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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi.h>
#include <acpi/acpigen.h>
#include <arch/ioapic.h>
#include <device/mmio.h>
#include <arch/smp/mpspec.h>
#include <console/console.h>
#include <types.h>
#include <cpu/x86/msr.h>
#include <cpu/intel/turbo.h>
#include <soc/iomap.h>
#include <soc/irq.h>
#include <soc/msr.h>
#include <soc/pattrs.h>
#include <soc/pm.h>
#define MWAIT_RES(state, sub_state) \
{ \
.addrl = (((state) << 4) | (sub_state)), \
.space_id = ACPI_ADDRESS_SPACE_FIXED, \
.bit_width = ACPI_FFIXEDHW_VENDOR_INTEL, \
.bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT, \
.access_size = ACPI_FFIXEDHW_FLAG_HW_COORD, \
}
/* C-state map without S0ix */
static const acpi_cstate_t cstate_map[] = {
{
/* C1 */
.ctype = 1, /* ACPI C1 */
.latency = 1,
.power = 1000,
.resource = MWAIT_RES(0, 0),
},
{
/* C6NS with no L2 shrink */
/* NOTE: this substate is above CPUID limit */
.ctype = 2, /* ACPI C2 */
.latency = 500,
.power = 10,
.resource = MWAIT_RES(5, 1),
},
{
/* C6FS with full L2 shrink */
.ctype = 3, /* ACPI C3 */
.latency = 1500, /* 1.5ms worst case */
.power = 1,
.resource = MWAIT_RES(5, 2),
}
};
static u8 soc_madt_sci_irq_polarity(u8 sci_irq)
{
if (sci_irq >= 20)
return MP_IRQ_POLARITY_LOW;
else
return MP_IRQ_POLARITY_HIGH;
}
#define ACPI_SCI_IRQ 9
void ioapic_get_sci_pin(u8 *gsi, u8 *irq, u8 *flags)
{
u32 *actl = (u32 *)(ILB_BASE_ADDRESS + ACTL);
int sci_irq = ACPI_SCI_IRQ;
int scis;
/* Determine how SCI is routed. */
scis = read32(actl) & SCIS_MASK;
switch (scis) {
case SCIS_IRQ9:
case SCIS_IRQ10:
case SCIS_IRQ11:
sci_irq = scis - SCIS_IRQ9 + 9;
break;
case SCIS_IRQ20:
case SCIS_IRQ21:
case SCIS_IRQ22:
case SCIS_IRQ23:
sci_irq = scis - SCIS_IRQ20 + 20;
break;
default:
printk(BIOS_DEBUG, "Invalid SCI route! Defaulting to IRQ%d.\n", sci_irq);
break;
}
*gsi = sci_irq;
*irq = (sci_irq < 16) ? sci_irq : ACPI_SCI_IRQ;
*flags = MP_IRQ_TRIGGER_LEVEL | soc_madt_sci_irq_polarity(sci_irq);
printk(BIOS_DEBUG, "SCI is IRQ %d, GSI %d\n", *irq, *gsi);
}
static acpi_tstate_t soc_tss_table[] = {
{ 100, 1000, 0, 0x00, 0 },
{ 88, 875, 0, 0x1e, 0 },
{ 75, 750, 0, 0x1c, 0 },
{ 63, 625, 0, 0x1a, 0 },
{ 50, 500, 0, 0x18, 0 },
{ 38, 375, 0, 0x16, 0 },
{ 25, 250, 0, 0x14, 0 },
{ 13, 125, 0, 0x12, 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 NVS controlled T-state limit */
acpigen_write_TPC("\\TLVL");
/* Write TSS table for MSR access */
acpigen_write_TSS_package(ARRAY_SIZE(soc_tss_table), soc_tss_table);
}
static int calculate_power(int tdp, int p1_ratio, int ratio)
{
u32 m, power;
/*
* M = ((1.1 - ((p1_ratio - ratio) * 0.00625)) / 1.1) ^ 2
*/
m = (110000 - ((p1_ratio - ratio) * 625)) / 11;
m = (m * m) / 1000;
/*
* Power = (ratio / p1_ratio) * m * TDP
*/
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 ratio_min, ratio_max, ratio_turbo, ratio_step, ratio_range_2;
int coord_type, power_max, power_unit, num_entries;
int ratio, power, clock, clock_max;
int vid, vid_turbo, vid_min, vid_max, vid_range_2;
u32 control_status;
const struct pattrs *pattrs = pattrs_get();
msr_t msr;
/* Inputs from CPU attributes */
ratio_max = pattrs->iacore_ratios[IACORE_MAX];
ratio_min = pattrs->iacore_ratios[IACORE_LFM];
vid_max = pattrs->iacore_vids[IACORE_MAX];
vid_min = pattrs->iacore_vids[IACORE_LFM];
/* Set P-states coordination type based on MSR disable bit */
coord_type = (pattrs->num_cpus > 2) ? SW_ALL : HW_ALL;
/* Max Non-Turbo Frequency */
clock_max = (ratio_max * pattrs->bclk_khz) / 1000;
/* Calculate CPU TDP in mW */
msr = rdmsr(MSR_PKG_POWER_SKU_UNIT);
power_unit = 1 << (msr.lo & 0xf);
msr = rdmsr(MSR_PKG_POWER_LIMIT);
power_max = ((msr.lo & 0x7fff) / power_unit) * 1000;
/* Write _PCT indicating use of FFixedHW */
acpigen_write_empty_PCT();
/* Write _PPC with NVS specified limit on supported P-state */
acpigen_write_PPC_NVS();
/* Write PSD indicating configured coordination type */
acpigen_write_PSD_package(core, 1, coord_type);
/* Add P-state entries in _PSS table */
acpigen_write_name("_PSS");
/* Determine ratio points */
ratio_step = 1;
num_entries = (ratio_max - ratio_min) / ratio_step;
while (num_entries > 15) { /* ACPI max is 15 ratios */
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);
ratio_turbo = pattrs->iacore_ratios[IACORE_TURBO];
vid_turbo = pattrs->iacore_vids[IACORE_TURBO];
control_status = (ratio_turbo << 8) | vid_turbo;
/* Add entry for Turbo ratio */
acpigen_write_PSS_package(
clock_max + 1, /* MHz */
power_max, /* mW */
10, /* lat1 */
10, /* lat2 */
control_status, /* control */
control_status); /* status */
} else {
/* _PSS package count without Turbo */
acpigen_write_package(num_entries + 1);
ratio_turbo = ratio_max;
vid_turbo = vid_max;
}
/* First regular entry is max non-turbo ratio */
control_status = (ratio_max << 8) | vid_max;
acpigen_write_PSS_package(
clock_max, /* MHz */
power_max, /* mW */
10, /* lat1 */
10, /* lat2 */
control_status, /* control */
control_status); /* status */
/* Set up ratio and vid ranges for VID calculation */
ratio_range_2 = (ratio_turbo - ratio_min) * 2;
vid_range_2 = (vid_turbo - vid_min) * 2;
/* Generate the remaining entries */
for (ratio = ratio_min + ((num_entries - 1) * ratio_step);
ratio >= ratio_min; ratio -= ratio_step) {
/* Calculate VID for this ratio */
vid = ((ratio - ratio_min) * vid_range_2) / ratio_range_2 + vid_min;
/* Round up if remainder */
if (((ratio - ratio_min) * vid_range_2) % ratio_range_2)
vid++;
/* Calculate power at this ratio */
power = calculate_power(power_max, ratio_max, ratio);
clock = (ratio * pattrs->bclk_khz) / 1000;
control_status = (ratio << 8) | (vid & 0xff);
acpigen_write_PSS_package(
clock, /* MHz */
power, /* mW */
10, /* lat1 */
10, /* lat2 */
control_status, /* control */
control_status); /* status */
}
/* Fix package length */
acpigen_pop_len();
}
static void generate_cpu_entry(int core, int cores_per_package)
{
/* Generate Scope(\_SB) { Device(CPUx */
acpigen_write_processor_device(core);
/* Generate P-state tables */
generate_p_state_entries(core);
/* Generate C-state tables */
acpigen_write_CST_package(cstate_map, ARRAY_SIZE(cstate_map));
/* Generate T-state tables */
generate_t_state_entries(core, cores_per_package);
acpigen_write_processor_device_end();
}
void generate_cpu_entries(const struct device *device)
{
int core;
const struct pattrs *pattrs = pattrs_get();
for (core = 0; core < pattrs->num_cpus; core++)
generate_cpu_entry(core, pattrs->num_cpus);
/* PPKG is usually used for thermal management
of the first and only package. */
acpigen_write_processor_package("PPKG", 0, pattrs->num_cpus);
/* Add a method to notify processor nodes */
acpigen_write_processor_cnot(pattrs->num_cpus);
}
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