diff options
Diffstat (limited to 'tb/avalon.hpp')
| -rw-r--r-- | tb/avalon.hpp | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/tb/avalon.hpp b/tb/avalon.hpp deleted file mode 100644 index b184999..0000000 --- a/tb/avalon.hpp +++ /dev/null @@ -1,256 +0,0 @@ -#ifndef TALLER_AVALON_HPP -#define TALLER_AVALON_HPP - -#include <cassert> -#include <cstdint> -#include <cstdio> -#include <stdexcept> -#include <vector> - -#include <verilated.h> - -namespace taller::avalon -{ - union line - { - __int128 qword; - VlWide<4> verilated; - - struct - { - std::uint64_t lo, hi; - }; - - struct - { - std::uint32_t words[4]; - }; - - inline line() noexcept - : lo{0}, hi{0} - {} - - inline line(VlWide<4> verilated) noexcept - : verilated(verilated) - {} - - inline operator VlWide<4>() const noexcept - { - return this->verilated; - } - - inline bool operator==(const VlWide<4> &verilated) const noexcept - { - line verilated_line{verilated}; - return this->hi == verilated_line.hi && this->lo == verilated_line.lo; - } - - inline bool operator!=(const VlWide<4> &verilated) const noexcept - { - return !(*this == verilated); - } - }; - - static_assert(sizeof(line) == 16); - - class slave - { - public: - inline slave(std::uint32_t base, std::uint32_t size, std::size_t word_size) noexcept - : 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; - } - - inline virtual void tick() noexcept - {} - - inline virtual void tick_falling() noexcept - {} - - inline virtual void bail() noexcept - {} - - virtual bool read(std::uint32_t addr, std::uint32_t &data) - { - line line_data; - if (!this->read_line(addr >> 2, line_data, 0b1111 << ((addr & 0b11) * 4))) - return false; - - data = line_data.words[addr & 0b11]; - return true; - } - - virtual bool read_line(std::uint32_t addr, line &data, unsigned byte_enable) - { - //XXX: Realmente es esto lo que genera qsys? Avalon spec no es clara - if (byte_enable & 0x000f) - return this->read(addr << 2, data.words[0]); - else if (byte_enable & 0x00f0) - return this->read((addr << 2) + 1, data.words[1]); - else if (byte_enable & 0x0f00) - return this->read((addr << 2) + 2, data.words[2]); - else if (byte_enable & 0xf000) - return this->read((addr << 2) + 3, data.words[3]); - - return true; - } - - virtual bool write - ( - std::uint32_t addr, std::uint32_t data, unsigned byte_enable = 0b1111 - ) { - line line_data; - line_data.words[addr & 0b11] = data; - - return this->write_line(addr >> 2, line_data, byte_enable << ((addr & 0b11) * 4)); - } - - virtual bool write_line(std::uint32_t addr, const line &data, unsigned byte_enable) - { - unsigned offset = 0; - if (byte_enable & 0x00f0) - offset = 1; - else if (byte_enable & 0x0f00) - offset = 2; - else if (byte_enable & 0xf000) - offset = 3; - - return this->write - ( - (addr << 2) + offset, - data.words[offset], - (byte_enable >> (offset * 4)) & 0b1111 - ); - } - - inline virtual bool irq() noexcept - { - return false; - } - - 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; - } - }; - - struct irq_lines - { - slave *timer = nullptr; - slave *jtaguart = nullptr; - }; - - class interrupt_controller : private slave - { - public: - interrupt_controller(std::uint32_t base) noexcept; - - virtual bool read(std::uint32_t addr, std::uint32_t &data) noexcept final override; - virtual bool write(std::uint32_t addr, std::uint32_t data, unsigned byte_enable) noexcept final override; - - virtual bool irq() noexcept final override; - - inline slave &as_slave() noexcept - { - return *this; - } - - inline irq_lines &lines() noexcept - { - return irqs; - } - - private: - irq_lines irqs; - std::uint32_t mask = 0; - - std::uint32_t status() noexcept; - }; - - class avl_bus_error : public std::runtime_error - { - public: - using std::runtime_error::runtime_error; - }; - - template<class Platform> - class interconnect - { - public: - interconnect(Platform &plat) noexcept; - - bool tick(bool clk) noexcept; - void tick_rising(); - void tick_falling() noexcept; - - void attach(slave &dev); - void attach_intc(interrupt_controller &intc); - void bail() noexcept; - - bool dump(std::uint32_t addr, std::uint32_t &word); - bool patch(std::uint32_t addr, std::uint32_t readdata); - - private: - struct binding - { - std::uint32_t base; - std::uint32_t mask; - slave &dev; - }; - - Platform &plat; - slave* active = nullptr; - std::vector<binding> devices; - interrupt_controller *root_intc = nullptr; - std::uint32_t avl_address = 0; - line avl_writedata; - unsigned avl_byteenable = 0; - bool avl_read = false; - bool avl_write = false; - - slave *resolve_external(std::uint32_t avl_address); - }; -} - -#include "avalon.impl.hpp" - -#endif |