diff options
Diffstat (limited to 'tb/avalon.hpp')
| -rw-r--r-- | tb/avalon.hpp | 56 |
1 files changed, 52 insertions, 4 deletions
diff --git a/tb/avalon.hpp b/tb/avalon.hpp index a00ced0..8134677 100644 --- a/tb/avalon.hpp +++ b/tb/avalon.hpp @@ -1,7 +1,9 @@ -#ifndef AVALON_HPP -#define AVALON_HPP +#ifndef TALLER_AVALON_HPP +#define TALLER_AVALON_HPP +#include <cassert> #include <cstdint> +#include <cstdio> #include <vector> namespace taller::avalon @@ -9,11 +11,57 @@ namespace taller::avalon class slave { public: - virtual std::uint32_t base_address() noexcept = 0; - virtual std::uint32_t address_mask() noexcept = 0; + inline slave(std::uint32_t base, std::uint32_t size, std::size_t word_size) + : base(base), + mask(~(size - 1)), + word(log2i(word_size)) + { + assert(!((word_size - 1) & word_size)); + assert(!(base & word_mask()) && !(size & word_mask()) && !((size - 1) & size)); + } + + inline std::uint32_t base_address() noexcept + { + return base; + } + + inline std::uint32_t address_mask() noexcept + { + return mask; + } + + inline std::uint32_t word_mask() noexcept + { + return (1 << word) - 1; + } + + inline std::size_t word_size() noexcept + { + return 1 << word; + } + + inline unsigned word_bits() noexcept + { + return word; + } + + inline std::uint32_t address_span() noexcept + { + return ~mask + 1; + } virtual bool read(std::uint32_t addr, std::uint32_t &data) = 0; virtual bool write(std::uint32_t addr, std::uint32_t data, unsigned byte_enable) = 0; + + private: + std::uint32_t base; + std::uint32_t mask; + unsigned word; + + static inline int log2i(int i) + { + return sizeof(int) * 8 - __builtin_clz(i) - 1; + } }; template<class Platform> |