diff options
| author | Arthur Heymans <arthur@aheymans.xyz> | 2018-01-06 18:40:23 +0100 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2018-01-17 17:09:13 +0000 |
| commit | 0a4e0fd913006de8f5d0a4ea24e013f30243cf5c (patch) | |
| tree | 47d8e59bd239a7b6b74d25393f9e3efe6cf1e223 /src/cpu/intel/speedstep/acpi.c | |
| parent | 30bba281b9b4330f5fadf36d187c2512f94c29e0 (diff) | |
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 <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/23144
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/cpu/intel/speedstep/acpi.c')
| -rw-r--r-- | src/cpu/intel/speedstep/acpi.c | 13 |
1 files changed, 13 insertions, 0 deletions
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 <cpu/x86/msr.h> #include <cpu/intel/speedstep.h> #include <device/device.h> +#include <string.h> 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(); } |