This patch set gives an implementation of "RISC-V Core-Local Interrupt Controller(CLIC) Version 0.9-draft-20210217". It comes from [1], where you can find the pdf format or the source code.
I take over the job from Michael Clark, who gave the first implementation of clic-v0.7 specification. If there is any copyright question, please let me know. Features: 1. support four kinds of trigger types. 2. Preserve the CSR WARL/WPRI semantics. 3. Option to select different modes, such as M/S/U or M/U. 4. At most 4096 interrupts. 5. At most 1024 apertures. Todo: 1. Encode the interrupt trigger information to exccode. 2. Support complete CSR mclicbase when its number is fixed. 3. Gave each aperture an independend address. It have passed my qtest case and freertos test. Welcome to have a try for your hardware. Any advice is welcomed. Thanks very much. Zhiwei [1] specification website: https://github.com/riscv/riscv-fast-interrupt. [2] Michael Clark origin work: https://github.com/sifive/riscv-qemu/tree/sifive-clic. LIU Zhiwei (11): target/riscv: Add CLIC CSR mintstatus target/riscv: Update CSR xintthresh in CLIC mode hw/intc: Add CLIC device target/riscv: Update CSR xie in CLIC mode target/riscv: Update CSR xip in CLIC mode target/riscv: Update CSR xtvec in CLIC mode target/riscv: Update CSR xtvt in CLIC mode target/riscv: Update CSR xnxti in CLIC mode target/riscv: Update CSR mclicbase in CLIC mode target/riscv: Update interrupt handling in CLIC mode target/riscv: Update interrupt return in CLIC mode default-configs/devices/riscv32-softmmu.mak | 1 + default-configs/devices/riscv64-softmmu.mak | 1 + hw/intc/Kconfig | 3 + hw/intc/meson.build | 1 + hw/intc/riscv_clic.c | 836 ++++++++++++++++++++ include/hw/intc/riscv_clic.h | 103 +++ target/riscv/cpu.h | 9 + target/riscv/cpu_bits.h | 32 + target/riscv/cpu_helper.c | 117 ++- target/riscv/csr.c | 247 +++++- target/riscv/op_helper.c | 25 + 11 files changed, 1363 insertions(+), 12 deletions(-) create mode 100644 hw/intc/riscv_clic.c create mode 100644 include/hw/intc/riscv_clic.h -- 2.25.1
