| /* 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; |
| } |