Angel Pons | 32abdd6 | 2020-04-05 15:47:03 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
Aamir Bohra | 3ee54bb | 2018-10-17 11:55:01 +0530 | [diff] [blame] | 2 | |
Kyösti Mälkki | 13f6650 | 2019-03-03 08:01:05 +0200 | [diff] [blame] | 3 | #include <device/mmio.h> |
Kyösti Mälkki | 32d47eb | 2019-09-28 00:00:30 +0300 | [diff] [blame] | 4 | #include <intelblocks/cfg.h> |
Michael Niewöhner | 8370f6b | 2019-09-17 18:48:00 +0200 | [diff] [blame] | 5 | #include <intelblocks/pmclib.h> |
Aamir Bohra | 3ee54bb | 2018-10-17 11:55:01 +0530 | [diff] [blame] | 6 | #include <intelpch/lockdown.h> |
| 7 | #include <soc/pm.h> |
| 8 | |
| 9 | static void pmc_lock_pmsync(void) |
| 10 | { |
| 11 | uint8_t *pmcbase; |
| 12 | uint32_t pmsyncreg; |
| 13 | |
| 14 | pmcbase = pmc_mmio_regs(); |
| 15 | |
| 16 | pmsyncreg = read32(pmcbase + PMSYNC_TPR_CFG); |
| 17 | pmsyncreg |= PCH2CPU_TPR_CFG_LOCK; |
| 18 | write32(pmcbase + PMSYNC_TPR_CFG, pmsyncreg); |
| 19 | } |
| 20 | |
| 21 | static void pmc_lock_abase(void) |
| 22 | { |
| 23 | uint8_t *pmcbase; |
| 24 | uint32_t reg32; |
| 25 | |
| 26 | pmcbase = pmc_mmio_regs(); |
| 27 | |
| 28 | reg32 = read32(pmcbase + GEN_PMCON_B); |
| 29 | reg32 |= (SLP_STR_POL_LOCK | ACPI_BASE_LOCK); |
| 30 | write32(pmcbase + GEN_PMCON_B, reg32); |
| 31 | } |
| 32 | |
| 33 | static void pmc_lock_smi(void) |
| 34 | { |
| 35 | uint8_t *pmcbase; |
| 36 | uint8_t reg8; |
| 37 | |
| 38 | pmcbase = pmc_mmio_regs(); |
| 39 | |
| 40 | reg8 = read8(pmcbase + GEN_PMCON_B); |
| 41 | reg8 |= SMI_LOCK; |
| 42 | write8(pmcbase + GEN_PMCON_B, reg8); |
| 43 | } |
| 44 | |
| 45 | static void pmc_lockdown_cfg(int chipset_lockdown) |
| 46 | { |
| 47 | /* PMSYNC */ |
| 48 | pmc_lock_pmsync(); |
| 49 | /* Lock down ABASE and sleep stretching policy */ |
| 50 | pmc_lock_abase(); |
Michael Niewöhner | 8370f6b | 2019-09-17 18:48:00 +0200 | [diff] [blame] | 51 | /* Make sure payload/OS can't trigger global reset */ |
| 52 | pmc_global_reset_disable_and_lock(); |
Aamir Bohra | 3ee54bb | 2018-10-17 11:55:01 +0530 | [diff] [blame] | 53 | |
| 54 | if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT) |
| 55 | pmc_lock_smi(); |
| 56 | } |
| 57 | |
| 58 | void soc_lockdown_config(int chipset_lockdown) |
| 59 | { |
| 60 | /* PMC lock down configuration */ |
| 61 | pmc_lockdown_cfg(chipset_lockdown); |
| 62 | } |