RISC-V ISA Explorer · Single-Letter Extensions

Sm: Machine ISA

Ratified 2024-10 · version 1.13.0

Machine privilege level, the highest one, entered at reset and used for low-level control of the hardware platform.

Typical use: Firmware and boot code at the highest privilege

Specification

Open Sm in the explorer

Dependencies

Required by

Instructions (2)

MnemonicNameEncodingMatchMask
MRETMachine-mode Return from Trap001100000010000000000000011100110x302000730xffffffff
WFIWait for interrupt000100000101000000000000011100110x105000730xffffffff

Control and status registers (223)

NameAddressModeDescription
henvcfg0x60aSHypervisor Environment Configuration
henvcfgh0x61aSmost-significant 32 bits of Hypervisor Environment Configuration
marchid0xf12MMachine Architecture ID
mcause0x342MMachine Cause
mconfigptr0xf15MMachine Configuration Pointer
mcountinhibit0x320MMachine Counter Inhibit
mcycle0xb00MMachine Cycle Counter
mcycleh0xb80MHigh-half machine Cycle Counter
menvcfg0x30aMMachine Environment Configuration
menvcfgh0x31aMMachine Environment Configuration
mepc0x341MMachine Exception Program Counter
mhartid0xf14MMachine Hart ID
mhpmcounter100xb0aMMachine Hardware Performance Counter 10
mhpmcounter10h0xb8aMMachine Hardware Performance Counter 10, Upper half
mhpmcounter110xb0bMMachine Hardware Performance Counter 11
mhpmcounter11h0xb8bMMachine Hardware Performance Counter 11, Upper half
mhpmcounter120xb0cMMachine Hardware Performance Counter 12
mhpmcounter12h0xb8cMMachine Hardware Performance Counter 12, Upper half
mhpmcounter130xb0dMMachine Hardware Performance Counter 13
mhpmcounter13h0xb8dMMachine Hardware Performance Counter 13, Upper half
mhpmcounter140xb0eMMachine Hardware Performance Counter 14
mhpmcounter14h0xb8eMMachine Hardware Performance Counter 14, Upper half
mhpmcounter150xb0fMMachine Hardware Performance Counter 15
mhpmcounter15h0xb8fMMachine Hardware Performance Counter 15, Upper half
mhpmcounter160xb10MMachine Hardware Performance Counter 16
mhpmcounter16h0xb90MMachine Hardware Performance Counter 16, Upper half
mhpmcounter170xb11MMachine Hardware Performance Counter 17
mhpmcounter17h0xb91MMachine Hardware Performance Counter 17, Upper half
mhpmcounter180xb12MMachine Hardware Performance Counter 18
mhpmcounter18h0xb92MMachine Hardware Performance Counter 18, Upper half
mhpmcounter190xb13MMachine Hardware Performance Counter 19
mhpmcounter19h0xb93MMachine Hardware Performance Counter 19, Upper half
mhpmcounter200xb14MMachine Hardware Performance Counter 20
mhpmcounter20h0xb94MMachine Hardware Performance Counter 20, Upper half
mhpmcounter210xb15MMachine Hardware Performance Counter 21
mhpmcounter21h0xb95MMachine Hardware Performance Counter 21, Upper half
mhpmcounter220xb16MMachine Hardware Performance Counter 22
mhpmcounter22h0xb96MMachine Hardware Performance Counter 22, Upper half
mhpmcounter230xb17MMachine Hardware Performance Counter 23
mhpmcounter23h0xb97MMachine Hardware Performance Counter 23, Upper half
mhpmcounter240xb18MMachine Hardware Performance Counter 24
mhpmcounter24h0xb98MMachine Hardware Performance Counter 24, Upper half
mhpmcounter250xb19MMachine Hardware Performance Counter 25
mhpmcounter25h0xb99MMachine Hardware Performance Counter 25, Upper half
mhpmcounter260xb1aMMachine Hardware Performance Counter 26
mhpmcounter26h0xb9aMMachine Hardware Performance Counter 26, Upper half
mhpmcounter270xb1bMMachine Hardware Performance Counter 27
mhpmcounter27h0xb9bMMachine Hardware Performance Counter 27, Upper half
mhpmcounter280xb1cMMachine Hardware Performance Counter 28
mhpmcounter28h0xb9cMMachine Hardware Performance Counter 28, Upper half
mhpmcounter290xb1dMMachine Hardware Performance Counter 29
mhpmcounter29h0xb9dMMachine Hardware Performance Counter 29, Upper half
mhpmcounter30xb03MMachine Hardware Performance Counter 3
mhpmcounter300xb1eMMachine Hardware Performance Counter 30
mhpmcounter30h0xb9eMMachine Hardware Performance Counter 30, Upper half
mhpmcounter310xb1fMMachine Hardware Performance Counter 31
mhpmcounter31h0xb9fMMachine Hardware Performance Counter 31, Upper half
mhpmcounter3h0xb83MMachine Hardware Performance Counter 3, Upper half
mhpmcounter40xb04MMachine Hardware Performance Counter 4
mhpmcounter4h0xb84MMachine Hardware Performance Counter 4, Upper half
mhpmcounter50xb05MMachine Hardware Performance Counter 5
mhpmcounter5h0xb85MMachine Hardware Performance Counter 5, Upper half
mhpmcounter60xb06MMachine Hardware Performance Counter 6
mhpmcounter6h0xb86MMachine Hardware Performance Counter 6, Upper half
mhpmcounter70xb07MMachine Hardware Performance Counter 7
mhpmcounter7h0xb87MMachine Hardware Performance Counter 7, Upper half
mhpmcounter80xb08MMachine Hardware Performance Counter 8
mhpmcounter8h0xb88MMachine Hardware Performance Counter 8, Upper half
mhpmcounter90xb09MMachine Hardware Performance Counter 9
mhpmcounter9h0xb89MMachine Hardware Performance Counter 9, Upper half
mhpmevent100x32aMMachine Hardware Performance Counter 10 Control
mhpmevent10h0x72aMMachine Hardware Performance Counter 10 Control, High half
mhpmevent110x32bMMachine Hardware Performance Counter 11 Control
mhpmevent11h0x72bMMachine Hardware Performance Counter 11 Control, High half
mhpmevent120x32cMMachine Hardware Performance Counter 12 Control
mhpmevent12h0x72cMMachine Hardware Performance Counter 12 Control, High half
mhpmevent130x32dMMachine Hardware Performance Counter 13 Control
mhpmevent13h0x72dMMachine Hardware Performance Counter 13 Control, High half
mhpmevent140x32eMMachine Hardware Performance Counter 14 Control
mhpmevent14h0x72eMMachine Hardware Performance Counter 14 Control, High half
mhpmevent150x32fMMachine Hardware Performance Counter 15 Control
mhpmevent15h0x72fMMachine Hardware Performance Counter 15 Control, High half
mhpmevent160x330MMachine Hardware Performance Counter 16 Control
mhpmevent16h0x730MMachine Hardware Performance Counter 16 Control, High half
mhpmevent170x331MMachine Hardware Performance Counter 17 Control
mhpmevent17h0x731MMachine Hardware Performance Counter 17 Control, High half
mhpmevent180x332MMachine Hardware Performance Counter 18 Control
mhpmevent18h0x732MMachine Hardware Performance Counter 18 Control, High half
mhpmevent190x333MMachine Hardware Performance Counter 19 Control
mhpmevent19h0x733MMachine Hardware Performance Counter 19 Control, High half
mhpmevent200x334MMachine Hardware Performance Counter 20 Control
mhpmevent20h0x734MMachine Hardware Performance Counter 20 Control, High half
mhpmevent210x335MMachine Hardware Performance Counter 21 Control
mhpmevent21h0x735MMachine Hardware Performance Counter 21 Control, High half
mhpmevent220x336MMachine Hardware Performance Counter 22 Control
mhpmevent22h0x736MMachine Hardware Performance Counter 22 Control, High half
mhpmevent230x337MMachine Hardware Performance Counter 23 Control
mhpmevent23h0x737MMachine Hardware Performance Counter 23 Control, High half
mhpmevent240x338MMachine Hardware Performance Counter 24 Control
mhpmevent24h0x738MMachine Hardware Performance Counter 24 Control, High half
mhpmevent250x339MMachine Hardware Performance Counter 25 Control
mhpmevent25h0x739MMachine Hardware Performance Counter 25 Control, High half
mhpmevent260x33aMMachine Hardware Performance Counter 26 Control
mhpmevent26h0x73aMMachine Hardware Performance Counter 26 Control, High half
mhpmevent270x33bMMachine Hardware Performance Counter 27 Control
mhpmevent27h0x73bMMachine Hardware Performance Counter 27 Control, High half
mhpmevent280x33cMMachine Hardware Performance Counter 28 Control
mhpmevent28h0x73cMMachine Hardware Performance Counter 28 Control, High half
mhpmevent290x33dMMachine Hardware Performance Counter 29 Control
mhpmevent29h0x73dMMachine Hardware Performance Counter 29 Control, High half
mhpmevent30x323MMachine Hardware Performance Counter 3 Control
mhpmevent300x33eMMachine Hardware Performance Counter 30 Control
mhpmevent30h0x73eMMachine Hardware Performance Counter 30 Control, High half
mhpmevent310x33fMMachine Hardware Performance Counter 31 Control
mhpmevent31h0x73fMMachine Hardware Performance Counter 31 Control, High half
mhpmevent3h0x723MMachine Hardware Performance Counter 3 Control, High half
mhpmevent40x324MMachine Hardware Performance Counter 4 Control
mhpmevent4h0x724MMachine Hardware Performance Counter 4 Control, High half
mhpmevent50x325MMachine Hardware Performance Counter 5 Control
mhpmevent5h0x725MMachine Hardware Performance Counter 5 Control, High half
mhpmevent60x326MMachine Hardware Performance Counter 6 Control
mhpmevent6h0x726MMachine Hardware Performance Counter 6 Control, High half
mhpmevent70x327MMachine Hardware Performance Counter 7 Control
mhpmevent7h0x727MMachine Hardware Performance Counter 7 Control, High half
mhpmevent80x328MMachine Hardware Performance Counter 8 Control
mhpmevent8h0x728MMachine Hardware Performance Counter 8 Control, High half
mhpmevent90x329MMachine Hardware Performance Counter 9 Control
mhpmevent9h0x729MMachine Hardware Performance Counter 9 Control, High half
mideleg0x303MMachine Interrupt Delegation
mie0x304MMachine Interrupt Enable
mimpid0xf13MMachine Implementation ID
minstret0xb02MMachine Instructions Retired Counter
minstreth0xb82MMachine Instructions Retired Counter
mip0x344MMachine Interrupt Pending
misa0x301MMachine ISA Control
mscratch0x340MMachine Scratch Register
mseccfg0x747MMachine Security Configuration
mseccfgh0x757MMost significant 32 bits of Machine Security Configuration
mstatus0x300MMachine Status
mstatush0x310MMachine Status High
mtval0x343MMachine Trap Value
mtvec0x305MMachine Trap Vector Control
mvendorid0xf11MMachine Vendor ID
pmpaddr00x3b0MPMP Address 0
pmpaddr10x3b1MPMP Address 1
pmpaddr100x3baMPMP Address 10
pmpaddr110x3bbMPMP Address 11
pmpaddr120x3bcMPMP Address 12
pmpaddr130x3bdMPMP Address 13
pmpaddr140x3beMPMP Address 14
pmpaddr150x3bfMPMP Address 15
pmpaddr160x3c0MPMP Address 16
pmpaddr170x3c1MPMP Address 17
pmpaddr180x3c2MPMP Address 18
pmpaddr190x3c3MPMP Address 19
pmpaddr20x3b2MPMP Address 2
pmpaddr200x3c4MPMP Address 20
pmpaddr210x3c5MPMP Address 21
pmpaddr220x3c6MPMP Address 22
pmpaddr230x3c7MPMP Address 23
pmpaddr240x3c8MPMP Address 24
pmpaddr250x3c9MPMP Address 25
pmpaddr260x3caMPMP Address 26
pmpaddr270x3cbMPMP Address 27
pmpaddr280x3ccMPMP Address 28
pmpaddr290x3cdMPMP Address 29
pmpaddr30x3b3MPMP Address 3
pmpaddr300x3ceMPMP Address 30
pmpaddr310x3cfMPMP Address 31
pmpaddr320x3d0MPMP Address 32
pmpaddr330x3d1MPMP Address 33
pmpaddr340x3d2MPMP Address 34
pmpaddr350x3d3MPMP Address 35
pmpaddr360x3d4MPMP Address 36
pmpaddr370x3d5MPMP Address 37
pmpaddr380x3d6MPMP Address 38
pmpaddr390x3d7MPMP Address 39
pmpaddr40x3b4MPMP Address 4
pmpaddr400x3d8MPMP Address 40
pmpaddr410x3d9MPMP Address 41
pmpaddr420x3daMPMP Address 42
pmpaddr430x3dbMPMP Address 43
pmpaddr440x3dcMPMP Address 44
pmpaddr450x3ddMPMP Address 45
pmpaddr460x3deMPMP Address 46
pmpaddr470x3dfMPMP Address 47
pmpaddr480x3e0MPMP Address 48
pmpaddr490x3e1MPMP Address 49
pmpaddr50x3b5MPMP Address 5
pmpaddr500x3e2MPMP Address 50
pmpaddr510x3e3MPMP Address 51
pmpaddr520x3e4MPMP Address 52
pmpaddr530x3e5MPMP Address 53
pmpaddr540x3e6MPMP Address 54
pmpaddr550x3e7MPMP Address 55
pmpaddr560x3e8MPMP Address 56
pmpaddr570x3e9MPMP Address 57
pmpaddr580x3eaMPMP Address 58
pmpaddr590x3ebMPMP Address 59
pmpaddr60x3b6MPMP Address 6
pmpaddr600x3ecMPMP Address 60
pmpaddr610x3edMPMP Address 61
pmpaddr620x3eeMPMP Address 62
pmpaddr630x3efMPMP Address 63
pmpaddr70x3b7MPMP Address 7
pmpaddr80x3b8MPMP Address 8
pmpaddr90x3b9MPMP Address 9
pmpcfg00x3a0MPMP Configuration Register 0
pmpcfg10x3a1MPMP Configuration Register 1
pmpcfg100x3aaMPMP Configuration Register 10
pmpcfg110x3abMPMP Configuration Register 11
pmpcfg120x3acMPMP Configuration Register 12
pmpcfg130x3adMPMP Configuration Register 13
pmpcfg140x3aeMPMP Configuration Register 14
pmpcfg150x3afMPMP Configuration Register 15
pmpcfg20x3a2MPMP Configuration Register 2
pmpcfg30x3a3MPMP Configuration Register 3
pmpcfg40x3a4MPMP Configuration Register 4
pmpcfg50x3a5MPMP Configuration Register 5
pmpcfg60x3a6MPMP Configuration Register 6
pmpcfg70x3a7MPMP Configuration Register 7
pmpcfg80x3a8MPMP Configuration Register 8
pmpcfg90x3a9MPMP Configuration Register 9