warkanum
96281c9f03
* Add lint/format checks to the Gitea release workflow and Makefile (targets: vet, fmt, fmt-check, staticcheck, govulncheck, check) * Switch .golangci.json formatter from gofmt to gofumpt (extra.group-params) * Bump golang.org/x/text 0.37.0 -> 0.39.0 for GO-2026-5970; re-vendor * Fix staticcheck S1011 in pkg/diff; drop unused pgsql writer helpers * Fix gocritic unnamedResult (pkg/diff) and rangeValCopy (pkg/pgsql) * Apply gofumpt + goimports formatting across the tree
63 lines
1.9 KiB
Go
63 lines
1.9 KiB
Go
// Copyright 2022 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 loong64
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package cpu
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const cacheLineSize = 64
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// Bit fields for CPUCFG registers, Related reference documents:
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// https://loongson.github.io/LoongArch-Documentation/LoongArch-Vol1-EN.html#_cpucfg
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const (
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// CPUCFG1 bits
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cpucfg1_CRC32 = 1 << 25
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// CPUCFG2 bits
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cpucfg2_LAM_BH = 1 << 27
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cpucfg2_LAMCAS = 1 << 28
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cpucfg2_LLACQ_SCREL = 1 << 29
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cpucfg2_SCQ = 1 << 30
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// CPUCFG3 bits
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cpucfg3_DBAR_HINTS = 1 << 17
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)
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func initOptions() {
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options = []option{
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{Name: "lsx", Feature: &Loong64.HasLSX},
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{Name: "lasx", Feature: &Loong64.HasLASX},
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{Name: "crc32", Feature: &Loong64.HasCRC32},
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{Name: "lam_bh", Feature: &Loong64.HasLAM_BH},
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{Name: "lamcas", Feature: &Loong64.HasLAMCAS},
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{Name: "llacq_screl", Feature: &Loong64.HasLLACQ_SCREL},
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{Name: "scq", Feature: &Loong64.HasSCQ},
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{Name: "dbar_hints", Feature: &Loong64.HasDBAR_HINTS},
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}
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// The CPUCFG data on Loong64 only reflects the hardware capabilities,
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// not the kernel support status, so features such as LSX and LASX that
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// require kernel support cannot be obtained from the CPUCFG data.
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//
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// These features only require hardware capability support and do not
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// require kernel specific support, so they can be obtained directly
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// through CPUCFG
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cfg1 := get_cpucfg(1)
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cfg2 := get_cpucfg(2)
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cfg3 := get_cpucfg(3)
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Loong64.HasCRC32 = cfgIsSet(cfg1, cpucfg1_CRC32)
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Loong64.HasLAMCAS = cfgIsSet(cfg2, cpucfg2_LAMCAS)
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Loong64.HasLAM_BH = cfgIsSet(cfg2, cpucfg2_LAM_BH)
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Loong64.HasLLACQ_SCREL = cfgIsSet(cfg2, cpucfg2_LLACQ_SCREL)
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Loong64.HasSCQ = cfgIsSet(cfg2, cpucfg2_SCQ)
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Loong64.HasDBAR_HINTS = cfgIsSet(cfg3, cpucfg3_DBAR_HINTS)
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}
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func get_cpucfg(reg uint32) uint32
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func cfgIsSet(cfg uint32, val uint32) bool {
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return cfg&val != 0
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}
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