1 files changed, 82 insertions, 0 deletions
diff --git a/os/pc/flashif.h b/os/pc/flashif.h
new file mode 100644
index 00000000..b5391798
--- /dev/null
+++ b/os/pc/flashif.h
@@ -0,0 +1,82 @@
+typedef struct Flash Flash;
+typedef struct Flashpart Flashpart;
+typedef struct Flashregion Flashregion;
+
+/*
+ * logical partitions
+ */
+enum {
+	Maxflashpart = 8
+};
+
+struct Flashpart {
+	char*	name;
+	ulong	start;
+	ulong	end;
+};
+
+enum {
+	Maxflashregion = 8
+};
+
+/*
+ * physical erase block regions
+ */
+struct Flashregion {
+	int	n;	/* number of blocks in region */
+	ulong	start;	/* physical base address (allowing for banks) */
+	ulong	end;
+	ulong	erasesize;
+};
+
+/*
+ * structure defining a flash memory card
+ */
+struct Flash {
+	QLock;	/* interlock on flash operations */
+	Flash*	next;
+
+	/* the following are filled in by devflash before Flash.reset called */
+	char*	name;
+	void*	addr;
+	ulong	size;
+	int	(*reset)(Flash*);
+
+	/* the following are filled in by the reset routine */
+	int	(*eraseall)(Flash*);
+	int	(*erasezone)(Flash*, int);
+	int	(*write)(Flash*, ulong, void*, long);	/* writes of correct width and alignment */
+	int	(*suspend)(Flash*);
+	int	(*resume)(Flash*);
+
+	/* the following might be filled in by either archflashreset or the reset routine */
+	int	nr;
+	Flashregion	regions[Maxflashregion];
+
+	uchar	id;	/* flash manufacturer ID */
+	uchar	devid;	/* flash device ID */
+	int	width;	/* bytes per flash line */
+	int	erasesize;	/* size of erasable unit (accounting for width) */
+	void*	data;		/* flash type routines' private storage, or nil */
+	ulong	unusable;	/* bit mask of unusable sections */
+	Flashpart	part[Maxflashpart];	/* logical partitions */
+	int	protect;	/* software protection */
+};
+
+/*
+ * called by link routine of driver for specific flash type: arguments are
+ * conventional name for card type/model, and card driver's reset routine.
+ */
+void	addflashcard(char*, int (*)(Flash*));
+
+/*
+ * called by devflash.c:/^flashreset; if flash exists,
+ * sets type, address, and size in bytes of flash
+ * and returns 0; returns -1 if flash doesn't exist
+ */
+int	archflashreset(char*, void**, long*);
+
+/*
+ * enable/disable write protect
+ */
+void	archflashwp(int);