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| author | Felix Held <felix-coreboot@felixheld.de> | 2023-03-24 00:07:24 +0100 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-03-27 12:03:05 +0000 |
| commit | ca8a8de999824bfae5b66b32a237246805ed857c (patch) | |
| tree | 2817769b27a1662a1263a4f8254c719de464103c /src/soc/amd/common/block/acpi | |
| parent | 2c9de49a971497fadaf5272fd1bacee7a316dbfc (diff) | |
soc/amd: factor out common get_pstate_core_power implementation
Now that all get_pstate_core_power implementations in each SoC's acpi.c
file is identical, factor it out into a common implementation. This
implementation will also work for Stoneyridge which isn't using the
common P state code yet.
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Iba3833024a5e3ca5a47ffb1c1afdbfd884313c96
Reviewed-on: https://review.coreboot.org/c/coreboot/+/73997
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/amd/common/block/acpi')
| -rw-r--r-- | src/soc/amd/common/block/acpi/cpu_power_state.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/acpi/cpu_power_state.c b/src/soc/amd/common/block/acpi/cpu_power_state.c index 811bea09b2..d518ea082e 100644 --- a/src/soc/amd/common/block/acpi/cpu_power_state.c +++ b/src/soc/amd/common/block/acpi/cpu_power_state.c @@ -10,6 +10,42 @@ #include <soc/msr.h> #include <types.h> +static uint32_t get_pstate_core_power(union pstate_msr pstate_reg) +{ + uint32_t voltage_in_uvolts, current_value_amps, current_divisor, power_in_mw; + + /* Get Voltage from core voltage ID */ + voltage_in_uvolts = get_pstate_core_uvolts(pstate_reg); + + /* Current value in amps */ + current_value_amps = pstate_reg.idd_value; + + /* Current divisor */ + current_divisor = pstate_reg.idd_div; + + /* Power in mW */ + power_in_mw = (voltage_in_uvolts) / 10 * current_value_amps; + + switch (current_divisor) { + case 0: + power_in_mw = power_in_mw / 100L; + break; + case 1: + power_in_mw = power_in_mw / 1000L; + break; + case 2: + power_in_mw = power_in_mw / 10000L; + break; + case 3: + /* current_divisor is set to an undefined value.*/ + printk(BIOS_WARNING, "Undefined current_divisor set for enabled P-state .\n"); + power_in_mw = 0; + break; + } + + return power_in_mw; +} + /* * Populate structure describing enabled p-states and return count of enabled p-states. */ |