| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/cpu.h> |
| #include <soc/msr.h> |
| #include <types.h> |
| |
| /* Value defined in Serial VID Interface 2.0 spec (#48022, NDA only) */ |
| #define SERIAL_VID_2_DECODE_MICROVOLTS 6250 |
| #define SERIAL_VID_2_MAX_MICROVOLTS 1550000L |
| |
| uint32_t get_uvolts_from_vid(uint16_t core_vid) |
| { |
| if (core_vid >= 0xF8) { |
| /* Voltage off for VID codes >= 0xF8 */ |
| return 0; |
| } else { |
| return SERIAL_VID_2_MAX_MICROVOLTS - |
| (SERIAL_VID_2_DECODE_MICROVOLTS * core_vid); |
| } |
| } |
| |
| uint32_t get_pstate_core_uvolts(union pstate_msr pstate_reg) |
| { |
| return get_uvolts_from_vid(pstate_reg.cpu_vid_0_7); |
| } |