28 lines
608 B
ArmAsm
28 lines
608 B
ArmAsm
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// Copyright (c) 2026 Petr Balvín <opensource@petrbalvin.org> (https://petrbalvin.org)
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// SPDX-License-Identifier: BSD-3-Clause
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#include "textflag.h"
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// func readCSR(csr int64) int64
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// Reads a CSR into the return value.
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TEXT ·readCSR(SB), NOSPLIT, $0-16
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LD a+0(FP), A0
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CSRRS $0x300, X0, A1
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SD A1, ret+8(FP)
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RET
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// func setCSRBit(csr, bit int64) int64
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TEXT ·setCSRBit(SB), NOSPLIT, $0-24
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LD a+0(FP), A0
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LD b+8(FP), A1
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CSRRS $0x304, A1, A2
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SD A2, ret+16(FP)
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RET
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// func writeCSR(val int64) int64
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TEXT ·writeCSR(SB), NOSPLIT, $0-16
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LD a+0(FP), A0
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CSRRW $0x305, A0, A1
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SD A1, ret+8(FP)
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RET
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