// SPDX-License-Identifier: ISC

#define pr_fmt(fmt) "acpi: " fmt

#include <zinnia/acpi.h>
#include <zinnia/alloc.h>
#include <zinnia/cmdline.h>
#include <zinnia/percpu.h>
#include <zinnia/print.h>
#include <zinnia/types.h>
#include <uacpi/status.h>
#include <uacpi/tables.h>
#include <uacpi/uacpi.h>

phys_t acpi_rsdp_addr = 0;

static char table_buf[0x1000];

static bool use_acpi = true;
void use_acpi_option(bool use) {
    use_acpi = use;
}
CMDLINE_OPTION("acpi", "Enable ACPI firmware subsystem", use_acpi_option);

[[__init]]
static bool acpi_stage_init(struct boot_info* info) {
    if (!use_acpi) {
        log_warn("ACPI disabled on the command line!\n");
        return false;
    }

    if (!info->rsdp) {
        log_warn("No RSDP was passed, unable to start ACPI subsystem!\n");
        return false;
    }
    acpi_rsdp_addr = info->rsdp;

    if (uacpi_setup_early_table_access(table_buf, sizeof(table_buf)) != UACPI_STATUS_OK) {
        log_err("Failed to set up early table access!\n");
        return false;
    }

    return true;
}
INIT_TASK(acpi_stage, "dev.acpi", acpi_stage_init);
INIT_DEPENDS(acpi_stage, mem_stage);
INIT_ENTAILS(acpi_stage, percpu_stage);