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To clear all DRAM on x86_32, add a new method that uses PAE to access
more than 32bit of address space.
Add Documentation as well.
Required for clearing all system memory as part of security API.
Tested on wedge100s:
Takes less than 2 seconds to clear 8GiB of DRAM.
Tested on P8H61M-Pro:
Takes less than 1 second to clear 4GiB of DRAM.
Change-Id: I00f7ecf87b5c9227a9d58a0b61eecc38007e1a57
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31549
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Change-Id: I170fc16675c2701f6ea133cfce6e5fabdfb0e8d3
Signed-off-by: Xiang Wang <wxjstz@126.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33460
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Philipp Hug <philipp@hug.cx>
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Describe state and assuptions made about x86_64 support.
Change-Id: I308a09b0eac269afd30df95ed3ea195238a6cfbe
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/c/30056
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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1. Add dot/period to the end of sentences
2. Remove blank line at the end of the file
3. Break lines after 75 characters
4. Use RISC-V spelling
5. Add comma for clarity
Change-Id: Icbe803dfbe92ca7850204a1a9f7175befe9c8bcf
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/28654
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Philipp Hug <philipp@hug.cx>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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Fixes: b159d5ba8f ("riscv: add documentation for stages and payloads")
Change-Id: I5ca8ed094c9b6d115da707375205872e782a66b2
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/28991
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
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Change-Id: Iff522e309e9cf9a31c1c79c24047d83d7fd0b00a
Signed-off-by: Ronald G. Minnich <rminnich@gmail.com>
Reviewed-on: https://review.coreboot.org/28619
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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