/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <device/mmio.h>
#include <cbmem.h>
#include <commonlib/helpers.h>
#include <console/console.h>
#include <fsp/api.h>
#include <fsp/util.h>
#include <stdint.h>
#include <string.h>

#define HOB_HEADER_LEN		8

/* GUIDs in little-endian, so they can be used with memcmp() */
const uint8_t fsp_bootloader_tolum_guid[16] = {
	0x56, 0x4f, 0xff, 0x73, 0x8e, 0xaa, 0x51, 0x44,
	0xb3, 0x16, 0x36, 0x35, 0x36, 0x67, 0xad, 0x44,
};

const uint8_t fsp_reserved_memory_guid[16] = {
	0x59, 0x97, 0xa7, 0x69, 0x73, 0x13, 0x67, 0x43,
	0xa6, 0xc4, 0xc7, 0xf5, 0x9e, 0xfd, 0x98, 0x6e,
};

const uint8_t fsp_nv_storage_guid_2[16] = {
	0x8f, 0x78, 0x66, 0x48, 0xa8, 0x6b, 0xd8, 0x47,
	0x83, 0x6, 0xac, 0xf7, 0x7f, 0x55, 0x10, 0x46
};

const uint8_t fsp_nv_storage_guid[16] = {
	0x02, 0xcf, 0x1a, 0x72, 0x77, 0x4d, 0x2a, 0x4c,
	0xb3, 0xdc, 0x27, 0x0b, 0x7b, 0xa9, 0xe4, 0xb0
};

static const uint8_t uuid_fv_info[16] = {
	0x2e, 0x72, 0x8e, 0x79, 0xb2, 0x15, 0x13, 0x4e,
	0x8a, 0xe9, 0x6b, 0xa3, 0x0f, 0xf7, 0xf1, 0x67
};

/*
 * Utilities for walking HOBs
 */

bool fsp_guid_compare(const uint8_t guid1[16], const uint8_t guid2[16])
{
	return !memcmp(guid1, guid2, 16);
}

const struct hob_header *fsp_next_hob(const struct hob_header *parent)
{
	union {
		const struct hob_header *hob;
		uintptr_t addr;
	} hob_walker;

	hob_walker.hob = parent;
	hob_walker.addr += parent->length;
	return hob_walker.hob;
}

static const void *hob_header_to_struct(const struct hob_header *hob)
{
	union {
		const struct hob_header *hob_hdr;
		const void *hob_descr;
		uintptr_t addr;
	} hob_walker;

	hob_walker.hob_hdr = hob;
	hob_walker.addr += HOB_HEADER_LEN;
	return hob_walker.hob_descr;
}

static const void *hob_header_to_extension_hob(const struct hob_header *hob)
{
	union {
		const struct hob_header *hob_hdr;
		const void *hob_descr;
		uintptr_t addr;
	} hob_walker;

	hob_walker.hob_hdr = hob;
	hob_walker.addr += HOB_HEADER_LEN + 16; /* header and 16-byte GUID */
	return hob_walker.hob_descr;
}

const
struct hob_resource *fsp_hob_header_to_resource(const struct hob_header *hob)
{
	return hob_header_to_struct(hob);
}

/*
 * Utilities for locating and identifying HOBs
 */

static void *fsp_hob_list_ptr;

static void save_hob_list(int is_recovery)
{
	uint32_t *cbmem_loc;
	const void *hob_list;
	cbmem_loc = cbmem_add(CBMEM_ID_FSP_RUNTIME, sizeof(*cbmem_loc));
	if (cbmem_loc == NULL)
		die("Error: Could not add cbmem area for hob list.\n");
	hob_list = fsp_get_hob_list();
	if (!hob_list)
		die("Error: Could not locate hob list pointer.\n");
	*cbmem_loc = (uintptr_t)hob_list;
}

CBMEM_CREATION_HOOK(save_hob_list);

const void *fsp_get_hob_list(void)
{
	uint32_t *list_loc;

	if (ENV_RAMINIT)
		return fsp_hob_list_ptr;
	list_loc = cbmem_find(CBMEM_ID_FSP_RUNTIME);
	return (list_loc) ? (void *)(uintptr_t)(*list_loc) : NULL;
}

void *fsp_get_hob_list_ptr(void)
{
	return &fsp_hob_list_ptr;
}

enum cb_err fsp_hob_iterator_init(const struct hob_header **hob_iterator)
{
	*hob_iterator = fsp_get_hob_list();
	return *hob_iterator ? CB_SUCCESS : CB_ERR;
}

static enum cb_err fsp_hob_iterator_get_next(const struct hob_header **hob_iterator,
					     uint16_t hob_type,
					     const struct hob_header **hob)
{
	const struct hob_header *current_hob;
	while ((*hob_iterator)->type != HOB_TYPE_END_OF_HOB_LIST) {
		current_hob = *hob_iterator;
		*hob_iterator = fsp_next_hob(*hob_iterator);
		if (current_hob->type == hob_type) {
			*hob = current_hob;
			return CB_SUCCESS;
		}
	}
	return CB_ERR;
}

enum cb_err fsp_hob_iterator_get_next_resource(const struct hob_header **hob_iterator,
					       const struct hob_resource **res)
{
	const struct hob_header *hob;
	while (fsp_hob_iterator_get_next(hob_iterator, HOB_TYPE_RESOURCE_DESCRIPTOR, &hob) == CB_SUCCESS) {
		*res = fsp_hob_header_to_resource(hob);
		return CB_SUCCESS;
	}
	return CB_ERR;
}

enum cb_err fsp_hob_iterator_get_next_guid_resource(const struct hob_header **hob_iterator,
						    const uint8_t guid[16],
						    const struct hob_resource **res)
{
	const struct hob_resource *res_hob;
	while (fsp_hob_iterator_get_next_resource(hob_iterator, &res_hob) == CB_SUCCESS) {
		if (fsp_guid_compare(res_hob->owner_guid, guid)) {
			*res = res_hob;
			return CB_SUCCESS;
		}
	}
	return CB_ERR;
}

enum cb_err fsp_hob_iterator_get_next_guid_extension(const struct hob_header **hob_iterator,
						     const uint8_t guid[16],
						     const void **data, size_t *size)
{
	const struct hob_header *hob;
	const uint8_t *guid_hob;
	while (fsp_hob_iterator_get_next(hob_iterator, HOB_TYPE_GUID_EXTENSION, &hob) == CB_SUCCESS) {
		guid_hob = hob_header_to_struct(hob);
		if (fsp_guid_compare(guid_hob, guid)) {
			*size = hob->length - (HOB_HEADER_LEN + 16);
			*data = hob_header_to_extension_hob(hob);
			return CB_SUCCESS;
		}
	}
	return CB_ERR;
}

void fsp_print_guid(int level, const void *base)
{
	uint32_t big;
	uint16_t mid[2];

	const uint8_t *id = base;
	big = read32(id + 0);
	mid[0] = read16(id + 4);
	mid[1] = read16(id + 6);

	printk(level, "%08x-%04x-%04x-%02x%02x%02x%02x%02x%02x%02x%02x",
	       big, mid[0], mid[1],
	       id[8], id[9], id[10], id[11], id[12], id[13], id[14], id[15]);
}

int fsp_find_range_hob(struct range_entry *re, const uint8_t guid[16])
{
	const struct hob_header *hob_iterator;
	const struct hob_resource *fsp_mem;

	if (fsp_hob_iterator_init(&hob_iterator) != CB_SUCCESS)
		return -1;

	range_entry_init(re, 0, 0, 0);

	if (fsp_hob_iterator_get_next_guid_resource(&hob_iterator, guid, &fsp_mem) != CB_SUCCESS) {
		fsp_print_guid(BIOS_SPEW, guid);
		printk(BIOS_SPEW, " not found!\n");
		return -1;
	}

	range_entry_init(re, fsp_mem->addr, fsp_mem->addr + fsp_mem->length, 0);
	return 0;
}

void fsp_find_reserved_memory(struct range_entry *re)
{
	if (fsp_find_range_hob(re, fsp_reserved_memory_guid))
		die("9.1: FSP_RESERVED_MEMORY_RESOURCE_HOB missing!\n");
}

const void *fsp_find_extension_hob_by_guid(const uint8_t *guid, size_t *size)
{
	const struct hob_header *hob_iterator;
	const void *hob_guid;

	if (fsp_hob_iterator_init(&hob_iterator) != CB_SUCCESS)
		return NULL;

	if (fsp_hob_iterator_get_next_guid_extension(&hob_iterator, guid, &hob_guid, size) == CB_SUCCESS)
		return hob_guid;

	return NULL;
}

static void display_fsp_version_info_hob(const void *hob)
{
#if CONFIG(DISPLAY_FSP_VERSION_INFO) || CONFIG(DISPLAY_FSP_VERSION_INFO_2)

	int index, cnt, tcount;
	char *str_ptr;
	uint8_t vs;
#if CONFIG(DISPLAY_FSP_VERSION_INFO)
	const FIRMWARE_VERSION_INFO *fvi;
	const FIRMWARE_VERSION_INFO_HOB *fvih = (FIRMWARE_VERSION_INFO_HOB *)hob;

	fvi = (void *)&fvih[1];
	str_ptr = (char *)((uintptr_t)fvi + (fvih->Count * sizeof(FIRMWARE_VERSION_INFO)));
	tcount = fvih->Count;
#elif CONFIG(DISPLAY_FSP_VERSION_INFO_2)

	uint8_t *hobstart = (uint8_t *) hob;
	hobstart += sizeof(EFI_HOB_GUID_TYPE);

	const SMBIOS_TABLE_TYPE_OEM_INTEL_FVI *stfvi =
			(SMBIOS_TABLE_TYPE_OEM_INTEL_FVI *)hobstart;
	const INTEL_FIRMWARE_VERSION_INFO *fvi;

	str_ptr = ((char *) &(stfvi->Fvi[0])) +
			(stfvi->Count * sizeof(INTEL_FIRMWARE_VERSION_INFO));
	tcount = stfvi->Count;
	fvi = &stfvi->Fvi[0];
#endif

	for (index = 0; index < tcount; index++) {
		cnt = strlen(str_ptr);

#if CONFIG(DISPLAY_FSP_VERSION_INFO)
			vs = fvi[index].VersionStringIndex;
#elif CONFIG(DISPLAY_FSP_VERSION_INFO_2)
			vs = fvi[index].VersionString;
#endif
		/*  Don't show ingredient name and version if its all 0xFF */
		if (fvi[index].Version.MajorVersion == 0xFF &&
			fvi[index].Version.MinorVersion == 0xFF &&
			fvi[index].Version.Revision == 0xFF &&
			fvi[index].Version.BuildNumber == 0xFF &&
			vs == 0) {
			str_ptr = (char *)((uintptr_t)str_ptr + cnt + sizeof(uint8_t));
			continue;
		}
		/*
		 * Firmware Version String consist of 2 pieces of information
		 * 1. Component Name: string type data holds FW type name.
		 * 2. Version Information : Either a string type data or
		 * numeric field holds FW version information.
		 */
		printk(BIOS_DEBUG, "%s = ", str_ptr);

		if (!vs)
			printk(BIOS_DEBUG, "%x.%x.%x.%x\n",
					fvi[index].Version.MajorVersion,
					fvi[index].Version.MinorVersion,
					fvi[index].Version.Revision,
					fvi[index].Version.BuildNumber);
		else {
			str_ptr = (char *)((uintptr_t)str_ptr + cnt + sizeof(uint8_t));
			cnt = strlen(str_ptr);
			printk(BIOS_DEBUG, "%s\n", str_ptr);
		}
		str_ptr = (char *)((uintptr_t)str_ptr + cnt + sizeof(uint8_t));
	}
#endif
}

void fsp_display_fvi_version_hob(void)
{
	const uint8_t *hob_uuid;
	const struct hob_header *hob = fsp_get_hob_list();

	if (!hob)
		return;

	printk(BIOS_DEBUG, "Display FSP Version Info HOB\n");
	for (; hob->type != HOB_TYPE_END_OF_HOB_LIST; hob = fsp_next_hob(hob)) {
		if (hob->type != HOB_TYPE_GUID_EXTENSION)
			continue;

		hob_uuid = hob_header_to_struct(hob);

		if (fsp_guid_compare(hob_uuid, uuid_fv_info)) {
			display_fsp_version_info_hob(hob);
		}
	}
}

const void *fsp_find_nv_storage_data(size_t *size)
{
	if (CONFIG(PLATFORM_USES_FSP2_3)) {
		const struct fsp_nvs_hob2_data_region_header *hob;

		hob = (const struct fsp_nvs_hob2_data_region_header *)
		      fsp_find_extension_hob_by_guid(fsp_nv_storage_guid_2, size);
		if (hob != NULL) {
			*size = hob->nvs_data_length;
			return (void *)(uintptr_t)hob->nvs_data_ptr;
		}
	}
	return fsp_find_extension_hob_by_guid(fsp_nv_storage_guid, size);
}

void fsp_find_bootloader_tolum(struct range_entry *re)
{
	if (fsp_find_range_hob(re, fsp_bootloader_tolum_guid))
		die("9.3: FSP_BOOTLOADER_TOLUM_HOB missing!\n");
}