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/* SPDX-License-Identifier: GPL-2.0-only */
#include <assert.h>
#include <cbfs.h>
#include <cbmem.h>
#include <cf9_reset.h>
#include <console/console.h>
#include <device/pci_def.h>
#include <memory_info.h>
#include <mrc_cache.h>
#include <string.h>
#include <soc/iomap.h>
#include <soc/pei_data.h>
#include <soc/pei_wrapper.h>
#include <soc/pm.h>
#include <soc/romstage.h>
#include <soc/systemagent.h>
#include <timestamp.h>
static void save_mrc_data(struct pei_data *pei_data)
{
printk(BIOS_DEBUG, "MRC data at %p %d bytes\n", pei_data->data_to_save,
pei_data->data_to_save_size);
if (pei_data->data_to_save != NULL && pei_data->data_to_save_size > 0)
mrc_cache_stash_data(MRC_TRAINING_DATA, 0,
pei_data->data_to_save,
pei_data->data_to_save_size);
}
static const char *const ecc_decoder[] = {
"inactive",
"active on IO",
"disabled on IO",
"active",
};
/*
* Dump in the log memory controller configuration as read from the memory
* controller registers.
*/
static void report_memory_config(void)
{
int i;
const u32 addr_decoder_common = mchbar_read32(MAD_CHNL);
printk(BIOS_DEBUG, "memcfg DDR3 clock %d MHz\n",
(mchbar_read32(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 = mchbar_read32(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.
*/
static void sdram_initialize(struct pei_data *pei_data)
{
size_t mrc_size;
pei_wrapper_entry_t entry;
int ret;
broadwell_fill_pei_data(pei_data);
/* Assume boot device is memory mapped. */
assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED));
pei_data->saved_data =
mrc_cache_current_mmap_leak(MRC_TRAINING_DATA, 0,
&mrc_size);
if (pei_data->saved_data) {
/* MRC cache found */
pei_data->saved_data_size = mrc_size;
} else if (pei_data->boot_mode == ACPI_S3) {
/* Waking from S3 and no cache. */
printk(BIOS_DEBUG,
"No MRC cache found in S3 resume path.\n");
post_code(POSTCODE_RESUME_FAILURE);
system_reset();
} else {
printk(BIOS_DEBUG, "No MRC cache found.\n");
}
/*
* Do not use saved pei data. Can be set by mainboard romstage
* to force a full train of memory on every boot.
*/
if (pei_data->disable_saved_data) {
printk(BIOS_DEBUG, "Disabling PEI saved data by request\n");
pei_data->saved_data = NULL;
pei_data->saved_data_size = 0;
}
/* We don't care about leaking the mapping */
entry = cbfs_ro_map("mrc.bin", NULL);
if (entry == NULL)
die("mrc.bin not found!");
printk(BIOS_DEBUG, "Starting Memory Reference Code\n");
ret = entry(pei_data);
if (ret < 0)
die("pei_data version mismatch\n");
/* Print the MRC version after executing the UEFI PEI stage. */
u32 version = mchbar_read32(MRC_REVISION);
printk(BIOS_DEBUG, "MRC Version %u.%u.%u Build %u\n",
(version >> 24) & 0xff, (version >> 16) & 0xff,
(version >> 8) & 0xff, (version >> 0) & 0xff);
report_memory_config();
}
static void setup_sdram_meminfo(struct pei_data *pei_data)
{
struct memory_info *mem_info;
printk(BIOS_DEBUG, "create cbmem for dimm information\n");
mem_info = cbmem_add(CBMEM_ID_MEMINFO, sizeof(struct memory_info));
if (!mem_info) {
printk(BIOS_ERR, "Error! Failed to add mem_info to cbmem\n");
return;
}
memset(mem_info, 0, sizeof(*mem_info));
/* Translate pei_memory_info struct data into memory_info struct */
mem_info->dimm_cnt = pei_data->meminfo.dimm_cnt;
for (int i = 0; i < MIN(DIMM_INFO_TOTAL, PEI_DIMM_INFO_TOTAL); i++) {
struct dimm_info *dimm = &mem_info->dimm[i];
const struct pei_dimm_info *pei_dimm =
&pei_data->meminfo.dimm[i];
dimm->dimm_size = pei_dimm->dimm_size;
dimm->ddr_type = pei_dimm->ddr_type;
dimm->ddr_frequency = pei_dimm->ddr_frequency;
dimm->rank_per_dimm = pei_dimm->rank_per_dimm;
dimm->channel_num = pei_dimm->channel_num;
dimm->dimm_num = pei_dimm->dimm_num;
dimm->bank_locator = pei_dimm->bank_locator;
memcpy(&dimm->serial, &pei_dimm->serial,
MIN(sizeof(dimm->serial), sizeof(pei_dimm->serial)));
memcpy(&dimm->module_part_number,
&pei_dimm->module_part_number,
MIN(sizeof(dimm->module_part_number),
sizeof(pei_dimm->module_part_number)));
dimm->module_part_number[DIMM_INFO_PART_NUMBER_SIZE - 1] = '\0';
dimm->mod_id = pei_dimm->mod_id;
dimm->mod_type = pei_dimm->mod_type;
dimm->bus_width = pei_dimm->bus_width;
}
}
/*
* 0 = leave channel enabled
* 1 = disable dimm 0 on channel
* 2 = disable dimm 1 on channel
* 3 = disable dimm 0+1 on channel
*/
static int make_channel_disabled_mask(const struct spd_info *spdi, int ch)
{
return (!spdi->addresses[ch + ch] << 0) | (!spdi->addresses[ch + ch + 1] << 1);
}
void perform_raminit(const struct chipset_power_state *const power_state)
{
const int s3resume = power_state->prev_sleep_state == ACPI_S3;
struct pei_data pei_data = { 0 };
mainboard_fill_pei_data(&pei_data);
if (CONFIG(BROADWELL_LPDDR3)) {
const struct lpddr3_dq_dqs_map *lpddr3_map = mb_get_lpddr3_dq_dqs_map();
assert(lpddr3_map);
memcpy(pei_data.dq_map, lpddr3_map->dq, sizeof(pei_data.dq_map));
memcpy(pei_data.dqs_map, lpddr3_map->dqs, sizeof(pei_data.dqs_map));
}
/* Obtain the SPD addresses from mainboard code */
struct spd_info spdi = { 0 };
mb_get_spd_map(&spdi);
if (CONFIG(HAVE_SPD_IN_CBFS))
copy_spd(&pei_data, &spdi);
/* Calculate unimplemented DIMM slots for each channel */
pei_data.dimm_channel0_disabled = make_channel_disabled_mask(&spdi, 0);
pei_data.dimm_channel1_disabled = make_channel_disabled_mask(&spdi, 1);
/* MRC expects left-aligned SMBus addresses, and 0 for memory-down */
for (size_t i = 0; i < ARRAY_SIZE(spdi.addresses); i++) {
const uint8_t addr = spdi.addresses[i];
pei_data.spd_addresses[i] = addr == SPD_MEMORY_DOWN ? 0 : addr << 1;
}
post_code(0x32);
timestamp_add_now(TS_INITRAM_START);
pei_data.boot_mode = power_state->prev_sleep_state;
/* Initialize RAM */
sdram_initialize(&pei_data);
timestamp_add_now(TS_INITRAM_END);
int cbmem_was_initted = !cbmem_recovery(s3resume);
if (s3resume && !cbmem_was_initted) {
/* Failed S3 resume, reset to come up cleanly */
printk(BIOS_CRIT, "Failed to recover CBMEM in S3 resume.\n");
system_reset();
}
save_mrc_data(&pei_data);
setup_sdram_meminfo(&pei_data);
}
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