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authorJonathan A. Kollasch <jakllsch@kollasch.net>2015-07-20 09:51:34 -0500
committerJonathan A. Kollasch <jakllsch@kollasch.net>2015-07-23 18:30:19 +0200
commitacba73aefcbd7dacb547b61570a1836b745be2e5 (patch)
tree098ebd932670930651541536405d1f9b4548161d /src/southbridge
parentff40196c6c5a83b7cf2ceeb2dd027d4f2587b94a (diff)
downloadcoreboot-acba73aefcbd7dacb547b61570a1836b745be2e5.tar.xz
nvidia southbridges: don't touch 0x78 in LPC bridge with Fam10h
Based on the observations that AMD Fam10h with both Nvidia CK804 (Asus KFSN4-DRE) and MCP55 (Sun Ultra 40 M2) need to avoid adjusting the LPC bridge register 0x78 (particularly the 0x7b byte) to get to ramstage: Assume that there's something about this register that adjusting it the way we do for K8 is something that can/should be universally avoided on all Fam10h systems with these chipsets. Change-Id: I1eceeb20ecaefef4c61c11e19d1f5a59f91a0a2f Signed-off-by: Jonathan A. Kollasch <jakllsch@kollasch.net> Reviewed-on: http://review.coreboot.org/10984 Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Tested-by: build bot (Jenkins) Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Diffstat (limited to 'src/southbridge')
-rw-r--r--src/southbridge/nvidia/ck804/early_setup.c14
-rw-r--r--src/southbridge/nvidia/ck804/early_setup_car.c14
-rw-r--r--src/southbridge/nvidia/mcp55/early_setup_car.c10
3 files changed, 37 insertions, 1 deletions
diff --git a/src/southbridge/nvidia/ck804/early_setup.c b/src/southbridge/nvidia/ck804/early_setup.c
index c0a8766ea5..9c0a7833e9 100644
--- a/src/southbridge/nvidia/ck804/early_setup.c
+++ b/src/southbridge/nvidia/ck804/early_setup.c
@@ -152,10 +152,24 @@ static void ck804_early_setup(void)
RES_PCI_IO, PCI_ADDR(CK804B_BUSN, CK804B_DEVN_BASE + 9, 0, 0x74), 0xffffffc0, 0x00000000,
#endif
+#if IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AMDFAM10)
+ /*
+ * Avoid crash (complete with severe memory corruption!) during initial CAR boot
+ * in ck804_early_setup_x() on Fam10h systems by not touching 0x78.
+ * Interestingly once the system is fully booted into Linux this can be set, but
+ * not before! Apparently something isn't initialized but the amount of effort
+ * required to fix this is non-negligible and of unknown real-world benefit
+ */
+#else
RES_PCI_IO, PCI_ADDR(0, CK804_DEVN_BASE + 1, 0, 0x78), 0xc0ffffff, 0x19000000,
+#endif
RES_PCI_IO, PCI_ADDR(0, CK804_DEVN_BASE + 1, 0, 0xe0), 0xfffffeff, 0x00000100,
#if CONFIG_CK804_NUM > 1
+ /*
+ * Avoid touching 0x78 for CONFIG_NORTHBRIDGE_AMD_AMDFAM10 for
+ * non-primary chain too???
+ */
RES_PCI_IO, PCI_ADDR(CK804B_BUSN, CK804B_DEVN_BASE + 1, 0, 0x78), 0xc0ffffff, 0x20000000,
RES_PCI_IO, PCI_ADDR(CK804B_BUSN, CK804B_DEVN_BASE + 1, 0, 0xe0), 0xfffffeff, 0x00000000,
RES_PCI_IO, PCI_ADDR(CK804B_BUSN, CK804B_DEVN_BASE + 1, 0, 0xe8), 0xffffff00, 0x000000ff,
diff --git a/src/southbridge/nvidia/ck804/early_setup_car.c b/src/southbridge/nvidia/ck804/early_setup_car.c
index 8065d20fdb..87fdbdd4d6 100644
--- a/src/southbridge/nvidia/ck804/early_setup_car.c
+++ b/src/southbridge/nvidia/ck804/early_setup_car.c
@@ -142,7 +142,15 @@ static void ck804_early_setup(unsigned ck804_num, unsigned *busn,
CK804_MB_SETUP
#endif
-#ifndef CK804_SKIP_PCI_REG_78_INIT
+#if IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AMDFAM10)
+ /*
+ * Avoid crash (complete with severe memory corruption!) during initial CAR boot
+ * in ck804_early_setup_x() on Fam10h systems by not touching 0x78.
+ * Interestingly once the system is fully booted into Linux this can be set, but
+ * not before! Apparently something isn't initialized but the amount of effort
+ * required to fix this is non-negligible and of unknown real-world benefit
+ */
+#else
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0x78), 0xc0ffffff, 0x19000000,
#endif
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe0), 0xfffffeff, 0x00000100,
@@ -239,6 +247,10 @@ static void ck804_early_setup(unsigned ck804_num, unsigned *busn,
RES_PCI_IO, PCI_ADDR(0, 9, 0, 0x4c), 0xfe00ffff, 0x00440000,
RES_PCI_IO, PCI_ADDR(0, 9, 0, 0x74), 0xffffffc0, 0x00000000,
+ /*
+ * Avoid touching 0x78 for CONFIG_NORTHBRIDGE_AMD_AMDFAM10 for
+ * non-primary chains too???
+ */
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0x78), 0xc0ffffff, 0x20000000,
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe0), 0xfffffeff, 0x00000000,
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0xe8), 0xffffff00, 0x000000ff,
diff --git a/src/southbridge/nvidia/mcp55/early_setup_car.c b/src/southbridge/nvidia/mcp55/early_setup_car.c
index 4970a4cf9a..d919610900 100644
--- a/src/southbridge/nvidia/mcp55/early_setup_car.c
+++ b/src/southbridge/nvidia/mcp55/early_setup_car.c
@@ -242,7 +242,17 @@ static void mcp55_early_setup(unsigned mcp55_num, unsigned *busn,
RES_PCI_IO, PCI_ADDR(0, 6, 0, 0x74), 0xFFFFFFC0, 0x00000000,
RES_PCI_IO, PCI_ADDR(0, 6, 0, 0xC0), 0x00000000, 0xCB8410DE,
RES_PCI_IO, PCI_ADDR(0, 6, 0, 0xC4), 0xFFFFFFF8, 0x00000007,
+#if IS_ENABLED(CONFIG_NORTHBRIDGE_AMD_AMDFAM10)
+ /*
+ * Avoid crash (complete with severe memory corruption!) during initial CAR boot
+ * in mcp55_early_setup_x() on Fam10h systems by not touching 0x78.
+ * Interestingly once the system is fully booted into Linux this can be set, but
+ * not before! Apparently something isn't initialized but the amount of effort
+ * required to fix this is non-negligible and of unknown real-world benefit
+ */
+#else
RES_PCI_IO, PCI_ADDR(0, 1, 0, 0x78), 0xC0FFFFFF, 0x19000000,
+#endif
#if CONFIG_MCP55_USE_AZA
RES_PCI_IO, PCI_ADDR(0, 6, 1, 0x40), 0x00000000, 0xCB8410DE,