kolibrios-nvme-driver/drivers/nvme/nvme.inc

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;;                                                                 ;;
;; Copyright (C) KolibriOS team 2004-2024. All rights reserved.    ;;
;; Distributed under terms of the GNU General Public License       ;;
;;                                                                 ;;
;;          GNU GENERAL PUBLIC LICENSE                             ;;
;;             Version 2, June 1991                                ;;
;;                                                                 ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

; NVMe Controller Versions
VS100 = 0x00010000 ; (v1.0.0)
VS110 = 0x00010100 ; (v1.1.0)
VS120 = 0x00010200 ; (V1.2.0)
VS121 = 0x00010201 ; (v1.2.1)
VS130 = 0x00010300 ; (v1.3.0)
VS140 = 0x00010400 ; (v1.4.0)

NVM_CMDS = 64       ; Number of Commands
NVM_MPS = 0         ; Memory Page Size (2 ^ (12 + MPS))
NVM_ASQS = 63        ; Admin Submission Queue Size
NVM_ACQS = NVM_ASQS ; Admin Completion Queue Size
LAST_QUEUE_ID = 1 ; Index of the last queue
SQ_ENTRIES = NVM_ASQS ; I/O and Admin Submission Queue Size
CQ_ENTRIES = NVM_ACQS ; I/O and Admin Completion Queue Size
PAGE_SIZE = 4096 shl NVM_MPS
SUPPORTED_LBADS = 9 ; KolibriOS only supports LBADS of 512, later on we may remove this restriction

ADMIN_QUEUE = 0 ; Admin Queue ID

IEN_ON = 2
IEN_OFF = 0

; Opcodes for NVM commands
NVM_CMD_FLUSH = 0x00 
NVM_CMD_WRITE = 0x01
NVM_CMD_READ = 0x02
NVM_CMD_WRITE_UNCORRECTABLE = 0x04
NVM_CMD_COMPARE = 0x05
NVM_CMD_WRITE_ZEROES = 0x08
NVM_CMD_DATASET_MANAGEMENT = 0x09
NVM_CMD_VERIFY = 0x0C
NVM_CMD_RESERVATION_REG = 0x0D
NVM_CMD_RESERVATION_REPORT = 0x0E
NVM_CMD_RESERVATION_ACQUIRE = 0x11
NVM_CMD_RESERVATION_RELEASE = 0x15
NVM_CMD_COPY = 0x19

; Opcodes for admin commands (Page 94 of NVMe 1.4 spec)
ADM_CMD_DEL_IO_SUBMISSION_QUEUE = 0x00
ADM_CMD_CRE_IO_SUBMISSION_QUEUE = 0x01
ADM_CMD_GET_LOG_PAGE = 0x02
ADM_CMD_DEL_IO_COMPLETION_QUEUE = 0x04
ADM_CMD_CRE_IO_COMPLETION_QUEUE = 0x05
ADM_CMD_IDENTIFY = 0x06
ADM_CMD_ABORT = 0x08
ADM_CMD_SET_FEATURES = 0x09
ADM_CMD_GET_FEATURES = 0x0A

; fuse (fused operation): In a fused operation, a complex command is created by 'fusing' together
;                         two simpler commands. This field specifies whether this command is part
;                         of a fused operation, and if so, which command it is in the sequence:
;                         00b -> Normal operation
;                         01b -> Fused operation, first command
;                         10b -> Fused operation, second command
;                         11b -> Reserved
NO_FUSE = 0
FUSE_OP_FIRST_CMD = 1 shl 8
FUSE_OP_SECOND_CMD = 2 shl 8

; sel (PRP or SGL for data transfer): This field specifies whether PRPs or SGLs are used for any
;                                     data transfer associated with the command. PRPs shall be
;                                     used for all Admin commands for NVMe over PCIe implementations.
;                                     SGLs shall be used for all Admin and I/O commands for NVMe over
;                                     Fabrics implementations (i.e., field set to 01b):
;                                     00b -> PRPs are used for this transfer
;                                     01b -> SGLs are used for this transfer, MPTR will contain address of 
;                                            a single contiguous physical buffer that is byte aligned
;                                     10b -> SGLs are used for this transfer. MPTR will contain address of
;                                            an SGL segment containing exactly one SGL descriptor that is
;                                            QWORD aligned
;                                     11b -> Reserved
SEL_PRP = 0
SEL_SGL = 1 shl 14

; Controller or Namespace Structure (CNS) specifies the information to be returned to the host.
CNS_IDNS   = 0x0  ; Namespace data structure (NSID)
CNS_IDCS   = 0x1  ; Controller data structure
CNS_ANIDL  = 0x2  ; Active namespace ID list (NSID)
CNS_NIDL   = 0x3  ; Namespace identification descriptor list (NSID)
CNS_NVM_SL = 0x4  ; NVM Set List 

; Optional Admin Command Support (OACS) values
OACS_SEC_SEN_RECV_SUPPORTED = 1 shl 0
OACS_FMT_NVM_SUPPORTED = 1 shl 1
OACS_FIRM_COMDL_SUPPORTED = 1 shl 2
OACS_NSMAN_SUPPORTED = 1 shl 3

; scope is all attached namespaces or all namespaces in NVM subsystem
NSID_BROADCAST = 0xFFFFFFFF

NSSRC_RESET = 0x4E564D65 ; "NVMe" (initiates a NVMe subsystem reset)

; NVMe Capabilities
CAP_MQES = 0xff
CAP_CQR = 1 shl 16
CAP_AMS = (1 shl 17) or (1 shl 18)
CAP_TO = 0xff000000
CAP_DSTRD = 1 or (1 shl 1) or (1 shl 2) or (1 shl 3)
CAP_NSSRS = 1 shl 4
CAP_CSS_NVM_CMDSET = 1 shl 5
CAP_CSS_NOIO = 1 shl 12
CAP_BPS = 1 shl 14
CAP_CPS_COSCOP = 1 shl 15
CAP_CPS_DOSCOP = 1 shl 16
CAP_CPS_NVMSCOP = CAP_CPS_COSCOP or CAP_CPS_DOSCOP
CAP_MPSMIN = (1 shl 17) or (1 shl 18) or (1 shl 19) or (1 shl 20)
CAP_MPSMAX = (1 shl 21) or (1 shl 22) or (1 shl 23) or (1 shl 24)
CAP_PMRS = 1 shl 25
CAP_CMBS = 1 shl 26
CAP_NSSS = 1 shl 27
CAP_CRMS_CRWMS = 1 shl 28
CAP_CRMS_CRIMS = 1 shl 29

; Controller Configuration Bits
CC_EN = 1
CC_CSS = (1 shl 4) or (1 shl 5) or (1 shl 6)
CC_MPS = (1 shl 7) or (1 shl 8) or (1 shl 9) or (1 shl 10)
CC_AMS = (1 shl 11) or (1 shl 12) or (1 shl 13)
CC_SHN = (1 shl 14) or (1 shl 15)
CC_IOSQES = (1 shl 16) or (1 shl 17) or (1 shl 18) or (1 shl 19)
CC_IOCQES = (1 shl 20) or (1 shl 21) or (1 shl 22) or (1 shl 23)
CC_CRIME = 1 shl 24

CC_DEFAULT_IOSQES = 6 shl 16
CC_DEFAULT_IOCQES = 4 shl 16

; Completion Queue Entry Status Field Values
CQ_PHASE_TAG = 1 shl 0
CQ_STATUS_SC = 0xfe
CQ_STATUS_SCT = (1 shl 9) or (1 shl 10) or (1 shl 11)
CQ_STATUS_CRD = (1 shl 12) or (1 shl 13)
CQ_STATUS_M = 1 shl 14
CQ_STATUS_DNR = 1 shl 15

; Completion Queue Entry Status Field - Status Code Type Values
CQ_STATUS_SCT_GCS   = 0x0 ; Generic Command Status
CQ_STATUS_SCT_CSS   = 0x1 ; Command Specific Status
CQ_STATUS_SCT_MADIE = 0x2 ; Media and Data Integrity Errors
CQ_STATUS_SCT_PRS   = 0x3 ; Path Related Status

; Completion Queue Entry Status Field - Status Code Generic Command Values
CQ_STATUS_SC_GCS_SUCCESS = 0x00 ; Successful Completion
CQ_STATUS_SC_GCS_ICOP    = 0x01 ; Invalid Command Opcode
CQ_STATUS_SC_GCS_IFIC    = 0x02 ; Invalid Field in Command
CQ_STATUS_SC_GCS_CIDC    = 0x03 ; Command ID Conflict
CQ_STATUS_SC_GCS_DTE     = 0x04 ; Data Transfer Error
CQ_STATUS_SC_GCS_CAPLN   = 0x05 ; Commands Aborted due to Power Loss Notification
CQ_STATUS_SC_GCS_INERR   = 0x06 ; Internal Error
CQ_STATUS_SC_GCS_CAR     = 0x07 ; Command Abort Requested
CQ_STATUS_SC_GCS_CASQD   = 0x08 ; Command Aborted due to SQ Deletion
CQ_STATUS_SC_GCS_CAFFC   = 0x09 ; Command Aborted due to Failed Fused Command
CQ_STATUS_SC_GCS_CAMFC   = 0x0A ; Command Aborted due to Missing Fused Command
CQ_STATUS_SC_GCS_INNOF   = 0x0B ; Invalid Namespace or Format
CQ_STATUS_SC_GCS_CSE	 = 0x0C ; Command Sequence Error
CQ_STATUS_SC_GCS_INSGL   = 0x0D ; Invalid SGL Segment Descriptor
CQ_STATUS_SC_GCS_INNSGL  = 0x0E ; Invalid Number of SGL Descriptors
CQ_STATUS_SC_GCS_OPDEN   = 0x15 ; Operation Denied
CQ_STATUS_SC_GCS_NSIWP   = 0x20 ; Namespace is Write Protected
CQ_STATUS_SC_GCS_CINT    = 0x21 ; Command Interrupted
CQ_STATUS_SC_GCS_TTE     = 0x22 ; Transient Transport Error

; Completion Queue Entry Status Field - Status Code Media and Data Integrity Errors
CQ_STATUS_SC_MADIE_WF    = 0x80 ; Write Fault
CQ_STATUS_SC_MADIE_URE   = 0x81 ; Unrecovered Read Error
CQ_STATUS_SC_MADIE_ACDEN = 0x86 ; Access Denied
CQ_STATUS_SC_MADIE_DOULB = 0x87 ; Deallocated or Unwritten Logical Block

; Controller Status (CSTS) Values
CSTS_RDY = 1
CSTS_CFS = 1 shl 1
CSTS_SHST = (1 shl 2) or (1 shl 3)
CSTS_NSSRO = 1 shl 4
CSTS_PP = 1 shl 5

; Admin Queue Attributes (AQA) Values
AQA_ASQS = 0xfff
AQA_ACQS = 0xfff shl 16

; CDW10.SEL Values (Page 115 of NVMe 1.4 specification)
CDW10_SEL_CURRENT = 000b
CDW10_SEL_DEFAULT = 001b
CDW10_SEL_SAVED = 010b
CDW10_SEL_SUPPORTED_CAPABILITIES = 011b

; Feature Identifiers (FID) Values (Page 206 of NVMe 1.4 specification)
; Used in Get/Set Features Commands
FID_ARBITRATION = 0x01
FID_POWER_MANAGEMENT = 0x02
FID_LBA_RANGE_TYPE = 0x03
FID_TEMPERATURE_THRESHOLD = 0x04
FID_ERROR_RECOVERY = 0x05
FID_VOLATILE_WRITE_CACHE = 0x06
FID_NUMBER_OF_QUEUES = 0x07
FID_INTERRUPT_COALESCING = 0x08
FID_INTERRUPT_VECTOR_CONFIGURATION = 0x09
FID_WRITE_ATOMICITY_NORMAL = 0x0A
FID_ASYNCHRONOUS_EVENT_CONFIGURATION = 0x0B
FID_AUTONOMOUS_POWER_STATE_TRANSITION = 0x0C
FID_HOST_MEMORY_BUFFER = 0x0D
FID_TIMESTAMP = 0x0E
FID_KEEP_ALIVE_TIMER = 0x0F
FID_HOST_CONTROLLED_THERMAL_MANAGEMENT = 0x10
FID_NON_OPERATIONAL_POWER_STATE_CONFIG = 0x11
FID_READ_RECOVERY_LEVEL_CONFIG = 0x12
FID_PREDICTABLE_LATENCY_MODE_CONFIG = 0x13
FID_PREDICTABLE_LATENCY_MODE_WINDOW = 0x14
FID_LBA_STATUS_INFORMATION_REPORT_INTERVAL = 0x15
FID_HOST_BEHAVIOR_SUPPORT = 0x16
FID_SANITIZE_CONFIG = 0x17
FID_ENDURANCE_GROUP_EVENT_CONFIGURATION = 0x18
; NVM Command Set Specific - FID
FID_SOFTWARE_PROGRESS_MARKER = 0x80
FID_HOST_IDENTIFIER = 0x81
FID_RESERVATION_NOTIFICATION_MASK = 0x82
FID_RESERVATION_PERSISTENCE = 0x83
FID_NAMESPACE_WRITE_PROTECTION_CONFIG = 0x84

; Get Log Page - Log Page Identifiers (Page 118-119 of NVMe 1.4 specification)
LID_ERROR_INFORMATION = 0x01
LID_SMARTHEALTH_INFORMATION = 0x02
LID_FIRMWARE_SLOT_INFORMATION = 0x03
LID_CHANGED_NAMESPACE_LIST = 0x04
LID_COMMANDS_SUPPORTED_AND_EFFECTS = 0x05
LID_DEVICE_SELF_TEST = 0x06
LID_TELEMETRY_HOST_INITIATED = 0x07
LID_TELEMETRY_CONTROLLER_INITIATED = 0x08
LID_ENDURANCE_GROUP_INFORMATION = 0x09
LID_PREDICTABLE_LATENCY_PER_NVM_SET = 0x0A
LID_PREDICTABLE_LATENCY_EVENT_AGGREGATE = 0x0B
LID_ASYMMETRIC_NAMESPACE_ACCESS = 0x0C
LID_PERSISTENT_EVENT_LOG = 0x0D
LID_LBA_STATUS_INFORMATION = 0x0E
LID_ENDURANCE_GROUP_EVENT_AGGREGATE = 0x0F
; I/O Command Set Specific - Log Page Identifiers
LID_RESERVATION_NOTIFICATION = 0x80
LID_SANITIZE_STATUS = 0x81

; Controller Type Values
CNTRLTYPE_IO_CONTROLLER = 0x1
CNTRLTYPE_DISCOVERY_CONTROLLER = 0x2
CNTRLTYPE_ADMIN_CONTROLLER = 0x3

struct NVME_MMIO 
	CAP      dq ? ; Controller Capabilities
	VS       dd ? ; Version
	INTMS    dd ? ; Interrupt Mask Set
	INTMC    dd ? ; Interrupt Mask Clear
	CC       dd ? ; Controller Configuration
	         rd 1 ; Reserved
	CSTS     dd ? ; Controller Status
	NSSR     dd ? ; NVM Subsystem Reset
	AQA      dd ? ; Admin Queue Attributes
	ASQ      dq ? ; Admin Submission Queue Base Address
	ACQ      dq ? ; Admin Completion Queue Base Address
	CMBLOC   dd ? ; Controller Memory Buffer Location
	CMBSZ    dd ? ; Controller Memory Buffer Size
	BPINFO   dd ? ; Boot Partition Information
	BPRSEL   dd ? ; Boot Partition Read Select
	BPMBL    dq ? ; Boot Partition Memory Buffer Location
	CMBMSC   dd ? ; Controller Memory Buffer Memory Space
	CMBSTS   dd ? ; Controller Memory Buffer Status
	    	 rb 3492 ; Reserved
	PMRCAP   dd ? ; Persistent Memory Capabilities
	PMRCTL   dd ? ; Persistent Memory Region Control
	PMRSTS   dd ? ; Persistent Memory Region Status
	PMREBS   dd ? ; Persistent Memory Region Elasticity Buffer Size
	PMRSWTP  dd ? ; Persistent Memory Region Sustained Write Throughput
	PMRMSC   dq ? ; Persistent Memory Region Controller Memory Space Control
	    	 rb 484 ; Reserved
	SQ0TDBL  dd ? ; Submission Queue 0 Tail Doorbell (Admin)
ends

; Submission Queue Entry (64 bytes)
struct SQ_ENTRY
	cdw0 	    	dd ?
	nsid 	    	dd ?
	cdw2            dd ?
	cdw3            dd ?
	mptr	    	dq ?
	prp1	    	dq ?
	prp2            dq ?
	cdw10	    	dd ?
	cdw11	    	dd ?
	cdw12	    	dd ?
	cdw13	    	dd ?
	cdw14	    	dd ?
	cdw15	    	dd ?
ends

; Completion Queue Entry (16 bytes) - See page 77 of the NVMe 1.4 spec
struct CQ_ENTRY 
	cdw0 	    	dd ?
	    		rd 1 ; reserved
	sqhd            dw ?
	sqid            dw ?
	cid             dw ?
	status 	    	dw ?
ends

struct NSINFO
	capacity 	dq ?
	size 	    	dq ?
	nsid 	    	dd ?
	pci 	    	dd ?
	lbads 	    	db ?
	features 	db ?
ends

struct pcidev 
	bus 	    	db ?
	devfn 	    	db ?
	ipin 	    	db ?
	iline 	        db ?
	num 	    	dd ?
	io_addr 	dd ?
	queue_entries 	dd ?
	version 	dd ?
	nsid 	    	dd ?
	nsinfo 	    	dd ?
	nn 	    	dd ?
	dstrd 	    	db ?
	    		rb 3 ; align
	serial 	    	dt ?, ?
	model 	    	dt ?, ?, ?, ?
ends
TOTAL_PCIDEVS = 4
TOTAL_PCIDEVS_MALLOC_SZ = TOTAL_PCIDEVS * sizeof.pcidev

struct DPTR
	prp1 	    	dd ?
	prp2 	    	dd ?
ends

struct NVM_QUEUE_ENTRY
	tail 	    	dw ?
	head 	    	dw ?
	sq_ptr 	    	dd ?
	cq_ptr 	    	dd ?
	cid_slots 	dq ?
	phase_tag 	dd ?
ends

; Identify Controller Data Structure
struct IDENTC

	vid	   dw ?
	ssvid      dw ?
	sn         dt ?, ?
	mn         dt ?, ?, ?, ?
	fr         dq ?
	rab        db ?
	ieee       db ?, ?, ?
	cmic       db ?
	mdts       db ?
	cntlid     dw ?
	ver        dd ?
	rtd3r      dd ?
	rtd3e      dd ?
	oaes 	   dd ?
	ctratt     dd ?
	rrls       dw ?
	           rb 9       ; reserved
	cntrltype  db ?
	fguid      dq ?, ?
	crdt1      dw ?
	crdt2      dw ?
	crdt3      dw ?
	           rb 106     ; reserved
	           rb 16      ; reserved (NVMMI)
	oacs 	   dw ?
	acl 	   db ?
	aerl 	   db ?
	frmw 	   db ?
	lpa 	   db ?
	elpe 	   db ?
	npss 	   db ?
	avscc 	   db ?
	apsta 	   db ?
	wctemp 	   dw ?
	cctemp 	   dw ?
	mtfa 	   dw ?
	hmpre 	   dd ?
	hmmin 	   dd ?
	tnvmcap    dq ?, ?
	unvmcap    dq ?, ?
	rpmbs 	   dd ?
	edstt 	   dw ?
	dsto 	   db ?
	fwug 	   db ?
	kas 	   dw ?
	hctma 	   dw ?
	mntmt 	   dw ?
	mxtmt 	   dw ?
	sanicap    dd ?
	hmminds    dd ?
	hmmaxd     dw ?
	nsetidmax  dw ?
	endgidmax  dw ?
	anatt      db ?
	anacap 	   db ?
	anagrpmax  dd ?
	nanagrpid  dd ?
	pels 	   dd ?
	    	   rb 156
	sqes  	   db ?
	cqes 	   db ?
	maxcmd 	   dw ?
	nn         dd ?
	oncs 	   dw ?
	fuses  	   dw ?
	fna 	   db ?
	vwc 	   db ?
	awun 	   dw ?
	awupf 	   dw ?
	nvscc  	   db ?
	nwpc 	   db ?
	acwu 	   dw ?
	    	   rb 2
	sgls 	   dd ?
	mnan 	   dd ?
	    	   rb 224
	subnqn 	   dq ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?
	    	   rb 768
	    	   rb 256
	psd0 	   dq ?, ?, ?, ?
	psd1	   dq ?, ?, ?, ?
	psd2  	   dq ?, ?, ?, ?
	psd3  	   dq ?, ?, ?, ?
	psd4 	   dq ?, ?, ?, ?
	psd5 	   dq ?, ?, ?, ?
	psd6       dq ?, ?, ?, ? 
	psd7  	   dq ?, ?, ?, ?
	psd8  	   dq ?, ?, ?, ?
	psd9 	   dq ?, ?, ?, ?
	psd10 	   dq ?, ?, ?, ?
	psd11 	   dq ?, ?, ?, ?
	psd12 	   dq ?, ?, ?, ?
	psd13      dq ?, ?, ?, ?
	psd14 	   dq ?, ?, ?, ?
	psd15  	   dq ?, ?, ?, ?
	psd16 	   dq ?, ?, ?, ?
	psd17  	   dq ?, ?, ?, ?
	psd18  	   dq ?, ?, ?, ?
	psd19  	   dq ?, ?, ?, ?
	psd20  	   dq ?, ?, ?, ?
	psd21 	   dq ?, ?, ?, ?
	psd22 	   dq ?, ?, ?, ?
	psd23 	   dq ?, ?, ?, ?
	psd24  	   dq ?, ?, ?, ?
	psd25 	   dq ?, ?, ?, ?
	psd26 	   dq ?, ?, ?, ?
	psd27 	   dq ?, ?, ?, ?
	psd28 	   dq ?, ?, ?, ?
	psd29 	   dq ?, ?, ?, ?
	psd30 	   dq ?, ?, ?, ?
	psd31 	   dq ?, ?, ?, ?
	    	   rb 1024
ends

; Identify Namespace Data Structure
struct IDENTN
	nsze 	   dq ?
	ncap 	   dq ?
	nuse  	   dq ?
	nsfeat     db ?
	nlbaf 	   db ?
	flbas 	   db ?
	mc 	   db ?
	dpc 	   db ?
	dps 	   db ?
	nmic 	   db ?
	rescap 	   db ?
	fpi 	   db ?
	dlfeat 	   db ?
	nawun 	   dw ?
	nawupf 	   dw ?
	nacwu 	   dw ?
	nabsn      dw ?
	nabo 	   dw ?
	nabspf 	   dw ?
	noiob 	   dw ?
	nvmcap 	   dq ?
	           dq ?
	npwg 	   dw ?
	npwa 	   dw ?
	npdg 	   dw ?
	npda 	   dw ?
	nows 	   dw ?
	           rb 18
	anagrpid   dd ?
	           rb 3
	nsattr 	   db ?
	nvmsetid   dw ?
	endgid 	   dw ?
	nguid 	   dq ?
	           dq ?
	eui64 	   dq ?
	lbaf0	   dd ?
	lbaf1 	   dd ? 
	lbaf2 	   dd ?
	lbaf3	   dd ?
	lbaf4	   dd ?
	lbaf5	   dd ?
	lbaf6	   dd ?
	lbaf7	   dd ?
	lbaf8	   dd ?
	lbaf9	   dd ?
	lbaf10	   dd ?
	lbaf11	   dd ?
	lbaf12	   dd ?
	lbaf13	   dd ?
	lbaf14	   dd ?
	lbaf15	   dd ?
	           rb 3904
ends

; Namespace Granularity List (CNS 16h - Page 199 of NVMe specification 1.4)
struct NSGRANLS 
	
	nga 	   dd ?
	nod 	   db ?
	    	   rb 27 ; reserved
	ngd0 	   dq ?, ?
	ngd1       dq ?, ?
	ngd2       dq ?, ?
	ngd3       dq ?, ?
	ngd4       dq ?, ?
	ngd5       dq ?, ?
	ngd6       dq ?, ?
	ngd7       dq ?, ?
	ngd8       dq ?, ?
	ngd9       dq ?, ?
	ngd10      dq ?, ?
	ngd11      dq ?, ?
	ngd12      dq ?, ?
	ngd13      dq ?, ?
	ngd14      dq ?, ?
	ngd15      dq ?, ?

ends

;vim: filetype=asm