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f938ff468b
This CL gets ID_AA64MMFR1_EL1, Memory Model Feature Register 1, and grabs HPDS, LOR, PAN features from its bits. Fixes golang/go#75472.
48 lines
1.1 KiB
ArmAsm
48 lines
1.1 KiB
ArmAsm
// Copyright 2019 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build gc
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#include "textflag.h"
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// func getisar0() uint64
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TEXT ·getisar0(SB),NOSPLIT,$0-8
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// get Instruction Set Attributes 0 into x0
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// mrs x0, ID_AA64ISAR0_EL1 = d5380600
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WORD $0xd5380600
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MOVD R0, ret+0(FP)
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RET
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// func getisar1() uint64
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TEXT ·getisar1(SB),NOSPLIT,$0-8
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// get Instruction Set Attributes 1 into x0
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// mrs x0, ID_AA64ISAR1_EL1 = d5380620
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WORD $0xd5380620
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MOVD R0, ret+0(FP)
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RET
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// func getmmfr1() uint64
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TEXT ·getmmfr1(SB),NOSPLIT,$0-8
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// get Memory Model Feature Register 1 into x0
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// mrs x0, ID_AA64MMFR1_EL1 = d5380720
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WORD $0xd5380720
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MOVD R0, ret+0(FP)
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RET
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// func getpfr0() uint64
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TEXT ·getpfr0(SB),NOSPLIT,$0-8
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// get Processor Feature Register 0 into x0
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// mrs x0, ID_AA64PFR0_EL1 = d5380400
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WORD $0xd5380400
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MOVD R0, ret+0(FP)
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RET
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// func getzfr0() uint64
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TEXT ·getzfr0(SB),NOSPLIT,$0-8
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// get SVE Feature Register 0 into x0
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// mrs x0, ID_AA64ZFR0_EL1 = d5380480
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WORD $0xd5380480
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MOVD R0, ret+0(FP)
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RET
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