diff options
Diffstat (limited to 'riscv/plic.cc')
| -rw-r--r-- | riscv/plic.cc | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/riscv/plic.cc b/riscv/plic.cc index e2685a9..1aa5852 100644 --- a/riscv/plic.cc +++ b/riscv/plic.cc @@ -1,7 +1,10 @@ #include <sys/time.h> +#include <sstream> #include "devices.h" #include "processor.h" #include "simif.h" +#include "sim.h" +#include "dts.h" #define PLIC_MAX_CONTEXTS 15872 @@ -388,3 +391,37 @@ bool plic_t::store(reg_t addr, size_t len, const uint8_t* bytes) return ret; } + +std::string plic_generate_dts(const sim_t* sim) +{ + std::stringstream s; + s << std::hex + << " PLIC: plic@" << PLIC_BASE << " {\n" + " compatible = \"riscv,plic0\";\n" + " #address-cells = <2>;\n" + " interrupts-extended = <" << std::dec; + for (size_t i = 0; i < sim->get_cfg().nprocs(); i++) + s << "&CPU" << i << "_intc 11 &CPU" << i << "_intc 9 "; + reg_t plicbs = PLIC_BASE; + reg_t plicsz = PLIC_SIZE; + s << std::hex << ">;\n" + " reg = <0x" << (plicbs >> 32) << " 0x" << (plicbs & (uint32_t)-1) << + " 0x" << (plicsz >> 32) << " 0x" << (plicsz & (uint32_t)-1) << ">;\n" + " riscv,ndev = <0x" << PLIC_NDEV << ">;\n" + " riscv,max-priority = <0x" << ((1U << PLIC_PRIO_BITS) - 1) << ">;\n" + " #interrupt-cells = <1>;\n" + " interrupt-controller;\n" + " };\n"; + return s.str(); +} + +plic_t* plic_parse_from_fdt(const void* fdt, const sim_t* sim, reg_t* base) +{ + uint32_t plic_ndev; + if (fdt_parse_plic(fdt, base, &plic_ndev, "riscv,plic0") == 0) + return new plic_t(sim, plic_ndev); + else + return nullptr; +} + +REGISTER_DEVICE(plic, plic_parse_from_fdt, plic_generate_dts) |