diff options
| author | Jonathan A. Kollasch <jakllsch@kollasch.net> | 2015-07-20 09:51:34 -0500 |
|---|---|---|
| committer | Jonathan A. Kollasch <jakllsch@kollasch.net> | 2015-07-23 18:30:19 +0200 |
| commit | acba73aefcbd7dacb547b61570a1836b745be2e5 (patch) | |
| tree | 098ebd932670930651541536405d1f9b4548161d /src/mainboard/asus/kfsn4-dre | |
| parent | ff40196c6c5a83b7cf2ceeb2dd027d4f2587b94a (diff) | |
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/mainboard/asus/kfsn4-dre')
| -rw-r--r-- | src/mainboard/asus/kfsn4-dre/romstage.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/src/mainboard/asus/kfsn4-dre/romstage.c b/src/mainboard/asus/kfsn4-dre/romstage.c index aa72021d8d..cf36a7265c 100644 --- a/src/mainboard/asus/kfsn4-dre/romstage.c +++ b/src/mainboard/asus/kfsn4-dre/romstage.c @@ -67,15 +67,6 @@ static inline int spd_read_byte(unsigned device, unsigned address) #include "resourcemap.c" #include "cpu/amd/quadcore/quadcore.c" -/* - * Avoid crash (complete with severe memory corruption!) during initial CAR boot - * in ck804_early_setup_x(). - * 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 - */ -#define CK804_SKIP_PCI_REG_78_INIT 1 - #define CK804_MB_SETUP \ RES_PORT_IO_8, SYSCTRL_IO_BASE + 0xc0+33, ~(0x0f),(0x04 | 0x01), /* -ENOINFO Proprietary BIOS sets this register; "When in Rome..."*/ |