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/* SPDX-License-Identifier: GPL-2.0-or-later */
#include <acpi/acpi.h>
#include <cpu/intel/msr.h>
#include <soc/iomap.h>
#include <soc/pmc.h>
#include <stdint.h>
unsigned long acpi_fill_lpit(unsigned long current)
{
uint16_t uid = 0;
acpi_lpi_desc_ncst_t *pkg_counter;
acpi_lpi_desc_ncst_t *sys_counter;
/*
* Package C10 (PC10) residency counter
*/
pkg_counter = (void *)current;
current += acpi_create_lpi_desc_ncst((void *)current, uid++);
/* MWAIT LPI state entry trigger */
pkg_counter->entry_trigger.addrl = 0x60; /* MWAIT(6,0) / HW C10 */
pkg_counter->entry_trigger.bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT;
pkg_counter->entry_trigger.bit_width = ACPI_FFIXEDHW_VENDOR_INTEL;
pkg_counter->entry_trigger.space_id = ACPI_ADDRESS_SPACE_FIXED;
pkg_counter->entry_trigger.access_size = ACPI_ACCESS_SIZE_UNDEFINED;
/* PC10 residency counter */
pkg_counter->residency_counter.addrl = MSR_PKG_C10_RESIDENCY;
pkg_counter->residency_counter.bit_offset = 0;
pkg_counter->residency_counter.bit_width = 64;
pkg_counter->residency_counter.space_id = ACPI_ADDRESS_SPACE_FIXED;
pkg_counter->residency_counter.access_size = ACPI_ACCESS_SIZE_UNDEFINED;
pkg_counter->counter_frequency = ACPI_LPIT_CTR_FREQ_TSC;
/* Min. residency and worst-case latency (from FSP and vendor dumps) */
pkg_counter->min_residency = 30000; /* break-even: 30 ms */
pkg_counter->max_latency = 3000; /* worst-case latency: 3 ms */
/*
* System (Slp_S0) residency counter
*/
sys_counter = (void *)current;
current += acpi_create_lpi_desc_ncst((void *)current, uid++);
/* MWAIT LPI state entry trigger */
sys_counter->entry_trigger.addrl = 0x60; /* MWAIT(6,0) / HW C10 */
sys_counter->entry_trigger.bit_offset = ACPI_FFIXEDHW_CLASS_MWAIT;
sys_counter->entry_trigger.bit_width = ACPI_FFIXEDHW_VENDOR_INTEL;
sys_counter->entry_trigger.space_id = ACPI_ADDRESS_SPACE_FIXED;
sys_counter->entry_trigger.access_size = ACPI_ACCESS_SIZE_UNDEFINED;
/* Slp_S0 residency counter */
sys_counter->residency_counter.addrl = PCH_PWRM_BASE_ADDRESS + SLP_S0_RES;
sys_counter->residency_counter.bit_offset = 0;
sys_counter->residency_counter.bit_width = 32;
sys_counter->residency_counter.space_id = ACPI_ADDRESS_SPACE_MEMORY;
sys_counter->residency_counter.access_size = ACPI_ACCESS_SIZE_DWORD_ACCESS;
sys_counter->counter_frequency = ACPI_LPIT_CTR_FREQ_TSC;
/* Min. residency and worst-case latency (from FSP and vendor dumps) */
sys_counter->min_residency = 30000; /* break-even: 30 ms */
sys_counter->max_latency = 3000; /* worst-case latency: 3 ms */
return current;
}
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