/* SPDX-License-Identifier: GPL-2.0-only */

#include <stddef.h>
#include <acpi/acpi.h>
#include <assert.h>
#include <console/console.h>
#include <cbmem.h>
#include <cf9_reset.h>
#include <cpu/intel/microcode.h>
#include <ec/google/chromeec/ec.h>
#include <ec/google/chromeec/ec_commands.h>
#include <elog.h>
#include <fsp/romstage.h>
#include <mrc_cache.h>
#include <program_loading.h>
#include <romstage_handoff.h>
#include <smbios.h>
#include <stage_cache.h>
#include <string.h>
#include <timestamp.h>

static void raminit_common(struct romstage_params *params)
{
	bool s3wake;
	size_t mrc_size;

	post_code(0x32);

	timestamp_add_now(TS_INITRAM_START);

	s3wake = params->power_state->prev_sleep_state == ACPI_S3;

	elog_boot_notify(s3wake);

	post_code(0x33);

	/* Check recovery and MRC cache */
	params->saved_data_size = 0;
	params->saved_data = NULL;
	if (!params->disable_saved_data) {
		/* Assume boot device is memory mapped. */
		assert(CONFIG(BOOT_DEVICE_MEMORY_MAPPED));

		params->saved_data = NULL;
		if (CONFIG(CACHE_MRC_SETTINGS))
			params->saved_data =
				mrc_cache_current_mmap_leak(MRC_TRAINING_DATA,
							    params->fsp_version,
							    &mrc_size);
		if (params->saved_data) {
			/* MRC cache found */
			params->saved_data_size = mrc_size;

		} else if (s3wake) {
			/* Waking from S3 and no cache. */
			printk(BIOS_DEBUG,
			       "No MRC cache "
			       "found in S3 resume path.\n");
			post_code(POSTCODE_RESUME_FAILURE);
			/* FIXME: A "system" reset is likely enough: */
			full_reset();
		} else {
			printk(BIOS_DEBUG, "No MRC cache found.\n");
		}
	}

	/* Initialize RAM */
	raminit(params);
	timestamp_add_now(TS_INITRAM_END);

	/* Save MRC output */
	if (CONFIG(CACHE_MRC_SETTINGS)) {
		printk(BIOS_DEBUG, "MRC data at %p %zu bytes\n",
			params->data_to_save, params->data_to_save_size);
		if (!s3wake
			&& (params->data_to_save_size != 0)
			&& (params->data_to_save != NULL))
			mrc_cache_stash_data(MRC_TRAINING_DATA,
				params->fsp_version,
				params->data_to_save,
				params->data_to_save_size);
	}

	/* Save DIMM information */
	if (!s3wake)
		mainboard_save_dimm_info(params);

	/* Create romstage handoff information */
	if (romstage_handoff_init(
			params->power_state->prev_sleep_state == ACPI_S3) < 0)
		/* FIXME: A "system" reset is likely enough: */
		full_reset();
}

void cache_as_ram_stage_main(FSP_INFO_HEADER *fih)
{
	struct romstage_params params = {
		.chipset_context = fih,
	};

	post_code(0x30);

	timestamp_add_now(TS_ROMSTAGE_START);

	/* Display parameters */
	if (!CONFIG(NO_ECAM_MMCONF_SUPPORT))
		printk(BIOS_SPEW, "CONFIG_ECAM_MMCONF_BASE_ADDRESS: 0x%08x\n",
			CONFIG_ECAM_MMCONF_BASE_ADDRESS);
	printk(BIOS_INFO, "Using FSP 1.1\n");

	/* Display FSP banner */
	print_fsp_info(fih);

	/* Stash FSP version. */
	params.fsp_version = fsp_version(fih);

	/* Get power state */
	params.power_state = fill_power_state();

	/* Board initialization before and after RAM is enabled */
	mainboard_pre_raminit(&params);

	post_code(0x31);

	/* Initialize memory */
	raminit_common(&params);

	soc_after_ram_init(&params);
	post_code(0x38);
}

/* Board initialization before and after RAM is enabled */
__weak void mainboard_pre_raminit(struct romstage_params *params)
{
}

/* Save the DIMM information for SMBIOS table 17 */
__weak void mainboard_save_dimm_info(
	struct romstage_params *params)
{
	int channel;
	CHANNEL_INFO *channel_info;
	int dimm;
	DIMM_INFO *dimm_info;
	int dimm_max;
	void *hob_list_ptr;
	EFI_HOB_GUID_TYPE *hob_ptr;
	int index;
	struct memory_info *mem_info;
	FSP_SMBIOS_MEMORY_INFO *memory_info_hob;
	const EFI_GUID memory_info_hob_guid = FSP_SMBIOS_MEMORY_INFO_GUID;

	/* Locate the memory info HOB, presence validated by raminit */
	hob_list_ptr = fsp_get_hob_list();
	hob_ptr = get_guid_hob(&memory_info_hob_guid, hob_list_ptr);
	memory_info_hob = (FSP_SMBIOS_MEMORY_INFO *)(hob_ptr + 1);

	/* Display the data in the FSP_SMBIOS_MEMORY_INFO HOB */
	if (CONFIG(DISPLAY_HOBS)) {
		printk(BIOS_DEBUG, "FSP_SMBIOS_MEMORY_INFO HOB\n");
		printk(BIOS_DEBUG, "    0x%02x: Revision\n",
			memory_info_hob->Revision);
		printk(BIOS_DEBUG, "    0x%02x: MemoryType\n",
			memory_info_hob->MemoryType);
		printk(BIOS_DEBUG, "    %d: MemoryFrequencyInMHz\n",
			memory_info_hob->MemoryFrequencyInMHz);
		printk(BIOS_DEBUG, "    %d: DataWidth in bits\n",
			memory_info_hob->DataWidth);
		printk(BIOS_DEBUG, "    0x%02x: ErrorCorrectionType\n",
			memory_info_hob->ErrorCorrectionType);
		printk(BIOS_DEBUG, "    0x%02x: ChannelCount\n",
			memory_info_hob->ChannelCount);
		for (channel = 0; channel < memory_info_hob->ChannelCount;
			channel++) {
			channel_info = &memory_info_hob->ChannelInfo[channel];
			printk(BIOS_DEBUG, "  Channel %d\n", channel);
			printk(BIOS_DEBUG, "      0x%02x: ChannelId\n",
				channel_info->ChannelId);
			printk(BIOS_DEBUG, "      0x%02x: DimmCount\n",
				channel_info->DimmCount);
			for (dimm = 0; dimm < channel_info->DimmCount;
				dimm++) {
				dimm_info = &channel_info->DimmInfo[dimm];
				printk(BIOS_DEBUG, "   DIMM %d\n", dimm);
				printk(BIOS_DEBUG, "      0x%02x: DimmId\n",
					dimm_info->DimmId);
				printk(BIOS_DEBUG, "      %d: SizeInMb\n",
					dimm_info->SizeInMb);
			}
		}
	}

	/*
	 * 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: %p\n", mem_info);
	if (mem_info == NULL)
		return;
	memset(mem_info, 0, sizeof(*mem_info));

	/* Describe the first N DIMMs in the system */
	index = 0;
	dimm_max = ARRAY_SIZE(mem_info->dimm);
	for (channel = 0; channel < memory_info_hob->ChannelCount; channel++) {
		if (index >= dimm_max)
			break;
		channel_info = &memory_info_hob->ChannelInfo[channel];
		for (dimm = 0; dimm < channel_info->DimmCount; dimm++) {
			if (index >= dimm_max)
				break;
			dimm_info = &channel_info->DimmInfo[dimm];

			/* Populate the DIMM information */
			if (dimm_info->SizeInMb) {
				mem_info->dimm[index].dimm_size =
					dimm_info->SizeInMb;
				mem_info->dimm[index].ddr_type =
					memory_info_hob->MemoryType;
				mem_info->dimm[index].ddr_frequency =
					memory_info_hob->MemoryFrequencyInMHz;
				mem_info->dimm[index].channel_num =
					channel_info->ChannelId;
				mem_info->dimm[index].dimm_num =
					dimm_info->DimmId;
				switch (memory_info_hob->DataWidth) {
				default:
				case 8:
					mem_info->dimm[index].bus_width =
						MEMORY_BUS_WIDTH_8;
					break;

				case 16:
					mem_info->dimm[index].bus_width =
						MEMORY_BUS_WIDTH_16;
					break;

				case 32:
					mem_info->dimm[index].bus_width =
						MEMORY_BUS_WIDTH_32;
					break;

				case 64:
					mem_info->dimm[index].bus_width =
						MEMORY_BUS_WIDTH_64;
					break;

				case 128:
					mem_info->dimm[index].bus_width =
						MEMORY_BUS_WIDTH_128;
					break;
				}
				index++;
			}
		}
	}
	mem_info->dimm_cnt = index;
	printk(BIOS_DEBUG, "%d DIMMs found\n", mem_info->dimm_cnt);
}