98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#pragma once
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#include "acpi/acpi.h"
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#include "memory/pointer.h"
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#include "util/number.h"
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namespace acpi {
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struct fadt_flags_t {
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uint32_t wbinvd : 1;
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uint32_t wbinvd_flush : 1;
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uint32_t processor_c1 : 1;
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uint32_t p_level2_up : 1;
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uint32_t power_button : 1;
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uint32_t sleep_button : 1;
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uint32_t fixed_rtc : 1;
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uint32_t rtc_s4 : 1;
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uint32_t timer_value_extended : 1;
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uint32_t reserved : 23;
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};
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static_assert(sizeof(fadt_flags_t) == 4);
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// Prefix of the FADT through the flags field; real tables continue past this,
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// so no field after flags may be added without also handling table revisions.
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struct fadt_t {
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sdt_header_t header;
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uint32_t firmware_control;
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uint32_t dsdt_address;
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uint8_t reserved;
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uint8_t preferred_pm_profile;
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uint16_t sci_interrupt;
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uint32_t smi_command_port;
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uint8_t acpi_enable;
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uint8_t acpi_disable;
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uint8_t s4bios_request;
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uint8_t pstate_control;
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uint32_t pm1a_event_block;
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uint32_t pm1b_event_block;
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uint32_t pm1a_control_block;
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uint32_t pm1b_control_block;
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uint32_t pm2_control_block;
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uint32_t pm_timer_block;
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uint32_t gpe0_block;
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uint32_t gpe1_block;
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uint8_t pm1_event_length;
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uint8_t pm1_control_length;
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uint8_t pm2_control_length;
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uint8_t pm_timer_length;
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uint8_t gpe0_block_length;
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uint8_t gpe1_block_length;
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uint8_t gpe1_base;
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uint8_t cstate_control;
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uint16_t p_level2_latency;
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uint16_t p_level3_latency;
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uint16_t flush_size;
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uint16_t flush_stride;
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uint8_t duty_offset;
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uint8_t duty_width;
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uint8_t day_alarm;
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uint8_t month_alarm;
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uint8_t century;
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uint16_t iapc_boot_architecture;
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uint8_t reserved2;
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fadt_flags_t flags;
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} __attribute__((packed));
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static_assert(sizeof(fadt_t) == 116);
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constexpr uint64_t pm_timer_frequency_hz = 3'579'545;
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struct pm_timer_duration_t {
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uint64_t pm_ticks;
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};
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constexpr pm_timer_duration_t pm_timer_milliseconds(uint64_t count) {
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return pm_timer_duration_t{count * pm_timer_frequency_hz / 1'000};
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}
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struct Fadt {
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explicit Fadt(paddr_t fadt_physical) : table(fadt_physical.access<fadt_t>()) {}
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explicit Fadt(const fadt_t* fadt_table) : table(fadt_table) {}
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bool has_pm_timer() const {
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return table->pm_timer_block != 0 && table->pm_timer_length == 4;
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}
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uint16_t pm_timer_port() const {
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return static_cast<uint16_t>(table->pm_timer_block);
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}
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bool pm_timer_is_32bit() const {
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return table->flags.timer_value_extended != 0;
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}
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private:
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const fadt_t* table;
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};
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} // namespace acpi
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