diff options
| author | Patrick Rudolph <patrick.rudolph@9elements.com> | 2019-02-21 12:11:14 +0100 |
|---|---|---|
| committer | Philipp Deppenwiese <zaolin.daisuki@gmail.com> | 2019-07-02 08:46:00 +0000 |
| commit | a19b07fec13e713004e722f439e1ed7bc2e6ebd0 (patch) | |
| tree | 6c3a55848dc8cdfa97cc0de2d93d87599d113f0c /src/arch/x86 | |
| parent | c1b7e8a60be9853b5b00fc70615cea2fa8bfafc5 (diff) | |
security/memory: Clear memory in ramstage
* Add architecture independend way of clearing all DRAM
* Implemented in ramstage as MTRRs need to be set to speed up
clearing. Takes up to 15 seconds per GiB otherwise.
* Use memset_pae on x86
* Add quirks for FSP1.0
Tested on P8H61M-Pro:
* Clears 4GiB in less than 1 second
Tested on wedge100s:
* Clears 8GiB in 2 seconds
Change-Id: Idaadb8fb438e5b95557c0f65a14534e8762fde20
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31550
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/include/arch/memory_clear.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/arch/x86/include/arch/memory_clear.h b/src/arch/x86/include/arch/memory_clear.h new file mode 100644 index 0000000000..87ad7ada85 --- /dev/null +++ b/src/arch/x86/include/arch/memory_clear.h @@ -0,0 +1,24 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2019 9elements Agency GmbH + * Copyright (C) 2019 Facebook 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. + */ + +#ifndef MEMORY_CLEAR_H +#define MEMORY_CLEAR_H + +#include <memrange.h> + +int arch_clear_memranges(const struct memranges *mem_reserved); + +#endif /* MEMORY_CLEAR_H */ |