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/* SPDX-License-Identifier: GPL-2.0-only */
#include <console/console.h>
#include <console/usb.h>
#include <string.h>
#include <cbmem.h>
#include <cbfs.h>
#include <cf9_reset.h>
#include <ip_checksum.h>
#include <memory_info.h>
#include <mrc_cache.h>
#include <device/pci_def.h>
#include <device/pci_ops.h>
#include <device/dram/ddr3.h>
#include <smbios.h>
#include <spd.h>
#include <security/vboot/vboot_common.h>
#include <commonlib/region.h>
#include "raminit.h"
#include "pei_data.h"
#include "haswell.h"
#define MRC_CACHE_VERSION 1
void save_mrc_data(struct pei_data *pei_data)
{
/* Save the MRC S3 restore data to cbmem */
mrc_cache_stash_data(MRC_TRAINING_DATA, MRC_CACHE_VERSION, pei_data->mrc_output,
pei_data->mrc_output_len);
}
static void prepare_mrc_cache(struct pei_data *pei_data)
{
size_t mrc_size;
/* Preset just in case there is an error */
pei_data->mrc_input = NULL;
pei_data->mrc_input_len = 0;
pei_data->mrc_input =
mrc_cache_current_mmap_leak(MRC_TRAINING_DATA,
MRC_CACHE_VERSION,
&mrc_size);
if (!pei_data->mrc_input)
/* Error message printed in find_current_mrc_cache */
return;
pei_data->mrc_input_len = mrc_size;
printk(BIOS_DEBUG, "%s: at %p, size %zx\n", __func__,
pei_data->mrc_input, mrc_size);
}
static const char *const ecc_decoder[] = {
"inactive",
"active on IO",
"disabled on IO",
"active",
};
/* Print out the memory controller configuration, as per the values in its registers. */
static void report_memory_config(void)
{
int i;
const u32 addr_decoder_common = MCHBAR32(MAD_CHNL);
printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
(MCHBAR32(MC_BIOS_DATA) * 13333 * 2 + 50) / 100);
printk(BIOS_DEBUG, "memcfg channel assignment: A: %d, B % d, C % d\n",
(addr_decoder_common >> 0) & 3,
(addr_decoder_common >> 2) & 3,
(addr_decoder_common >> 4) & 3);
for (i = 0; i < NUM_CHANNELS; i++) {
const u32 ch_conf = MCHBAR32(MAD_DIMM(i));
printk(BIOS_DEBUG, "memcfg channel[%d] config (%8.8x):\n", i, ch_conf);
printk(BIOS_DEBUG, " ECC %s\n", ecc_decoder[(ch_conf >> 24) & 3]);
printk(BIOS_DEBUG, " enhanced interleave mode %s\n",
((ch_conf >> 22) & 1) ? "on" : "off");
printk(BIOS_DEBUG, " rank interleave %s\n",
((ch_conf >> 21) & 1) ? "on" : "off");
printk(BIOS_DEBUG, " DIMMA %d MB width %s %s rank%s\n",
((ch_conf >> 0) & 0xff) * 256,
((ch_conf >> 19) & 1) ? "x16" : "x8 or x32",
((ch_conf >> 17) & 1) ? "dual" : "single",
((ch_conf >> 16) & 1) ? "" : ", selected");
printk(BIOS_DEBUG, " DIMMB %d MB width %s %s rank%s\n",
((ch_conf >> 8) & 0xff) * 256,
((ch_conf >> 20) & 1) ? "x16" : "x8 or x32",
((ch_conf >> 18) & 1) ? "dual" : "single",
((ch_conf >> 16) & 1) ? ", selected" : "");
}
}
/**
* Find PEI executable in coreboot filesystem and execute it.
*
* @param pei_data: configuration data for UEFI PEI reference code
*/
void sdram_initialize(struct pei_data *pei_data)
{
int (*entry)(struct pei_data *pei_data) __attribute__((regparm(1)));
uint32_t type = CBFS_TYPE_MRC;
struct cbfsf f;
printk(BIOS_DEBUG, "Starting UEFI PEI System Agent\n");
/*
* Always pass in mrc_cache data. The driver will determine
* whether to use the data or not.
*/
prepare_mrc_cache(pei_data);
/* If MRC data is not found, we cannot continue S3 resume */
if (pei_data->boot_mode == 2 && !pei_data->mrc_input) {
post_code(POST_RESUME_FAILURE);
printk(BIOS_DEBUG, "Giving up in %s: No MRC data\n", __func__);
system_reset();
}
/* Pass console handler in pei_data */
pei_data->tx_byte = do_putchar;
/*
* Locate and call UEFI System Agent binary. The binary needs to be at a fixed offset
* in the flash and can therefore only reside in the COREBOOT fmap region.
*/
if (cbfs_locate_file_in_region(&f, "COREBOOT", "mrc.bin", &type) < 0)
die("mrc.bin not found!");
/* We don't care about leaking the mapping */
entry = rdev_mmap_full(&f.data);
if (entry) {
int rv = entry(pei_data);
/* The mrc.bin reconfigures USB, so usbdebug needs to be reinitialized */
if (CONFIG(USBDEBUG_IN_PRE_RAM))
usbdebug_hw_init(true);
if (rv) {
switch (rv) {
case -1:
printk(BIOS_ERR, "PEI version mismatch.\n");
break;
case -2:
printk(BIOS_ERR, "Invalid memory frequency.\n");
break;
default:
printk(BIOS_ERR, "MRC returned %x.\n", rv);
}
die_with_post_code(POST_INVALID_VENDOR_BINARY,
"Nonzero MRC return value.\n");
}
} else {
die("UEFI PEI System Agent not found.\n");
}
/* Print the MRC version after executing the UEFI PEI stage */
u32 version = MCHBAR32(MRC_REVISION);
printk(BIOS_DEBUG, "MRC Version %d.%d.%d Build %d\n",
(version >> 24) & 0xff, (version >> 16) & 0xff,
(version >> 8) & 0xff, (version >> 0) & 0xff);
report_memory_config();
}
static bool nb_supports_ecc(const uint32_t capid0_a)
{
return !(capid0_a & CAPID_ECCDIS);
}
static uint16_t nb_slots_per_channel(const uint32_t capid0_a)
{
return !(capid0_a & CAPID_DDPCD) + 1;
}
static uint16_t nb_number_of_channels(const uint32_t capid0_a)
{
return !(capid0_a & CAPID_PDCD) + 1;
}
static uint32_t nb_max_chan_capacity_mib(const uint32_t capid0_a)
{
uint32_t ddrsz;
/* Values from documentation, which assume two DIMMs per channel */
switch (CAPID_DDRSZ(capid0_a)) {
case 1:
ddrsz = 8192;
break;
case 2:
ddrsz = 2048;
break;
case 3:
ddrsz = 512;
break;
default:
ddrsz = 16384;
break;
}
/* Account for the maximum number of DIMMs per channel */
return (ddrsz / 2) * nb_slots_per_channel(capid0_a);
}
void setup_sdram_meminfo(struct pei_data *pei_data)
{
struct memory_info *mem_info;
struct dimm_info *dimm;
int ch, d_num;
int dimm_cnt = 0;
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 u32 ddr_frequency = (MCHBAR32(MC_BIOS_DATA) * 13333 * 2 + 50) / 100;
for (ch = 0; ch < NUM_CHANNELS; ch++) {
const u32 ch_conf = MCHBAR32(MAD_DIMM(ch));
/* DIMMs A/B */
for (d_num = 0; d_num < NUM_SLOTS; d_num++) {
const u32 dimm_size = ((ch_conf >> (d_num * 8)) & 0xff) * 256;
if (dimm_size) {
dimm = &mem_info->dimm[dimm_cnt];
dimm->dimm_size = dimm_size;
dimm->ddr_type = MEMORY_TYPE_DDR3;
dimm->ddr_frequency = ddr_frequency;
dimm->rank_per_dimm = 1 + ((ch_conf >> (17 + d_num)) & 1);
dimm->channel_num = ch;
dimm->dimm_num = d_num;
dimm->bank_locator = ch * 2;
memcpy(dimm->serial,
&pei_data->spd_data[dimm_cnt][SPD_DIMM_SERIAL_NUM],
SPD_DIMM_SERIAL_LEN);
memcpy(dimm->module_part_number,
&pei_data->spd_data[dimm_cnt][SPD_DIMM_PART_NUM],
SPD_DIMM_PART_LEN);
dimm->mod_id =
(pei_data->spd_data[dimm_cnt][SPD_DIMM_MOD_ID2] << 8) |
(pei_data->spd_data[dimm_cnt][SPD_DIMM_MOD_ID1] & 0xff);
dimm->mod_type = SPD_SODIMM;
dimm->bus_width = MEMORY_BUS_WIDTH_64;
dimm_cnt++;
}
}
}
mem_info->dimm_cnt = dimm_cnt;
const uint32_t capid0_a = pci_read_config32(HOST_BRIDGE, CAPID0_A);
const uint16_t channels = nb_number_of_channels(capid0_a);
mem_info->ecc_capable = nb_supports_ecc(capid0_a);
mem_info->max_capacity_mib = channels * nb_max_chan_capacity_mib(capid0_a);
mem_info->number_of_devices = channels * nb_slots_per_channel(capid0_a);
}
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