rv csrs

Unprivileged Floating-Point CSRs

Number	Privilege	Name	Description
0x001	URW	fflags	Floating-Point Accrued Exceptions.
0x002	URW	frm	Floating-Point Dynamic Rounding Mode.
0x003	URW	fcsr	Floating-Point Control and Status Register (frm + fflags).

Unprivileged Counter/Timers

Number	Privilege	Name	Description
0xC00	URO	cycle	Cycle counter for RDCYCLE instruction.
0xC01	URO	time	Timer for RDTIME instruction.
0xC02	URO	instret	Instructions-retired counter for RDINSTRET instruction.
0xC03	URO	hpmcounter3	Performance-monitoring counter.
0xC04	URO	hpmcounter4	Performance-monitoring counter.
...	...	...	...
0xC1F	URO	hpmcounter31	Performance-monitoring counter.
0xC80	URO	cycleh	Upper 32 bits of cycle, RV32 only.
0xC81	URO	timeh	Upper 32 bits of time, RV32 only.
0xC82	URO	instreth	Upper 32 bits of instret, RV32 only.
0xC83	URO	hpmcounter3h	Upper 32 bits of hpmcounter3, RV32 only.
0xC84	URO	hpmcounter4h	Upper 32 bits of hpmcounter4, RV32 only.
...	...	...	...
0xC9F	URO	hpmcounter31h	Upper 32 bits of hpmcounter31, RV32 only.

Supervisor Trap Setup

Number	Privilege	Name	Description
0x100	SRW	sstatus	Supervisor status register.
0x104	SRW	sie	Supervisor interrupt-enable register.
0x105	SRW	stvec	Supervisor trap handler base address.
0x106	SRW	scounteren	Supervisor counter enable.

Supervisor Configuration

Number	Privilege	Name	Description
0x10A	SRW	senvcfg	Supervisor environment configuration register.

Supervisor Trap Handling

Number	Privilege	Name	Description
0x140	SRW	sscratch	Scratch register for supervisor trap handlers.
0x141	SRW	sepc	Supervisor exception program counter.
0x142	SRW	scause	Supervisor trap cause.
0x143	SRW	stval	Supervisor bad address or instruction.
0x144	SRW	sip	Supervisor interrupt pending.

Supervisor Protection and Translation

Number	Privilege	Name	Description
0x180	SRW	satp	Supervisor address translation and protection.

Debug/Trace Registers

Number	Privilege	Name	Description
0x5A8	SRW	scontext	Supervisor-mode context register.

Hypervisor Trap Setup

Number	Privilege	Name	Description
0x600	HRW	hstatus	Hypervisor status register.
0x602	HRW	hedeleg	Hypervisor exception delegation register.
0x603	HRW	hideleg	Hypervisor interrupt delegation register.
0x604	HRW	hie	Hypervisor interrupt-enable register.
0x606	HRW	hcounteren	Hypervisor counter enable.
0x607	HRW	hgeie	Hypervisor guest external interrupt-enable register.

Hypervisor Trap Handling

Number	Privilege	Name	Description
0x643	HRW	htval	Hypervisor bad guest physical address.
0x644	HRW	hip	Hypervisor interrupt pending.
0x645	HRW	hvip	Hypervisor virtual interrupt pending.
0x64A	HRW	htinst	Hypervisor trap instruction (transformed).
0xE12	HRO	hgeip	Hypervisor guest external interrupt pending.

Hypervisor Configuration

Number	Privilege	Name	Description
0x60A	HRW	henvcfg	Hypervisor environment configuration register.
0x61A	HRW	henvcfgh	Additional hypervisor env. conf. register, RV32 only.

Hypervisor Protection and Translation

Number	Privilege	Name	Description
0x680	HRW	hgatp	Hypervisor guest address translation and protection.

Debug/Trace Registers

Number	Privilege	Name	Description
0x6A8	HRW	hcontext	Hypervisor-mode context register.

Hypervisor Counter/Timer Virtualization Registers

Number	Privilege	Name	Description
0x605	HRW	htimedelta	Delta for VS/VU-mode timer.
0x615	HRW	htimedeltah	Upper 32 bits of htimedelta, HSXLEN=32 only.

Virtual Supervisor Registers

Number	Privilege	Name	Description
0x200	HRW	vsstatus	Virtual supervisor status register.
0x204	HRW	vsie	Virtual supervisor interrupt-enable register.
0x205	HRW	vstvec	Virtual supervisor trap handler base address.
0x240	HRW	vsscratch	Virtual supervisor scratch register.
0x241	HRW	vsepc	Virtual supervisor exception program counter.
0x242	HRW	vscause	Virtual supervisor trap cause.
0x243	HRW	vstval	Virtual supervisor bad address or instruction.
0x244	HRW	vsip	Virtual supervisor interrupt pending.
0x280	HRW	vsatp	Virtual supervisor address translation and protection.

Machine Information Registers

Number	Privilege	Name	Description
0xF11	MRO	mvendorid	Vendor ID.
0xF12	MRO	marchid	Architecture ID.
0xF13	MRO	mimpid	Implementation ID.
0xF14	MRO	mhartid	Hardware thread ID.
0xF15	MRO	mconfigptr	Pointer to configuration data structure.

Machine Trap Setup

Number	Privilege	Name	Description
0x300	MRW	mstatus	Machine status register.
0x301	MRW	misa	ISA and extensions.
0x302	MRW	medeleg	Machine exception delegation register.
0x303	MRW	mideleg	Machine interrupt delegation register.
0x304	MRW	mie	Machine interrupt-enable register.
0x305	MRW	mtvec	Machine trap-handler base address.
0x306	MRW	mcounteren	Machine counter enable.
0x310	MRW	mstatush	Additional machine status register, RV32 only.

Machine Trap Handling

Number	Privilege	Name	Description
0x340	MRW	mscratch	Scratch register for machine trap handlers.
0x341	MRW	mepc	Machine exception program counter.
0x342	MRW	mcause	Machine trap cause.
0x343	MRW	mtval	Machine bad address or instruction.
0x34A	MRW	mip	Machine interrupt pending.
0x344	MRW	mtinst	Machine trap instruction (transformed).
0x34B	MRW	mtval2	Machine bad guest physical address.

Machine Configuration

Number	Privilege	Name	Description
0x30A	MRW	menvcfg	Machine environment configuration register.
0x31A	MRW	menvcfgh	Additional machine env. conf. register, RV32 only.
0x747	MRW	mseccfg	Machine security configuration register.
0x757	MRW	mseccfgh	Additional machine security conf. register, RV32 only.

Machine Memory Protection

Number	Privilege	Name	Description
0x3A0	MRW	pmpcfg0	Physical memory protection configuration.
0x3A1	MRW	pmpcfg1	Physical memory protection configuration, RV32 only.
0x3A2	MRW	pmpcfg2	Physical memory protection configuration.
0x3A3	MRW	pmpcfg3	Physical memory protection configuration, RV32 only.
...	...	...	...
0x3AE	MRW	pmpcfg14	Physical memory protection configuration.
0x3AF	MRW	pmpcfg15	Physical memory protection configuration, RV32 only.
0x3B0	MRW	pmpaddr0	Physical memory protection address register.
0x3B1	MRW	pmpaddr1	Physical memory protection address register.
...	...	...	...
0x3EF	MRW	pmpaddr63	Physical memory protection address register.

Machine Counter/Timers

Number	Privilege	Name	Description
0xB00	MRW	mcycle	Machine cycle counter.
0xB02	MRW	minstret	Machine instructions-retired counter.
0xB03	MRW	mhpmcounter3	Machine performance-monitoring counter.
0xB04	MRW	mhpmcounter4	Machine performance-monitoring counter.
...	...	...	...
0xB1F	MRW	mhpmcounter31	Machine performance-monitoring counter.
0xB80	MRW	mcycleh	Upper 32 bits of mcycle, RV32 only.
0xB82	MRW	minstreth	Upper 32 bits of minstret, RV32 only.
0xB83	MRW	mhpmcounter3h	Upper 32 bits of mhpmcounter3, RV32 only.
0xB84	MRW	mhpmcounter4h	Upper 32 bits of mhpmcounter4, RV32 only.
...	...	...	...
0xB9F	MRW	mhpmcounter31h	Upper 32 bits of mhpmcounter31, RV32 only.

Machine Counter Setup

Number	Privilege	Name	Description
0x320	MRW	mcountinhibit	Machine counter-inhibit register.
0x323	MRW	mhpmevent3	Machine performance-monitoring event selector.
0x324	MRW	mhpmevent4	Machine performance-monitoring event selector.
...	...	...	...
0x33F	MRW	mhpmevent31	Machine performance-monitoring event selector.

Debug/Trace Registers (shared with Debug Mode)

Number	Privilege	Name	Description
0x7A0	MRW	tselect	Debug/Trace trigger register select.
0x7A1	MRW	tdata1	First Debug/Trace trigger data register.
0x7A2	MRW	tdata2	Second Debug/Trace trigger data register.
0x7A3	MRW	tdata3	Third Debug/Trace trigger data register.
0x7A8	MRW	mcontext	Machine-mode context register.

Debug Mode Registers

Number	Privilege	Name	Description
0x7B0	DRW	dcsr	Debug control and status register.
0x7B1	DRW	dpc	Debug PC.
0x7B2	DRW	dscratch0	Debug scratch register 0.
0x7B3	DRW	dscratch1	Debug scratch register 1.