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Diffstat (limited to '')
-rw-r--r-- | library/stdarch/crates/core_arch/src/riscv64/mod.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/library/stdarch/crates/core_arch/src/riscv64/mod.rs b/library/stdarch/crates/core_arch/src/riscv64/mod.rs new file mode 100644 index 000000000..751b9a860 --- /dev/null +++ b/library/stdarch/crates/core_arch/src/riscv64/mod.rs @@ -0,0 +1,49 @@ +//! RISC-V RV64 specific intrinsics +use crate::arch::asm; + +/// Loads virtual machine memory by unsigned word integer +/// +/// This instruction performs an explicit memory access as though `V=1`; +/// i.e., with the address translation and protection, and the endianness, that apply to memory +/// accesses in either VS-mode or VU-mode. +/// +/// This operation is not available under RV32 base instruction set. +/// +/// This function is unsafe for it accesses the virtual supervisor or user via a `HLV.WU` +/// instruction which is effectively a dereference to any memory address. +#[inline] +pub unsafe fn hlv_wu(src: *const u32) -> u32 { + let value: u32; + asm!(".insn i 0x73, 0x4, {}, {}, 0x681", out(reg) value, in(reg) src, options(readonly, nostack)); + value +} + +/// Loads virtual machine memory by double integer +/// +/// This instruction performs an explicit memory access as though `V=1`; +/// i.e., with the address translation and protection, and the endianness, that apply to memory +/// accesses in either VS-mode or VU-mode. +/// +/// This operation is not available under RV32 base instruction set. +/// +/// This function is unsafe for it accesses the virtual supervisor or user via a `HLV.D` +/// instruction which is effectively a dereference to any memory address. +#[inline] +pub unsafe fn hlv_d(src: *const i64) -> i64 { + let value: i64; + asm!(".insn i 0x73, 0x4, {}, {}, 0x6C0", out(reg) value, in(reg) src, options(readonly, nostack)); + value +} + +/// Stores virtual machine memory by double integer +/// +/// This instruction performs an explicit memory access as though `V=1`; +/// i.e., with the address translation and protection, and the endianness, that apply to memory +/// accesses in either VS-mode or VU-mode. +/// +/// This function is unsafe for it accesses the virtual supervisor or user via a `HSV.D` +/// instruction which is effectively a dereference to any memory address. +#[inline] +pub unsafe fn hsv_d(dst: *mut i64, src: i64) { + asm!(".insn r 0x73, 0x4, 0x37, x0, {}, {}", in(reg) dst, in(reg) src, options(nostack)); +} |