include/handoff.h

   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 #ifdef CONFIG_NR_DRAM_BANKS
  24         struct {
  25                 u64 start;
  26                 u64 size;
  27         } ram_bank[CONFIG_NR_DRAM_BANKS];
  28 #endif
  29 };
  30
  31 void handoff_save_dram(struct spl_handoff *ho);
  32 void handoff_load_dram_size(struct spl_handoff *ho);
  33 void handoff_load_dram_banks(struct spl_handoff *ho);
  34
  35 /**
  36  * handoff_arch_save() - Save arch-specific info into the handoff area
  37  *
  38  * This is defined to an empty function by default, but arch-specific code can
  39  * define it to write to spi_handoff->arch. It is called from
  40  * write_spl_handoff().
  41  *
  42  * @ho: Handoff area to fill in
  43  * @return 0 if OK, -ve on error
  44  */
  45 int handoff_arch_save(struct spl_handoff *ho);
  46
  47 #endif
  48
  49 #endif