nb/intel/gm45: Fill in memory info

Fill in memory info so that coreboot can generate SMBIOS Type 17 tables.
The S/N, P/N and module ID fields are only populated for DDR3.

Change-Id: I92060ce05bdf0ca617a3383a2db1fdbd43df6fe4
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/81861
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jean Lucas

src/northbridge/intel/gm45/Makefile.mk

@@ -10,6 +10,7 @@ romstage-y += raminit.c
 romstage-y += raminit_rcomp_calibration.c
 romstage-y += raminit_receive_enable_calibration.c
 romstage-y += raminit_read_write_training.c
+romstage-y += raminit_meminfo.c
 romstage-y += pcie.c
 romstage-y += thermal.c
 romstage-y += igd.c

src/northbridge/intel/gm45/gm45.h

@@ -412,6 +412,7 @@ void enter_raminit_or_reset(void);
 void get_gmch_info(sysinfo_t *);
 void raminit(sysinfo_t *, int s3resume);
 void raminit_thermal(const sysinfo_t *);
+void setup_sdram_meminfo(const sysinfo_t *);
 void init_igd(const sysinfo_t *const);
 void init_pm(const sysinfo_t *, int do_freq_scaling_cfg);
 void igd_compute_ggc(sysinfo_t *const sysinfo);

src/northbridge/intel/gm45/raminit_meminfo.c

@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <cbmem.h>
+#include <console/console.h>
+#include <device/dram/ddr2.h>
+#include <device/dram/ddr3.h>
+#include <device/smbus_host.h>
+#include <lib.h>
+#include <memory_info.h>
+#include <spd.h>
+
+#include "gm45.h"
+#include "chip.h"
+
+static u8 get_dimm_mod_type(const sysinfo_t *sysinfo, const int idx)
+{
+	if (sysinfo->spd_type == DDR2) {
+		return smbus_read_byte(sysinfo->spd_map[idx], 20) & SPD_DDR2_DIMM_TYPE_MASK;
+	} else {
+		return smbus_read_byte(sysinfo->spd_map[idx], 3) & 0xf;
+	}
+}
+
+static void ddr3_read_ids(const sysinfo_t *sysinfo, struct dimm_info *dimm, const int idx)
+{
+	const u8 addr = sysinfo->spd_map[idx];
+	for (int k = 0; k < SPD_DIMM_SERIAL_LEN; k++) {
+		dimm->serial[k] = smbus_read_byte(addr, SPD_DIMM_SERIAL_NUM + k);
+	}
+	for (int k = 0; k < SPD_DIMM_PART_LEN; k++) {
+		dimm->module_part_number[k] = smbus_read_byte(addr, SPD_DIMM_PART_NUM + k);
+	}
+	dimm->mod_id = (smbus_read_byte(addr, SPD_DIMM_MOD_ID2) << 8) |
+		       (smbus_read_byte(addr, SPD_DIMM_MOD_ID1) << 0);
+}
+
+static u32 get_mem_clock_mt(const int clock_index)
+{
+	switch (clock_index) {
+	case MEM_CLOCK_1067MT:	return 1067;
+	case MEM_CLOCK_800MT:	return 800;
+	case MEM_CLOCK_667MT:	return 667;
+	default:		return 0;
+	}
+}
+
+void setup_sdram_meminfo(const sysinfo_t *sysinfo)
+{
+	struct memory_info *mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(struct memory_info));
+	if (!mem_info)
+		die("Failed to add memory info to CBMEM.\n");
+
+	memset(mem_info, 0, sizeof(struct memory_info));
+
+	const u16 ddr_type = (sysinfo->spd_type == DDR2) ? MEMORY_TYPE_DDR2 : MEMORY_TYPE_DDR3;
+	const u32 ddr_freq_mt = get_mem_clock_mt(sysinfo->selected_timings.mem_clock);
+
+	int dimm_cnt = 0;
+
+	int ch;
+	FOR_EACH_POPULATED_CHANNEL(sysinfo->dimms, ch) {
+		struct dimm_info *dimm = &mem_info->dimm[dimm_cnt];
+		const int idx = ch * 2;
+		const int ranks = sysinfo->dimms[ch].ranks;
+		dimm->dimm_size = (256 << sysinfo->dimms[ch].chip_capacity) * ranks;
+		dimm->ddr_type = ddr_type;
+		dimm->ddr_frequency = ddr_freq_mt;
+		dimm->rank_per_dimm = ranks;
+		dimm->channel_num = ch;
+		dimm->dimm_num = 0;
+		dimm->bank_locator = ch;
+		/* TODO: Handle DDR2 SPDs */
+		if (sysinfo->spd_type == DDR3) {
+			ddr3_read_ids(sysinfo, dimm, idx);
+		}
+		dimm->mod_type = get_dimm_mod_type(sysinfo, idx);
+		dimm->bus_width = MEMORY_BUS_WIDTH_64;
+		dimm_cnt++;
+	}
+	mem_info->dimm_cnt = dimm_cnt;
+
+	mem_info->ecc_type = MEMORY_ARRAY_ECC_NONE;
+	mem_info->max_capacity_mib = 8192;
+	mem_info->number_of_devices = 2;
+}

src/northbridge/intel/gm45/romstage.c

@@ -91,6 +91,8 @@ void mainboard_romstage_entry(void)
 
 	cbmem_initted = !cbmem_recovery(s3resume);
 
+	setup_sdram_meminfo(&sysinfo);
+
 	romstage_handoff_init(cbmem_initted && s3resume);
 
 	printk(BIOS_SPEW, "exit main()\n");