diff options
| author | Marshall Dawson <marshalldawson3rd@gmail.com> | 2017-08-25 15:29:45 -0600 |
|---|---|---|
| committer | Martin Roth <martinroth@google.com> | 2017-09-13 18:56:27 +0000 |
| commit | 0801b335dd11f7827b6c0164f06d75e7a94fff1e (patch) | |
| tree | 9ae7df47090af46ae1d84615294b85a12ced74e4 /src/soc/amd | |
| parent | 7e464dcb85354e22e733d94ef2b3e2c77fca22dc (diff) | |
amd/stoneyridge: Make cbmem_top SMM aware
Make the default for SMM_TSEG_SIZE depend on SMM_TSEG in addition to
HAVE_SMI_HANDLER.
Change the value returned by cbmem_top() to carve out a range to be
used by TSEG. The SMM Mask register has a granularity of 128KB but
align the value to 16MB to keep down the number of variable MTRRs
required.
Change-Id: I54ffc10108862b7d022fbbd92bf97525b349df27
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/21491
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/amd')
| -rw-r--r-- | src/soc/amd/stoneyridge/Kconfig | 2 | ||||
| -rw-r--r-- | src/soc/amd/stoneyridge/ramtop.c | 4 |
2 files changed, 4 insertions, 2 deletions
diff --git a/src/soc/amd/stoneyridge/Kconfig b/src/soc/amd/stoneyridge/Kconfig index 08613fe08a..f8768e7ea7 100644 --- a/src/soc/amd/stoneyridge/Kconfig +++ b/src/soc/amd/stoneyridge/Kconfig @@ -289,7 +289,7 @@ config STONEYRIDGE_UART config SMM_TSEG_SIZE hex - default 0x800000 if HAVE_SMI_HANDLER + default 0x800000 if SMM_TSEG && HAVE_SMI_HANDLER default 0x0 config ACPI_CPU_STRING diff --git a/src/soc/amd/stoneyridge/ramtop.c b/src/soc/amd/stoneyridge/ramtop.c index c81e73b4e1..bdad8d6057 100644 --- a/src/soc/amd/stoneyridge/ramtop.c +++ b/src/soc/amd/stoneyridge/ramtop.c @@ -41,5 +41,7 @@ void *cbmem_top(void) if (!tom.lo) return 0; else - return (void *)restore_top_of_low_cacheable(); + /* 16MB alignment to keep MTRR usage low */ + return (void *)ALIGN_DOWN(restore_top_of_low_cacheable() + - CONFIG_SMM_TSEG_SIZE, 16*MiB); } |