Angel Pons | 182dbde | 2020-04-02 23:49:05 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 2 | |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 3 | #include <device/device.h> |
4 | #include <device/pci.h> | ||||
5 | #include <console/console.h> | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 6 | #include <cpu/x86/smm.h> |
Kyösti Mälkki | f091f4d | 2019-08-14 03:49:21 +0300 | [diff] [blame] | 7 | #include <cpu/intel/smm_reloc.h> |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 8 | #include <southbridge/intel/common/pmbase.h> |
Arthur Heymans | f0a017f | 2018-12-25 15:26:58 +0100 | [diff] [blame] | 9 | #include <southbridge/intel/common/pmutil.h> |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 10 | |
11 | #include "pmutil.h" | ||||
12 | |||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 13 | u16 get_pmbase(void) |
14 | { | ||||
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 15 | return lpc_get_pmbase(); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 16 | } |
17 | |||||
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 18 | static int smi_enabled(void) |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 19 | { |
20 | u32 smi_en; | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 21 | |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 22 | /* Log events from chipset before clearing */ |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 23 | if (CONFIG(ELOG)) |
Arthur Heymans | f0a017f | 2018-12-25 15:26:58 +0100 | [diff] [blame] | 24 | pch_log_state(); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 25 | |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 26 | smi_en = read_pmbase32(SMI_EN); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 27 | if (smi_en & APMC_EN) { |
28 | printk(BIOS_INFO, "SMI# handler already enabled?\n"); | ||||
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 29 | return 1; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 30 | } |
Kyösti Mälkki | 9916648 | 2022-11-25 09:07:56 +0200 | [diff] [blame] | 31 | |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 32 | return 0; |
33 | } | ||||
34 | |||||
35 | static void smm_southbridge_enable(uint16_t pm1_events) | ||||
36 | { | ||||
37 | u32 smi_en; | ||||
38 | u32 gpe0_en; | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 39 | |
40 | /* Disable GPE0 PME_B0 */ | ||||
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 41 | gpe0_en = read_pmbase32(GPE0_EN); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 42 | gpe0_en &= ~PME_B0_EN; |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 43 | write_pmbase32(GPE0_EN, gpe0_en); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 44 | |
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 45 | write_pmbase16(PM1_EN, pm1_events); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 46 | |
47 | /* Enable SMI generation: | ||||
48 | * - on TCO events | ||||
49 | * - on APMC writes (io 0xb2) | ||||
50 | * - on writes to SLP_EN (sleep states) | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 51 | * No SMIs: |
52 | * - on microcontroller writes (io 0x62/0x66) | ||||
53 | */ | ||||
54 | |||||
55 | smi_en = 0; /* reset SMI enables */ | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 56 | smi_en |= TCO_EN; |
57 | smi_en |= APMC_EN; | ||||
Kyösti Mälkki | 9446447 | 2020-06-13 13:45:42 +0300 | [diff] [blame] | 58 | if (CONFIG(DEBUG_PERIODIC_SMI)) |
59 | smi_en |= PERIODIC_EN; | ||||
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 60 | smi_en |= SLP_SMI_EN; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 61 | |
62 | /* The following need to be on for SMIs to happen */ | ||||
63 | smi_en |= EOS | GBL_SMI_EN; | ||||
64 | |||||
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 65 | write_pmbase32(SMI_EN, smi_en); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 66 | } |
67 | |||||
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 68 | void global_smi_enable(void) |
69 | { | ||||
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 70 | if (smi_enabled()) |
71 | return; | ||||
72 | |||||
73 | dump_all_status(); | ||||
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 74 | smm_southbridge_enable(PWRBTN_EN | GBL_EN); |
75 | } | ||||
76 | |||||
Kyösti Mälkki | faf20d3 | 2019-08-14 05:41:41 +0300 | [diff] [blame] | 77 | void smm_southbridge_clear_state(void) |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 78 | { |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 79 | if (smi_enabled()) |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 80 | return; |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 81 | |
82 | /* Dump and clear status registers */ | ||||
83 | reset_smi_status(); | ||||
84 | reset_pm1_status(); | ||||
85 | reset_tco_status(); | ||||
86 | reset_gpe0_status(); | ||||
87 | } |