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

#include <assert.h>
#include <soc/soc_util.h>
#include <stdlib.h>
#include <string.h>

uint8_t get_iiostack_info(struct iiostack_resource *info)
{
	size_t hob_size;
	const uint8_t fsp_hob_iio_universal_data_guid[16] = FSP_HOB_IIO_UNIVERSAL_DATA_GUID;
	const IIO_UDS *hob;

	hob = fsp_find_extension_hob_by_guid(
		fsp_hob_iio_universal_data_guid, &hob_size);
	assert(hob != NULL && hob_size != 0);

	// copy IIO Stack info from FSP HOB
	info->no_of_stacks = 0;
	for (int s = 0; s < hob->PlatformData.numofIIO; ++s) {
		for (int x = 0; x < MAX_IIO_STACK; ++x) {
			const STACK_RES *ri = &hob->PlatformData.IIO_resource[s].StackRes[x];
			// TODO: do we have situation with only bux 0 and one stack?
			if (ri->BusBase >= ri->BusLimit)
				continue;
			assert(info->no_of_stacks < (CONFIG_MAX_SOCKET * MAX_IIO_STACK));
			memcpy(&info->res[info->no_of_stacks++], ri, sizeof(STACK_RES));
		}
	}

	return hob->PlatformData.Pci64BitResourceAllocation;
}