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 | |
| 26 | printk(BIOS_DEBUG, "Initializing southbridge SMI..."); |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 27 | printk(BIOS_SPEW, " ... pmbase = 0x%04x\n", lpc_get_pmbase()); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 28 | |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 29 | smi_en = read_pmbase32(SMI_EN); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 30 | if (smi_en & APMC_EN) { |
| 31 | printk(BIOS_INFO, "SMI# handler already enabled?\n"); |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 32 | return 1; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 33 | } |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 34 | printk(BIOS_DEBUG, "\n"); |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 35 | return 0; |
| 36 | } |
| 37 | |
| 38 | static void smm_southbridge_enable(uint16_t pm1_events) |
| 39 | { |
| 40 | u32 smi_en; |
| 41 | u32 gpe0_en; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 42 | |
| 43 | /* Disable GPE0 PME_B0 */ |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 44 | gpe0_en = read_pmbase32(GPE0_EN); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 45 | gpe0_en &= ~PME_B0_EN; |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 46 | write_pmbase32(GPE0_EN, gpe0_en); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 47 | |
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 48 | write_pmbase16(PM1_EN, pm1_events); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 49 | |
| 50 | /* Enable SMI generation: |
| 51 | * - on TCO events |
| 52 | * - on APMC writes (io 0xb2) |
| 53 | * - on writes to SLP_EN (sleep states) |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 54 | * No SMIs: |
| 55 | * - on microcontroller writes (io 0x62/0x66) |
| 56 | */ |
| 57 | |
| 58 | smi_en = 0; /* reset SMI enables */ |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 59 | smi_en |= TCO_EN; |
| 60 | smi_en |= APMC_EN; |
Kyösti Mälkki | 9446447 | 2020-06-13 13:45:42 +0300 | [diff] [blame] | 61 | if (CONFIG(DEBUG_PERIODIC_SMI)) |
| 62 | smi_en |= PERIODIC_EN; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 63 | smi_en |= SLP_SMI_EN; |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 64 | |
| 65 | /* The following need to be on for SMIs to happen */ |
| 66 | smi_en |= EOS | GBL_SMI_EN; |
| 67 | |
Patrick Rudolph | ed3242e | 2018-06-29 10:34:37 +0200 | [diff] [blame] | 68 | write_pmbase32(SMI_EN, smi_en); |
Arthur Heymans | a050817 | 2018-01-25 11:30:22 +0100 | [diff] [blame] | 69 | } |
| 70 | |
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 71 | void global_smi_enable(void) |
| 72 | { |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 73 | if (smi_enabled()) |
| 74 | return; |
| 75 | |
| 76 | dump_all_status(); |
Kyösti Mälkki | 0778c86 | 2020-06-10 12:44:03 +0300 | [diff] [blame] | 77 | smm_southbridge_enable(PWRBTN_EN | GBL_EN); |
| 78 | } |
| 79 | |
Kyösti Mälkki | faf20d3 | 2019-08-14 05:41:41 +0300 | [diff] [blame] | 80 | void smm_southbridge_clear_state(void) |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 81 | { |
Kyösti Mälkki | 7e75f33 | 2020-06-14 12:23:04 +0300 | [diff] [blame] | 82 | if (smi_enabled()) |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 83 | return; |
Arthur Heymans | edbf5d9 | 2018-01-25 20:03:42 +0100 | [diff] [blame] | 84 | |
| 85 | /* Dump and clear status registers */ |
| 86 | reset_smi_status(); |
| 87 | reset_pm1_status(); |
| 88 | reset_tco_status(); |
| 89 | reset_gpe0_status(); |
| 90 | } |