New patch to review for coreboot: nb/intel/sandybridge/raminit: Fill SMBIOS type17 info

[Patrick Rudolph]

Patrick Rudolph ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13852

-gerrit

commit 1b23f80902ae38ae9b597d582750b5a927bffbfc
Author: Patrick Rudolph <[e-mail]>
Date:   Sun Feb 28 15:24:04 2016 +0100

    nb/intel/sandybridge/raminit: Fill SMBIOS type17 info
    
    Fill minimal info required for SMBIOS type 17.
    Report DIMM size, channel, rank and DDR speed.
    Allows dmidecode to print the current RAM configuration.
    
    Move report_memory_config() to make sure cbmem
    is initialized to prevent system hang.
    
    Test system:
     * Gigabyte GA-B75M-D3H
     * Intel Pentium CPU G2130
     * Linux 4.3
     * dmidecode 3.0
    
    Change-Id: I4e5f772d68484b9cb178ca8a1d63ad99839f3993
    Signed-off-by: Patrick Rudolph <[e-mail]>
---
 src/northbridge/intel/sandybridge/raminit.c | 60 ++++++++++++++++++++++++-----
 1 file changed, 51 insertions(+), 9 deletions(-)

diff --git a/src/northbridge/intel/sandybridge/raminit.c b/src/northbridge/intel/sandybridge/raminit.c
index 40089e2..eb21933 100644
--- a/src/northbridge/intel/sandybridge/raminit.c
+++ b/src/northbridge/intel/sandybridge/raminit.c
@@ -27,6 +27,8 @@
 #include <timestamp.h>
 #include <pc80/mc146818rtc.h>
 #include <device/pci_def.h>
+#include <memory_info.h>
+#include <smbios.h>
 #include "raminit_native.h"
 #include "sandybridge.h"
 #include <delay.h>
@@ -239,22 +241,36 @@ static void toggle_io_reset(void) {
 static void report_memory_config(void)
 {
 	u32 addr_decoder_common, addr_decode_ch[NUM_CHANNELS];
-	int i;
+	struct memory_info *mem_info;
+	int channel;
+	uint16_t ddr_freq;
+	struct dimm_info *dimm;
 
 	addr_decoder_common = MCHBAR32(0x5000);
 	addr_decode_ch[0] = MCHBAR32(0x5004);
 	addr_decode_ch[1] = MCHBAR32(0x5008);
 
-	printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
-	       (MCHBAR32(0x5e04) * 13333 * 2 + 50) / 100);
+	/*
+	 * Allocate CBMEM area for DIMM information used to populate SMBIOS
+	 * table 17
+	 */
+	mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(*mem_info));
+	printk(BIOS_DEBUG, "CBMEM entry for DIMM info: 0x%p\n", mem_info);
+	if (mem_info)
+		memset(mem_info, 0, sizeof(*mem_info));
+
+	ddr_freq = (MCHBAR32(0x5e04) * 13333 * 2 + 50) / 100;
+
+	printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n", ddr_freq);
 	printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
 	       addr_decoder_common & 3, (addr_decoder_common >> 2) & 3,
 	       (addr_decoder_common >> 4) & 3);
 
-	for (i = 0; i < ARRAY_SIZE(addr_decode_ch); i++) {
-		u32 ch_conf = addr_decode_ch[i];
-		printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n", i,
-		       ch_conf);
+	for (channel = 0; channel < ARRAY_SIZE(addr_decode_ch); channel++) {
+		u32 ch_conf = addr_decode_ch[channel];
+
+		printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n",
+			   channel, ch_conf);
 		printk(BIOS_DEBUG, "   ECC %s\n",
 		       ecc_decoder[(ch_conf >> 24) & 3]);
 		printk(BIOS_DEBUG, "   enhanced interleave mode %s\n",
@@ -271,6 +287,32 @@ static void report_memory_config(void)
 		       ((ch_conf >> 20) & 1) ? 16 : 8,
 		       ((ch_conf >> 18) & 1) ? "dual" : "single",
 		       ((ch_conf >> 16) & 1) ? ", selected" : "");
+
+		if (!mem_info)
+			continue;
+
+		if ((ch_conf >> 0) & 0xff) {
+			dimm = &mem_info->dimm[mem_info->dimm_cnt];
+			dimm->ddr_type = MEMORY_TYPE_DDR3;
+			dimm->ddr_frequency = ddr_freq;
+			dimm->dimm_size = ((ch_conf >> 0) & 0xff) * 256;
+			dimm->channel_num = channel;
+			dimm->rank_per_dimm = ((ch_conf >> 17) & 1) + 1;
+			dimm->dimm_num = 0;
+			dimm->bus_width = ((ch_conf >> 19) & 1) ? 16 : 8;
+			mem_info->dimm_cnt++;
+		}
+		if ((ch_conf >> 8) & 0xff) {
+			dimm = &mem_info->dimm[mem_info->dimm_cnt];
+			dimm->ddr_type = MEMORY_TYPE_DDR3;
+			dimm->ddr_frequency = ddr_freq;
+			dimm->dimm_size = ((ch_conf >> 8) & 0xff) * 256;
+			dimm->channel_num = channel;
+			dimm->rank_per_dimm = ((ch_conf >> 18) & 1) + 1;
+			dimm->dimm_num = 1;
+			dimm->bus_width = ((ch_conf >> 20) & 1) ? 16 : 8;
+			mem_info->dimm_cnt++;
+		}
 	}
 }
 
@@ -4055,8 +4097,6 @@ void init_dram_ddr3(spd_raw_data * spds, int mobile, int min_tck,
 	intel_early_me_init_done(ME_INIT_STATUS_SUCCESS);
 	intel_early_me_status();
 
-	report_memory_config();
-
 	cbmem_was_inited = !cbmem_recovery(s3resume);
 	if (!s3resume)
 		save_timings(&ctrl);
@@ -4065,6 +4105,8 @@ void init_dram_ddr3(spd_raw_data * spds, int mobile, int min_tck,
 		outb(0x6, 0xcf9);
 		halt();
 	}
+
+	report_memory_config();
 }
 
 #define HOST_BRIDGE	PCI_DEVFN(0, 0)