC_IRQ ... GSI_MAX_LPC_IRQ:
if (!pch_lpc_domain)
return -EINVAL;
fwspec.fwnode = pch_lpc_domain->fwnode;
fwspec.param[0] = gsi - GSI_MIN_LPC_IRQ;
fwspec.param[1] = acpi_dev_get_irq_type(trigger, polarity);
fwspec.param_count = 2;
return irq_create_fwspec_mapping(&fwspec);
case GSI_MIN_PCH_IRQ ... GSI_MAX_PCH_IRQ:
if (!pch_pic_domain[0])
return -EINVAL;
fwspec.fwnode = pch_pic_domain[0]->fwnode;
fwspec.param[0] = gsi - GSI_MIN_PCH_IRQ;
fwspec.param[1] = IRQ_TYPE_LEVEL_HIGH;
fwspec.param_count = 2;
return irq_create_fwspec_mapping(&fwspec);
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(acpi_register_gsi);
void acpi_unregister_gsi(u32 gsi)
{
}
EXPORT_SYMBOL_GPL(acpi_unregister_gsi);
void __init __iomem * __acpi_map_table(unsigned long phys, unsigned long size)
{
if (!phys || !size)
return NULL;
return early_memremap(phys, size);
}
void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
{
if (!map || !size)
return;
early_memunmap(map, size);
}
void __init __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
{
if (!memblock_is_memory(phys))
return ioremap(phys, size);
else
return ioremap_cache(phys, size);
}
void __init acpi_boot_table_init(void)
{
/*
* If acpi_disabled, bail out
*/
if (acpi_disabled)
return;
/*
* Initialize the ACPI boot-time table parser.
*/
if (acpi_table_init()) {
disable_acpi();
return;
}
}
static int set_processor_mask(u32 id, u32 flags)
{
int cpu, cpuid = id;
if (num_processors >= nr_cpu_ids) {
pr_warn(PREFIX "nr_cpus/possible_cpus limit of %i reached."
" processor 0x%x ignored.\n", nr_cpu_ids, cpuid);
return -ENODEV;
}
if (cpuid == loongson_sysconf.boot_cpu_id)
cpu = 0;
else
cpu = cpumask_next_zero(-1, cpu_present_mask);
if (flags & ACPI_MADT_ENABLED) {
num_processors++;
set_cpu_possible(cpu, true);
set_cpu_present(cpu, true);
__cpu_number_map[cpuid] = cpu;
__cpu_logical_map[cpu] = cpuid;
} else
disabled_cpus++;
return cpu;
}
static void __init acpi_process_madt(void)
{
int i;
for (i = 0; i < NR_CPUS; i++) {
__cpu_number_map[i] = -1;
__cpu_logical_map[i] = -1;
}
loongson_sysconf.nr_cpus = num_processors;
}
int __init acpi_boot_init(void)
{
/*
* If acpi_disabled, bail out
*/
if (acpi_disabled)
return -1;
loongson_sysconf.boot_cpu_id = read_csr_cpuid();
/*
* Process the Multiple APIC Description Table (MADT), if present
*/
acpi_process_madt();
/* Do not enable ACPI SPCR console by default */
acpi_parse_spcr(earlycon_acpi_spcr_enable, false);
return 0;
}
void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
{
memblock_reserve(addr, size);
}
#ifdef CONFIG_ACPI_HOTPLUG_CPU
#include <acpi/processor.h>
int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
{
int cpu;
cpu = set_processor_mask(physid, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info(PREFIX "Unable to map lapic to logical cpu number\n");
return cpu;
}
*pcpu = cpu;
return 0;
}
EXPORT_SYMBOL(acpi_map_cpu);
int acpi_unmap_cpu(int cpu)
{
set_cpu_present(cpu, false);
num_processors--;
pr_info("cpu%d hot remove!\n", cpu);
return 0;
}
EXPORT_SYMBOL(acpi_unmap_cpu);
#endif /* CONFIG_ACPI_HOTPLUG_CPU */
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