bus: use a switch case for memory access

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
2024-06-14 20:47:04 +05:30
parent 08060a767f
commit cb75ebf8ef
2 changed files with 40 additions and 17 deletions
--- a/include/bus.hh
+++ b/include/bus.hh
@@ -39,7 +39,8 @@ class Bus {
    std::optional<std::span<uint8_t>> write(uint32_t);

 #define MEMORY_REGION(name, start)                                             \
-    static constexpr uint32_t name##_START = start;
+    static constexpr uint32_t name##_START = start;                            \
+    static constexpr uint8_t name##_REGION = start >> 24 & 0xFF;

 #define DECL_MEMORY(name, ident, start, end)                                   \
    MEMORY_REGION(name, start)                                                 \
@@ -70,6 +71,7 @@ class Bus {
    MEMORY_REGION(ROM_2, 0x0C000000)

 #undef MEMORY_REGION
+
    std::vector<uint8_t> rom;

    std::unique_ptr<IoDevices> io;