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Diffstat (limited to 'src/soc/amd/picasso/finalize.c')
-rw-r--r-- | src/soc/amd/picasso/finalize.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/finalize.c b/src/soc/amd/picasso/finalize.c new file mode 100644 index 0000000000..6572e1a201 --- /dev/null +++ b/src/soc/amd/picasso/finalize.c @@ -0,0 +1,60 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2018 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <cpu/x86/mp.h> +#include <cpu/x86/msr.h> +#include <cpu/amd/msr.h> +#include <bootstate.h> +#include <timer.h> +#include <console/console.h> + +static void per_core_finalize(void *unused) +{ + msr_t hwcr, mask; + + /* Finalize SMM settings */ + hwcr = rdmsr(HWCR_MSR); + if (hwcr.lo & SMM_LOCK) /* Skip if already locked, avoid GPF */ + return; + + if (CONFIG(SMM_TSEG)) { + mask = rdmsr(SMM_MASK_MSR); + mask.lo |= SMM_TSEG_VALID; + wrmsr(SMM_MASK_MSR, mask); + } + + hwcr.lo |= SMM_LOCK; + wrmsr(HWCR_MSR, hwcr); +} + +static void finalize_cores(void) +{ + int r; + printk(BIOS_SPEW, "Lock SMM configuration\n"); + + r = mp_run_on_all_cpus(per_core_finalize, NULL, 10 * USECS_PER_MSEC); + if (r) + printk(BIOS_WARNING, "Failed to finalize all cores\n"); +} + +static void soc_finalize(void *unused) +{ + finalize_cores(); + + post_code(POST_OS_BOOT); +} + +BOOT_STATE_INIT_ENTRY(BS_OS_RESUME, BS_ON_ENTRY, soc_finalize, NULL); +BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_EXIT, soc_finalize, NULL); |