u-boot-brain/arch/x86/include/asm/arch-queensbay/fsp/fsp_support.h

/*
 * Copyright (C) 2013, Intel Corporation
 * Copyright (C) 2014, Bin Meng <bmeng.cn@gmail.com>
 *
 * SPDX-License-Identifier:	Intel
 */

#ifndef __FSP_SUPPORT_H__
#define __FSP_SUPPORT_H__

#include "fsp_types.h"
#include "fsp_fv.h"
#include "fsp_ffs.h"
#include "fsp_api.h"
#include "fsp_hob.h"
#include "fsp_platform.h"
#include "fsp_infoheader.h"
#include "fsp_bootmode.h"
#include "fsp_vpd.h"

struct shared_data_t {
	struct fsp_header_t	*fsp_hdr;
	u32			*stack_top;
	struct upd_region_t	fsp_upd;
};

void asm_continuation(void);

void fsp_init_done(void *hob_list);

/**
 * FSP Continuation function
 *
 * @shared_data: Shared data base before stack migration
 * @status:      Always 0
 * @hob_list:    HOB list pointer
 *
 * @retval:      Never returns
 */
void fsp_continue(struct shared_data_t *shared_data, u32 status,
		  void *hob_list);

/**
 * Find FSP header offset in FSP image
 *
 * If this function is called before the a stack is established, special care
 * must be taken. First, it cannot declare any local variable using stack.
 * Only register variable can be used here. Secondly, some compiler version
 * will add prolog or epilog code for the C function. If so the function call
 * may not work before stack is ready. GCC 4.8.1 has been verified to be
 * working for the following code.
 *
 * @retval: the offset of FSP header. If signature is invalid, returns 0.
 */
u32 find_fsp_header(void);

/**
 * FSP initialization wrapper function.
 *
 * @stack_top: bootloader stack top address
 * @boot_mode: boot mode defined in fsp_bootmode.h
 * @nvs_buf:   Non-volatile memory buffer pointer
 */
void fsp_init(u32 stack_top, u32 boot_mode, void *nvs_buf);

/**
 * FSP notification wrapper function
 *
 * @fsp_hdr: Pointer to FSP information header
 * @phase:   FSP initialization phase defined in enum fsp_phase_t
 *
 * @retval:  compatible status code with EFI_STATUS defined in PI spec
 */
u32 fsp_notify(struct fsp_header_t *fsp_hdr, u32 phase);

/**
 * This function retrieves the top of usable low memory.
 *
 * @hob_list: A HOB list pointer.
 *
 * @retval:   Usable low memory top.
 */
u32 get_usable_lowmem_top(const void *hob_list);

/**
 * This function retrieves the top of usable high memory.
 *
 * @hob_list: A HOB list pointer.
 *
 * @retval:   Usable high memory top.
 */
u64 get_usable_highmem_top(const void *hob_list);

/**
 * This function retrieves a special reserved memory region.
 *
 * @hob_list: A HOB list pointer.
 * @len:      A pointer to the GUID HOB data buffer length.
 *            If the GUID HOB is located, the length will be updated.
 * @guid:     A pointer to the owner guild.
 *
 * @retval:   Reserved region start address.
 *            0 if this region does not exist.
 */
u64 get_fsp_reserved_mem_from_guid(const void *hob_list,
				   u64 *len, struct efi_guid_t *guid);

/**
 * This function retrieves the FSP reserved normal memory.
 *
 * @hob_list: A HOB list pointer.
 * @len:      A pointer to the FSP reserved memory length buffer.
 *            If the GUID HOB is located, the length will be updated.
 * @retval:   FSP reserved memory base
 *            0 if this region does not exist.
 */
u32 get_fsp_reserved_mem(const void *hob_list, u32 *len);

/**
 * This function retrieves the TSEG reserved normal memory.
 *
 * @hob_list:      A HOB list pointer.
 * @len:           A pointer to the TSEG reserved memory length buffer.
 *                 If the GUID HOB is located, the length will be updated.
 *
 * @retval NULL:   Failed to find the TSEG reserved memory.
 * @retval others: TSEG reserved memory base.
 */
u32 get_tseg_reserved_mem(const void *hob_list, u32 *len);

/**
 * Returns the next instance of a HOB type from the starting HOB.
 *
 * @type:     HOB type to search
 * @hob_list: A pointer to the HOB list
 *
 * @retval:   A HOB object with matching type; Otherwise NULL.
 */
void *get_next_hob(u16 type, const void *hob_list);

/**
 * Returns the next instance of the matched GUID HOB from the starting HOB.
 *
 * @guid:     GUID to search
 * @hob_list: A pointer to the HOB list
 *
 * @retval:   A HOB object with matching GUID; Otherwise NULL.
 */
void *get_next_guid_hob(const struct efi_guid_t *guid, const void *hob_list);

/**
 * This function retrieves a GUID HOB data buffer and size.
 *
 * @hob_list:      A HOB list pointer.
 * @len:           A pointer to the GUID HOB data buffer length.
 *                 If the GUID HOB is located, the length will be updated.
 * @guid           A pointer to HOB GUID.
 *
 * @retval NULL:   Failed to find the GUID HOB.
 * @retval others: GUID HOB data buffer pointer.
 */
void *get_guid_hob_data(const void *hob_list, u32 *len,
			struct efi_guid_t *guid);

/**
 * This function retrieves FSP Non-volatile Storage HOB buffer and size.
 *
 * @hob_list:      A HOB list pointer.
 * @len:           A pointer to the NVS data buffer length.
 *                 If the HOB is located, the length will be updated.
 *
 * @retval NULL:   Failed to find the NVS HOB.
 * @retval others: FSP NVS data buffer pointer.
 */
void *get_fsp_nvs_data(const void *hob_list, u32 *len);

/**
 * This function retrieves Bootloader temporary stack buffer and size.
 *
 * @hob_list:      A HOB list pointer.
 * @len:           A pointer to the bootloader temporary stack length.
 *                 If the HOB is located, the length will be updated.
 *
 * @retval NULL:   Failed to find the bootloader temporary stack HOB.
 * @retval others: Bootloader temporary stackbuffer pointer.
 */
void *get_bootloader_tmp_mem(const void *hob_list, u32 *len);

/**
 * This function overrides the default configurations in the UPD data region.
 *
 * @fsp_upd: A pointer to the upd_region_t data strcture
 *
 * @return:  None
 */
void update_fsp_upd(struct upd_region_t *fsp_upd);

#endif