Felix Held | 8c75d4b | 2023-03-31 15:37:14 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <amdblocks/cpu.h> |
| 4 | #include <amdblocks/smn.h> |
| 5 | #include <cpu/amd/msr.h> |
| 6 | #include <cpu/x86/msr.h> |
| 7 | #include <device/pci_ops.h> |
| 8 | #include <soc/msr.h> |
| 9 | #include <soc/pci_devs.h> |
| 10 | #include <types.h> |
| 11 | |
| 12 | uint32_t get_pstate_0_reg(void) |
| 13 | { |
| 14 | return (pci_read_config32(SOC_PM_DEV, CORE_PERF_BOOST_CTRL) >> 2) & 0x7; |
| 15 | } |
| 16 | |
| 17 | static bool all_pstates_have_same_frequency_id(void) |
| 18 | { |
| 19 | union pstate_msr pstate_reg; |
| 20 | size_t i; |
| 21 | bool first = true; |
| 22 | uint32_t frequency_id; |
| 23 | |
Felix Held | c04d3ddb | 2023-07-17 22:59:02 +0200 | [diff] [blame^] | 24 | for (i = 0; i < PSTATE_MSR_COUNT; i++) { |
Felix Held | 8c75d4b | 2023-03-31 15:37:14 +0200 | [diff] [blame] | 25 | pstate_reg.raw = rdmsr(PSTATE_MSR(i)).raw; |
| 26 | |
| 27 | if (!pstate_reg.pstate_en) |
| 28 | continue; |
| 29 | |
| 30 | if (first) { |
| 31 | frequency_id = pstate_reg.cpu_fid_0_5; |
| 32 | first = false; |
| 33 | } else if (frequency_id != pstate_reg.cpu_fid_0_5) { |
| 34 | return false; |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | return true; |
| 39 | } |
| 40 | |
| 41 | #define CLK_PLL_LOCK_TIMER 0xD82220B8 |
| 42 | #define CLK_GATER_SEQUENCE_REGISTER 0xD8222114 |
| 43 | |
| 44 | uint32_t get_pstate_latency(void) |
| 45 | { |
| 46 | uint32_t latency = 0; |
| 47 | uint32_t smn_data; |
| 48 | uint32_t gaters_on_time, gaters_off_time; |
| 49 | |
| 50 | smn_data = smn_read32(CLK_GATER_SEQUENCE_REGISTER); |
| 51 | gaters_on_time = (smn_data & 0xff) * 10; |
| 52 | gaters_off_time = (smn_data >> 8 & 0xff) * 10; |
| 53 | latency += DIV_ROUND_UP(15 * gaters_on_time, 1000); |
| 54 | latency += DIV_ROUND_UP(15 * gaters_off_time, 1000); |
| 55 | |
| 56 | if (!all_pstates_have_same_frequency_id()) { |
| 57 | smn_data = smn_read32(CLK_PLL_LOCK_TIMER); |
| 58 | latency += DIV_ROUND_UP(smn_data & 0x1fff, 100); |
| 59 | } |
| 60 | |
| 61 | return latency; |
| 62 | } |