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diff --git a/riscv/riscv-probe/libfemto/README.md b/riscv/riscv-probe/libfemto/README.md new file mode 100644 index 0000000..86cd934 --- /dev/null +++ b/riscv/riscv-probe/libfemto/README.md @@ -0,0 +1,28 @@ +# libfemto + +libfemto is a lightweight bare-metal C library for embedded RISC-V development. +libfemto provides: + +- Reduced set of the _POSIX.1-2017 / IEEE 1003.1-2017_ standard +- Simple lightweight hardware configuration mechanism +- RISC-V machine mode functions and macros +- Console and power device drivers + +libfemto implements a reduced set of the _POSIX.1-2017 / IEEE 1003.1-2017_ +standard, with the addition of glibc's `getauxval` API to access hardware +configuration in an auxiliary vector (`__auxv`) that contains tuples +describing the target environment. The auxiliary vector is intended as a +lightweight mechanism to pass dynamic configuration information on embedded +targets, serving as an alternative to compile time constants used during +hardware initialization. The auxiliary vector API has been repurposed to +allow retrieval of hardware configuration parameters such as clock +frequencies and device base addresses for use as a compact alternative to +(DTB) Device Tree Binary, which is not available on small embedded targets. + +libfemto contains the following device drivers: + +- HTIF (Host Target Interface) +- NS16550A UART Console +- SiFive UART Console +- SiFive Test Device +- Semihosting Syscalls |