2 stable releases
2.1.1 | Jan 6, 2023 |
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1.4.1 | Nov 1, 2019 |
#1750 in Embedded development
5,415 stars & 122 watchers
17KB
277 lines
RISC-V CSR Interface for Tock
This library is based on the Tock Register Interface to provide a consistent interface for accessing the CSRs (Control and Status Registers) on RISC-V platforms.
Example Usage
use riscv_csr::csr::ReadWriteRiscvCsr;
// Bit definitions for the `mstatus` register. Need these for all registers.
register_bitfields![u32,
mstatus [
uie OFFSET(0) NUMBITS(1) [],
sie OFFSET(1) NUMBITS(1) [],
mie OFFSET(3) NUMBITS(1) [],
upie OFFSET(4) NUMBITS(1) [],
spie OFFSET(5) NUMBITS(1) [],
mpie OFFSET(7) NUMBITS(1) [],
spp OFFSET(8) NUMBITS(1) [],
mpp OFFSET(11) NUMBITS(2) [
USER = 0,
SUPERVISOR = 1,
RESERVED = 2,
MACHINE = 3
]
]
]
/// Setup the struct of CSR register names.
#[repr(C)]
pub struct CSR {
pub pmpcfg0: ReadWriteRiscvCsr<u32, pmpconfig::pmpcfg::Register>,
pub pmpcfg1: ReadWriteRiscvCsr<u32, pmpconfig::pmpcfg::Register>,
pub pmpcfg2: ReadWriteRiscvCsr<u32, pmpconfig::pmpcfg::Register>,
pub pmpcfg3: ReadWriteRiscvCsr<u32, pmpconfig::pmpcfg::Register>,
pub pmpaddr0: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr1: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr2: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr3: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr4: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr5: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr6: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr7: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr8: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr9: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr10: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr11: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr12: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr13: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr14: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub pmpaddr15: ReadWriteRiscvCsr<u32, pmpaddr::pmpaddr::Register>,
pub mie: ReadWriteRiscvCsr<u32, mie::mie::Register>,
pub mscratch: ReadWriteRiscvCsr<u32, mscratch::mscratch::Register>,
pub mepc: ReadWriteRiscvCsr<u32, mepc::mepc::Register>,
pub mcause: ReadWriteRiscvCsr<u32, mcause::mcause::Register>,
pub mtval: ReadWriteRiscvCsr<u32, mtval::mtval::Register>,
pub mip: ReadWriteRiscvCsr<u32, mip::mip::Register>,
pub mtvec: ReadWriteRiscvCsr<u32, mtvec::mtvec::Register>,
pub stvec: ReadWriteRiscvCsr<u32, stvec::stvec::Register>,
pub utvec: ReadWriteRiscvCsr<u32, utvec::utvec::Register>,
pub mstatus: ReadWriteRiscvCsr<u32, mstatus::mstatus::Register>,
}
// Define the address of all the CSRs.
pub const CSR: &CSR = &CSR {
mie: ReadWriteRiscvCsr::new(0x304),
mtvec: ReadWriteRiscvCsr::new(0x305),
mstatus: ReadWriteRiscvCsr::new(0x300),
utvec: ReadWriteRiscvCsr::new(0x005),
stvec: ReadWriteRiscvCsr::new(0x105),
mscratch: ReadWriteRiscvCsr::new(0x340),
mepc: ReadWriteRiscvCsr::new(0x341),
mcause: ReadWriteRiscvCsr::new(0x342),
mtval: ReadWriteRiscvCsr::new(0x343),
mip: ReadWriteRiscvCsr::new(0x344),
pmpcfg0: ReadWriteRiscvCsr::new(0x3A0),
pmpcfg1: ReadWriteRiscvCsr::new(0x3A1),
pmpcfg2: ReadWriteRiscvCsr::new(0x3A2),
pmpcfg3: ReadWriteRiscvCsr::new(0x3A3),
pmpaddr0: ReadWriteRiscvCsr::new(0x3B0),
pmpaddr1: ReadWriteRiscvCsr::new(0x3B1),
pmpaddr2: ReadWriteRiscvCsr::new(0x3B2),
pmpaddr3: ReadWriteRiscvCsr::new(0x3B3),
pmpaddr4: ReadWriteRiscvCsr::new(0x3B4),
pmpaddr5: ReadWriteRiscvCsr::new(0x3B5),
pmpaddr6: ReadWriteRiscvCsr::new(0x3B6),
pmpaddr7: ReadWriteRiscvCsr::new(0x3B7),
pmpaddr8: ReadWriteRiscvCsr::new(0x3B8),
pmpaddr9: ReadWriteRiscvCsr::new(0x3B9),
pmpaddr10: ReadWriteRiscvCsr::new(0x3BA),
pmpaddr11: ReadWriteRiscvCsr::new(0x3BB),
pmpaddr12: ReadWriteRiscvCsr::new(0x3BC),
pmpaddr13: ReadWriteRiscvCsr::new(0x3BD),
pmpaddr14: ReadWriteRiscvCsr::new(0x3BE),
pmpaddr15: ReadWriteRiscvCsr::new(0x3BF),
};