Timothy Pearson (tpearson@raptorengineeringinc.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/10427
-gerrit
commit 20654ae0b167a411b2fb1b715e8c7cd2098dba17 Author: Timothy Pearson tpearson@raptorengineeringinc.com Date: Thu Jun 4 13:34:23 2015 -0500
northbridge/amd/amdmct: Honor MMCONF_BASE_ADDRESS
The MMIO hole start address was hardcoded on AMD Family 10h systems. Use the MMCONF_BASE_ADDRESS Kconfig setting instead.
Change-Id: I204e904d96d14e99529fa5e524fd73e6ea256dc0 Signed-off-by: Timothy Pearson tpearson@raptorengineeringinc.com --- src/northbridge/amd/amdmct/wrappers/mcti_d.c | 26 ++++++++++++++++++-------- 1 file changed, 18 insertions(+), 8 deletions(-)
diff --git a/src/northbridge/amd/amdmct/wrappers/mcti_d.c b/src/northbridge/amd/amdmct/wrappers/mcti_d.c index 1706fce..ea32893 100644 --- a/src/northbridge/amd/amdmct/wrappers/mcti_d.c +++ b/src/northbridge/amd/amdmct/wrappers/mcti_d.c @@ -31,6 +31,18 @@ #define NVRAM_DDR3_1066 2 #define NVRAM_DDR3_800 3
+/* The recommended maximum GFX Upper Memory Area + * size is 256M, however, to be on the safe side + * move TOM down by 512M. + */ +#define MAXIMUM_GFXUMA_SIZE 0x20000000 + +/* Do not allow less than 16M of DRAM in 32-bit space. + * This number is not hardware constrained and can be + * changed as needed. + */ +#define MINIMUM_DRAM_BELOW_4G 0x1000000 + static const uint16_t ddr2_limits[4] = {400, 333, 266, 200}; static const uint16_t ddr3_limits[4] = {800, 666, 533, 400};
@@ -159,17 +171,15 @@ static u16 mctGet_NVbits(u8 index) //val = 1; /* enable */ break; case NV_BottomIO: -#if !CONFIG_GFXUMA - val = 0xE0; /* address bits [31:24] */ -#elif CONFIG_GFXUMA - val = 0xC0; /* address bits [31:24] */ -#endif - break; case NV_BottomUMA: + /* address bits [31:24] */ #if !CONFIG_GFXUMA - val = 0xE0; /* address bits [31:24] */ + val = (CONFIG_MMCONF_BASE_ADDRESS >> 24); #elif CONFIG_GFXUMA - val = 0xC0; /* address bits [31:24] */ + #if (CONFIG_MMCONF_BASE_ADDRESS < (MAXIMUM_GFXUMA_SIZE + MINIMUM_DRAM_BELOW_4G)) + #error "MMCONF_BASE_ADDRESS is too small" + #endif + val = ((CONFIG_MMCONF_BASE_ADDRESS - MAXIMUM_GFXUMA_SIZE) >> 24); #endif break; case NV_ECC: