Add ACPI/AML Generation

Signed-off-by: Christopher Meis <christopher.meis@9elements.com>

acpi/aml_test.go

@@ -0,0 +1,49 @@
+package acpi_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/bobuhiro11/gokvm/acpi"
+)
+
+func TestCalcPkgLength(t *testing.T) {
+	t.Parallel()
+
+	for _, tt := range []struct {
+		name string
+		size uint32
+		exp  []byte
+		err  error
+	}{
+		{
+			name: "1ByteSize",
+			size: 62,
+			exp:  []byte{63},
+		},
+		{
+			name: "2ByteSize",
+			size: 64,
+			exp:  []byte{1<<6 | (66 & 0xf), 66 >> 4},
+		},
+		{
+			name: "3ByteSize",
+			size: 4096,
+			exp:  []byte{2<<6 | (4099 & 0xf), 0, 1},
+		},
+		{
+			name: "4ByteSize",
+			size: 536870912,
+			exp:  []byte{3<<6 | (536870916 & 0xf), 0, 0, 0},
+		},
+	} {
+		tt := tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			val := acpi.CalcPkgLength(tt.size, true)
+			if !bytes.Equal(val, tt.exp) {
+				t.Fatalf("byte not match. Have: 0x%x, want: 0x%x", val, tt.exp)
+			}
+		})
+	}
+}

acpi/const.go

@@ -0,0 +1,84 @@
+package acpi
+
+type Signature string
+
+func (s Signature) ToBytes() [4]byte {
+	var ret [4]byte
+
+	for i := 0; i < 3; i++ {
+		ret[i] = s[i]
+	}
+
+	return ret
+}
+
+const (
+	SigAEST Signature = "AEST"
+	SigAPIC Signature = "APIC"
+	SigBDAT Signature = "BDAT"
+	SigBERT Signature = "BERT"
+	SigBGRT Signature = "BGRT"
+	SigBOOT Signature = "BOOT"
+	SigCDIT Signature = "CDIT"
+	SigCEDT Signature = "CEDT"
+	SigCPEP Signature = "CPEP"
+	SigCRAT Signature = "CRAT"
+	SigCSRT Signature = "CSRT"
+	SigDBGP Signature = "DBGP"
+	SigDBG2 Signature = "DBG2"
+	SigDMAR Signature = "DMAR"
+	SigDRTM Signature = "DRTM"
+	SigDSDT Signature = "DSDT"
+	SigECDT Signature = "ECDT"
+	SigETDT Signature = "ETDT"
+	SigEINJ Signature = "EINJ"
+	SigERST Signature = "ERST"
+	SigFACP Signature = "FACP"
+	SigFACS Signature = "FACS"
+	SigFPDT Signature = "FPDT"
+	SigGTDT Signature = "GTDT"
+	SigHPET Signature = "HPET"
+	SigHEST Signature = "HEST"
+	SigIBFT Signature = "IBFT"
+	SigIORT Signature = "IORT"
+	SigIVRS Signature = "IVRS"
+	SigLPIT Signature = "LPIT"
+	SigMCFG Signature = "MCFG"
+	SigMCHI Signature = "MCHI"
+	SigMPAM Signature = "MPAM"
+	SigMSCT Signature = "MSCT"
+	SigMSDM Signature = "MSDM"
+	SigMPST Signature = "MPST"
+	SigNFIT Signature = "NFIT"
+	SigOEMx Signature = "OEMx"
+	SigPCCT Signature = "PCCT"
+	SigPHAT Signature = "PHAT"
+	SigPMTT Signature = "PMTT"
+	SigPRMT Signature = "PRMT"
+	SigPSDT Signature = "PSDT"
+	SigRASF Signature = "RASF"
+	SigRGRT Signature = "RGRT"
+	SigRSDT Signature = "RSDT"
+	SigSBST Signature = "SBST"
+	SigSDEI Signature = "SDEI"
+	SigSDEV Signature = "SDEV"
+	SigSLIC Signature = "SLIC"
+	SigSLIT Signature = "SLIT"
+	SigSPCR Signature = "SPCR"
+	SigSPMI Signature = "SPMI"
+	SigSRAT Signature = "SRAT"
+	SigSSDT Signature = "SSDT"
+	SigSTAO Signature = "STAO"
+	SigSVKL Signature = "SVKL"
+	SigTCPA Signature = "TCPA"
+	SigTPM2 Signature = "TPM2"
+	SigUEFI Signature = "UEFI"
+	SigVIOT Signature = "VIOT"
+	SigWAET Signature = "WAET"
+	SigWDAT Signature = "WDAT"
+	SigWDRT Signature = "WDRT"
+	SigWDBT Signature = "WDBT"
+	SigWSMT Signature = "WSMT"
+	SigXENV Signature = "XENV"
+	SigXSDT Signature = "XSDT"
+)

acpi/dsdt.go

@@ -0,0 +1,31 @@
+package acpi
+
+import (
+	"bytes"
+	"encoding/binary"
+)
+
+type DSDT struct {
+	Header
+	*AML
+}
+
+func NewDSDT(oemid, oemtableid string) DSDT {
+	h := newHeader(SigDSDT, 36, 6, oemid, oemtableid)
+	a := NewAML()
+
+	return DSDT{h, a}
+}
+
+func (d *DSDT) ToBytes() ([]byte, error) {
+	var buf bytes.Buffer
+	if err := binary.Write(&buf, binary.LittleEndian, d.Header); err != nil {
+		return nil, err
+	}
+
+	if _, err := buf.Write(d.AML.ToBytes()); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}

acpi/fadt.go

@@ -0,0 +1,129 @@
+package acpi
+
+import (
+	"bytes"
+	"encoding/binary"
+)
+
+type FADTFeatureFlag uint32
+
+const (
+	WBINVD FADTFeatureFlag = 1<<0 + iota
+	WBINVDFlush
+	ProcC1
+	PLvL2Up
+	PwrButton
+	SleepButton
+	FixRTC
+	RTCS4
+	TmrValExt
+	DCKCap
+	ResetRegSup
+	SealedCase
+	Headless
+	CPUSwSleep
+	PCIExpWak
+	UsePlatformClock
+	S4RTCSTSValid
+	RemotePowerOnCapable
+	ForceAPICCluterModel
+	ForceAPICPhysicalDestMode
+	HwReducedACPI
+	LowPowerS0IdleCapable
+)
+
+type FADT struct {
+	Header
+	FirmwareCTRL  uint32
+	DSDTAddr      uint32
+	_             uint8
+	PrefPMProfile uint8
+	SCIInt        uint16
+	SMICmd        uint32
+	ACPIEnable    uint8
+	ACPIDisable   uint8
+	S4BIOSReq     uint8
+	PStateCnt     uint8
+	PM1aEvtBlk    uint32
+	PM1bEvtBlk    uint32
+	PM1aCntBlk    uint32
+	PM1bCntBlk    uint32
+	PM2CntBlk     uint32
+	PMTmrBlk      uint32
+	GPE0Blk       uint32
+	GPE1Blk       uint32
+	PM1EvtLen     uint8
+	PM1CntLen     uint8
+	PM2CntLen     uint8
+	PMTmrLen      uint8
+	GPE0BlkLen    uint8
+	GPE1BlkLen    uint8
+	GPE1Base      uint8
+	CstCnt        uint8
+	PLvL2Lat      uint16
+	PLvL3Lat      uint16
+	FlushSize     uint16
+	FlushStride   uint16
+	DutyOffset    uint8
+	DutyWidth     uint8
+	DayALRM       uint8
+	MonALRM       uint8
+	Century       uint8
+	IAPCBootArch  uint16
+	_             uint8
+	FADTFeatureFlag
+	ResetReg      [12]uint8
+	ResetValue    uint8
+	ARMBootArch   uint16
+	MinorVersion  uint8
+	XFirmwareCntl uint64
+	XDSDT         uint64
+	XPM1aEvtBlk   [12]uint8
+	XPM1bEvtBlk   [12]uint8
+	XPM1aCntBlk   [12]uint8
+	XPM1bCntBlk   [12]uint8
+	XPM2CntBlk    [12]uint8
+	XPMTmrBlk     [12]uint8
+	XGPE0Blk      [12]uint8
+	XGPE1Blk      [12]uint8
+	SleepCtlReg   [12]uint8
+	SleepStatReg  [12]uint8
+	HyperVendorID [8]uint8
+}
+
+func NewFADT(oemid, oemtableid, creatorid string) FADT {
+	h := newHeader(SigFACP, 276, 6, oemid, oemtableid)
+
+	return FADT{
+		Header: h,
+	}
+}
+
+func (f *FADT) ToBytes() ([]byte, error) {
+	var buf bytes.Buffer
+
+	if err := binary.Write(&buf, binary.LittleEndian, f); err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+func (f *FADT) Checksum() error {
+	f.Header.Checksum = 0
+
+	data, err := f.ToBytes()
+	if err != nil {
+		return err
+	}
+
+	cks := uint8(0)
+
+	for _, b := range data {
+		cks += b
+	}
+
+	f.Header.Checksum = cks
+
+	return nil
+}

acpi/header.go

@@ -0,0 +1,61 @@
+package acpi
+
+type Header struct {
+	Signature  [4]byte
+	Length     uint32
+	Rev        uint8
+	Checksum   uint8
+	OEMId      [6]byte
+	OEMTableID [8]byte
+	OEMRev     uint32
+	CreatorID  [4]byte
+	CreatorRev uint32
+}
+
+func convertOEMID(oemID string) [6]byte {
+	var id [6]byte
+
+	for i := 0; i < 6; i++ {
+		id[i] = oemID[i]
+	}
+
+	return id
+}
+
+func convertOEMTableID(oemTableID string) [8]byte {
+	var id [8]byte
+
+	for i := 0; i < 8; i++ {
+		id[i] = oemTableID[i]
+	}
+
+	return id
+}
+
+func convertCreatorID(creatorID string) [4]byte {
+	var id [4]byte
+
+	for i := 0; i < 4; i++ {
+		id[i] = creatorID[i]
+	}
+
+	return id
+}
+
+func newHeader(sig Signature, length uint32, rev uint8, oemID, oemTableID string) Header {
+	creatorID := "GACT" // Go ACPI Tables.
+
+	oid := convertOEMID(oemID)
+	otid := convertOEMTableID(oemTableID)
+	cid := convertCreatorID(creatorID)
+
+	return Header{
+		Signature:  sig.ToBytes(),
+		Length:     length,
+		Rev:        rev,
+		OEMId:      oid,
+		OEMTableID: otid,
+		CreatorID:  cid,
+		CreatorRev: 1,
+	}
+}