src/cpu/intel/fsp_model_406dx/acpi.c - coreboot - Gitiles

 /*
  * This file is part of the coreboot project.
  *
  * Copyright (C) 2009 coresystems GmbH
  * Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
  * Copyright (C) 2013 Sage Electronic Engineering, LLC.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; version 2 of
  * the License.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  */

 #include <types.h>
 #include <console/console.h>
 #include <arch/acpi.h>
 #include <arch/acpigen.h>
 #include <arch/cpu.h>
 #include <cpu/x86/msr.h>
 #include <cpu/intel/speedstep.h>
 #include <cpu/intel/turbo.h>
 #include <device/device.h>
 #include <device/pci.h>
 #include "model_406dx.h"
 #include "chip.h"

 static int get_cores_per_package(void)
 {
 	struct cpuinfo_x86 c;
 	struct cpuid_result result;
 	int cores = 1;

 	get_fms(&c, cpuid_eax(1));
 	if (c.x86 != 6)
 		return 1;

 	result = cpuid_ext(0xb, 1);
 	cores = result.ebx & 0xff;

 	return cores;
 }

 static void generate_C_state_entries(void)
 {
 	struct cpu_info *info;
 	struct cpu_driver *cpu;
 	struct device *lapic;
 	struct cpu_intel_model_406dx_config *conf = NULL;

 	/* Find the SpeedStep CPU in the device tree using magic APIC ID */
 	lapic = dev_find_lapic(SPEEDSTEP_APIC_MAGIC);
 	if (!lapic)
 		return;
 	conf = lapic->chip_info;
 	if (!conf)
 		return;

 	/* Find CPU map of supported C-states */
 	info = cpu_info();
 	if (!info)
 		return;
 	cpu = find_cpu_driver(info->cpu);
 	if (!cpu || !cpu->cstates)
 		return;

 	acpigen_emit_byte(0x14);		/* MethodOp */
 	acpigen_write_len_f();		/* PkgLength */
 	acpigen_emit_namestring("_CST");
 	acpigen_emit_byte(0x00);		/* No Arguments */

 	/* If running on AC power */
 	acpigen_emit_byte(0xa0);		/* IfOp */
 	acpigen_write_len_f();		/* PkgLength */
 	acpigen_emit_namestring("PWRS");
 	acpigen_emit_byte(0xa4);	/* ReturnOp */
 	acpigen_pop_len();

 	/* Else on battery power */
 	acpigen_emit_byte(0xa4);	/* ReturnOp */
 	acpigen_pop_len();
 }

 static acpi_tstate_t tss_table_fine[] = {
 	{ 100, 1000, 0, 0x00, 0 },
 	{ 94, 940, 0, 0x1f, 0 },
 	{ 88, 880, 0, 0x1e, 0 },
 	{ 82, 820, 0, 0x1d, 0 },
 	{ 75, 760, 0, 0x1c, 0 },
 	{ 69, 700, 0, 0x1b, 0 },
 	{ 63, 640, 0, 0x1a, 0 },
 	{ 57, 580, 0, 0x19, 0 },
 	{ 50, 520, 0, 0x18, 0 },
 	{ 44, 460, 0, 0x17, 0 },
 	{ 38, 400, 0, 0x16, 0 },
 	{ 32, 340, 0, 0x15, 0 },
 	{ 25, 280, 0, 0x14, 0 },
 	{ 19, 220, 0, 0x13, 0 },
 	{ 13, 160, 0, 0x12, 0 },
 };

 static acpi_tstate_t tss_table_coarse[] = {
 	{ 100, 1000, 0, 0x00, 0 },
 	{ 88, 875, 0, 0x1f, 0 },
 	{ 75, 750, 0, 0x1e, 0 },
 	{ 63, 625, 0, 0x1d, 0 },
 	{ 50, 500, 0, 0x1c, 0 },
 	{ 38, 375, 0, 0x1b, 0 },
 	{ 25, 250, 0, 0x1a, 0 },
 	{ 13, 125, 0, 0x19, 0 },
 };

 static void generate_T_state_entries(int core, int cores_per_package)
 {
 	/* Indicate SW_ALL coordination for T-states */
 	acpigen_write_TSD_package(core, cores_per_package, SW_ALL);

 	/* Indicate FFixedHW so OS will use MSR */
 	acpigen_write_empty_PTC();

 	/* Set a T-state limit that can be modified in NVS */
 	acpigen_write_TPC("\\TLVL");

 	/*
 	 * CPUID.(EAX=6):EAX[5] indicates support
 	 * for extended throttle levels.
 	 */
 	if (cpuid_eax(6) & (1 << 5))
 		acpigen_write_TSS_package(
 			ARRAY_SIZE(tss_table_fine), tss_table_fine);
 	else
 		acpigen_write_TSS_package(
 			ARRAY_SIZE(tss_table_coarse), tss_table_coarse);
 }

 static int calculate_power(int tdp, int p1_ratio, int ratio)
 {
 	u32 m;
 	u32 power;

 	/*
 	 * M = ((1.1 - ((p1_ratio - ratio) * 0.00625)) / 1.1) ^ 2
 	 *
 	 * Power = (ratio / p1_ratio) * m * tdp
 	 */

 	m = (110000 - ((p1_ratio - ratio) * 625)) / 11;
 	m = (m * m) / 1000;

 	power = ((ratio * 100000 / p1_ratio) / 100);
 	power *= (m / 100) * (tdp / 1000);
 	power /= 1000;

 	return (int)power;
 }

 static void generate_P_state_entries(int core, int cores_per_package)
 {
 	int ratio_min, ratio_max, ratio_turbo, ratio_step;
 	int coord_type, power_max, num_entries;
 	int ratio, power, clock, clock_max;
 	msr_t msr;

 	/* Rangeley uses hardware only control */
 	coord_type = HW_ALL;

 	/* Get bus ratio limits and calculate clock speeds */
 	msr = rdmsr(MSR_PLATFORM_INFO);
 	ratio_min = (msr.hi >> (40-32)) & 0xff; /* Max Efficiency Ratio */

 	/* Determine if this CPU has configurable TDP */
 	if (cpu_config_tdp_levels()) {
 		/* Set max ratio to nominal TDP ratio */
 		msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
 		ratio_max = msr.lo & 0xff;
 	} else {
 		/* Max Non-Turbo Ratio */
 		ratio_max = (msr.lo >> 8) & 0xff;
 	}
 	clock_max = ratio_max * RANGELEY_BCLK;

 	/* Calculate CPU TDP in mW */
 	msr = rdmsr(MSR_PKG_POWER_SKU_UNIT);
 	power_max = 2 << ((msr.lo & 0xf) - 1);


 	/* Write _PCT indicating use of FFixedHW */
 	acpigen_write_empty_PCT();

 	/* Write _PPC with no limit on supported P-state */
 	acpigen_write_PPC_NVS();

 	/* Write PSD indicating configured coordination type */
 	acpigen_write_PSD_package(core, cores_per_package, coord_type);

 	/* Add P-state entries in _PSS table */
 	acpigen_write_name("_PSS");

 	/* Determine ratio points */
 	ratio_step = PSS_RATIO_STEP;
 	num_entries = (ratio_max - ratio_min) / ratio_step;
 	while (num_entries > PSS_MAX_ENTRIES-1) {
 		ratio_step <<= 1;
 		num_entries >>= 1;
 	}

 	/* P[T] is Turbo state if enabled */
 	if (get_turbo_state() == TURBO_ENABLED) {
 		/* _PSS package count including Turbo */
 		acpigen_write_package(num_entries + 2);

 		msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
 		ratio_turbo = msr.lo & 0xff;

 		/* Add entry for Turbo ratio */
 		acpigen_write_PSS_package(
 			clock_max + 1,		/*MHz*/
 			power_max,		/*mW*/
 			PSS_LATENCY_TRANSITION,	/*lat1*/
 			PSS_LATENCY_BUSMASTER,	/*lat2*/
 			ratio_turbo << 8,	/*control*/
 			ratio_turbo << 8);	/*status*/
 	} else {
 		/* _PSS package count without Turbo */
 		acpigen_write_package(num_entries + 1);
 	}

 	/* First regular entry is max non-turbo ratio */
 	acpigen_write_PSS_package(
 		clock_max,		/*MHz*/
 		power_max,		/*mW*/
 		PSS_LATENCY_TRANSITION,	/*lat1*/
 		PSS_LATENCY_BUSMASTER,	/*lat2*/
 		ratio_max << 8,		/*control*/
 		ratio_max << 8);	/*status*/

 	/* Generate the remaining entries */
 	for (ratio = ratio_min + ((num_entries - 1) * ratio_step);
 	     ratio >= ratio_min; ratio -= ratio_step) {

 		/* Calculate power at this ratio */
 		power = calculate_power(power_max, ratio_max, ratio);
 		clock = ratio * RANGELEY_BCLK;

 		acpigen_write_PSS_package(
 			clock,			/*MHz*/
 			power,			/*mW*/
 			PSS_LATENCY_TRANSITION,	/*lat1*/
 			PSS_LATENCY_BUSMASTER,	/*lat2*/
 			ratio << 8,		/*control*/
 			ratio << 8);		/*status*/
 	}

 	/* Fix package length */
 	acpigen_pop_len();
 }

 void generate_cpu_entries(device_t device)
 {
 	int coreID, cpuID, pcontrol_blk = PMB0_BASE, plen = 6;
 	int totalcores = dev_count_cpu();
 	int cores_per_package = get_cores_per_package();
 	int numcpus = totalcores/cores_per_package;

 	printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n",
 	       numcpus, cores_per_package);

 	for (cpuID = 1; cpuID <= numcpus; cpuID++) {
 		for (coreID=1; coreID<=cores_per_package; coreID++) {
 			if (coreID>1) {
 				pcontrol_blk = 0;
 				plen = 0;
 			}

 			/* Generate processor \_PR.CPUx */
 			acpigen_write_processor(
 				(cpuID-1)*cores_per_package+coreID-1,
 				pcontrol_blk, plen);

 			/* Generate P-state tables */
 			generate_P_state_entries(
 				cpuID-1, cores_per_package);

 			/* Generate C-state tables */
 			generate_C_state_entries();

 			/* Generate T-state tables */
 			generate_T_state_entries(
 				cpuID-1, cores_per_package);

 			acpigen_pop_len();
 		}
 	}
 }

 struct chip_operations cpu_intel_model_406dx_ops = {
 	CHIP_NAME("Intel Rangeley CPU")
 };
	/*
	* This file is part of the coreboot project.
	*
	* Copyright (C) 2009 coresystems GmbH
	* Copyright (C) 2011 The Chromium OS Authors. All rights reserved.
	* Copyright (C) 2013 Sage Electronic Engineering, LLC.
	*
	* This program is free software; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License as
	* published by the Free Software Foundation; version 2 of
	* the License.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*/

	#include <types.h>
	#include <console/console.h>
	#include <arch/acpi.h>
	#include <arch/acpigen.h>
	#include <arch/cpu.h>
	#include <cpu/x86/msr.h>
	#include <cpu/intel/speedstep.h>
	#include <cpu/intel/turbo.h>
	#include <device/device.h>
	#include <device/pci.h>
	#include "model_406dx.h"
	#include "chip.h"

	static int get_cores_per_package(void)
	{
	struct cpuinfo_x86 c;
	struct cpuid_result result;
	int cores = 1;

	get_fms(&c, cpuid_eax(1));
	if (c.x86 != 6)
	return 1;

	result = cpuid_ext(0xb, 1);
	cores = result.ebx & 0xff;

	return cores;
	}

	static void generate_C_state_entries(void)
	{
	struct cpu_info *info;
	struct cpu_driver *cpu;
	struct device *lapic;
	struct cpu_intel_model_406dx_config *conf = NULL;

	/* Find the SpeedStep CPU in the device tree using magic APIC ID */
	lapic = dev_find_lapic(SPEEDSTEP_APIC_MAGIC);
	if (!lapic)
	return;
	conf = lapic->chip_info;
	if (!conf)
	return;

	/* Find CPU map of supported C-states */
	info = cpu_info();
	if (!info)
	return;
	cpu = find_cpu_driver(info->cpu);
	if (!cpu \|\| !cpu->cstates)
	return;

	acpigen_emit_byte(0x14); /* MethodOp */
	acpigen_write_len_f(); /* PkgLength */
	acpigen_emit_namestring("_CST");
	acpigen_emit_byte(0x00); /* No Arguments */

	/* If running on AC power */
	acpigen_emit_byte(0xa0); /* IfOp */
	acpigen_write_len_f(); /* PkgLength */
	acpigen_emit_namestring("PWRS");
	acpigen_emit_byte(0xa4); /* ReturnOp */
	acpigen_pop_len();

	/* Else on battery power */
	acpigen_emit_byte(0xa4); /* ReturnOp */
	acpigen_pop_len();
	}

	static acpi_tstate_t tss_table_fine[] = {
	{ 100, 1000, 0, 0x00, 0 },
	{ 94, 940, 0, 0x1f, 0 },
	{ 88, 880, 0, 0x1e, 0 },
	{ 82, 820, 0, 0x1d, 0 },
	{ 75, 760, 0, 0x1c, 0 },
	{ 69, 700, 0, 0x1b, 0 },
	{ 63, 640, 0, 0x1a, 0 },
	{ 57, 580, 0, 0x19, 0 },
	{ 50, 520, 0, 0x18, 0 },
	{ 44, 460, 0, 0x17, 0 },
	{ 38, 400, 0, 0x16, 0 },
	{ 32, 340, 0, 0x15, 0 },
	{ 25, 280, 0, 0x14, 0 },
	{ 19, 220, 0, 0x13, 0 },
	{ 13, 160, 0, 0x12, 0 },
	};

	static acpi_tstate_t tss_table_coarse[] = {
	{ 100, 1000, 0, 0x00, 0 },
	{ 88, 875, 0, 0x1f, 0 },
	{ 75, 750, 0, 0x1e, 0 },
	{ 63, 625, 0, 0x1d, 0 },
	{ 50, 500, 0, 0x1c, 0 },
	{ 38, 375, 0, 0x1b, 0 },
	{ 25, 250, 0, 0x1a, 0 },
	{ 13, 125, 0, 0x19, 0 },
	};

	static void generate_T_state_entries(int core, int cores_per_package)
	{
	/* Indicate SW_ALL coordination for T-states */
	acpigen_write_TSD_package(core, cores_per_package, SW_ALL);

	/* Indicate FFixedHW so OS will use MSR */
	acpigen_write_empty_PTC();

	/* Set a T-state limit that can be modified in NVS */
	acpigen_write_TPC("\\TLVL");

	/*
	* CPUID.(EAX=6):EAX[5] indicates support
	* for extended throttle levels.
	*/
	if (cpuid_eax(6) & (1 << 5))
	acpigen_write_TSS_package(
	ARRAY_SIZE(tss_table_fine), tss_table_fine);
	else
	acpigen_write_TSS_package(
	ARRAY_SIZE(tss_table_coarse), tss_table_coarse);
	}

	static int calculate_power(int tdp, int p1_ratio, int ratio)
	{
	u32 m;
	u32 power;

	/*
	* M = ((1.1 - ((p1_ratio - ratio) * 0.00625)) / 1.1) ^ 2
	*
	* Power = (ratio / p1_ratio) * m * tdp
	*/

	m = (110000 - ((p1_ratio - ratio) * 625)) / 11;
	m = (m * m) / 1000;

	power = ((ratio * 100000 / p1_ratio) / 100);
	power = (m / 100) (tdp / 1000);
	power /= 1000;

	return (int)power;
	}

	static void generate_P_state_entries(int core, int cores_per_package)
	{
	int ratio_min, ratio_max, ratio_turbo, ratio_step;
	int coord_type, power_max, num_entries;
	int ratio, power, clock, clock_max;
	msr_t msr;

	/* Rangeley uses hardware only control */
	coord_type = HW_ALL;

	/* Get bus ratio limits and calculate clock speeds */
	msr = rdmsr(MSR_PLATFORM_INFO);
	ratio_min = (msr.hi >> (40-32)) & 0xff; /* Max Efficiency Ratio */

	/* Determine if this CPU has configurable TDP */
	if (cpu_config_tdp_levels()) {
	/* Set max ratio to nominal TDP ratio */
	msr = rdmsr(MSR_CONFIG_TDP_NOMINAL);
	ratio_max = msr.lo & 0xff;
	} else {
	/* Max Non-Turbo Ratio */
	ratio_max = (msr.lo >> 8) & 0xff;
	}
	clock_max = ratio_max * RANGELEY_BCLK;

	/* Calculate CPU TDP in mW */
	msr = rdmsr(MSR_PKG_POWER_SKU_UNIT);
	power_max = 2 << ((msr.lo & 0xf) - 1);


	/* Write _PCT indicating use of FFixedHW */
	acpigen_write_empty_PCT();

	/* Write _PPC with no limit on supported P-state */
	acpigen_write_PPC_NVS();

	/* Write PSD indicating configured coordination type */
	acpigen_write_PSD_package(core, cores_per_package, coord_type);

	/* Add P-state entries in _PSS table */
	acpigen_write_name("_PSS");

	/* Determine ratio points */
	ratio_step = PSS_RATIO_STEP;
	num_entries = (ratio_max - ratio_min) / ratio_step;
	while (num_entries > PSS_MAX_ENTRIES-1) {
	ratio_step <<= 1;
	num_entries >>= 1;
	}

	/* P[T] is Turbo state if enabled */
	if (get_turbo_state() == TURBO_ENABLED) {
	/* _PSS package count including Turbo */
	acpigen_write_package(num_entries + 2);

	msr = rdmsr(MSR_TURBO_RATIO_LIMIT);
	ratio_turbo = msr.lo & 0xff;

	/* Add entry for Turbo ratio */
	acpigen_write_PSS_package(
	clock_max + 1, /MHz/
	power_max, /mW/
	PSS_LATENCY_TRANSITION, /lat1/
	PSS_LATENCY_BUSMASTER, /lat2/
	ratio_turbo << 8, /control/
	ratio_turbo << 8); /status/
	} else {
	/* _PSS package count without Turbo */
	acpigen_write_package(num_entries + 1);
	}

	/* First regular entry is max non-turbo ratio */
	acpigen_write_PSS_package(
	clock_max, /MHz/
	power_max, /mW/
	PSS_LATENCY_TRANSITION, /lat1/
	PSS_LATENCY_BUSMASTER, /lat2/
	ratio_max << 8, /control/
	ratio_max << 8); /status/

	/* Generate the remaining entries */
	for (ratio = ratio_min + ((num_entries - 1) * ratio_step);
	ratio >= ratio_min; ratio -= ratio_step) {

	/* Calculate power at this ratio */
	power = calculate_power(power_max, ratio_max, ratio);
	clock = ratio * RANGELEY_BCLK;

	acpigen_write_PSS_package(
	clock, /MHz/
	power, /mW/
	PSS_LATENCY_TRANSITION, /lat1/
	PSS_LATENCY_BUSMASTER, /lat2/
	ratio << 8, /control/
	ratio << 8); /status/
	}

	/* Fix package length */
	acpigen_pop_len();
	}

	void generate_cpu_entries(device_t device)
	{
	int coreID, cpuID, pcontrol_blk = PMB0_BASE, plen = 6;
	int totalcores = dev_count_cpu();
	int cores_per_package = get_cores_per_package();
	int numcpus = totalcores/cores_per_package;

	printk(BIOS_DEBUG, "Found %d CPU(s) with %d core(s) each.\n",
	numcpus, cores_per_package);

	for (cpuID = 1; cpuID <= numcpus; cpuID++) {
	for (coreID=1; coreID<=cores_per_package; coreID++) {
	if (coreID>1) {
	pcontrol_blk = 0;
	plen = 0;
	}

	/* Generate processor \_PR.CPUx */
	acpigen_write_processor(
	(cpuID-1)*cores_per_package+coreID-1,
	pcontrol_blk, plen);

	/* Generate P-state tables */
	generate_P_state_entries(
	cpuID-1, cores_per_package);

	/* Generate C-state tables */
	generate_C_state_entries();

	/* Generate T-state tables */
	generate_T_state_entries(
	cpuID-1, cores_per_package);

	acpigen_pop_len();
	}
	}
	}

	struct chip_operations cpu_intel_model_406dx_ops = {
	CHIP_NAME("Intel Rangeley CPU")
	};