diff options
| author | Timothy Pearson <tpearson@raptorengineeringinc.com> | 2015-02-14 16:40:20 -0600 |
|---|---|---|
| committer | Alexandru Gagniuc <mr.nuke.me@gmail.com> | 2015-02-15 17:54:35 +0100 |
| commit | 068ca9c8fc46f1731aa51cd23b1f36392ffd8333 (patch) | |
| tree | 8fc9a75f47df4920c8bc0663ca82e21e29ce3b67 /src/northbridge/amd | |
| parent | eb605d72b2331025b417500fa78d3d82d16ebfcf (diff) | |
northbridge/amd/amdmct: Allow override of memory settings via NVRAM
This patch allows the following memory controller settings to be overridden in NVRAM:
Memory frequency limit
ECC enable
ECC scrub rate
Change-Id: Ibfde3d888b0f81a29a14af2d142171510b87655e
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/8438
Tested-by: build bot (Jenkins)
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Diffstat (limited to 'src/northbridge/amd')
| -rw-r--r-- | src/northbridge/amd/amdmct/wrappers/mcti_d.c | 46 |
1 files changed, 42 insertions, 4 deletions
diff --git a/src/northbridge/amd/amdmct/wrappers/mcti_d.c b/src/northbridge/amd/amdmct/wrappers/mcti_d.c index 3615676d1b..4df2a16549 100644 --- a/src/northbridge/amd/amdmct/wrappers/mcti_d.c +++ b/src/northbridge/amd/amdmct/wrappers/mcti_d.c @@ -20,9 +20,23 @@ /* Call-backs */ #include <delay.h> +#define NVRAM_DDR2_800 0 +#define NVRAM_DDR2_667 1 +#define NVRAM_DDR2_533 2 +#define NVRAM_DDR2_400 3 + +#define NVRAM_DDR3_1600 0 +#define NVRAM_DDR3_1333 1 +#define NVRAM_DDR3_1066 2 +#define NVRAM_DDR3_800 3 + +static const uint16_t ddr2_limits[4] = {400, 333, 266, 200}; +static const uint16_t ddr3_limits[4] = {800, 666, 533, 400}; + static u16 mctGet_NVbits(u8 index) { u16 val = 0; + int nvram; switch (index) { case NV_PACK_TYPE: @@ -45,10 +59,16 @@ static u16 mctGet_NVbits(u8 index) break; case NV_MAX_MEMCLK: /* Maximum platform supported memclk */ - //val = 200; /* 200MHz(DDR400) */ - //val = 266; /* 266MHz(DDR533) */ - //val = 333; /* 333MHz(DDR667) */ - val = MEM_MAX_LOAD_FREQ; /* 400MHz(DDR800) */ + val = MEM_MAX_LOAD_FREQ; + + if (get_option(&nvram, "max_mem_clock") == CB_SUCCESS) { + int limit = val; + if (IS_ENABLED(CONFIG_DIMM_DDR3)) + limit = ddr3_limits[nvram & 3]; + else if (IS_ENABLED(CONFIG_DIMM_DDR2)) + limit = ddr2_limits[nvram & 3]; + val = min(limit, val); + } break; case NV_ECC_CAP: #if SYSTEM_TYPE == SERVER @@ -91,6 +111,9 @@ static u16 mctGet_NVbits(u8 index) /* Bank (chip select) interleaving */ //val = 0; /* disabled */ val = 1; /* enabled (recommended) */ + + if (get_option(&nvram, "interleave_chip_selects") == CB_SUCCESS) + val = !!nvram; break; case NV_MemHole: //val = 0; /* Disabled */ @@ -111,6 +134,9 @@ static u16 mctGet_NVbits(u8 index) case NV_NodeIntlv: val = 0; /* Disabled (recommended) */ //val = 1; /* Enable */ + + if (get_option(&nvram, "interleave_nodes") == CB_SUCCESS) + val = !!nvram; break; case NV_BurstLen32: #if !CONFIG_GFXUMA @@ -151,6 +177,9 @@ static u16 mctGet_NVbits(u8 index) #else val = 0; /* Disable */ #endif + + if (get_option(&nvram, "ECC_memory") == CB_SUCCESS) + val = !!nvram; break; case NV_NBECC: #if (SYSTEM_TYPE == SERVER) @@ -172,6 +201,9 @@ static u16 mctGet_NVbits(u8 index) * 1: Enable */ val = CONFIG_AMDMCT_ENABLE_ECC_REDIR; + + if (get_option(&nvram, "ECC_redirection") == CB_SUCCESS) + val = !!nvram; break; case NV_DramBKScrub: /* @@ -200,6 +232,9 @@ static u16 mctGet_NVbits(u8 index) * 0x16: 84ms */ val = CONFIG_AMDMCT_BACKGROUND_SCRUB_RATE; + + if ((get_option(&nvram, "ecc_scrub_rate") == CB_SUCCESS) && (nvram <= 0x16)) + val = nvram; break; case NV_L2BKScrub: val = 0; /* Disabled - See L2Scrub in BKDG */ @@ -219,6 +254,9 @@ static u16 mctGet_NVbits(u8 index) /* channel interleave is better performance than ganged mode at this time */ val = 1; /* Enabled */ //val = 0; /* Disabled */ + + if (get_option(&nvram, "interleave_memory_channels") == CB_SUCCESS) + val = !!nvram; break; case NV_ChannelIntlv: val = 5; /* Not currently checked in mctchi_d.c */ |