From 0a4e0fd913006de8f5d0a4ea24e013f30243cf5c Mon Sep 17 00:00:00 2001 From: Arthur Heymans Date: Sat, 6 Jan 2018 18:40:23 +0100 Subject: cpu/intel/speedstep: Fix the PNOT ACPI method The PNOT method never notifies the CPU to update it's _CST methods due to reliance on inexisting variable (PDCx). Add a method in the speedstep ssdt generator to notify all available CPU nodes and hook this up in this file. The cpu.asl file is moved to cpu/intel/speedstep/acpi since it now relies on code generated in the speedstep ssdt generator. CPUs not using the speedstep code never included this PNOT method so this is a logical place for this code to be. Change-Id: Ie2ba5e07b401d6f7c80c31f2bfcd9ef3ac0c1ad1 Signed-off-by: Arthur Heymans Reviewed-on: https://review.coreboot.org/23144 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer --- src/cpu/intel/speedstep/acpi.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'src/cpu/intel/speedstep/acpi.c') diff --git a/src/cpu/intel/speedstep/acpi.c b/src/cpu/intel/speedstep/acpi.c index c154da0c29..73b7431608 100644 --- a/src/cpu/intel/speedstep/acpi.c +++ b/src/cpu/intel/speedstep/acpi.c @@ -23,6 +23,7 @@ #include #include #include +#include static int determine_total_number_of_cores(void) { @@ -164,4 +165,16 @@ void generate_cpu_entries(device_t device) /* PPKG is usually used for thermal management of the first and only package. */ acpigen_write_processor_package("PPKG", 0, cores_per_package); + + /* Add a method to notify processor nodes */ + acpigen_write_method("\\_PR.CNOT", 1); + for (coreID = 0; coreID < cores_per_package; coreID++) { + char buffer[DEVICE_PATH_MAX]; + snprintf(buffer, sizeof(buffer), "\\_PR.CP%c%c", + '0' + coreID / 10, '0' + coreID % 10); + acpigen_emit_byte(NOTIFY_OP); + acpigen_emit_namestring(buffer); + acpigen_emit_byte(ARG0_OP); + } + acpigen_pop_len(); } -- cgit v1.2.3