firmware: bootloader with firmware upgrade

src/bootldr/bits.h

@@ -0,0 +1,21 @@
+#ifndef _ARM_BITS_H
+#define _ARM_BITS_H
+
+/* The classic macro */
+#define BV(x) (1<<(x))
+
+/* CM3 bit-band access macro - no error checks! */
+#define BITBAND(addr,bit) \
+  (*((volatile unsigned long *)( \
+     ((unsigned long)&(addr) & 0x01ffffff)*32 + \
+      (bit)*4 + 0x02000000 + ((unsigned long)&(addr) & 0xfe000000) \
+  )))
+
+#define BITBAND_OFF(addr,offset,bit) \
+  (*((volatile unsigned long *)( \
+     (((unsigned long)&(addr) + offset) & 0x01ffffff)*32 + \
+      (bit)*4 + 0x02000000 + (((unsigned long)&(addr) + offset) & 0xfe000000) \
+  )))
+
+
+#endif