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author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2018-05-05 15:56:18 +0300 |
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committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2019-02-14 15:16:19 +0000 |
commit | ccb53e181726ddd90ec6d5a2b6d6b62ab8bd6a70 (patch) | |
tree | 93cab9d95f1c61d8bc2b77150f2669fe88089b5d /src | |
parent | 9c790a2fdc1fdf98cbc8fe92a6662c475ce36bed (diff) | |
download | coreboot-ccb53e181726ddd90ec6d5a2b6d6b62ab8bd6a70.tar.gz coreboot-ccb53e181726ddd90ec6d5a2b6d6b62ab8bd6a70.tar.bz2 coreboot-ccb53e181726ddd90ec6d5a2b6d6b62ab8bd6a70.zip |
binaryPI: Fix cache coherency use for AP CPUs
The memory between _car_region_start .. _car_region_end has to
be set up as WB in MTRRs for all the cores executing through
bootblock, verstage and romstage. Otherwise global variables may
fail on AP CPUs.
Fixes combination of CBMEM_CONSOLE=y with SQUELCH_EARLY_SMP=n,
which previously did not boot at all for some cases.
Change-Id: I4abcec90c03046e32dafcf97d2f7228ca93c5549
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Signed-off-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-on: https://review.coreboot.org/c/26115
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src')
4 files changed, 28 insertions, 0 deletions
diff --git a/src/vendorcode/amd/pi/00630F01/binaryPI/gcccar.inc b/src/vendorcode/amd/pi/00630F01/binaryPI/gcccar.inc index f444852e549c..51c6b52248f3 100644 --- a/src/vendorcode/amd/pi/00630F01/binaryPI/gcccar.inc +++ b/src/vendorcode/amd/pi/00630F01/binaryPI/gcccar.inc @@ -1438,6 +1438,13 @@ SetupStack: 0: _WRMSR # + # All cores must see BSP stack region that is also used to + # communicate global variables before DRAM is up. + mov $AMD_MTRR_FIX64k_00000, %ecx # MSR:0000_0250 + _RDMSR + or $0x1e000000, %eax + _WRMSR + # Enable MTRR defaults as UC type mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF _RDMSR # Read-modify-write the MSR diff --git a/src/vendorcode/amd/pi/00660F01/binaryPI/gcccar.inc b/src/vendorcode/amd/pi/00660F01/binaryPI/gcccar.inc index 0fbcf77eea33..b9cc39fac576 100644 --- a/src/vendorcode/amd/pi/00660F01/binaryPI/gcccar.inc +++ b/src/vendorcode/amd/pi/00660F01/binaryPI/gcccar.inc @@ -1179,6 +1179,13 @@ w64k_here: 0: _WRMSR # + # All cores must see BSP stack region that is also used to + # communicate global variables before DRAM is up. + mov $AMD_MTRR_FIX64k_00000, %ecx # MSR:0000_0250 + _RDMSR + or $0x1e000000, %eax + _WRMSR + # Enable MTRR defaults as UC type mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF _RDMSR # Read-modify-write the MSR diff --git a/src/vendorcode/amd/pi/00670F00/binaryPI/gcccar.inc b/src/vendorcode/amd/pi/00670F00/binaryPI/gcccar.inc index 2399bec91b77..46946327ce39 100644 --- a/src/vendorcode/amd/pi/00670F00/binaryPI/gcccar.inc +++ b/src/vendorcode/amd/pi/00670F00/binaryPI/gcccar.inc @@ -1158,6 +1158,13 @@ w64k_here: 0: _WRMSR # + # All cores must see BSP stack region that is also used to + # communicate global variables before DRAM is up. + mov $AMD_MTRR_FIX64k_00000, %ecx # MSR:0000_0250 + _RDMSR + or $0x1e000000, %eax + _WRMSR + # Enable MTRR defaults as UC type mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF _RDMSR # Read-modify-write the MSR diff --git a/src/vendorcode/amd/pi/00730F01/binaryPI/gcccar.inc b/src/vendorcode/amd/pi/00730F01/binaryPI/gcccar.inc index 7e12db1d0610..6c4ad596e19a 100644 --- a/src/vendorcode/amd/pi/00730F01/binaryPI/gcccar.inc +++ b/src/vendorcode/amd/pi/00730F01/binaryPI/gcccar.inc @@ -1153,6 +1153,13 @@ SetupStack: 0: _WRMSR # + # All cores must see BSP stack region that is also used to + # communicate global variables before DRAM is up. + mov $AMD_MTRR_FIX64k_00000, %ecx # MSR:0000_0250 + _RDMSR + or $0x1e000000, %eax + _WRMSR # + # Enable MTRR defaults as UC type mov $AMD_MTRR_DEFTYPE, %ecx # MSR:0000_02FF _RDMSR # Read-modify-write the MSR |