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Diffstat (limited to 'tb/avalon.impl.hpp')
| -rw-r--r-- | tb/avalon.impl.hpp | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/tb/avalon.impl.hpp b/tb/avalon.impl.hpp deleted file mode 100644 index 12483f9..0000000 --- a/tb/avalon.impl.hpp +++ /dev/null @@ -1,183 +0,0 @@ -#ifndef TALLER_AVALON_IMPL_HPP -#define TALLER_AVALON_IMPL_HPP - -#include <cassert> -#include <cstdio> - -namespace taller::avalon -{ - template<class Platform> - inline interconnect<Platform>::interconnect(Platform &plat) noexcept - : plat(plat) - {} - - template<class Platform> - void interconnect<Platform>::attach(slave &dev) - { - auto base = dev.base_address(); - auto mask = dev.address_mask(); - assert((base & mask) == base); - - devices.push_back(binding { base, mask, dev }); - } - - template<class Platform> - void interconnect<Platform>::attach_intc(interrupt_controller &intc) - { - assert(root_intc == nullptr); - - attach(intc.as_slave()); - root_intc = &intc; - } - - template<class Platform> - bool interconnect<Platform>::tick(bool clk) noexcept - { - if (!plat.reset_reset_n) { - active = nullptr; - plat.avl_irq = 0; - - avl_read = false; - avl_write = false; - avl_address = 0; - avl_byteenable = 0; - - return true; - } - - if (active) { - assert(avl_address == plat.avl_address); - assert(avl_read == plat.avl_read); - assert(avl_write == plat.avl_write); - assert(avl_writedata == plat.avl_writedata); - assert(avl_byteenable == plat.avl_byteenable); - } - - if (!clk) { - tick_falling(); - return true; - } else if (!active) - assert(!avl_read || !avl_write); - - try { - tick_rising(); - return true; - } catch (const avl_bus_error&) { - return false; - } - } - - template<class Platform> - void interconnect<Platform>::tick_rising() - { - for (auto &binding : devices) - binding.dev.tick(); - - if (root_intc) - plat.avl_irq = root_intc->irq(); - - if (!active) { - avl_address = plat.avl_address; - avl_read = plat.avl_read; - avl_write = plat.avl_write; - avl_writedata = plat.avl_writedata; - avl_byteenable = plat.avl_byteenable; - - if (!avl_read && !avl_write) - return; - - for (auto &binding : devices) - if ((avl_address & binding.mask) == binding.base) { - active = &binding.dev; - break; - } - - if (!active) [[unlikely]] { - bail(); - - const char *op = avl_read ? "read" : "write"; - fprintf(stderr, "[avl] attempt to %s memory hole at 0x%08x\n", op, avl_address); - - throw avl_bus_error{"memory hole addressed"}; - } else if(avl_address & 0b1111) [[unlikely]] { - bail(); - fprintf(stderr, "[avl] unaligned address: 0x%08x\n", avl_address); - - throw avl_bus_error{"unaligned address"}; - } - } - - auto pos = (avl_address & ~active->address_mask()) >> 4; - - if (avl_read) { - line readdata; - plat.avl_waitrequest = !active->read_line(pos, readdata, avl_byteenable); - plat.avl_readdata = readdata; - } else if (avl_write) - plat.avl_waitrequest = !active->write_line(pos, avl_writedata, avl_byteenable); - } - - template<class Platform> - void interconnect<Platform>::tick_falling() noexcept - { - for (auto &binding : devices) - binding.dev.tick_falling(); - - if (!plat.avl_waitrequest) - active = nullptr; - } - - template<class Platform> - void interconnect<Platform>::bail() noexcept - { - for (auto &binding : devices) - binding.dev.bail(); - } - - template<class Platform> - bool interconnect<Platform>::dump(std::uint32_t addr, std::uint32_t &word) - { - std::uint32_t avl_address = addr << 2; - - auto *dev = resolve_external(avl_address); - if (!dev) - return false; - - auto pos = (avl_address & ~dev->address_mask()) >> dev->word_bits(); - - while (!dev->read(pos, word)) - continue; - - return true; - } - - template<class Platform> - bool interconnect<Platform>::patch(std::uint32_t addr, std::uint32_t writedata) - { - std::uint32_t avl_address = addr << 2; - - auto *dev = resolve_external(avl_address); - if (!dev) - return false; - - auto pos = (avl_address & ~dev->address_mask()) >> dev->word_bits(); - - while (!dev->write(pos, writedata, 0b1111)) - continue; - - return true; - } - - template<class Platform> - slave* interconnect<Platform>::resolve_external(std::uint32_t avl_address) - { - for (auto &binding : devices) - if ((avl_address & binding.mask) == binding.base) - return &binding.dev; - - fprintf(stderr, "[avl] attempt to access hole at 0x%08x\n", avl_address); - return nullptr; - } -} - -#endif |