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From 1786c1ae0d378df7f2a0f99e13d32df619e0f010 Mon Sep 17 00:00:00 2001
From: Timothy Pearson <kb9vqf@pearsoncomputing.net>
Date: Wed, 10 Jun 2015 10:46:17 -0500
Subject: [PATCH 055/146] northbridge/amd/amdmct: Verify MCT NVRAM options
before skipping training
---
src/northbridge/amd/amdmct/mct_ddr3/mct_d.c | 5 +++-
src/northbridge/amd/amdmct/mct_ddr3/mct_d.h | 2 ++
src/northbridge/amd/amdmct/mct_ddr3/s3utils.c | 36 ++++++++++++++++++++++++-
src/northbridge/amd/amdmct/mct_ddr3/s3utils.h | 3 ++-
4 files changed, 43 insertions(+), 3 deletions(-)
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
index 6d8c23e..e493158 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
@@ -4119,7 +4119,7 @@ static void mct_preInitDCT(struct MCTStatStruc *pMCTstat,
calculate_and_store_spd_hashes(pMCTstat, pDCTstat);
#if IS_ENABLED(CONFIG_HAVE_ACPI_RESUME)
- if (load_spd_hashes_from_nvram(pDCTstat) < 0) {
+ if (load_spd_hashes_from_nvram(pMCTstat, pDCTstat) < 0) {
pDCTstat->spd_data.nvram_spd_match = 0;
}
else {
@@ -4134,6 +4134,9 @@ static void mct_preInitDCT(struct MCTStatStruc *pMCTstat,
if (get_option(&nvram, "allow_spd_nvram_cache_restore") == CB_SUCCESS)
allow_config_restore = !!nvram;
+ if (pMCTstat->nvram_checksum != calculate_nvram_mct_hash())
+ allow_config_restore = 0;
+
if (!allow_config_restore)
pDCTstat->spd_data.nvram_spd_match = 0;
}
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h
index adf89b2..11555ae 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h
+++ b/src/northbridge/amd/amdmct/mct_ddr3/mct_d.h
@@ -301,6 +301,7 @@ struct MCTStatStruc {
u32 Sub4GCacheTop; /* If not zero, the 32-bit top of cacheable memory.*/
u32 SysLimit; /* LIMIT[39:8] (system address)*/
uint32_t TSCFreq;
+ uint16_t nvram_checksum;
} __attribute__((packed));
/*=============================================================================
@@ -796,6 +797,7 @@ struct amd_s3_persistent_node_data {
struct amd_s3_persistent_data {
struct amd_s3_persistent_node_data node[MAX_NODES_SUPPORTED];
+ uint16_t nvram_checksum;
} __attribute__((packed));
/*===============================================================================
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c
index 4c0e58d..2132648 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c
+++ b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.c
@@ -143,6 +143,36 @@ void calculate_spd_hash(uint8_t *spd_data, uint64_t *spd_hash)
*spd_hash = *spd_hash ^ (*spd_hash << 37);
}
+uint16_t calculate_nvram_mct_hash(void)
+{
+ uint32_t nvram;
+ uint16_t ret;
+
+ ret = 0;
+ if (get_option(&nvram, "max_mem_clock") == CB_SUCCESS)
+ ret |= nvram & 0xf;
+ if (get_option(&nvram, "minimum_memory_voltage") == CB_SUCCESS)
+ ret |= (nvram & 0x3) << 4;
+ if (get_option(&nvram, "ECC_memory") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 6;
+ if (get_option(&nvram, "ECC_redirection") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 7;
+ if (get_option(&nvram, "ecc_scrub_rate") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 8;
+ if (get_option(&nvram, "interleave_chip_selects") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 9;
+ if (get_option(&nvram, "interleave_nodes") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 10;
+ if (get_option(&nvram, "interleave_memory_channels") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 11;
+ if (get_option(&nvram, "cpu_c_states") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 12;
+ if (get_option(&nvram, "cpu_cc6_state") == CB_SUCCESS)
+ ret |= (nvram & 0x1) << 13;
+
+ return ret;
+}
+
static struct amd_s3_persistent_data * map_s3nv_in_nvram(void)
{
ssize_t s3nv_offset;
@@ -173,7 +203,7 @@ static struct amd_s3_persistent_data * map_s3nv_in_nvram(void)
}
#ifdef __PRE_RAM__
-int8_t load_spd_hashes_from_nvram(struct DCTStatStruc *pDCTstat)
+int8_t load_spd_hashes_from_nvram(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCTstat)
{
struct amd_s3_persistent_data *persistent_data;
@@ -184,6 +214,8 @@ int8_t load_spd_hashes_from_nvram(struct DCTStatStruc *pDCTstat)
memcpy(pDCTstat->spd_data.nvram_spd_hash, persistent_data->node[pDCTstat->Node_ID].spd_hash, sizeof(pDCTstat->spd_data.nvram_spd_hash));
memcpy(pDCTstat->spd_data.nvram_memclk, persistent_data->node[pDCTstat->Node_ID].memclk, sizeof(pDCTstat->spd_data.nvram_memclk));
+ pMCTstat->nvram_checksum = persistent_data->nvram_checksum;
+
return 0;
}
#endif
@@ -237,6 +269,8 @@ static void copy_cbmem_spd_data_to_save_variable(struct amd_s3_persistent_data*
for (channel = 0; channel < 2; channel++)
persistent_data->node[node].memclk[channel] = mem_info->dct_stat[node].Speed;
+ persistent_data->nvram_checksum = calculate_nvram_mct_hash();
+
if (restored) {
if (mem_info->mct_stat.GStatus & (1 << GSB_ConfigRestored))
*restored = 1;
diff --git a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.h b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.h
index 82f73a7..74922c4 100644
--- a/src/northbridge/amd/amdmct/mct_ddr3/s3utils.h
+++ b/src/northbridge/amd/amdmct/mct_ddr3/s3utils.h
@@ -21,9 +21,10 @@
#include "mct_d.h"
void calculate_spd_hash(uint8_t *spd_data, uint64_t *spd_hash);
+uint16_t calculate_nvram_mct_hash(void);
#ifdef __PRE_RAM__
-int8_t load_spd_hashes_from_nvram(struct DCTStatStruc *pDCTstat);
+int8_t load_spd_hashes_from_nvram(struct MCTStatStruc *pMCTstat, struct DCTStatStruc *pDCTstat);
#endif
#ifdef __RAMSTAGE__
--
1.7.9.5
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