mirror of
https://github.com/AsahiLinux/u-boot
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113 lines
2.3 KiB
C
113 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2019 Google LLC
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*/
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#include <common.h>
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#include <cpu.h>
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#include <dm.h>
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#include <log.h>
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#include <acpi/acpigen.h>
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#include <acpi/acpi_table.h>
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#include <asm/cpu_common.h>
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#include <asm/cpu_x86.h>
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#include <asm/intel_acpi.h>
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#include <asm/msr.h>
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#include <dm/acpi.h>
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#define CSTATE_RES(address_space, width, offset, address) \
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{ \
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.space_id = address_space, \
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.bit_width = width, \
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.bit_offset = offset, \
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.addrl = address, \
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}
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static struct acpi_cstate cstate_map[] = {
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{
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/* C1 */
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.ctype = 1, /* ACPI C1 */
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.latency = 1,
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.power = 1000,
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.resource = {
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.space_id = ACPI_ADDRESS_SPACE_FIXED,
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},
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}, {
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.ctype = 2, /* ACPI C2 */
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.latency = 50,
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.power = 10,
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.resource = {
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.space_id = ACPI_ADDRESS_SPACE_IO,
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.bit_width = 8,
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.addrl = 0x415,
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},
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}, {
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.ctype = 3, /* ACPI C3 */
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.latency = 150,
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.power = 10,
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.resource = {
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.space_id = ACPI_ADDRESS_SPACE_IO,
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.bit_width = 8,
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.addrl = 0x419,
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},
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},
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};
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static int apl_get_info(const struct udevice *dev, struct cpu_info *info)
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{
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return cpu_intel_get_info(info, INTEL_BCLK_MHZ);
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}
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static int acpi_cpu_fill_ssdt(const struct udevice *dev, struct acpi_ctx *ctx)
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{
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uint core_id = dev->req_seq;
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int cores_per_package;
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int ret;
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cores_per_package = cpu_get_cores_per_package();
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ret = acpi_generate_cpu_header(ctx, core_id, cstate_map,
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ARRAY_SIZE(cstate_map));
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/* Generate P-state tables */
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generate_p_state_entries(ctx, core_id, cores_per_package);
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/* Generate T-state tables */
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generate_t_state_entries(ctx, core_id, cores_per_package, NULL, 0);
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acpigen_pop_len(ctx);
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if (device_is_last_sibling(dev)) {
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ret = acpi_generate_cpu_package_final(ctx, cores_per_package);
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if (ret)
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return ret;
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}
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return 0;
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}
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struct acpi_ops apl_cpu_acpi_ops = {
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.fill_ssdt = acpi_cpu_fill_ssdt,
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};
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static const struct cpu_ops cpu_x86_apl_ops = {
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.get_desc = cpu_x86_get_desc,
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.get_info = apl_get_info,
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.get_count = cpu_x86_get_count,
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.get_vendor = cpu_x86_get_vendor,
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};
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static const struct udevice_id cpu_x86_apl_ids[] = {
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{ .compatible = "intel,apl-cpu" },
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{ }
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};
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U_BOOT_DRIVER(cpu_x86_apl_drv) = {
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.name = "cpu_x86_apl",
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.id = UCLASS_CPU,
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.of_match = cpu_x86_apl_ids,
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.bind = cpu_x86_bind,
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.ops = &cpu_x86_apl_ops,
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ACPI_OPS_PTR(&apl_cpu_acpi_ops)
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.flags = DM_FLAG_PRE_RELOC,
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};
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