1 files changed, 73 insertions, 0 deletions
diff --git a/include/gba/flash_internal.h b/include/gba/flash_internal.h
new file mode 100644
index 0000000..48d8843
--- /dev/null
+++ b/include/gba/flash_internal.h
@@ -0,0 +1,73 @@
+#ifndef GUARD_GBA_FLASH_INTERNAL_H
+#define GUARD_GBA_FLASH_INTERNAL_H
+
+#define FLASH_BASE ((u8 *)0xE000000)
+
+#define FLASH_WRITE(addr, data) ((*(vu8 *)(FLASH_BASE + (addr))) = (data))
+
+#define FLASH_ROM_SIZE_1M 131072 // 1 megabit ROM
+
+#define SECTORS_PER_BANK 16
+
+struct FlashSector
+{
+    u32 size;
+    u8 shift;
+    u16 count;
+    u16 top;
+};
+
+struct FlashType {
+    u32 romSize;
+    struct FlashSector sector;
+    u16 wait[2]; // game pak bus read/write wait
+
+    // TODO: add support for anonymous unions/structs if possible
+    union {
+        struct {
+        u8 makerId;
+        u8 deviceId;
+        } separate;
+        u16 joined;
+    } ids;
+};
+
+struct FlashSetupInfo
+{
+    u16 (*programFlashSector)(u16, u8 *);
+    u16 (*eraseFlashChip)(void);
+    u16 (*eraseFlashSector)(u16);
+    u16 (*waitForFlashWrite)(u8, u8 *, u8);
+    const u16 *maxTime;
+    struct FlashType type;
+};
+
+extern u16 gFlashNumRemainingBytes;
+
+extern u16 (*ProgramFlashSector)(u16, u8 *);
+extern u16 (*EraseFlashChip)(void);
+extern u16 (*EraseFlashSector)(u16);
+extern u16 (*WaitForFlashWrite)(u8, u8 *, u8);
+extern const u16 *gFlashMaxTime;
+extern const struct FlashType *gFlash;
+
+extern u8 (*PollFlashStatus)(u8 *);
+extern u8 gFlashTimeoutFlag;
+
+extern const struct FlashSetupInfo MX29L010;
+extern const struct FlashSetupInfo LE26FV10N1TS;
+extern const struct FlashSetupInfo DefaultFlash;
+
+void SwitchFlashBank(u8 bankNum);
+u16 ReadFlashId(void);
+void StartFlashTimer(u8 phase);
+void SetReadFlash1(u16 *dest);
+void StopFlashTimer(void);
+
+u16 WaitForFlashWrite_Common(u8 phase, u8 *addr, u8 lastData);
+
+u16 EraseFlashChip_MX(void);
+u16 EraseFlashSector_MX(u16 sectorNum);
+u16 ProgramFlashSector_MX(u16 sectorNum, u8 *src);
+
+#endif // GUARD_GBA_FLASH_INTERNAL_H