From ecf940e34b42f78f9651a73e8bcd0c6dc3c75cb5 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sat, 15 Oct 2022 14:12:31 -0700
Subject: Depend on external nanosim dependency.

---
 memory/dram.h | 96 -----------------------------------------------------------
 1 file changed, 96 deletions(-)
 delete mode 100644 memory/dram.h

(limited to 'memory/dram.h')

diff --git a/memory/dram.h b/memory/dram.h
deleted file mode 100644
index f59c7a6..0000000
--- a/memory/dram.h
+++ /dev/null
@@ -1,96 +0,0 @@
-#pragma once
-
-#include <array>
-#include <cstdint>
-#include <cstring>
-#include <istream>
-#include <map>
-#include <string>
-#include <utility>
-
-#include "memory/line.h"
-
-namespace memory {
-    struct dram : public infra::sim {
-        static constexpr std::uint64_t PAGE_LINES_LOG2 = 20 - LINE_BYTES_LOG2;
-        static constexpr std::uint64_t PAGE_LINES = 1 << PAGE_LINES_LOG2;
-        static constexpr std::uint64_t PAGE_LINE_OFFSET_MASK = PAGE_LINES - 1;
-        static constexpr std::uint64_t PAGE_BYTES_LOG2 = PAGE_LINES_LOG2 + LINE_BYTES_LOG2;
-        static constexpr std::uint64_t PAGE_BYTES = 1 << PAGE_BYTES_LOG2;
-        static constexpr std::uint64_t PAGE_BYTE_OFFSET_MASK = PAGE_BYTES - 1;
-
-        typedef std::array<line, PAGE_LINES> page;
-
-        std::map<std::uint64_t, page> image;
-
-        struct response {
-            infra::transaction transaction;
-            std::uint64_t line_address;
-            line data;
-        };
-
-        struct command {
-            infra::transaction transaction;
-            std::uint64_t line_address;
-            line data;
-            std::array<bool, LINE_BYTES> mask;
-            bool write = false;
-            infra::port<response> *responsep = nullptr;
-        };
-
-        infra::port<command> commandp;
-
-        void clock() {
-            if (commandp.can_read()) {
-                const auto &c = commandp.peek();
-                if (!c.responsep || c.responsep->can_write()) {
-                    auto page_address = c.line_address >> PAGE_LINES_LOG2;
-                    auto page_line = c.line_address & PAGE_LINE_OFFSET_MASK;
-                    if (c.write) {
-                        pte(c.transaction, "s", fmt::format("store {:x}-{:x}", page_address, page_line));
-                        if (c.responsep) {
-                            response r;
-                            r.transaction = c.transaction;
-                            r.line_address = c.line_address;
-                            r.data = c.data;
-                            c.responsep->write(std::move(r));
-                        }
-                        auto [p, emplaced] = image.try_emplace(page_address);
-                        if (emplaced)
-                            for (unsigned int i = 0; i < PAGE_LINES; ++i)
-                                p->second[i].fill(0);
-                        auto &l = p->second[page_line];
-                        for (unsigned int i = 0; i < LINE_BYTES; ++i)
-                            if (c.mask[i])
-                                l[i] = c.data[i];
-                    } else {
-                        pte(c.transaction, "f", fmt::format("fill {:x}-{:x}", page_address, page_line));
-                        if (c.responsep) {
-                            response r;
-                            r.transaction = c.transaction;
-                            r.line_address = c.line_address;
-                            if (auto p = image.find(page_address); p != image.end())
-                                r.data = p->second[page_line];
-                            else
-                                r.data.fill(0);
-                            c.responsep->write(std::move(r));
-                        }
-                    }
-                    commandp.discard();
-                }
-            }
-        }
-
-        void load(std::istream &fh) {
-            for (unsigned int page = 0; ; ++page) {
-                auto [p, emplaced] = image.try_emplace(page);
-                if (emplaced)
-                    for (unsigned int i = 0; i < PAGE_LINES; ++i)
-                        p->second[i].fill(0);
-                for (unsigned int line = 0; line < PAGE_LINES; ++line)
-                    if (!fh.read(reinterpret_cast<char *>(p->second[line].data()), LINE_BYTES))
-                        return;
-            }
-        }
-    };
-}
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