e60873c8f3
Plumb in the ability for U-Boot proper to accept an incoming standard passage from a previous phase, such as SPL or TF-A. This allows data to be passed from binary to binary when firmware is booting. Series-changes: 2 - Rebase to master - Rework global_data for new stdpass convention Series-changes: 3 - Move passage.h into this patch - Add passage_valid() to decide if stdpass was provided - Move arch_passage_entry() into this patch - Make the global_data fields present only when needed Signed-off-by: Simon Glass <sjg@chromium.org>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Standard passage implementation
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*
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* Copyright 2022 Google LLC
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* Written by Simon Glass <sjg@chromium.org>
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*/
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#ifndef __PASSAGE_H
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#define __PASSAGE_H
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#include <stdbool.h>
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#include <asm/global_data.h>
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DECLARE_GLOBAL_DATA_PTR;
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enum {
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PASSAGE_ABI_MACH = 0x4a0fb10bul,
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PASSAGE_ABI_VERSION = 1ul,
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};
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static inline ulong passage_mach_version(void)
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{
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#if BITS_PER_LONG == 64
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return PASSAGE_ABI_MACH | (ulong)PASSAGE_ABI_VERSION << 32;
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#else
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return (PASSAGE_ABI_MACH & 0xffffff) | (PASSAGE_ABI_VERSION << 24);
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#endif
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}
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/**
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* passage_valid() - See if standard passage was provided by the previous phase
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*
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* Return: true if standard passage was provided, else false
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*/
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static inline bool passage_valid(void)
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{
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#if CONFIG_IS_ENABLED(BLOBLIST_PASSAGE)
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return gd->passage_mach == passage_mach_version();
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#else
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return false;
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#endif
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}
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/* arch_passage_entry() - Jump to the next phase, using standard passage
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*
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* @entry_addr: Address to jump to
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* @bloblist: Bloblist address to pass
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* @fdt: FDT to pass
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*/
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void __noreturn arch_passage_entry(ulong entry_addr, ulong bloblist, ulong fdt);
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#endif
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