System: Scaffolding for multi-system/multi-bios

src/core/bios.h

@@ -0,0 +1,37 @@
+#pragma once
+#include "types.h"
+#include <optional>
+#include <string_view>
+#include <vector>
+
+namespace BIOS {
+enum : u32
+{
+  BIOS_BASE = 0x1FC00000,
+  BIOS_SIZE = 0x80000
+};
+
+using Image = std::vector<u8>;
+
+struct Hash
+{
+  u8 bytes[16];
+
+  ALWAYS_INLINE bool operator==(const Hash& bh) const { return (std::memcmp(bytes, bh.bytes, sizeof(bytes)) == 0); }
+  ALWAYS_INLINE bool operator!=(const Hash& bh) const { return (std::memcmp(bytes, bh.bytes, sizeof(bytes)) != 0); }
+
+  std::string ToString() const;
+};
+
+Hash GetHash(const Image& image);
+std::optional<Image> LoadImageFromFile(std::string_view filename);
+std::optional<Hash> GetHashForFile(std::string_view filename);
+
+bool IsValidHashForRegion(ConsoleRegion region, const Hash& hash);
+
+void PatchBIOS(Image& image, u32 address, u32 value, u32 mask = UINT32_C(0xFFFFFFFF));
+
+bool PatchBIOSEnableTTY(Image& image, const Hash& hash);
+bool PatchBIOSFastBoot(Image& image, const Hash& hash);
+bool PatchBIOSForEXE(Image& image, u32 r_pc, u32 r_gp, u32 r_sp, u32 r_fp);
+} // namespace BIOS