diff options
Diffstat (limited to 'resources/libreboot/patch/kgpe-d16/0048-northbridge-amd-amdmct-Skip-DCT-config-write-to-Flas.patch')
| -rw-r--r-- | resources/libreboot/patch/kgpe-d16/0048-northbridge-amd-amdmct-Skip-DCT-config-write-to-Flas.patch | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/resources/libreboot/patch/kgpe-d16/0048-northbridge-amd-amdmct-Skip-DCT-config-write-to-Flas.patch b/resources/libreboot/patch/kgpe-d16/0048-northbridge-amd-amdmct-Skip-DCT-config-write-to-Flas.patch new file mode 100644 index 00000000..a3de30df --- /dev/null +++ b/resources/libreboot/patch/kgpe-d16/0048-northbridge-amd-amdmct-Skip-DCT-config-write-to-Flas.patch @@ -0,0 +1,103 @@ +From e513231d8e07299c740ef0cb8750816d5ac69998 Mon Sep 17 00:00:00 2001 +From: Timothy Pearson <tpearson@raptorengineeringinc.com> +Date: Mon, 8 Jun 2015 19:54:56 -0500 +Subject: [PATCH 048/143] northbridge/amd/amdmct: Skip DCT config write to + Flash if unchanged + +Change-Id: I5fee5f5fdf30ab6e3c4f94ed3e54ea66c1204352 +Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> +--- + src/northbridge/amd/amdmct/mct_ddr3/mct_d.c | 3 +++ + src/northbridge/amd/amdmct/mct_ddr3/mct_d.h | 1 + + src/northbridge/amd/amdmct/mct_ddr3/s3utils.c | 21 +++++++++++++++++++-- + 3 files changed, 23 insertions(+), 2 deletions(-) + +diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c +index 4044c36..3edce9e 100644 +--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c ++++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c +@@ -1361,6 +1361,7 @@ restartinit: + #if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME) + printk(BIOS_DEBUG, "mctAutoInitMCT_D: Restoring DCT configuration from NVRAM\n"); + restore_mct_information_from_nvram(0); ++ pMCTstat->GStatus |= 1 << GSB_ConfigRestored; + #endif + + printk(BIOS_DEBUG, "mctAutoInitMCT_D: mct_ForceNBPState0_Dis_Fam15\n"); +@@ -2087,6 +2088,8 @@ static void DQSTiming_D(struct MCTStatStruc *pMCTstat, + + if (is_fam15h()) + exit_training_mode_fam15(pMCTstat, pDCTstatA); ++ ++ pMCTstat->GStatus |= 1 << GSB_ConfigRestored; + } + + /* FIXME - currently uses calculated value TrainMaxReadLatency_D(pMCTstat, pDCTstatA); */ +diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h +index 539ecc3..adf89b2 100644 +--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h ++++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h +@@ -316,6 +316,7 @@ struct MCTStatStruc { + #define GSB_SpIntRemapHole 16 /* Special condition for Node Interleave and HW remapping*/ + #define GSB_EnDIMMSpareNW 17 /* Indicates that DIMM Spare can be used without a warm reset */ + /* NOTE: This is a local bit used by memory code */ ++#define GSB_ConfigRestored 18 /* Training configuration was restored from NVRAM */ + + /*=============================================================================== + Local DCT Status structure (a structure for each DCT) +diff --git a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c +index 83c7b02..1e5c1a0 100644 +--- a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c ++++ b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c +@@ -213,7 +213,7 @@ static uint32_t read_config32_dct_nbpstate(device_t dev, uint8_t node, uint8_t d + return pci_read_config32(dev, reg); + } + +-static void copy_cbmem_spd_data_to_save_variable(struct amd_s3_persistent_data* persistent_data) ++static void copy_cbmem_spd_data_to_save_variable(struct amd_s3_persistent_data* persistent_data, uint8_t * restored) + { + uint8_t node; + uint8_t dimm; +@@ -236,6 +236,13 @@ static void copy_cbmem_spd_data_to_save_variable(struct amd_s3_persistent_data* + for (node = 0; node < MAX_NODES_SUPPORTED; node++) + for (channel = 0; channel < 2; channel++) + persistent_data->node[node].memclk[channel] = mem_info->dct_stat[node].Speed; ++ ++ if (restored) { ++ if (mem_info->mct_stat.GStatus & (1 << GSB_ConfigRestored)) ++ *restored = 1; ++ else ++ *restored = 0; ++ } + } + + void copy_mct_data_to_save_variable(struct amd_s3_persistent_data* persistent_data) +@@ -1034,6 +1041,7 @@ void restore_mct_data_from_save_variable(struct amd_s3_persistent_data* persiste + int8_t save_mct_information_to_nvram(void) + { + uint8_t nvram; ++ uint8_t restored = 0; + + if (acpi_is_wakeup_s3()) + return 0; +@@ -1055,7 +1063,16 @@ int8_t save_mct_information_to_nvram(void) + copy_mct_data_to_save_variable(persistent_data); + + /* Save RAM SPD data at the same time */ +- copy_cbmem_spd_data_to_save_variable(persistent_data); ++ copy_cbmem_spd_data_to_save_variable(persistent_data, &restored); ++ ++ if (restored) { ++ /* Allow training bypass if DIMM configuration is unchanged on next boot */ ++ nvram = 1; ++ set_option("allow_spd_nvram_cache_restore", &nvram); ++ ++ printk(BIOS_DEBUG, "Hardware configuration unchanged since last boot; skipping write\n"); ++ return 0; ++ } + + /* Obtain CBFS file offset */ + s3nv_offset = get_s3nv_file_offset(); +-- +1.7.9.5 + |