36 lines
981 B
ArmAsm
36 lines
981 B
ArmAsm
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2016 Google Inc
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* Copyright (C) 2018 Jonathan Neuschäfer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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// "return" to a payload. a0: FDT, a1: entry point
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.global riscvpayload
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riscvpayload:
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/* Load the entry point */
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mv t0, a1
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csrw mepc, t0
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csrr t0, mstatus
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/* Set mstatus.MPP (the previous privilege mode) to supervisor mode */
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li t1, ~(3<<11)
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and t0, t0, t1
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li t2, (1<<11)
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or t0, t0, t2
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csrw mstatus, t0
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/* Pass the right arguments and jump! */
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mv a1, a0
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csrr a0, mhartid
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mret
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