forked from Mirrors/opensbi
bc4d6108f4
This patch extends fw_payload blob to provide FW_PAYLOAD_FDT_PATH option using which we can embed custom FDT in .text section of fw_payload blob. In other words, FW_PAYLOAD_FDT_PATH is an option to forcefully override FDT passed by previous booting stage in a1 register. Signed-off-by: Anup Patel <anup.patel@wdc.com>
49 lines
847 B
ArmAsm
49 lines
847 B
ArmAsm
/*
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* Copyright (c) 2018 Western Digital Corporation or its affiliates.
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*
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* Authors:
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* Anup Patel <anup.patel@wdc.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "fw_common.S"
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.align 3
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.section .entry, "ax", %progbits
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.global fw_prev_arg1
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fw_prev_arg1:
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/* We return previous arg1 in 'a0' */
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add a0, zero, zero
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ret
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.align 3
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.section .entry, "ax", %progbits
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.global fw_next_arg1
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fw_next_arg1:
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/* We return next arg1 in 'a0' */
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#ifdef FW_JUMP_FDT_ADDR
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li a0, FW_JUMP_FDT_ADDR
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#else
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add a0, zero, zero
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#endif
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ret
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.align 3
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.section .entry, "ax", %progbits
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.global fw_next_addr
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fw_next_addr:
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/* We return next address in 'a0' */
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la a0, _jump_addr
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REG_L a0, (a0)
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ret
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#ifndef FW_JUMP_ADDR
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#error "Must define FW_JUMP_ADDR"
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#endif
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.align 3
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.section .entry, "ax", %progbits
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_jump_addr:
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RISCV_PTR FW_JUMP_ADDR
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