1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Passing basic information from SPL to U-Boot proper
4 *
5 * Copyright 2018 Google, Inc
6 */
7
8#ifndef __HANDOFF_H
9#define __HANDOFF_H
10
11#if CONFIG_IS_ENABLED(HANDOFF)
12
13#include <asm/handoff.h>
14
15/**
16 * struct spl_handoff - information passed from SPL to U-Boot proper
17 *
18 * @ram_size: Value to use for gd->ram_size
19 */
20struct spl_handoff {
21	struct arch_spl_handoff arch;
22	u64 ram_size;
23	struct {
24		u64 start;
25		u64 size;
26	} ram_bank[CONFIG_NR_DRAM_BANKS];
27};
28
29void handoff_save_dram(struct spl_handoff *ho);
30void handoff_load_dram_size(struct spl_handoff *ho);
31void handoff_load_dram_banks(struct spl_handoff *ho);
32
33/**
34 * handoff_arch_save() - Save arch-specific info into the handoff area
35 *
36 * This is defined to an empty function by default, but arch-specific code can
37 * define it to write to spi_handoff->arch. It is called from
38 * write_spl_handoff().
39 *
40 * @ho: Handoff area to fill in
41 * Return: 0 if OK, -ve on error
42 */
43int handoff_arch_save(struct spl_handoff *ho);
44
45#endif
46
47#endif
48