Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10402
-gerrit
commit 7f939e96ff0d26dee9d2040ee8a77d2a0ba6cc82 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Tue Jun 2 13:53:25 2015 -0500
cpu/amd/car: Increase Family 10h CAR size limit to 128k
This resolves issues with 4-node (32-core) systems not having sufficient CAR memory available to boot.
Change-Id: Ie884556edc5c85c2c908a8c6640eeec11594ba3a Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/cpu/amd/car/cache_as_ram.inc | 25 +++++++++++++++++++++++-- src/cpu/amd/car/disable_cache_as_ram.c | 7 +++++++ 2 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/src/cpu/amd/car/cache_as_ram.inc b/src/cpu/amd/car/cache_as_ram.inc index 769e5cf..e563d67 100644 --- a/src/cpu/amd/car/cache_as_ram.inc +++ b/src/cpu/amd/car/cache_as_ram.inc @@ -3,6 +3,7 @@ * * Copyright (C) 2005-2007 Advanced Micro Devices, Inc. * Copyright (C) 2008 Carl-Daniel Hailfinger + * Copyright (C) 2015 Timothy Pearson tpearson@raptorengineeringinc.com, Raptor Engineering * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -249,8 +250,14 @@ clear_fixed_var_mtrr_out: */ .endm
-#if CacheSize > 0x10000 -#error Invalid CAR size, must be at most 64k. +#if IS_ENABLED(CONFIG_CPU_AMD_MODEL_10XXX) + #if CacheSize > 0x80000 + #error Invalid CAR size, must be at most 128k (processor limit is 512k). + #endif +#else + #if CacheSize > 0x10000 + #error Invalid CAR size, must be at most 64k. + #endif #endif #if CacheSize < 0x1000 #error Invalid CAR size, must be at least 4k. This is a processor limitation. @@ -266,6 +273,20 @@ clear_fixed_var_mtrr_out: wrmsr #endif
+#if CacheSize > 0x10000 + /* Enable caching for 64K-96K using fixed MTRR. */ + movl $MTRRfix4K_D0000_MSR, %ecx + simplemask CacheSize, 0x10000 + wrmsr +#endif + +#if CacheSize > 0x18000 + /* Enable caching for 96K-128K using fixed MTRR. */ + movl $MTRRfix4K_D8000_MSR, %ecx + simplemask CacheSize, 0x18000 + wrmsr +#endif + /* Enable caching for 0-32K using fixed MTRR. */ movl $MTRRfix4K_C8000_MSR, %ecx simplemask CacheSize, 0 diff --git a/src/cpu/amd/car/disable_cache_as_ram.c b/src/cpu/amd/car/disable_cache_as_ram.c index 4a86280..d3a3812 100644 --- a/src/cpu/amd/car/disable_cache_as_ram.c +++ b/src/cpu/amd/car/disable_cache_as_ram.c @@ -4,6 +4,7 @@ * original idea yhlu 6.2005 (assembler code) * * Copyright (C) 2010 Rudolf Marek r.marek@assembler.cz + * Copyright (C) 2015 Timothy Pearson tpearson@raptorengineeringinc.com, Raptor Engineering * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -36,6 +37,12 @@ static inline __attribute__((always_inline)) void disable_cache_as_ram(void) #if CONFIG_DCACHE_RAM_SIZE > 0x8000 wrmsr(MTRRfix4K_C0000_MSR, msr); #endif +#if CONFIG_DCACHE_RAM_SIZE > 0x10000 + wrmsr(MTRRfix4K_D0000_MSR, msr); +#endif +#if CONFIG_DCACHE_RAM_SIZE > 0x18000 + wrmsr(MTRRfix4K_D8000_MSR, msr); +#endif /* disable fixed mtrr from now on, it will be enabled by ramstage again*/
msr = rdmsr(SYSCFG_MSR);