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  */
20 struct 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 
29 void handoff_save_dram(struct spl_handoff *ho);
30 void handoff_load_dram_size(struct spl_handoff *ho);
31 void 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  */
43 int handoff_arch_save(struct spl_handoff *ho);
44 
45 #endif
46 
47 #endif
48