1 /* 2 * From Coreboot file of same name 3 * 4 * Copyright (C) 2007-2009 coresystems GmbH 5 * 2012 secunet Security Networks AG 6 * 7 * SPDX-License-Identifier: GPL-2.0 8 */ 9 10 #ifndef _ASM_SPEEDSTEP_H 11 #define _ASM_SPEEDSTEP_H 12 13 /* Magic value used to locate speedstep configuration in the device tree */ 14 #define SPEEDSTEP_APIC_MAGIC 0xACAC 15 16 /* MWAIT coordination I/O base address. This must match 17 * the \_PR_.CPU0 PM base address. 18 */ 19 #define PMB0_BASE 0x510 20 21 /* PMB1: I/O port that triggers SMI once cores are in the same state. 22 * See CSM Trigger, at PMG_CST_CONFIG_CONTROL[6:4] 23 */ 24 #define PMB1_BASE 0x800 25 26 struct sst_state { 27 uint8_t dynfsb:1; /* whether this is SLFM */ 28 uint8_t nonint:1; /* add .5 to ratio */ 29 uint8_t ratio:6; 30 uint8_t vid; 31 uint8_t is_turbo; 32 uint8_t is_slfm; 33 uint32_t power; 34 }; 35 #define SPEEDSTEP_RATIO_SHIFT 8 36 #define SPEEDSTEP_RATIO_DYNFSB_SHIFT (7 + SPEEDSTEP_RATIO_SHIFT) 37 #define SPEEDSTEP_RATIO_DYNFSB (1 << SPEEDSTEP_RATIO_DYNFSB_SHIFT) 38 #define SPEEDSTEP_RATIO_NONINT_SHIFT (6 + SPEEDSTEP_RATIO_SHIFT) 39 #define SPEEDSTEP_RATIO_NONINT (1 << SPEEDSTEP_RATIO_NONINT_SHIFT) 40 #define SPEEDSTEP_RATIO_VALUE_MASK (0x1f << SPEEDSTEP_RATIO_SHIFT) 41 #define SPEEDSTEP_VID_MASK 0x3f 42 #define SPEEDSTEP_STATE_FROM_MSR(val, mask) ((struct sst_state){ \ 43 0, /* dynfsb won't be read. */ \ 44 ((val & mask) & SPEEDSTEP_RATIO_NONINT) ? 1 : 0, \ 45 (((val & mask) & SPEEDSTEP_RATIO_VALUE_MASK) \ 46 >> SPEEDSTEP_RATIO_SHIFT), \ 47 (val & mask) & SPEEDSTEP_VID_MASK, \ 48 0, /* not turbo by default */ \ 49 0, /* not slfm by default */ \ 50 0 /* power is hardcoded in software. */ \ 51 }) 52 #define SPEEDSTEP_ENCODE_STATE(state) ( \ 53 ((uint16_t)(state).dynfsb << SPEEDSTEP_RATIO_DYNFSB_SHIFT) | \ 54 ((uint16_t)(state).nonint << SPEEDSTEP_RATIO_NONINT_SHIFT) | \ 55 ((uint16_t)(state).ratio << SPEEDSTEP_RATIO_SHIFT) | \ 56 ((uint16_t)(state).vid & SPEEDSTEP_VID_MASK)) 57 #define SPEEDSTEP_DOUBLE_RATIO(state) ( \ 58 ((uint8_t)(state).ratio * 2) + (state).nonint) 59 60 struct sst_params { 61 struct sst_state slfm; 62 struct sst_state min; 63 struct sst_state max; 64 struct sst_state turbo; 65 }; 66 67 /* Looking at core2's spec, the highest normal bus ratio for an eist enabled 68 processor is 14, the lowest is always 6. This makes 5 states with the 69 minimal step width of 2. With turbo mode and super LFM we have at most 7. */ 70 #define SPEEDSTEP_MAX_NORMAL_STATES 5 71 #define SPEEDSTEP_MAX_STATES (SPEEDSTEP_MAX_NORMAL_STATES + 2) 72 struct sst_table { 73 /* Table of p-states for EMTTM and ACPI by decreasing performance. */ 74 struct sst_state states[SPEEDSTEP_MAX_STATES]; 75 int num_states; 76 }; 77 78 void speedstep_gen_pstates(struct sst_table *); 79 80 #define SPEEDSTEP_MAX_POWER_YONAH 31000 81 #define SPEEDSTEP_MIN_POWER_YONAH 13100 82 #define SPEEDSTEP_MAX_POWER_MEROM 35000 83 #define SPEEDSTEP_MIN_POWER_MEROM 25000 84 #define SPEEDSTEP_SLFM_POWER_MEROM 12000 85 #define SPEEDSTEP_MAX_POWER_PENRYN 35000 86 #define SPEEDSTEP_MIN_POWER_PENRYN 15000 87 #define SPEEDSTEP_SLFM_POWER_PENRYN 12000 88 89 #endif 90